Academic literature on the topic 'Aircraft noise exposure'
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Journal articles on the topic "Aircraft noise exposure"
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Dekoninck, Luc. "Detecting and Correlating Aircraft Noise Events below Ambient Noise Levels Using OpenSky Tracking Data." Proceedings 59, no. 1 (December 3, 2020): 13. http://dx.doi.org/10.3390/proceedings2020059013.
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Noise annoyance due to aircraft operations extends well beyond the 55 Lden noise contours as calculated according to the Environmental Noise Directive (END). Noise mapping beyond these contours will improve the understanding of the perception, annoyance and health impact of aircraft operations. OpenSky data can provide the spatial data to create an aircraft noise exposure map for lower exposure levels. This work presents the first step of region-wide noise exposure methodology based on open source data: detecting low LAmax aircraft events in ambient noise using spectral noise measurements and correlating the detected noise events to the matching flights retrieved from the OpenSky database. In ISO 20906:2009, the specifications of noise monitoring near airports is standardized, using LAeq,1sec values for event detection. This limits the detection potential due to masking by other noise sources in areas with low maximum levels of aircraft noise and in areas with medium maximum levels of high ambient exposure areas. The typical lower detection limit in airport-based monitoring systems ranges from 55 to 60 LAeq,max, depending on the ambient levels. Using a detection algorithm sensitive to third-octave band levels, aircrafts can be detected down to 40 LAmax in ambient noise levels of a similar magnitude. The measurement approach is opportunistic: aircraft events are detected in available environmental noise data series registered for other applications (e.g., road noise, industrial noise, etc.). Most of the measurement locations are not identified as high-exposure areas for aircraft noise. Detection settings can vary to match ambient noise levels to improve the correlation success.
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Yokoshima, Shigenori, Makoto Morinaga, Sohei Tsujimura, Koji Shimoyama, and Takashi Morihara. "Representative Exposure–Annoyance Relationships Due to Transportation Noises in Japan." International Journal of Environmental Research and Public Health 18, no. 20 (October 18, 2021): 10935. http://dx.doi.org/10.3390/ijerph182010935.
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This paper focuses on clarifying the relationship between noise exposure and the prevalence of highly annoyed people due to transportation noise in Japan. The authors accumulated 34 datasets, which were provided by Socio-Acoustic Survey Data Archive and derived from the other surveys conducted in Japan. All the datasets include the following micro-data: demographic factors, exposure, and annoyance data associated with specific noise sources. We performed secondary analyses using micro-data and established the relationships between noise exposure (Lden) and the percentage of highly annoyed people (%HA) for the following noise source: road traffic, conventional railway, Shinkansen railway, civil aircraft, and military aircraft noises. Among the five transportation noises, %HA for the military aircraft noise is the highest, followed by civil aircraft noise and Shinkansen railway noise. The %HA for conventional railway noise was higher than that for road traffic noise. To validate the representativeness of the exposure–response curves, we have discussed factors affecting the difference in annoyance. In addition, comparing the Japanese relationship with that shown in the “Environmental Noise Guidelines for the European Region,” we revealed that Japanese annoyance is higher than the WHO-reported annoyance.
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Sørensen, Mette. "Aircraft noise exposure and hypertension." Occupational and Environmental Medicine 74, no. 2 (October 28, 2016): 85–86. http://dx.doi.org/10.1136/oemed-2016-103988.
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Smith, Andrew, and Stephen Stansfeld. "Aircraft Noise Exposure, Noise Sensitivity, and Everyday Errors." Environment and Behavior 18, no. 2 (March 1986): 214–26. http://dx.doi.org/10.1177/0013916586182004.
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Saucy, Apolline, Beat Schäffer, Louise Tangermann, Danielle Vienneau, Jean-Marc Wunderli, and Martin Röösli. "Individual Aircraft Noise Exposure Assessment for a Case-Crossover Study in Switzerland." International Journal of Environmental Research and Public Health 17, no. 9 (April 26, 2020): 3011. http://dx.doi.org/10.3390/ijerph17093011.
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Accurate exposure assessment is essential in environmental epidemiological studies. This is especially true for aircraft noise, which is characterized by a high spatial and temporal variation. We propose a method to assess individual aircraft noise exposure for a case-crossover study investigating the acute effects of aircraft noise on cardiovascular deaths. We identified all cases of cardiovascular death (24,886) occurring near Zürich airport, Switzerland, over fifteen years from the Swiss National Cohort. Outdoor noise exposure at the home address was calculated for the night preceding death and control nights using flight operations information from Zürich airport and noise footprints calculated for major aircraft types and air routes. We estimated three different noise metrics: mean sound pressure level (LAeq), maximum sound pressure level (LAmax), and number above threshold 55 dB (NAT55) for different nighttime windows. Average nighttime aircraft noise levels were 45.2 dB, 64.6 dB, and 18.5 for LAeq, LAmax, and NAT55 respectively. In this paper, we present a method to estimate individual aircraft noise exposure with high spatio-temporal resolution and a flexible choice of exposure events and metrics. This exposure assessment will be used in a case-crossover study investigating the acute effects of noise on health.
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Zaporozhets, Oleksandr, Kateryna Kazhan, Kateryna Synylo, and Sergii Karpenko. "Aircraft Noise Compatibility of the Airports with Progress of Noise Reduction at Source." Volume 03 Issue 02 vm03, is02 (December 29, 2022): 96–111. http://dx.doi.org/10.23890/ijast.vm03is02.0204.
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Сreation of noise exposure maps and airport noise compatibility programs are the basic steps in aircraft noise exposure and impact management in/around the airports, both of them are fundamental for aircraft noise zoning procedures. Noise reduction at source is also a strategic element of this management, and efficient implementation of quieter aircraft designs in operation provides closer distances of the boundaries of noise zones prohibited for residences to runway axis. These new conditions oblige the decision-makers, responsible for noise management, to be stricter with procedures for noise zones definition and to include in consideration a number of new acoustic sources inside the aerodrome besides the aircraft in flight operation, which may influence the overall exposure and impact of noise on population living or/and acting around the airport. In other words, current noise exposure maps and airport noise compatibility programs must include these dominant noise sources at specific locations of the airport also, not only the flight noise sources, as it was enough before. Today such essential noise sources for consideration in airport noise management are the aircraft in maintenance and overhaul and the aircraft during the taxing between the runway and stands on apron first of all, especially if their locations are quite far from aircraft flight operation routes and close to the residential areas around the aerodrome. The noise maps are required to be calculated currently, as for aircraft operation, so as for their maintenance and overhaul, but the measurements are evident also for their confidence and accuracy purposes.
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HAINES, M. M., S. A. STANSFELD, R. F. S. JOB, B. BERGLUND, and J. HEAD. "Chronic aircraft noise exposure, stress responses, mental health and cognitive performance in school children." Psychological Medicine 31, no. 2 (February 2001): 265–77. http://dx.doi.org/10.1017/s0033291701003282.
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Background. Previous research suggests that children are a high risk group vulnerable to the effects of chronic noise exposure. However, questions remain about the nature of the noise effects and the underlying causal mechanisms. This study addresses the effects of aircraft noise exposure on children around London Heathrow airport, in terms of stress responses, mental health and cognitive performance. The research also focuses on the underlying causal mechanisms contributing to the cognitive effects and potential confounding factors.Methods. The cognitive performance and health of 340 children aged 8–11 years attending four schools in high aircraft noise areas (16h outdoor Leq>66dBA) was compared with children attending four matched control schools exposed to lower levels of aircraft noise (16h outdoor Leq<57dBA). Mental health and cognitive tests were group administered to the children in the schools. Salivary cortisol was measured in a subsample of children.Results. Chronic aircraft noise exposure was associated with higher levels of noise annoyance and poorer reading comprehension measured by standardized scales with adjustments for age, deprivation and main language spoken. Chronic aircraft noise was not associated with mental health problems and raised cortisol secretion. The association between aircraft noise exposure and reading comprehension could not be accounted for by the mediating role of annoyance, confounding by social class, deprivation, main language or acute noise exposure.Conclusions.These results suggest that chronic aircraft noise exposure is associated with impaired reading comprehension and high levels of noise annoyance but not mental health problems in children.
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Morinaga, Makoto, Takanori Matsui, Sonoko Kuwano, and Seiichiro Namba. "An experiment on the feeling of separation when multiple aircraft noises are overlapped." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 4 (August 1, 2021): 2058–63. http://dx.doi.org/10.3397/in-2021-2041.
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In order to calculate the A-weighted single event sound exposure level () of aircraft noise, the following method is described in the manual for aircraft noise measurement in Japan. Firstly a time-section, which is the range between two points where the noise level is 10 dB lower than the maximum noise level (), should be identified, and secondly the energy within the section is integrated. This method can easily be applied to the single event noises. When multiple aircraft noises are overlapped simultaneously, there are cases where cannot be calculated adequately by this method. In such cases, it is required to record the number of aircraft noises in the field measurements. However, even in the case of manned measurement, it is not easy to separate sound sources just by listening to the sound. A pilot study of the psychoacoustic experiment was conducted using the stimuli where multiple aircraft noises were overlapped in order to find what condition is needed so that multiple aircraft noises were separately perceived. It was suggested that a considerable time interval was needed so that people felt the separation between aircraft noises only with auditory information.
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HAINES, M. M., S. A. STANSFELD, S. BRENTNALL, J. HEAD, B. BERRY, M. JIGGINS, and S. HYGGE. "The West London Schools Study: the effects of chronic aircraft noise exposure on child health." Psychological Medicine 31, no. 8 (November 2001): 1385–96. http://dx.doi.org/10.1017/s003329170100469x.
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Background. Previous field studies have indicated that children's cognitive performance is impaired by chronic aircraft noise exposure. However, these studies have not been of sufficient size to account adequately for the role of confounding factors. The objective of this study was to test whether cognitive impairments and stress responses (catecholamines, cortisol and perceived stress) are attributable to aircraft noise exposure after adjustment for school and individual level confounding factors and to examine whether children exposed to high levels of social disadvantage are at greater risk of noise effects.Methods. The cognitive performance and health of 451 children aged 8–11 years, attending 10 schools in high aircraft noise areas (16 h outdoor Leq > 63 dBA) was compared with children attending 10 matched control schools exposed to lower levels of aircraft noise (16 h outdoor Leq < 57 dBA).Results. Noise exposure was associated with impaired reading on difficult items and raised annoyance, after adjustment for age, main language spoken and household deprivation. There was no variation in the size of the noise effects in vulnerable subgroups of children. High levels of noise exposure were not associated with impairments in mean reading score, memory and attention or stress responses. Aircraft noise was weakly associated with hyperactivity and psychological morbidity.Conclusions. Chronic noise exposure is associated with raised noise annoyance in children. The cognitive results indicate that chronic aircraft noise exposure does not always lead to generalized cognitive effects but, rather, more selective cognitive impairments on difficult cognitive tests in children.
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Finegold, LawrenceS. "Sleep disturbance due to aircraft noise exposure." Noise and Health 12, no. 47 (2010): 88. http://dx.doi.org/10.4103/1463-1741.63208.
Full textDissertations / Theses on the topic "Aircraft noise exposure"
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Clark, Charlotte, Rocio Martin, Kempen Elise van, Tamuno Alfred, Hugh W. Davies, Jenny Head, Mary M. Haines, Lopez Isabel Barrio, Mark Matheson, and Stephen A. Stansfeld. "Exposure-effect relationships between aircraft noise and road traffic noise exposure at school and reading comprehension: the RANCH Study." Oxford University Press, 2005. http://hdl.handle.net/2429/853.
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Transport noise is an increasingly prominent feature of the urban environment, making noise pollution an important environmental public health issue. This paper reports on the 2001–2003 RANCH project, the first cross-national epidemiologic study known to examine exposure-effect relations between aircraft and road traffic noise exposure and reading comprehension. Participants were 2,010 children aged 9–10 years from 89 schools around Amsterdam Schiphol, Madrid Barajas, and London Heathrow airports. Data from the Netherlands, Spain, and the United Kingdom were pooled and analyzed using multilevel modeling. Aircraft noise exposure at school was linearly associated with impaired reading comprehension; the association was maintained after adjustment for socioeconomic variables (ß = –0.008, p = 0.012), aircraft noise annoyance, and other cognitive abilities (episodic memory, working memory, and sustained attention). Aircraft noise exposure at home was highly correlated with aircraft noise exposure at school and demonstrated a similar linear association with impaired reading comprehension. Road traffic noise exposure at school was not associated with reading comprehension in either the absence or the presence of aircraft noise (ß = 0.003, p = 0.509; ß = 0.002, p = 0.540, respectively). Findings were consistent across the three countries, which varied with respect to a range of socioeconomic and environmental variables, thus offering robust evidence of a direct exposure-effect relation between aircraft noise and reading comprehension.
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Lam, Yee-man, and 林綺雯. "GIS in aircraft noise exposure assessment, Tsuen Wan district, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29961324.
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Brooks, Callen T. (Callen Theodore). "Modeling the effects of aircraft flight track variability on community noise exposure." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113722.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 119-121).
The implementation of Performance Based Navigation (PBN) routes across the National Airspace System (NAS) has caused a significant concentration of flight tracks. This flight track concentration also creates a concentration of noise impacts on the communities surrounding airports, which has led to an increase in noise complaints at many airports that have implemented these routes. In order to understand these changes in noise, and to design procedures that could help mitigate any negative effects, it is important to have modeling tools capable of capturing the noise impacts of flight track variability. This thesis develops a model for this purpose. First, twenty days of radar flight trajectory data from 2015 and 2016 at Boston Logan International Airport (KBOS) is used to quantify the observed distributions of variability in speed, altitude, and lateral track position. It is shown that altitude and speed variability have relatively small impacts on noise, but that the impacts of observed lateral variability are significant. Using this information, a physics-based model is developed to capture the noise impacts of lateral flight track variability. This tool is then used to model several example scenarios. First, the changes in noise due to pre- and post-PBN procedures are examined for KBOS Runway 33L departures. Next, a hypothetical procedure is designed to intentionally introduce lateral dispersion to KBOS Runway 33L departures. Finally, the tool is used to rapidly model noise impacts on due to both arrival and departure operations on all runways at KBOS. The model is shown to reduce computational expense by 1-2 order of magnitude relative to traditional methods. The results of these example analyses show that increased lateral dispersion causes a significant noise reduction at higher noise levels directly below the flight track at the cost of wider contours at lower noise levels. Because of this, any decision to add or remove flight track lateral dispersion has highly localized impacts that depend on the geometry of the route and the population of the surrounding area, and thus must be closely analyzed on an individual basis.
This work was sponsored by the FAA under ASCENT Center of Excellence Project 23, Cooperative Agreement 13-C-AJFE-MIT-008.
by Callen T. Brooks.
S.M.
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Haines, Mary Magdalen. "The effects of chronic aircraft noise exposure on children's cognitive performance and stress responses." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325186.
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Floud, Sarah Katherine. "Cardiovascular disease and medication use associated with exposure to aircraft noise, road traffic noise and air pollution in populations living near airports." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/39137.
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Noise is a significant environmental problem; epidemiological evidence that noise from road traffic and aircraft may be damaging to health has been increasing. This thesis uses data from the HYENA (HYpertension and Exposure to Noise near Airports) multi-centre study. Earlier HYENA studies suggested that noise exposure increased the risk of hypertension and other risk factors for cardiovascular disease, through blood pressure spikes, reduced night-time dipping of blood pressure and raised morning salivary cortisol. This thesis found that long-term exposure to aircraft noise was associated with increased prevalence of cardiovascular disease and with the use of anti-hypertensive and anxiolytic medication. Road traffic noise was also associated with cardiovascular disease and additionally with antacid use in men. These are new findings with significant implications for public policy. Airports generate road traffic, with associated air pollution increasing the risk of cardiovascular disease. An analysis was therefore undertaken into whether the association between cardiovascular disease and road traffic noise was confounded by air pollution or if there was interaction between the exposures. Mutual confounding by noise and air pollution was found in separate analyses of three countries within HYENA. It is possible that aspects of the home environment, insulation, open windows and room orientation, affect exposure to noise and thus modify health risks. Associations between cardiovascular disease and road traffic noise were found for participants whose rooms faced the road and for those who had sound proofing installed in their home, suggesting the latter is a marker for higher exposure and/or sensitivity to noise. The effect of opening windows on the association between cardiovascular disease and noise was less clear, with an association with aircraft noise but not with road traffic noise.
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Gille, Laure-Anne. "Caractérisation physique et perceptive de différentes compositions de trafic routier urbain pour la détermination d'indicateurs de gêne en situation de mono-exposition et de multi-exposition." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSET005/document.
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Le bruit de la circulation routière, et en particulier le bruit des deux-roues motorisés, constituent une importante source de gêne sonore. Afin d’estimer l’exposition sonore dans les villes de plus 100 000 habitants, la directive européenne 2002/49/CE impose la réalisation de cartes de bruit stratégiques, basées sur l’indice Lden. Cet indice est également utilisé dans des relations exposition-réponse, afin de prédire les pourcentages de personnes gênées, notamment par le bruit du trafic routier. En couplant les cartes de bruit stratégiques et ces relations exposition-réponse, des cartes de gêne pourraient être établies. Toutefois, la pertinence de cet indice pour prédire la gêne due au bruit en milieu urbain est souvent remise en cause, car de nombreux facteurs acoustiques influents (e.g. les caractéristiques spectrales et temporelles) ne sont pas pris en compte par cet indice. Cette thèse vise à améliorer la caractérisation de la gêne due au bruit de trafic routier urbain en considérant différentes compositions de trafic et la présence des deux-roues motorisés. Dans ce but, des expériences sont menées en conditions contrôlées. Une première étude a porté sur l’influence de plusieurs facteurs acoustiques relatifs aux périodes de calme et aux bruits de passage de véhicules sur la gêne due au bruit de trafic routier urbain. Cette étude a conclu à l’influence de la présence de périodes de calme et du nombre de véhicules au sein du trafic routier urbain et à l’absence d’influence de l’ordre des véhicules routiers, de la position et de la durée des périodes de calme. Ces résultats ont été utilisés afin de mener la caractérisation physique et perceptive de différentes compositions de trafic routier urbain. La régression multi-niveau a été utilisée pour calculer la gêne, en considérant 1) des facteurs acoustiques influents à l’aide de combinaisons pertinentes d’indices et 2) un facteur non acoustique : la sensibilité au bruit. Dans les villes, le bruit routier est souvent entendu en situation de multi-exposition avec d’autres bruits. Dans le cadre de ces travaux de thèse, les situations de multi-exposition aux bruits routier et d’avion ont été étudiées. Pour cela, un travail semblable à celui mené pour le bruit de trafic routier urbain a été mené pour le bruit d’avion conduisant également à des combinaisons pertinentes d’indices. En vue de caractériser les gênes dues aux bruits de trafic routier et d’avion pour des situations de multi-exposition sonore, les données des précédentes expériences ainsi que celles d’une expérience conduite en situation de multi-exposition à ces bruits combinés ont été utilisées au travers d’une régression multi-niveau adaptée, comme cela a pu être mené dans la littérature. La régression multi-niveau a ainsi permis la proposition de modèles de gêne pour chaque source de bruit. Puis, la gêne totale due à des situations de multi-exposition à ces bruits a été étudiée, afin de mettre en évidence les phénomènes perceptifs mis en jeu. Des modèles de gêne totale ont été proposés, en utilisant les modèles de gêne due à chaque source. Enfin, les modèles de gêne obtenus pour chaque source et les modèles de gêne totale ont été confrontés aux données d’une enquête socio-acoustique. A cet effet, une méthodologie a été proposée afin d’estimer les différents indices des modèles à partir des valeurs du Lden, issues de cartes de bruit et utilisées pour définir l’exposition au bruit des personnes enquêtées. Cette confrontation a montré que les modèles proposés à partir d’expériences menées en laboratoire et couplés à la méthodologie d’estimation des indices à partir des valeurs du Lden permettent une bonne prédiction de la gêne in situRoad traffic noise, and in particular powered two-wheeler noise, constitute an important source of noise annoyance. In order to estimate the noise exposure in cities of more than 100 000 inhabitants, the European directive 2002/49/EC requires the elaboration of strategic noise maps, based on the Lden index. This index is also used in exposureresponse relationships, to predict the percentages of annoyed people, by road traffic noise for example. By coupling strategic noise maps and these exposure-response relationships, noise annoyance maps could be established. The relevance of this index to predict noise annoyance in cities is however often questioned, since many influential acoustical factors (e.g. spectral and temporal features) are not considered by this index. The aim of this thesis is to enhance the characterization of noise annoyance due to different compositions of urban road traffic including powered two-wheelers. To achieve this goal, experiments were carried out under controlled conditions. A first study concerned the influence of several acoustical features related to quiet periods and vehicle pass-by noises on the annoyance due to urban road traffic noise. This study demonstrated the influence of the presence of quiet periods and of the number of vehicles within the urban road traffic and to the absence of the influence of the order of the vehicle pass-by noises, the position and duration of quiet periods. These results were used to carry out the physical and perceptual characterization of different compositions of urban road traffic noise. Multilevel regression was used to calculate noise annoyance, by coupling combinations of indices relating to influential acoustical features and an individual factor: noise sensitivity. In cities, road traffic noise is often combined with other noises. In the framework of this thesis, noise exposure to road traffic noise combined with aircraft noise was studied. Therefore, the same work as the one performed for urban road traffic noise was carried out for aircraft noise, leading also to relevant combinations of noise indices. In order to characterize annoyances due to road traffic noise and to aircraft noise in a combined exposure situation, data from the previous experiments and from an experiment dealing with these combined noises were used through an appropriate multilevel regression, as done in literature. The regression allows annoyance models for each noise source to be proposed. Then, total annoyance due to combined noises was studied, in order to highlight the perceptual phenomena related to the combined exposure. Total noise annoyance models were proposed, using proposed annoyance model of each noise source. Finally, these single source annoyance models and total annoyance models were tested using data of a socio-acoustic survey. To do this, a methodology has been proposed to estimate the different indices involved in the annoyance models, from the Lden values obtained from the strategic noise maps and used to define the noise exposure of the respondents. This confrontation showed that the models proposed on the basis of experiments carried out under laboratory conditions and coupled with a methodology of estimation of the noise indices from Lden values, enabled a good prediction of in situ annoyance
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Seabi, Joseph Mahlakane. "Chronic aircraft noise exposure effects on children's learning and development." Thesis, 2014. http://hdl.handle.net/10539/15850.
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A PhD Thesis Submitted to the Faculty of Humanities,
For the Degree of Doctor of Philosophy
University of the Witwatersrand, Johannesburg,
2014The effects of exposure to environmental noise on individuals’ functioning have been researched extensively in recent times. However, most of this research has focused on adults who, unlike children, have the cognitive capacity to anticipate and cope with noisy environments. This research was based largely on laboratory studies that lacked ecological validity thus avoiding the implications of long-term, real-life exposure to noise. The increasing exposure of people (currently over 80 million people) to unacceptable levels of aircraft noise worldwide gives rise to crucial questions such as the long-term effects of exposure to aircraft noise on children’s reading comprehension, health and annoyance reactions and how children cope with exposure to noise. The objectives of this epidemiological study were to investigate the effects of chronic exposure to aircraft noise on primary school children’s reading comprehension; to determine whether their learning was affected by noise; to uncover how these children coped with exposure to noise; to determine whether they were annoyed by exposure to noise; and to evaluate their subjective perceptions of whether exposure to noise impacted negatively on their health. The primary objective was to evaluate the children’s reactions to the above factors after the relocation of an international airport to another area in order to determine whether the cessation of exposure to noise resulted in improved performance and functioning. This thesis is based on the publication of four scholarly articles that deal with the need for empirical research in an emerging field as well as the need for public education and the advocacy of a worthwhile form of environmental health. Children living in the vicinity of an international airport (noisy group) and those living in quieter areas, who matched the noisy group in terms of socio-economic status and language spoken at home, were recruited for the research. This yielded a cohort of 732 children with a mean age of 11.1 who participated in baseline measurements in 2009 as well as cohorts of 649 (mean age = 12.3) and 174 (mean age = 13.1) children. These children were reassessed after the closure and relocation of the airport for two subsequent years. The findings revealed that, unlike their peers from quieter backgrounds, the children exposed to aircraft noise reported that the noise significantly interfered with their learning and social activities at school, and they continued to report more interference than their counterparts despite the relocation of the airport. These findings were validated by the results of the objective measurement of reading comprehension, which showed that these children performed poorly in comparison to their peers. The children exposed to aircraft noise also reported higher levels of annoyance in all the waves of the study (from 2009 to 2011), and they continued to use more coping strategies following the relocation of the airport than the children from quieter environments. However, the findings revealed no significant impact of the noise on the children’s health. Taken together, these findings suggest that chronic exposure to aircraft noise may have a significant and detrimental impact on children’s learning and level of annoyance but not on their subjective health ratings. This was one of the first longitudinal studies of this nature on the African continent. Keywords: Aircraft Noise; Reading Comprehension; Annoyance; Coping; Health.
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Liu, Yu-Hsiang, and 劉宇翔. "Skin barrier function alteration induced by noise and organic solvent exposure among aircraft maintenance workers." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35410366954576805823.
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碩士中國醫藥大學
環境醫學研究所碩士班
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Skin barrier function is associated with skin health, skin absorption, and skin diseases. In modern occupations, stress has been an important health issue among workers. Previous studies have postulated that psychological stress increases the cortisol level, and induces the skin barrier function perturbation. Noise, a common factor associated with stress in occupation environment, has been demonstrated as a risk factor affecting hormone level. However, limited studies have focused on the relationship between skin barrier function and noise exposure at work. Aircraft maintenance workers constantly expose to high noise and organic solvents, such as n-hexane and methyl ethyl ketone (MEK) at work. Previous studiesalso have demonstrated that organic solvent exposure may induce the damage of skin barrier function. To our knowledge, limited research has investgated the skin barrier disruption after long-term exposure to n-hexane and MEK among aircraft maintenance workers. The objective of this study is to investigate the skin barrier function alteration associated with noise and/or organic solvent exposure. In addition, we explored the levels of cortisol, epinephrine and nor-epinephrine and the potential mechanism of skin barrier function damage caused by noise. After visiting occupational settings in central Taiwan, a total of 44 aircraft maintenance workers were recruited to this study. We defined all study subjects into four types of study group, including noise exposure only, solvent exposure only, simultaneously exposure to noise and solvent, and control group. Blood specimens and questionnaires were collected. We measured the hormone level and confounding factors for workers. Skin barrier function index, such as transepidermal water loss (TEWL) and skin recovery were measured to estimate the barrier disruption. The relationship between environmental exposure, skin barrier function, and hormone level were estimated after the information had collected. Comparisons between noise group and control group showed that noise changed the barrier integrity and induced the alteration of 3, 6 and 24 hours recovery. After controlling the affecting factors, the basal TEWL was elevatated after organic solvent exposure, and there was a change in barrier integrity and a perturbation of 6h recovery caused by noise exposure. Moreover, there was an interaction because of the co-exposure of noise and solvent. After the further controling for solvent effect, noise caused the damage of 6h recovery, and the co-exposure of noise and solvent altered the mechanism between noise and 6h recovery. The results of hormone analysis postulated that noise caused a remarkable increase in nor-epinephrine, which showed the positive trend with barrier integrity and negative trend with 6h recovery. In summary, noise can cause the change of barrier integrity by stratum corneum thickening and induce the alteration of barrier recovery. The increase of hormone (ex: nor-epinephrine) levels induced by noise exposure might be the potential mechanism leading to barrier alteration. Organic solvents can cause the damage of basal TEWL and affect the potential mechanism between noise and skin barrier recovery.
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Maynard, Isla. "A developmental study of the effects of aircraft noise exposure on primary school learners' reading comprehension." Thesis, 2014.
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Considerable research has been conducted regarding the impact of aircraft noise on children’s cognitive performance. Little has been carried out in developing countries however, particularly on the African continent. This study, which was conducted over a three year period, aimed to determine whether the reading comprehension of primary school learners in South Africa was affected by exposure to aircraft noise. The sample comprised 737 learners aged between 8-14 years (mean age = 11.3) in 2009; 650 learners aged between 11-15 years (mean age = 12.3) in 2010; and 178 learners aged between 12-16 years (mean age = 13.1) in 2011. The reading comprehensions of participants from two public schools in KwaZulu Natal in a high aircraft noise area (16h outdoor Leq> 63dBA) were compared with those of participants attending three matched public schools exposed to lower levels of aircraft noise (16h outdoor Leq <56). Reading comprehension was assessed through the use of the Suffolk Reading Scale 2 (SRS2), which was group administered. A univariate General Linear Model was used to investigate the effects of aircraft noise exposure, language and socio-economic status on reading comprehension, while observing for the possible impact of gender and noise sensitivity on the results. The first question aimed to establish whether aircraft noise negatively affects learners’ reading comprehension. The results showed no significant differences between the experimental and control group (F713=0.33, P=<0.8651). The second question sought to determine whether the removal of aircraft noise would lead to improved reading comprehension scores. No significant difference (P>0.05) was observed in interactions between time and the experimental and control groups, in relation to reading comprehension. Establishing whether having a different language to English as one’s home language negatively affects reading comprehension, was the third question that was explored. Significant differences were observed between English first language speakers and English additional language speakers in the favour of the former (F713=19.97, P<.001). The final research question looked at whether low socio-economic status negatively affects reading comprehension performance. The results showed no statistical difference regarding the impact of a low socio-economic status on reading comprehension (F713=1.69, P>0.197). The overall results of this study suggest that chronic noise exposure does not affect children’s reading comprehension, but that language plays a large role in reading comprehension performance. Furthermore, it would indicate that the removal of aircraft noise does not result in improved performance on reading comprehension.
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Kuan, Tsung-min, and 關宗敏. "Exposure Assessment Studies of Noise and SuspendedParticulate in Aircraft Maintenance Factory of PingtungAir Force Logistics Units." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39427879050963492095.
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碩士大仁科技大學
環境管理研究所
100
In order to investigate the exposing extent of noise and air suspended particulates from operators in the aircraft maintenance workplace, this study chose four maintenance workplaces for test site in Pingtung air force base. On the noise exposure test, we chose three places like aircraft and engine ground performance test site and aircraft structure rivet repair area of aircraft maintenance factory to proceed the test and calculation on noise peak, dose, time weighted average sound level and noise permissible exposure time. On the air suspended particulates test, we chose aircraft dry Plastic Media Blasting (PMB) factory to make fixed-point test and compare on five particles size concentration of air suspended particulates like PM0-1, PM1-2.5, PM2.5-7, PM7-10 and PM10-∞ when work from beginning to end. The noise results show that the maximum noise peak level of aircraft and engine ground performance test is up to 139.5dBA, and it close to the laws of regulations on the impact noise can not exceed 140dBA. The time weighted average sound level are 117 and 128.1dBA, and it more than the laws of regulations on continuity noise can not exceed 115dBA. To compare with the engine ground performance test site, the time weighted average sound level in the hush control room can be controlled below the 85.4dBA. The maximum noise peak level in the aircraft structure rivet repair area is 132dBA, and the time weighted average sound level is 89.7dBA. After work in the aircraft PMB factory internal workplace, the PM10, TSP concentration measurement results are 11455.8±2011.64μg/m3 and 21454.8±2011.64μg/m3, and the both results exceed the internal dust allowance concentration standard regulations PM10 (5000μg/m3) and TSP (10000 μg/m3 ) in Taiwan. The PM2.5 highest concentration test results when air suspended particulates pass through the felt type filters of the gate outside is 37.16μg/m3 and more than outdoor air quality standard regulation PM2.5 (35μg/m3) in Taiwan. The PM10 average concentration which is measured IV inside the dust collection device is 1953.8±199.04μg/m3, and it all exceed the suggestion of international inside air quality. The PM2.5, PM10 and TSP concentration which are measured outside the dust collection room are 75.6±32.63μg/m3, 979±220.16μg/m3, 1621.6±344.46 μg/m3, and the three results exceed the regulation of outside air quality in Taiwan. Besides, the study also found that the dust collection efficiency of PM2.5-∞ air suspended particulates from the felt type filter dust collection device on the factory gate and cyclone separator dust collection device are above 99.9% and 83.6% , and PM0-2.5 dust collection efficiency are 95% and 68.4%. These results show that the noise and the air suspended particulates from the test site would make health hazard to operators, so we suggest the aircraft maintenance unit should strengthen on noise protective device and dust collection efficiency engineering control of the air suspended particulate, and proceed the measures like A. Make sure all operators to wear a qualified good protective equipment; B. Proceed annual special health check; C. Strengthen the job-related operator safety and health training; D. Shape the organization''s health and safety to culture and environment.
Books on the topic "Aircraft noise exposure"
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Attenborough, K. Aircraft noise propagation, exposure & reduction. London: Spon Press, 2011.
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Hubbard, Harvey H. Comparisons of methods for predicting community annoyance due to sonic booms. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.
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Aircraft Noise Propagation, Exposure & Reduction. Taylor & Francis, 2009.
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Validation of aircraft noise models at lower levels of exposure. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.
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A, Page Juliet, and Langley Research Center, eds. Validation of aircraft noise models at lower levels of exposure. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.
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Center, Langley Research, ed. Noise exposure reduction of advanced high-lift systems. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1995.
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E, Robert William, Langley Research Center, and United States. National Aeronautics and Space Administration., eds. Attitudinal responses to changes in noise exposure in residential communities. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.
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R, Wilson Mark, and United States. National Aeronautics and Space Administration., eds. The effects of linear microphone array changes on computed sound exposure level footprints. [Washington, D.C: National Aeronautics and Space Administration, 1997.
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R, Wilson Mark, and United States. National Aeronautics and Space Administration., eds. The effects of linear microphone array changes on computed sound exposure level footprints. [Washington, D.C: National Aeronautics and Space Administration, 1997.
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P, Shepherd Kevin, and Langley Research Center, eds. Comparisons of methods for predicting community annoyance due to sonic booms. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.
Find full textBook chapters on the topic "Aircraft noise exposure"
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Zaporozhets, Oleksandr. "Balanced Approach to Aircraft Noise Management." In Aviation Noise Impact Management, 29–56. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91194-2_3.
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AbstractICAO Balanced Approach (BA) to aircraft noise management in airports is reviewed in accordance with historical and technological challenges. All four basic elements of the BA are subject to noise exposure control with dominant emphasis on reduction of noise at source and compatible land usage inside the noise zoning around the airports. Noise abatement procedures and flight restrictions are used at any airport due to its specific issues and should be implemented on a basis of cost–benefit analysis. Noise exposure reduction is an intermediate goal, a final goal—to reduce noise impact, which is mostly represented by population annoyance as a reaction to noise exposure, is discussed also.
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Benz, Sarah, Julia Kuhlmann, Sonja Jeram, Susanne Bartels, Barbara Ohlenforst, and Dirk Schreckenberg. "Impact of Aircraft Noise on Health." In Aviation Noise Impact Management, 173–95. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91194-2_7.
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AbstractAircraft noise exposure is an environmental stressor and has been linked to various adverse health outcomes, such as annoyance, sleep disturbance, and cardiovascular diseases. Aircraft noise can trigger both psychological (annoyance and disturbance) and physiological stress responses (e.g. activation of the cardiovascular system and release of stress hormones). People are usually able to deal with this kind of stressor. However, a constant exposure to aircraft noise can cause a continuous state of stress. This in turn can constrain a person’s ability to regenerate and restore its resources to cope with the noise situation. As a consequence, the risk for certain negative health outcomes can be increased. Within the ANIMA project, literature reviews on the effects of aircraft noise on health outcomes have been performed. This chapter gives an overview of the relevant health outcomes affected by aircraft noise and summarises the results of different reviews and studies on these outcomes. Additionally, the underlying mechanisms of how noise impacts health are explained for daytime as well as night-time aircraft noise exposure (i.e. while sleeping). Further, the relevance of considering not only the general population, but vulnerable groups as well (such as children and elderly people) is described. Lastly, open questions for further studies are presented and discussed.
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Bartels, Susanne, Isabelle Richard, Barbara Ohlenforst, Sonja Jeram, Julia Kuhlmann, Sarah Benz, Dominik Hauptvogel, and Dirk Schreckenberg. "Coping with Aviation Noise: Non-Acoustic Factors Influencing Annoyance and Sleep Disturbance from Noise." In Aviation Noise Impact Management, 197–218. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91194-2_8.
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AbstractAnnoyance and sleep disturbances due to aircraft noise represent a major burden of disease. They are considered as health effects as well as part of the causal pathway from exposure to long-term effects such as cardiovascular and metabolic diseases as well as mental disorders (e.g. depression). Both annoyance and sleep disturbance are not only determined by the noise exposure, but also to a considerable extent by non-acoustic factors. This chapter summarises the most relevant non-acoustic factors and briefly explains their mechanisms on annoyance and sleep as well as the potential to address these factors via intervention methods aiming at the reduction of adverse noise outcomes and an increase in the quality of life of airport residents. Here, the focus is on airport management measures that are considered to help improve the residents’ coping capacity. Findings from the ANIMA case studies with regard to main aspects of quality of life in airport residents around European airports are briefly reported and recommendations for a community-oriented airport management are derived.
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Marth, E., E. Gallasch, G. F. Fueger, and J. R. Möse. "Changes of Biochemical Parameterts Following Short-Term Exposure to Aircraft-Noise." In Environmental Hygiene, 144–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73766-4_31.
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Athirah, B., and M. S. Nurul Shahida. "Aircraft Noise Exposure and Effects on the Health of Nearby Residents: A Review." In Human-Centered Technology for a Better Tomorrow, 361–78. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4115-2_29.
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Heyes, G., D. Hauptvogel, S. Benz, D. Schreckenberg, P. Hooper, and R. Aalmoes. "Engaging Communities in the Hard Quest for Consensus." In Aviation Noise Impact Management, 219–39. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91194-2_9.
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AbstractMistrust, negative attitudes and the expectation of not having any voice against airport authorities can considerably impact on the perception of aircraft noise exposure, lead to increased annoyance and can even influence sleep quality of the noise affected residents. As a result, quality of life can reasonably be assumed to be reduced. This chapter focuses on measures to engage airport communities in aviation-related decision making by improving the information and communication of airports in order to enhance residents’ ‘competence’ and also trust in the airport noise authorities. The role of non-acoustical factors, including aviation-related media coverage in this process, is discussed and results from a media coverage analysis conducted in the ANIMA project are presented. Based on research on perceived fairness in communication, recommendations are given as to how to communicate and engage residents with the aim of building a neighbourly relationship between airport authorities and residents on an even footing and, thus, enable an improved exchange leading to deeper understanding and comprehension by both parties. Results from the ANIMA review on airport management strategies (including communication and engagement aspects) of several European airports are presented and conclusions are drawn about what characterises good (or bad) communication and community engagement strategies for the purpose of a neighbourly relationship between the airport and its residents.
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Sørensen, Mette, and Thomas Münzel. "Epidemiology of traffic noise and cardiometabolic disease." In ESC CardioMed, edited by Thomas Münzel, 3105–7. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0751.
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Epidemiological research into the health effects of transportation noise has during the last decades focused on investigating effects on the cardiovascular system. These studies have consistently shown that exposure to road traffic and aircraft noise is associated with elevated blood pressure, prevalent arterial hypertension, as well as a higher risk of ischaemic heart disease. Moreover, recent studies have found exposure to road traffic and aircraft noise to be associated with a higher risk for stroke, and possibly atrial fibrillation. Lastly, new studies point towards transportation noise as a risk factor for metabolic disease, showing an association with obesity and development of diabetes. This chapter examines the epidemiological studies within this research area, with a focus on describing the level of evidence for each outcome, the size of the associations, and research gaps.
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Mostafa, Asif. "Safety and Risk Assessment of Civil Aircraft during Operation." In Safety and Risk Assessment of Civil Aircraft during Operation. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93326.
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Risk and safety are always considered to be the most critical operational characteristics of civil aircraft. Typically, they relate to the possible occurrence of air traffic collisions that could result in loss of life, damage to infrastructure, and damage to property by third parties. Consequently, in addition to other adverse effects such as noise, air pollution, they were deemed externalities. Risk and protection became topics of continuous study, ranging from purely technical/technological aspects to explicitly administrative ones, due to their inherent very high importance. Such concerns require the establishment of appropriate regulations regarding designs and operations of device technology. In order assess the risk, there are several methods which include: identification of safety concerns, analysis of the risk factors likelihood, analysis of the risk factors severity, and assessment and the admissibility of risk factors. And finally, reducing of the risk should be performed by three general strategies which are: avoidance of the risk, reduction of risk, and isolation of the exposure. These strategies are implemented based on efficiency, technical measures, controlled measures, staffing measures, cost/benefit, practicality, acceptability of each party, durability, residual risk factor for flights safety, and new challenges. With the advancement of technology, new methods of risk deduction and safety concerns are being developed to ensure safe and risk-free flight operation.
Conference papers on the topic "Aircraft noise exposure"
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Di, Guoqing, Bing Zhou, and Qili Lin. "Aircraft Noise Exposure Affects Rat Behavior and Serum Neurotransmitter Expression." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5660884.
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Amargianitakis, Daniel C., Rod Self, Anderson Proenca, Antonio Torija Martinez, and Athanasios Synodinos. "Generation of noise exposure contours for eVTOL aircraft including transition." In 28th AIAA/CEAS Aeroacoustics 2022 Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-3088.
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Revoredo, Teo, Jules Slamma, Karim Achaibou, and Felix Mora-Camino. "Aircraft Noise Exposure around Airports A Differential Flat Approach for Trajectory Assessment." In AIAA Guidance, Navigation, and Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-8286.
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Mercure, Robert A. "Propulsion System Considerations for Future Supersonic Transports: A Global Perspective." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-245.
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With research and technology (R&T) development activities for the next generation SuperSonic Transport (SST) being pursued globally over the past few years, the options to proposed airframe and engine concepts appears to be converging. The United States, the Europeans, and the Japanese are all engaged in developing the technologies needed for a future SST that is environmentally compatible and economically practical. Boeing and McDonnell Douglas are part of the team under an R&T contract with the National Aeronautics and Space Administration to develop critical components and enabling materials that will allow industry to make a production decision by 2003. Europe’s three main aircraft manufacturer’s — i.e., Aerospatiale, British Aero-space, and Deutsche Aerospace — comprise the European Supersonic Research Program (ESRP). A primary Japanese effort called the Hypersonic Transport Propulsion System Research (HYPR) project consists of a consortium of four international engine manufacturers and the National Japanese Laboratory. The manufacturers are: Ishikawajima-Harima Heavy Industries Co. Ltd., the Kawasaki Heavy Industries Co. Ltd., Mitsubishi Heavy Industries Co. Ltd., and General Electric Aircraft Engines Company, USA. A recent study by the Japan Aircraft Development Corporation (Reference 1) also addressed the technology requirements for the next generation SST. There are basically three major challenges that must be met before a new SST can become a reality. They are the technical, environmental, and economic challenges. The technical challenges of the propulsion system primarily reduce the development of new materials capable of sustaining higher temperatures and vibration (high and low frequency) over longer exposure times as well as capable of being produced at reasonable costs. Low emission combustors and low exhaust jet noise are the primary environmental challenges, which are a technical challenge in themselves. The economic challenge is to produce an aircraft and propulsion system that allows the manufacturers to recover development and manufacturing costs as well as realize a reasonable Return-On-Investment (ROI). In addition, Life Cycle Costs (LCC) must not be substantially above future subsonic airliners in order to justify premium fares the public would be willing to pay for the time savings of long-distance flights and still be profitable to the airlines.
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Khobaib, Mohammad, Jochen Hoffmann, Shamachary Sathish, and Michael S. Donley. "Study of Corrosion Damage Under Protective Coatings." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/nde-25818.
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Abstract Polymer coatings provide an excellent corrosion barrier for Al-skinned military aircraft. However, the degradation and damage of the coatings in their service life over time leads to the initiation of corrosion damage at the substrate level. Early detection and negation of such activity can provide extensive cost savings. Several Electrochemical techniques and Non Destructive Evaluation (NDE) show promise in detecting the onset of corrosion under such coatings. Current accelerated testing of aircraft coating systems for corrosion protection relies heavily on salt spray methods. Electrochemical techniques such as Electrochemical Impedance Spectroscopy (EIS) and Electrochemical Noise Methods (ENM) provide insight into the global properties of a coating system, and both techniques are being used on a limited basis. However, there is a need to investigate corrosion events with greater spatial resolution under coatings at the metal/coating interface. Such corrosion activity may be related to coating defects and variations in the surface chemistry of the underlying metal. The Scanning Vibrating Electrode Technique (SVET) has been developed to allow the investigation of localized corrosion activity with high spatial resolution. Such activity may be associated with coating defects or galvanic coupled regions of the metal surface. Electrochemical and NDE techniques were used to investigate the early stage of corrosion activity under protective coatings. Coatings in this investigation ranged from a simple epoxy amine to commercially used military aircraft polyurethane coatings. SVET testing of panels with intact high-resistance barrier coatings could not reveal corrosion damage under normal testing conditions because of little or no corrosion activity within the limited exposure time. Chemical, mechanical, and electrochemical means of accelerating the corrosion damage were utilized to obtain results in a reasonable time frame. Corrosion initiation and its progress under the coating were studied in detail and the results are discussed here. Complimentary high-resolution NDE techniques, such as Scanning Acoustic Microscopy (SAM) and Fan Thermography measurements were used to identify the corrosion sites. The overall objective of this investigation is to establish a correlation between the electrochemical and NDE techniques.
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Mir-Haidari, Seyed-Ehsan, and Kamran Behdinan. "Aero-Engine Vibration Propagation Analysis Using Bond Graph Transfer Path Analysis and Transmissibility Theory." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10773.
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Abstract In recent times, due to the increase in global energy commodities prices, aero-engine manufacturers are investing in advanced aero-engine technologies to reduce the operating costs. These innovative technologies include overall weight reductions to develop efficient aero-engines. Due to these circumstances, the overall exposure of the aero-engine to vibration transfer due to various loading conditions such as the rotor loading forces has significantly increased. Due to advancement in technologies and demand for greater passenger comfort, vibration transfer reduction to the aircraft fuselage has received prominent attention. In this paper, an analytical transmissibility study called the bond graph Transfer Path Analysis (TPA) has been extensively studied and its applications are explored. Bond Graph TPA is a reliable and feasible theoretical methodology that can be implemented on various large mechanical systems in the design stages to tackle noise and vibration problems before prototyping to significantly reduce the development costs. Bond graph transfer path analysis (TPA) is an advantageous method compared to the existing empirical TPA methodologies such as the Operational Path Analysis due to its efficient analytical nature. In this paper, bond graph TPA has been implemented on a reduced aero-engine model to determine vibration contribution at various aero-engine locations to propose structural design guidelines to minimize the vibration transfer.
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Gurka, Martin, Sebastian Nissle, Moritz Hübler, and Max Kaiser. "Active Vortex Generator Deployed on Demand by Active Hybrid Composites From Shape Memory Alloys and Fiber Reinforced Polymers." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3727.
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High performance airfoils with laminar airflow exhibit minimum drag and maximum lift, but tend to sudden stall due to flow separation at low air speed. This requires an increased approach speed of the aircraft, resulting in less steep approaches and a higher noise exposure of the surroundings. New active vortex generators, deployed only on demand at low speed, energizing the boundary layer of air flow and reducing flow separation, can help to overcome this critical situation. Active hybrid composites, combining the actuation capability of shape memory alloys (SMA) with the possibility of tailoring the compliance of fiber reinforced polymers (FRP) on the materials level, provide an active aerodynamic system with high lightweight potential and small space requirements. Being one of the first applications of active hybrid structures from SMA and FRP we will demonstrate the potential of this new technology with an integrated system of active vortex generators for a glider. In this contribution we present - the design process, based on a FE-model and careful characterization of the actuating SMA and the composite material - manufacturing relevant aspects for reliable series production - the testing of single vortex generators in lab scale under aerodynamic load - and an overview of the whole system.
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Sabitova, M. M., Z. M. Berkheeva, and A. V. Shulaev. "DYNAMICS AND FEATURES OF THE FORMATION OF REGIONAL PROFESSIONAL INCIDENCE." In The 16th «OCCUPATION and HEALTH» Russian National Congress with International Participation (OHRNC-2021). FSBSI “IRIOH”, 2021. http://dx.doi.org/10.31089/978-5-6042929-2-1-2021-1-459-463.
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Abstract. Working conditions have a significant impact on the health of the working population. In the Republic of Tatarstan (RT), there are still industries where unsatisfactory working conditions lead to a high risk of developing occupational diseases. The aim of the work was to assess the occupational morbidity (DI) in the Republic of Tatarstan of the structure, dynamics, main reasons and factors affecting its formation. The aim of the work was to assess the occupational morbidity (DI) in the Republic of Tatarstan of the structure, dynamics, main reasons and factors affecting its formation. The analysis was carried out on the basis of data from the Office of Rospotrebnadzor in the Republic of Tatarstan, the Center for Occupational Pathology, and Tatarstanstat. Results: The proportion of workers employed in harmful and (or) hazardous working conditions in the Republic of Tatarstan amounted to 47.9% -50.8% of the payroll number of the working population. PP indicators in the Republic of Tatarstan over the past 10 years are 1.39 - 1.88 per 10 thousand employees. The highest levels of PZ are recorded among agricultural workers - from 5.22 to 10.12 and manufacturing - from 3.46 to 7.41 cases per 10 thousand. The leading places are occupied by diseases associated with exposure to noise and vibration. The main share of the identified occupational diseases was registered in workers of working age (50-59 years) with over 30 years of work experience. Conclusion. During the analyzed period, the PP indicators in the Republic of Tajikistan remained higher or at the level of the PP in the Russian Federation (RF). The main share of occupational diseases was registered at aircraft and mechanical engineering enterprises. We associate the observed increase in the proportion of diseases with the loss of professional ability to work with the untimely referral of patients for examination, as well as their late appeal to the center of occupational pathology.
Reports on the topic "Aircraft noise exposure"
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Evaluation of metal and noise exposures at an aircraft powerplant parts manufacturer. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, April 2019. http://dx.doi.org/10.26616/nioshhhe201800013349.
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