Готові списки джерел за темами / Sound insulation of the room

Добірка наукової літератури з теми "Sound insulation of the room"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Sound insulation of the room"

1

Wei, Shang You, Xian Feng Huang, Zhi Xiang Zhuang, and Jun Xin Lan. "Research on the Prediction of Impact Sound Insulation to a Homogeneous Wall." Applied Mechanics and Materials 744-746 (March 2015): 1593–96. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.1593.

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Анотація:
In this paper, a theoretical model to evaluate impact sound transmission through a homogeneous wall is proposed. The model which is based on the Statistical Energy Analysis framework exhibits a system with room-wall-room. For the purpose to explore the mechanism of impact sound transmission through a wall, the impact sound reduction index between two rooms are predicted. Meanwhile, the variation of impact sound reduction index with the walls properties are also taken into account. The results reveal that the density, elastic modulus and thickness of a homogeneous wall have diverse effects on its impact sound insulation and can be chosen adequately to achieve ideal insulation values.It provides an approach to optimize impact sound insulating properties of the walls.
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2

Obadiah, Jason. "FIELD MEASUREMENT OF AIRBORNE SOUND INSULATION BETWEEN ROOMS." Ultimart: Jurnal Komunikasi Visual 12, no. 1 (January 7, 2020): 24–33. http://dx.doi.org/10.31937/ultimart.v12i1.1397.

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Анотація:
Airborne sound can be a nuisance and a constant expose to the sound can in- troduced health problems to the people in the area especially areas where quiet environ- ment is a necessity. The objective of this measurement is to demonstrate the field mea- surement of the airborne sound insulation properties of interior walls. The measurement was done for determining the sound insulation properties of a partition between two rooms. This measurement will also determine the parameters and source of the prob- lems which are contributing to the airborne sound from the adjacent room. The results are that the volume of the room and the construction of the room (pipe construction and ceiling, etc.) have large effects to the sound transmitted between the rooms.
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3

Huang, Xian Feng, and Yi Min Lu. "Sound Insulation Inversion to an Attached Room in Buildings." Applied Mechanics and Materials 209-211 (October 2012): 267–71. http://dx.doi.org/10.4028/www.scientific.net/amm.209-211.267.

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Анотація:
With respect to the higher sound insulation need of the buildings, the attached room may be considered to adopt. A calculation model is applied to predict the sound insulation of a specified attached room. Realistic sound insulation inversion, furthermore, is consistent with the procedure of engineering practice. By the artificial immune algorithm (AIA), the inverse sound insulation prediction model is developed, which adjust the insulation of each element (wall, door and window etc.) and sound absorption of the attached room. Under agreeing with the reasonable configuration of an attached building and meeting sound insulation requirement simultaneously, it was found that acoustic properties of each member within a whole attached room were obtained. As a consequence, the material and even the configuration of each wall can also be determined. It will be beneficial to building design.
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4

Rong, Fabing, Zhongjie Cheng, and Peijie Liu. "Study on Sound Insulation Performance of Pressure Relief Wall of Transformer Chamber." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 1 (August 1, 2021): 5197–202. http://dx.doi.org/10.3397/in-2021-3004.

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Анотація:
The problem of noise nuisance in indoor substation becomes more and more sensitive. The noise emission index of substation has become an important technical index of substation design. The noise control of indoor substation mainly adopts "auxiliary noise reduction technology" such as sound absorption, sound insulation and vibration isolation. The sound insulation performance of the pressure relief wall in the main transformer room of indoor substation is the key link of noise control. In order to reduce the noise interference, this paper selects the common sound insulation structure of the pressure relief wall, analyzes the main influencing factors of noise reduction, selects the sound insulation structure suitable for the pressure relief wall in the main transformer room of indoor substation, and tests the effectiveness of noise reduction of the sound insulation structure in the actual case. Based on the research results, the sound absorption structure in the main transformer room is arranged on the other indoor wall outside the pressure relief wall, and the pressure relief wall mainly considers the structure of sound insulation, which can effectively reduce the noise impact of the main transformer room.
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5

Ivanova, Yonka, Todor Partalin, Luben Lakov, and Bojidar Jivov. "Airborne sound insulation of new composite wall structures." MATEC Web of Conferences 145 (2018): 05013. http://dx.doi.org/10.1051/matecconf/201814505013.

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Анотація:
Protection against noise is one of the essential requirements of the European Construction Product directive. In buildings, airborne sound insulation is used to define the acoustical quality between rooms. In order to develop wall structures with optimal sound insulation, an understanding of the physical origins of sound transmission is necessary. To develop a kind of knowledge that is applicable to the improvement of real walls and room barriers is the motive behind this study. The purpose of the work is to study the sound insulation of new composite wall structure.
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6

Granzotto, Nicola, and Edoardo Alessio Piana. "Evaluation Method for Façade Acoustic Insulation for a Corner Room: Discussion on the Results Obtained as a Function of the Source Position." Applied Sciences 10, no. 21 (October 22, 2020): 7434. http://dx.doi.org/10.3390/app10217434.

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Анотація:
The appropriate acoustic insulation project of building façades is of importance for the design of highly comfortable living environments. In some countries, national regulations require maximum noise levels inside rooms, or minimum sound insulation limits, to be respected. The acoustic insulation design of a façade is usually performed according to the ISO 12354-3 standard, which presents a calculation method based on the geometry of the room, the shape of the façade, the areas and the acoustic performances of the individual elements. The prescribed limits must be experimentally verified according to methods derived from international standards. However, the current versions of such standards do not provide details on how to perform the measurements and the calculation of the sound insulation for corner rooms. An important remark is that, depending on the position of the sound source used for the measurements, different results of the standardized sound insulation are obtained. This article proposes a new method for calculating the façade insulation of corner rooms by introducing the acoustic attenuation due to the diffraction of the corner and the distance of the sound source from the façades, estimated through simulations and experimentally validated.
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7

Muhammad, Imran, Anne Heimes, and Michael Vorländer. "Interactive real-time auralization of airborne sound insulation in buildings." Acta Acustica 5 (2021): 19. http://dx.doi.org/10.1051/aacus/2021013.

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Анотація:
Sound insulation auralization can be used as valuable tool to study the perceptual aspects of sound transmission in built environments for assessment of noise effects on people. It may help to further develop guidelines for building constructions. One advanced goal of real-time sound insulation auralization is to appropriately reproduce the condition of noise effects on the human perception and cognitive performance in dynamic and interactive situations. These effects depend on the kind of noise signal (i.e. speech, music, traffic noise, etc.) and on the context. This paper introduces a sound insulation auralization model. The sound insulation filters are constructed for virtual buildings with respect to complex sound propagation effects for indoor and outdoor sound sources. The approach considers the source room sound field with direct and diffuse components along with source directivity and position. The transfer functions are subdivided into patches from the source room to the receiver room, which also covers composite building elements, thus providing more detail to the actual building situations. Furthermore, the receiving room acoustics includes the reverberation of the room based on its mean free path, absorption and binaural transfer functions between its radiating walls elements and the listener. This more exact approach of sound insulation model agrees reasonably well with the ISO standard (i.e. diffuse field theory) under standard settings. It is also shown that the sound field significantly influences the transmitted energies via building elements depending on the directivity and position of the source. The proposed method is validated as a general scheme and includes more details for real-time auralization in specific situations especially in the cases where the simplified diffuse sound field approach fails. It is capable to be used in interactive Virtual Reality (VR) systems, which opens new opportunities for psychoacoustics research in noise effects on human.
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8

Mao, Jian Xi. "Research of Optimization Design on Floating Floor Insulation." Advanced Materials Research 163-167 (December 2010): 2410–14. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2410.

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Анотація:
In order to acquire a high quality of living environment, it is necessary to investigate the subjects of floor impact sound insulation. According to the characteristics of optimization design method and restricted optimization math model, the sound transmission between floor and adjacent room down through floating floor has been modeled in a finite-element method. Floating floor structure are studied to realize the design optimization when the room average sound pressures are selected as objective function. Predicted results show that when keep the whole thickness of floating floor fixed, result of dynamics optimization design can reduce room average sound pressure effectively. And when keep the whole thickness of floating floor unfixed, optimization results have been gotten on the total thickness of floor layer and resilient interlayer of the floating floor, and the average sound-pressure in room is lower than original one availably.
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9

Berardi, Umberto. "A Comparison of Measurement Standard Methods for the Sound Insulation of Building Façades." Building Acoustics 19, no. 4 (December 2012): 267–82. http://dx.doi.org/10.1260/1351-010x.19.4.267.

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Анотація:
This paper focuses on the limits of measurement of the sound insulation of building façades at low frequencies. Three standard methods are compared mainly for the position of the equipment. In particular, the positions proposed by the international standard ISO 140-5 and the national standards ASTM E 966 (USA) and JIS A 1430 (Japan) are considered. The limits of measurement of the sound pressure level in front of the façade are investigated. Different placements of the external source and receiver are considered. Moreover, different placements of the receiver inside small rooms are compared by focusing on corner vs. center room positions. The uncertainties of room averaged sound pressure levels measured according to different standards are discussed. The problems of measurement of the reverberation time in small rooms and of sound insulation in irregular shaped rooms are introduced because these measurements present several critical challenges. Finally, suggestions to improve the future version of the ISO 140-5 are reported.
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10

Jung, Jae-Deok, Suk-Yoon Hong, Jee-Hun Song, and Hyun-Wung Kwon. "Predictions of airborne noise between unit cabins by developing a cavity transfer matrix." Noise Control Engineering Journal 69, no. 3 (May 1, 2021): 229–42. http://dx.doi.org/10.3397/1/376923.

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Анотація:
The unit cabin has been used to construct internal ship space for improved efficiency and to reduce budgetary costs in shipbuilding. Because the cavity is placed between unit cabins, the noise of one room is transmitted through the sound insulating panel, the cavity, and the opposite sound-insulating panel. In this study, by developing a transfer matrix of the cavity between structures, airborne noise between unit cabins was predicted. A sandwich panel, which is usually used in ships, was employed to construct a double panel, and the sound insulation performance was confirmed by changing the thickness of the cavity. To improve the reliability of numerical results, they were compared with those from experiments conducted. The results showed that as the cavity size increases, the overall sound insulation performance improves. A parameter study was also conducted on the density, Young's modulus, thickness, and thickness ratio of the core of the sandwich panel. To improve the sound insulation performance, increasing the density of the core is preferable to increasing the core thickness. The panel thickness ratio should be increased to avoid performance degradation as a result of the resonance frequency.
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Дисертації з теми "Sound insulation of the room"

1

Forsman, Jimmy. "Game engine based auralization of airborne sound insulation." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149498.

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Анотація:
Describing planned acoustic design by single number ratings yields a weak link to the subjective event, especially when the single number ratings are interpreted by others than experienced acousticians. When developing infrastructure, tools for decision making needs to address visual and aural perception. Visual perception can be addressed using game engines and this has enabled the establishment of tools for visualizations of planned constructions in virtual reality. Audio engines accounting for sound propagation in the game engine environment are steadily developing and have recently been made available. The aim of this project is to simulate airborne sound insulation by extending the support of recently developed audio engines directed towards virtual reality applications. The case studied was airborne sound insulation between two adjacent rooms in a building, the sound transmitted to the receiving room through the building structure resulting from sound pressure exciting the structural elements in the adjacent source room into vibration. The receiving room composed modelled space in the game engine Unreal Engine and Steam Audio was the considered audio engine. Sound transmission was modelled by filtering based on calculations of transmission loss via direct and flanking paths using the model included in the standard EN 12354-1. It was verified that the filtering technique for modelling sound transmission reproduced attenuations in correspondence with the predicted transmission loss. Methodology was established to quantify the quality of the audio engine room acoustics simulations. A room acoustics simulation was evaluated by comparing the reverberation time derived from simulation with theoretical predictions and the simulated reverberation time showed fair agreement with Eyring’s formula above its frequency threshold. The quality of the simulation of airborne sound insulation was evaluated relating the sound field in simulation to insulation classification by the standardized level difference. The spectrum of the simulated standardized level difference was compared with the corresponding sound transmission calculation for a modelled scenario. The simulated data displayed noticeable deviations from the transmission calculation, caused by the audio engine room acoustics simulation. However, the simulated data exhibited cancellation of favourable and unfavourable deviations from the transmission calculation resulting in a mean difference across the spectrum below the just noticeable difference of about 1 dB. Single number ratings was compared and the simulated single number rating was within the standard deviation of how the transmission model calculates predictions for a corresponding practical scenario measured in situ. Thus, the simulated data shows potential and comparisons between simulated data, established room acoustics simulation software and in situ measurements should further be made to deduce whether the deviations entails defects in the airborne sound insulation prediction or is an error imposed by the audio engine room acoustics simulation.
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2

Massaglia, J. F. "Modelling the sound insulation of corrugated roof structures : an extended transfer matrix approach." Thesis, University of Salford, 2017. http://usir.salford.ac.uk/43778/.

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Анотація:
Over the course of this work, the transfer matrix method (TMM) was implemented and studied for its potential in predicting the sound insulation characteristics of corrugated dual leaf roof structures. A model of periodically connected plates, using Fourier expansions, was derived independently and extended in this work to include the stiffness of connectors and orthotropic plates, and intermediate beams in the framework of the structure. The same principles were applied in deriving the transmission loss through periodically stiffened plates, as a proxy for corrugated panels. At the same time, corrugated plates were modelled as equivalent orthotropic panels, a process which is compatible with the TMM without particular modifications. Infill materials were modelled using simple fluid representations and more complex poroelastic behaviour. The point-connected plate models were combined with the TMM to enable multiple layers of infill materials between the two plates, by using an effective fluid approach. The stiffness of typical roof connectors was obtained with numerical simulations, and used in predicting transmission loss. Corrections were introduced to simulate diffuse laboratory conditions and enable meaningful comparisons to available data. The limitations of a simple orthotropic plate model compared to laboratory measurements and the ribbed plate model were identified. A number of measurements of dual leaf partitions and full roof systems were compared to the TMM and point-connected plate models, finding typically good agreement at low to mid-frequency, and a strong dependence of high frequency transmission loss on connector stiffness.
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3

Тищенко, Олена Петрівна. "Акустичне облаштування домашнього кінотеатру". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/42428.

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В роботі описується та аналізується інформація що до геометрії на плану приміщення домашнього кінотеатру, умов створення задовільного часу реверберації. Були проаналізовані дві концепції приміщень для домашнього кінотеатру. Заглушене приміщення являє собою приміщення з малим значенням часу реверберації, відповідно, більш детальним підбором звукопоглинаючих матеріалів та високим показником звукоізоляції. Приміщення з акустичним полем залу володіє більшим значенням часу реверберації, задовільним значенням сумарного рівню шуму порівняно з допустим рівнем сумарного шуму у суспільних закладах в нічний час та простим набором звукопоглинальних матеріалів.
The work aims to calculate the acoustic design of a damped room and a room with an acoustic field of the hall, which intended for a home theatre. The paper describes and analyses information on the geometry of the layout of the home theatre room, the conditions for creating a satisfactory reverberation time. Two home theatre room concepts were analyzed. A damped room is a room with a short reverberation time, respectively, a more detailed selection of sound-absorbing materials, and a high rate of sound insulation. The room with the acoustic field of the hall has a high value of the reverberation time, a satisfactory value of the total noise level compared to the admissible level of total noise in public institutions at night, and a simple set of sound-absorbing materials.
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4

Berková, Petra. "Predikce zvukoizolačních vlastností dělicích stavebních konstrukcí a zabezpečení akustické pohody v interiéru budov." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-233798.

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This thesis deals with the properties of soundproof partition structures in the low-frequency sound at impact sound insulation and security of acoustic comfort inside buildings. The prediction of impact sound is a simulation laboratory measurements of impact sound. The work is based on the occurrence of frequent complaints of inhabitants of residential homes for subjectively poor impact sound insulation of horizontal dividing structures, whose top layer is formed laminate. Although these structures conform in terms of impact sound insulation in accordance with the requirements of CSN 73 0532: 2010, residents complain about the subjective perception of the sounds of lower frequencies. A noise with a distinctive character of sound at low frequencies has been proved by measuring the spectral analysis and evaluation of sound pressure levels caused by the movement of persons roof construction to the floor. On the measurement and evaluation carried out in accordance with the measurement and evaluation of noise in non-working environment can be related requirement under the Regulation No. 272/2011 Coll. "On the protection of health from the adverse effects of noise and vibration." Occupational noise limits for protected buildings interior space do not apply to noise from ordinary use of the apartment. Under current legislation, the problem is in the Czech Republic at present insoluble. Therefore, this work explores ways evaluation of impact sound and delivery is determined conclusions. With the low-frequency impact sound insulation is also related to the latter part of this dissertation, where the computing program ANSYS (version 14.0) is simulated laboratory measurements of impact sound insulation of the real structure. The paper presents the results of simulation, and the sound pressure level in the receiving room to třetinooktávového band 630 Hz. These results are compared with measured values modeled in the laboratory.
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5

Novotný, David. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226610.

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The main concern of this thesis work is the five-storey multifunction building. The house will consist of 22 residential units and one barrier-free apartment to which they belong cellar and two establishments. The building will have four above ground and one underground floor.
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6

Kernen, Ulrica. "Airborne sound insulation of floating floors." Licentiate thesis, KTH, Byggnader och installationer, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1036.

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7

Cambridge, Jason Esan. "The Sound Insulation of Cavity Walls." Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7332.

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Lightweight building materials are now commonly employed in many countries in preference to heavyweight materials. This has lead to extensive research into the sound transmission loss of double leaf wall systems. These studies have shown that the wall cavity and sound absorption material placed within the cavity play a crucial role in the sound transmission through these systems. However, the influence of the wall cavity on the sound transmission loss is not fully understood. The purpose of this research is to obtain a comprehensive understanding of the role played by the wall cavity and any associated sound absorption material on the sound transmission loss through double leaf wall systems. The research was justified by the fact that some of the existing prediction models do not agree with some observed experimental trends. Gösele’s theory is expanded and used in the creation of an infinite and finite vibrating strip model in order to acquire the desired understanding. The sound transmission loss, radiated sound pressure and directivity of double leaf systems composed of gypsum boards and glass have been calculated using the developed model. A method for calculating the forced radiation efficiency has also been proposed. Predictions are compared to well established theories and to reported experimental results. This work also provides a physical explanation for the under-prediction of the sound transmission loss in London’s model; explains why Sharp’s model corresponds to Davy’s with a limiting angle of 61° and gives an explanation for Rindel’s directivity and sound transmission loss measurements through double glazed windows. The investigation also revealed that a wide variety of conclusions were obtained by different researchers concerning the role of the cavity and the properties of any associated sound absorption material on the sound transmission loss through double wall systems. Consequently recommendations about the ways in which sound transmission through cavity systems can be improved should always be qualified with regard to the specific frequency range of interest, type of sound absorption material, wall panel and stud characteristics.
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8

Maluski, Sophie. "Low frequencies sound insulation in dwellings." Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/3136/.

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Low frequency noise transmission between dwellings is an increasing problem due to home entertainment systems with enhanced bass responses. The problem is exacerbated since there are not presently available methods of measurement, rating and prediction appropriate for low frequency sound in rooms. A review of the classical theory of sound insulation and room acoustics has shown that both theories are not applicable. In fact, the sound insulation of party walls at low frequencies is strongly dependent on the modal characteristics of the sound fields of the two separated rooms, and of the party wall. Therefore methods originally developed for measurement conditions where the sound field was considered diffuse, may not be appropriate for room configurations with volumes smaller than 50m3 and for frequencies where sound wavelengths are large. An alternative approach is proposed using a Finite Element Method (FEM) to study the sound transmission between rooms. Its reliability depends on the definition of the model, which requires validating measurement. FEM therefore does not replace field or laboratory measurements, but provides complementary parametric surveys not easily obtainable by measurements. The method involves modelling the acoustic field of the two rooms as an Acoustic Finite Element model and the displacement field of the party wall as a Structural Finite Element model. The number of elements for each model was selected by comparing the numerical eigenfrequencies with theoretical values within an acceptable processing time and error. The simulation of a single room and of two coupled rooms, defined by linking the acoustic model with the structural model, were validated by comparing the predicted frequency response with measured response of a 1:4 scale model. The effect of three types of party wall edge condition on sound insulation was investigated: simply supported, clamped, and a combination of clamped and simply supported. It is shown that the frequency trends still can be explained in terms of the classical mechanisms. A thin masonry wall is likely to be mass controlled above 50Hz. A thick wall is stiffness controlled, below 100Hz. A clamped thin wall provides a lower sound insulation than a simply supported, whereas a clamped masonry wall provides greater sound level difference at low frequencies than a simply supported. The sound insulation of masonry walls are shown to be strongly dependent on the acoustical modal characteristics of the connected rooms and of the structural modal characteristics of the party wall. The sound pressure level difference displays a sequence of alternating maxima and minima about a trend, dictated by the properties of the party wall. The sound insulation is lower in equal room than in unequal rooms, whatever the edge conditions and smaller wall areas provide higher sound insulation than large areas. A correction factor is proposed as a function of room configuration and wall area and edge conditions. Attempts to quantify the factor were made using statistical and deterministic analyse, but further work is required.
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9

Sullivan, Rory Daniel. "Sound insulation of brick diaphragm walls." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318231.

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10

Toyoda, Masahiro. "Sound insulation strategies for building constructions." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143996.

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Анотація:
Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第12306号
工博第2635号
新制||工||1372(附属図書館)
24142
UT51-2006-J298
京都大学大学院工学研究科都市環境工学専攻
(主査)教授 髙橋 大弐, 教授 鉾井 修一, 助教授 伊勢 史郎
学位規則第4条第1項該当
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Книги з теми "Sound insulation of the room"

1

Rindel, Jens Holger. Sound Insulation in Buildings. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206.

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2

Parmanen, Juhani. Sound insulation of multi-storey houses: Summary of impact sound insulation. Espoo, Finland: VTT, Technical Research Centre of Finland, 1999.

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3

Payne, Michael K. Guidelines for airport sound insulation programs. Washington, D.C: Transportation Research Board, 2013.

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4

Payne, Michael K., Rita A. Smith, Deborah Murphy Lagos, Jack Freytag, Mark Culverson, Jean Lesicka, James Leana, Robert R. Smith, A. Vernon Woodworth, and Robert Valerio. Guidelines for Airport Sound Insulation Programs. Washington, D.C.: Transportation Research Board, 2013. http://dx.doi.org/10.17226/22519.

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5

National Society for Clean Air. Noise Committee. Report on sound insulation in flat conversions. Brighton: National Society for Clean Air, 1987.

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6

Mommertz, Eckard. Acoustics and sound insulation: Principles, planning, examples. Basel: Birkhäuser/Edition Detail, 2009.

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7

Acoustics and sound insulation: Principles, planning, examples. Basel: Birkhäuser/Edition Detail, 2009.

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8

Room acoustics. 3rd ed. London: Elsevier Applied Science, 1991.

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Kuttruff, Heinrich. Room acoustics. 4th ed. London, [England]: Spon Press, 2000.

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Room acoustics. 5th ed. London & New York: Taylor & Francis, 2009.

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Частини книг з теми "Sound insulation of the room"

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Rindel, Jens Holger. "Introduction to room acoustics." In Sound Insulation in Buildings, 69–100. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-5.

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Kuttruff, Heinrich. "Sound absorption and sound absorbers." In Room Acoustics, 125–56. Sixth edition. | Boca Raton : CRC Press, [2017]: CRC Press, 2016. http://dx.doi.org/10.1201/9781315372150-6.

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Rindel, Jens Holger. "Impact sound insulation." In Sound Insulation in Buildings, 275–312. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-11.

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Mechel, Fridolin. "Sound Sources." In Room Acoustical Fields, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22356-3_1.

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McMullan, Randall. "Noise and Sound Insulation." In Environmental Science in Building, 182–215. London: Macmillan Education UK, 2017. http://dx.doi.org/10.1057/978-1-137-60545-0_9.

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Rindel, Jens Holger. "Introduction to sound insulation." In Sound Insulation in Buildings, 101–54. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-6.

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Gösele, K., and E. Schröder. "Sound Insulation in Buildings." In Handbook of Engineering Acoustics, 137–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-69460-1_7.

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Tohyama, Mikio. "Room Transfer Function." In Sound and Signals, 243–304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20122-6_13.

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Rindel, Jens Holger. "Sound radiation from plates." In Sound Insulation in Buildings, 155–88. Boca Raton : CRC Press, [2018]: CRC Press, 2017. http://dx.doi.org/10.1201/9781351228206-7.

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Kuttruff, Heinrich. "Sound waves in a room." In Room Acoustics, 51–79. Sixth edition. | Boca Raton : CRC Press, [2017]: CRC Press, 2016. http://dx.doi.org/10.1201/9781315372150-3.

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Тези доповідей конференцій з теми "Sound insulation of the room"

1

Bushmanov, Aleksandr, and A. Tolkachev. "MODELING OF SOUND INSULATION OF A ROOM." In XIV International Scientific Conference "System Analysis in Medicine". Far Eastern Scientific Center of Physiology and Pathology of Respiration, 2020. http://dx.doi.org/10.12737/conferencearticle_5fe01d9b88cf17.17389677.

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A model for calculating the sound insulation of a room for confidential negotiations is proposed. Two sources of sound are considered, a conversation between two people. It simulates the passage of sound through sound-absorbing structures such as doors, Windows, walls, and air vents. The simulation is performed using the COMSOL Multiphysics package.
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Zhang, Siwen, Jian Pang, Jun Zhang, Zhuangzhuang Ma, Xiaoxuan Zhang, Congguang Liu, and Lihui Deng. "A Subjective Evaluation Method for Sound Insulation of Vehicle Body in Reverberation Room and an Objective Prediction Model." In Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-01-1886.

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Ishihama, Masao, and Hiromitsu Sakurai. "Motor Vehicle Exterior Sound Quality Improvement for Indoors." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14041.

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The objectives of this study are these three items. 1) To find better indices than dB(A) for representing annoyances caused by motor vehicle traffic noise along highways. 2) To find the frequency range of motor vehicle exterior noise that should primarily be controlled to achieve better indoor sound environment along highways. 3) To find suitable vehicle driving conditions for evaluating indoor sound environment. To obtain the desired results psycho-acoustic experiments were conducted. Firstly, sound samples were collected with microphones placed at such locations as on a sidewalk, in front of a small house and at the center of a room inside of the house. The number of test vehicles was fifteen, consisting of six motorcycles and nine passenger cars. The driving conditions were full acceleration and mild acceleration usually found in normal traffic flow. Secondly, semantic differentiation method was used. Ten pairs of adjectives were used to scale the impressions of each sound sample. Finally, physical characters of the sound samples and their subjective evaluations were compared. The results were obtained as follows. 1) Six sound samples got more uncomfortable impression at indoors. These sound samples were collected by vehicles with sport-type mufflers. 2) The samples that indoor sound quality is degraded than outdoor contain high power in low frequency range below 200 Hz. These low frequency components penetrate through the housing walls more easily than higher frequency components. 3) The degradation of comfort impression was found in mild acceleration conditions. The low frequency components of sound samples for mild acceleration are larger than those for full acceleration. Though the throttle is not fully open in mild acceleration, low engine speed generates low frequency components, and eventually increased indoor sound power in the frequency range. The conclusions drawn from these results are, 1) Indoor sound samples should be included for evaluating sound environment along highways. 2) Mild acceleration is a better driving condition for evaluating indoor sound environment along highways. In this condition, very low engine speed causes low frequency component emission that penetrate into housing more than in heavy accelerating conditions. 3) Engine exhaust systems that emit very loud low-frequency components should be focused upon in regulating traffic noise. 4) Extensive collection and analysis of housing sound insulation, absorption and resonance data along highways are necessary for further investigations. 5) Better psycho-acoustic experiment methods should be developed for investigating sound context effects on panelists.
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Avtua Kraveishvili, A. "LOW FREQUENCY SOUND INSULATION." In ACOUSTICS 2021. Institute of Acoustics, 2021. http://dx.doi.org/10.25144/13758.

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Kleckner, Jeff A., and Richard A. Kolano. "Reverberation Room Sound System Loudspeaker Selection." In SAE 2005 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-2442.

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Wittstock, Volker. "Sound Power and Sound Insulation at Low Frequencies." In 2018 Joint Conference - Acoustics. IEEE, 2018. http://dx.doi.org/10.1109/acoustics.2018.8502395.

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Milne, D., L. Davison, and L. Ausiello. "USE OF ARTIFICIAL INTELLIGENCE IN ROOM ACOUSTICS PREDICTION USING A PHOTOGRAPH." In REPRODUCED SOUND 2020. Institute of Acoustics, 2020. http://dx.doi.org/10.25144/13372.

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Milne, D., L. Davison, and L. Ausiello. "USE OF ARTIFICIAL INTELLIGENCE IN ROOM ACOUSTICS PREDICTION USING A PHOTOGRAPH." In REPRODUCED SOUND 2020. Institute of Acoustics, 2020. http://dx.doi.org/10.25144/13372.

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Thakkar, P., and J. Oclee-Brown. "STATISTICAL OPTIMISATION OF ROOM DIMENSIONS AND LAYOUT FOR CRITICAL LISTENING APPLICATIONS." In Reproduced Sound 2021. Institute of Acoustics, 2021. http://dx.doi.org/10.25144/13802.

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Li, Yan, Peter Driessen, George Tzanetakis, and Steve Bellamy. "Spatial Sound Rendering Using Measured Room Impulse Responses." In 2006 IEEE International Symposium on Signal Processing and Information Technology. IEEE, 2006. http://dx.doi.org/10.1109/isspit.2006.270840.

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Звіти організацій з теми "Sound insulation of the room"

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Zarr, Robert R., Thomas A. Somers, and Donn F. Ebberts. Room-temperature thermal conductivity of fumed-silica insulation for a Standard Reference Material. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nist.ir.88-3847.

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Birchmore, Roger. Medium-density Dwellings in Auckland and the Building Regulations. Unitec ePress, July 2018. http://dx.doi.org/10.34074/ocds.0822.

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National thermal standards have historically been set to minimise winter heating energy in detached houses. It is uncertain whether these standards are optimal for the increasing number of joined, medium-density dwellings when summer and winter conditions are considered. Using freely available software, annual heating energy use and summertime peak temperatures were calculated for a number of versions of detached and joined dwellings offering the same occupied volume and window areas. Initial results indicated that, as expected, the joined dwellings required less heating energy. The detached house exhibited a higher peak summertime temperature but a lower overall average daily temperature. Interventions such as changing insulation, glazing areas and ventilation were calculated to reduce summertime temperatures in the joined dwelling. Increasing ventilation provided the greatest improvement particularly during the sensitive sleeping hours. Changes to clauses H1 Energy Efficiency, G4 ventilation and G6 Airborne and Impact Sound are recommended if these early findings are confirmed in a more complex simulation.
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Weinschenk, Craig, Daniel Madrzykowski, and Paul Courtney. Impact of Flashover Fire Conditions on Exposed Energized Electrical Cords and Cables. UL Firefighter Safety Research Institute, October 2019. http://dx.doi.org/10.54206/102376/hdmn5904.

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A set of experiments was conducted to expose different types of energized electrical cords for lamps, office equipment, and appliances to a developing room fire exposure. All of the cords were positioned on the floor and arranged in a manner to receive a similar thermal exposure. Six types of cords commonly used as power supply cords, extension cords, and as part of residential electrical wiring systems were chosen for the experiments. The non-metallic sheathed cables (NMB) typically found in residential electrical branch wiring were included to provide a link to previous research. The basic test design was to expose the six different types of cords, on the floor of a compartment to a growing fire to determine the conditions under which the cord would trip the circuit breaker and/or undergo an arc fault. All of the cords would be energized and installed on a non-combustible surface. Six cord types (18-2 SPT1, 16-3 SJTW, 12-2 NM-B, 12-3 NM-B, 18-3 SVT, 18-2 NISPT-2) and three types of circuit protection (Molded case circuit breaker (MCCB), combination Arc-fault circuit interrupter (AFCI), Ground-fault circuit interrupter (GFCI)) were exposed to six room-scale fires. The circuit protection was remote from the thermal exposure. The six room fires consisted of three replicate fires with two sofas as the main fuel source, two replicate fires with one sofa as the main fuel source and one fire with two sofas and MDF paneling on three walls in the room. Each fuel package was sufficient to support flashover conditions in the room and as a result, the impact on the cords and circuit protection was not significantly different. The average peak heat release rate of the sofa fueled compartment fires with gypsum board ceiling and walls was 6.8 MW. The addition of vinyl covered MDF wall paneling on three of the compartment walls increased the peak heat release rate to 12 MW, although most of the increased energy release occurred outside of the compartment opening. In each experiment during post flashover exposure, the insulation on the cords ignited and burned through, exposing bare conductor. During this period the circuits faulted. The circuit protection devices are not designed to provide thermal protection, and, thus, were installed remote from the fire. The devices operated as designed in all experiments. All of the circuit faults resulted in either a magnetic trip of the conventional circuit breaker or a ground-fault trip in the GFCI or AFCI capable circuit protection devices. Though not required by UL 1699, Standard for Safety for Arc-Fault Circuit-Interrupters as the solution for detection methodology, the AFCIs used had differential current detection. Examination of signal data showed that the only cord types that tripped with a fault to ground were the insulated conductors in non-metallic sheathed cables (12-2 NM-B and 12-3 NM-B). This was expected due to the bare grounding conductor present. Assessments of both the thermal exposure and physical damage to the cords did not reveal any correlation between the thermal exposure, cord damage, and trip type.
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Giordano, Paolo, and Cloe Ortiz de Mendívil. Trade in Services in Latin America and the Caribbean: An Overview of Trends, Costs, and Policies. Inter-American Development Bank, November 2021. http://dx.doi.org/10.18235/0003801.

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Trade in services is becoming increasingly relevant. Changing technologies have transformed the landscape, making international trade possible in sectors that were once considered nontradable. But the lack of consistent, reliable data prevents analysts from fully understanding and accurately describing trade in services. Despite this limitation, this report aims to outline Latin America and the Caribbeans competitiveness in global services markets. It concludes that the region still focuses on traditional sectors like travel and transportation, despite some green shoots in nontraditional services, and that costs remain high in comparison with other regions of the world. Furthermore, the regulatory framework in the region is still weak, and although several modern trade agreements are already in place, there is still room for improvement. Sound policies to further develop trade in services and boost competitiveness in nontraditional sectors such as computer or business services would help the region to diversify its export baskets and build trade resilience.
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