Relevant bibliographies by topics / Acoustic detector

Academic literature on the topic 'Acoustic detector'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Acoustic detector"

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Gazivoda, Marko, Dinko Oletić, and Vedran Bilas. "Features and Always-On Wake-Up Detectors for Sparse Acoustic Event Detection." Electronics 11, no. 3 (February 6, 2022): 478. http://dx.doi.org/10.3390/electronics11030478.

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The need to understand and manage our surroundings has led to increased interest in sensor networks for the continuous monitoring of events and processes of interest. To reduce the power consumption required for continuous monitoring, dedicated always-on wake-up detectors have been designed, with an emphasis on their low power consumption, simple and robust design, and reliable and accurate detection. An especially interesting application of these wake-up detectors is in detecting acoustic signals. In this paper, we present a study on the features and detectors applicable for the detection of sporadic acoustic events. We perform a state-of-the-art acoustic detector analysis, grouping the detectors based on the features they utilize and their implementations. This analysis shows that acoustic wake-up detectors predominantly utilize spectro-temporal (56%) and temporal features (36%). Following the state-of-the-art analysis, we select two detector architecture candidates for a case study on passing motor vehicle detection. We utilize our previously developed spectro-temporal decomposition detector and develop a novel level-crossing rate detector. The results of the case study shows that the proposed level-crossing rate detector has lower component count (44 compared to 70) and power consumption (9.1 µW compared to 34.6 µW) and is an optimal solution for SNRs over 0 dB.
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Fertig, Glenn H. "Photo‐acoustic detector." Journal of the Acoustical Society of America 87, no. 5 (May 1990): 2281. http://dx.doi.org/10.1121/1.399123.

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Fertig, Glenn H. "Photo-acoustic detector." Journal of the Acoustical Society of America 89, no. 6 (June 1991): 3034. http://dx.doi.org/10.1121/1.400816.

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Riccobene, Giorgio. "The Positioning system for KM3NeT." EPJ Web of Conferences 207 (2019): 07005. http://dx.doi.org/10.1051/epjconf/201920707005.

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The paper describes the implementation of a hybrid positioning system based on tilt and compass sensors, integrated into an electronic board, and an acoustic positioning system to be installed aboard KM3NeT. The acoustic system will be capable to fulfil detector relative and absolute positioning, to provide data for cross-fertilisation with Earth and Sea science (bio-acoustics and environmental monitoring) and to allow studies for neutrino acoustic detection. Tilt and Compass boards installed in each optical module provide information about the DOM orientation.
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KARG, T., G. ANTON, K. GRAF, J. HÖSSL, A. KAPPES, U. KATZ, R. LAHMANN, C. NAUMANN, and K. SALOMON. "DESIGN CONSIDERATIONS AND SENSITIVITY ESTIMATES FOR AN ACOUSTIC NEUTRINO DETECTOR." International Journal of Modern Physics A 21, supp01 (July 2006): 212–16. http://dx.doi.org/10.1142/s0217751x06033647.

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We present a Monte Carlo study of an underwater neutrino telescope based on the detection of acoustic signals generated by neutrino induced cascades. This provides a promising approach to instrument large detector volumes needed to detect the small flux of cosmic neutrinos at ultra-high energies (E ≳ 1 EeV ). Acoustic signals are calculated based on the thermo-acoustic model. The signal is propagated to the sensors taking frequency dependent attenuation into account, and detected using a threshold trigger, where acoustic background is included as an effective detection threshold. A simple reconstruction algorithm allows for the determination of the cascade direction and energy. Various detector setups are compared regarding their effective volumes. Sensitivity estimates for the diffuse neutrino flux are presented.
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Zhou, Xiaoteng, Shihao Yuan, Changli Yu, Hongyuan Li, and Xin Yuan. "Performance Comparison of Feature Detectors on Various Layers of Underwater Acoustic Imagery." Journal of Marine Science and Engineering 10, no. 11 (October 31, 2022): 1601. http://dx.doi.org/10.3390/jmse10111601.

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Image feature matching is essential in many computer vision applications, and the foundation of matching is feature detection, which is a crucial feature quantification process. This manuscript focused on detecting more features from underwater acoustic imageries for further ocean engineering applications of autonomous underwater vehicles (AUVs). Currently, the mainstream feature detection operators are developed for optical images, and there is not yet a feature detector oriented to underwater acoustic imagery. To better analyze the suitability of existing feature detectors for acoustic imagery and develop an operator that can robustly detect feature points in underwater imageries in the future, this manuscript compared the performance of well-established handcrafted feature detectors and that of the increasingly popular deep-learning-based detectors to fill the gap in the literature. The datasets tested are from the most commonly used side-scan sonars (SSSs) and forward-looking sonars (FLSs). Additionally, the detection idea of these detectors on the acoustic imagery phase congruency (PC) layer was innovatively proposed with the aim of finding a solution that balances detection accuracy and speed. The experimental results show that the ORB (Oriented FAST and Rotated BRIEF) and BRISK (Binary Robust Invariant Scalable Keypoints) detectors achieve the best overall performance, the FAST detector is the fastest, and the PC and Sobel layers are the most favorable for implementing feature detection.
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Pudov, A. O., S. A. Sokolov, A. S. Abyzov, A. V. Rybka, and V. E. Kutny. "Digital FPGA-based processing of pulses of gas-filled gamma-radiation detector for acoustic noise suppression." Технология и конструирование в электронной аппаратуре, no. 1-3 (2022): 44–49. http://dx.doi.org/10.15222/tkea2022.1-3.44.

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Gas-filled proportional detectors of ionizing radiation often contain such elements as thin anode wire, which make them sensitive to external acoustic or vibrational impact. This study investigates such sensitivity for the case of the proportional -radiation detectors filled with high-purity xenon gas. The detector demonstrates a dependence of its signal noise on the external acoustic wave frequency, the character of which most likely depends on the design of the detector, i.e. on such parameters as diameter and tension strength of the anode wire, etc. To suppress the negative impact of acoustic noise on the characteristics of the detector, the detector digital signal is processed in a Field-Programmable Gate Array board. The authors investigate the algorithm of «time windows», which allows separating (filtering) low-frequency noise in the output signal of a gas-filled detector, which arises due to the influence of external sound, from the useful signal, i.e. the ionization pulses. This approach allows performing spectral measurements of -radiation with a significant acoustic noise background, when detectors with a conventional analog spectrometric channel cannot handle the task.
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Kuczera, H., H. Iglseder, U. Weishaupt, and E. Igenbergs. "Acoustic Penetration and Impact Detector for Micrometeoroid and Space Debris Application." International Astronomical Union Colloquium 85 (1985): 129. http://dx.doi.org/10.1017/s0252921100084487.

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AbstractAn active detector is described which recently has been developed for laboratory impact measurements and which already has been proposed for cosmic dust flight experiments. The detector consists of a very thin penetration foil and an impact plate. By means of piezo detectors the elastic-wave propagation times between the impact location and the piezo detectors can be measured in the foil and in the target. The evaluation of these signals gives the time of the event, the impact location, the projectile velocity, the flight path direction and at least the order of magnitude of mass of the impacting particle. This type of sensor will meet all requirements for particle detection in the diameter range from a few microns (dust particles) up to approx. a few millimeters (space debris) at all velocities. Small-sized projectiles can be detected by sensitive amplifiers. Low-energy electronics including data storage can be used for triangulation and impact time calculation. First experimental results which have been achieved in the Munich Accelerator Facilities will be presented.
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Rowan, Sheila. "Current and future status of gravitational wave astronomy - gravitational wave facilities." Proceedings of the International Astronomical Union 2, no. 14 (August 2006): 526–27. http://dx.doi.org/10.1017/s1743921307011684.

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AbstractCurrently a network of interferometric gravitational wave detectors is in operation around the globe, in parallel with existing acoustic bar-type detectors. Searches are underway aimed at the first direct detection of gravitational radiation from astrophysical sources. This paper briefly summarizes the current status of operating gravitational wave facilities, plans for future detector upgrades, and the status of the planned space-based gravitational wave detector LISA.
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Baule, Heinrich, and Manfred Borgers. "Acoustic ground vibration detector." Journal of the Acoustical Society of America 87, no. 2 (February 1990): 923. http://dx.doi.org/10.1121/1.398879.

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Dissertations / Theses on the topic "Acoustic detector"

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Wollenberg, Glen David. "Development and evaluation of an acylating agent detector using surface acoustic wave devices." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10032007-171625/.

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Barr, Elaine Lewis. "Acoustic sampling considerations for bats in the post-white-nose syndrome landscape." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/104232.

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Bat populations across North America are either facing new threats from white-nose syndrome (WNS) and wind energy development or have already experienced precipitous declines. Accordingly, researchers and managers need to know how to best monitor bats to document population and distribution changes, as well as where to look for persisting populations. Landscape-scale WNS impacts to summer bat populations are not well understood, and although acoustic monitoring is commonly used to monitor these populations, there is limited information about differences among acoustic detectors and the implications to managers thereof. My objectives were to model the relationship between WNS impact, influence of available hibernacula, and environmental factors for summer nightly presence of three WNS-affected bats and to compare how multiple models of acoustic detectors perform in terms of detection probability and nightly recorded bat activity. I collected acoustic data from 10 study areas across Virginia, West Virginia, Ohio and Kentucky to describe changes in nightly presence of WNS-affected bat species during summer 2017. During the same period of time, I compared five types of acoustic detectors at Fort Knox, Kentucky. My results show the potential efficacy of using a WNS impact-year metric to predict summer bat presence, and highlight which environmental variables are relevant for large-scale acoustic monitoring. Additionally, my findings suggest that each of the detector types tested would suffice for most research and monitoring activities, but standardization of detector type within the scope of a project or study should be encouraged.
Master of Science
Bat populations across North America are either facing new threats from white-nose syndrome (WNS) and wind energy development or have already experienced devastating declines. Accordingly, wildlife biologists need to know how to best monitor bats to document population and distribution changes, as well as where to look for remaining populations. Landscape-scale WNS impacts to summer bat populations are not well understood, and although acoustic technology is commonly used to monitor these populations, there is limited information about differences among acoustic detectors and the implications to managers thereof. My objectives were to model the relationship between WNS impact, influence of available bat hibernation caves, and environmental factors for summer nightly presence of three WNS-affected bats and to compare how multiple models of acoustic detectors perform in terms of detection probability and nightly recorded bat activity. I collected acoustic data from 10 study areas across Virginia, West Virginia, Ohio and Kentucky to describe changes in nightly presence of WNS-affected bat species during summer 2017. During the same period of time, I compared five types of acoustic detectors at Fort Knox, Kentucky. My results show potential viability of a WNS impact-year metric to predict summer bat presence, and highlight which environmental variables are relevant for large-scale acoustic monitoring. Additionally, my findings suggest that each of the detector types tested would suit most research and monitoring activities, but standardization of detector type within the scope of a project or study should be encouraged.
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Gras, Slawomir M. "Opto-acoustic interactions in high power interferometric gravitational wave detectors." University of Western Australia. School of Physics, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0093.

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[Truncated abstract] Advanced laser interferometer gravitational wave detectors require an extremely high optical power in order to improve the coupling between the gravitational wave signal and the optical field. This high power requirement leads to new physical phenomena arising from nonlinear interactions associated with radiation pressure. In particular, detectors with multi-kilometer-long arm cavities containing high density optical fields suffer the possibility of 3-mode opto-acoustic interactions. This involves the process where ultrasonic vibrations of the test mass cause the steady state optical modes to scatter. These 3-mode interactions induce transverse optical modes in the arm cavities, which then can provide positive feedback to the acoustic vibrations in the test masses. This may result in the exponential growth of many acoustic mode amplitudes, known as Parametric Instability (PI). This thesis describes research on 3-mode opto-acoustic interactions in advanced interferometric gravitational wave detectors through numerical investigations of these interactions for various interferometer configurations. Detailed analysis reveals the properties of opto-acoustic interactions, and their dependence on the interferometer configuration. This thesis is designed to provide a pathway towards a tool for the analysis of the parametric instabilities in the next generation interferometers. Possible techniques which could be helpful in the design of control schemes to mitigate this undesirable phenomenon are also discussed. The first predictions of parametric instability considered only single interactions involving one transverse mode and one acoustic mode in a simple optical cavity. ... In Chapter 6, I was able to make use of a new analytical model due to Strigin et al., which describes parametric instability in dual recycling interferometers. To make the solution tractable, it was necessary to consider two extreme cases. In the worst case, recycling cavities are assumed to be resonant for all transverse modes, whereas in the best cases, both recycling cavities are anti-resonant for the transverse modes. Results show that, for the worst case, parametric gain values as high as ~1000 can be expected, while in the best case the gain can be as low as ~ 3. The gain is shown to be very sensitive to the precise conditions of the interferometer, emphasising the importance of understanding the behaviour of the detectors when the cavity locking deviates from ideal conditions. Chapter 7 of this thesis contains work on the observation of 3-mode interactions in an optical cavity at Gingin, which confirms the analysis presented here, and also a paper which shows how the problem of 3-mode interactions can be harnessed to create new devices called opto-acoustic parametric amplifiers. In the conclusions in Chapter 8, I discuss the next important steps in understanding parametric interactions in real interferometers – including the need for more automated codes relevant to the design requirements for recycling cavities. In particular, it is pointed out how the modal structure of power and signal recycling cavities must be understood in detail, including the Gouy phase for each transverse mode, to be able to obtain precise predictions of parametric gain. This thesis is organised as a series of papers which are published or have been submitted for publication. Such writing style fills the condition for Ph.D. thesis at the University of Western Australia.
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Manoosingh, Lane Leslie. "Design of a chemical agent detector based on polymer coated surface acoustic wave (SAW) resonator technology." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000412.

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Batista, Pablo Diniz. "Dispositivos semicondutores a partir de óxidos de estanho e zinco." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-03052010-144214/.

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Este trabalho apresenta o desenvolvimento de dispositivos semicondutores utilizando óxidos de zinco e estanho. O primeiro dispositivo semicondutor estudado está relacionado ao desenvolvimento de sensores de pH a partir do efeito de campo, enquanto que o segundo consiste na utilização de ondas acústicas de superfície para o transporte de portadores voltados para o desenvolvimento de detectores de um único fóton. Primeiramente, esses materiais foram utilizados como membranas sensíveis a íons de hidrogênio. Para isso foram fabricados os dispositivos denominados EGFETs cujo princípio de funcionamento é semelhante ao ISFET. Foram desenvolvidos filmes de SnO2 obtidos a partir da rota Pechini e pela técncia Sol-gel com o objetivo de investigar a resposta elétrica do EGFET em função da concentração de íons de H+ . Os sensores fabricados pela técnica sol-gel não apresentaram respostas satisfatórias devido à presença de poros. Por outro lado, obtivemos uma sensibilidade de 33mV/pH para o EGFET desenvolvido a partir da rota Pechini com uma membrana calcinada à 400o C. Propusemos também a utilização do ZnO como um possível candidato a sensor de pH a partir do EGFET. A melhor resposta do EGFET (uma sensibilidade de 38mV/pH) foi alcançada com a utilização de filmes de ZnO aquecidos à temperatura de 150o C. Além dos dispositivos para a detecção de íons de H+ apresentamos uma nova abordagem para a detecção de um único fóton a partir da combinação de dispositivos utilizando ondas acústicas de superfície e os transistores de um único elétron. Basicamente os protótipos consistem em uma estrutura de várias camadas otimizadas para uma eficiente absorção de fótons, uma junção p-i-n utilizada para coleta de portadores, IDT para geração da SAW e guias metálicos para controle de portadores durante o transporte acústico. Os portadores são eficientemente transportados por uma distância de 100 mm com uma perda de 12 % para a melhor configuração. Nessas condições, a eficiência do dispositivo é de 75%.
This work presents the study and development of semiconductor devices base on tin and zinc oxides. The first device is related to the development of pH sensors based on field effect, while the second device uses surface acoustic waves for the transport of carriers related to a single photon detector device. Initially, the semiconductors were used as hydrogen ions sensing membranes. For that aim extended gate field effect transistors (EGFET) were developed. Their working principle is similar to the ion sensitive field effect transistor (ISFET). Through Pechini and sol-gel SnO2 thin films were obtained. The EGFET response to H+ ions was not optimal due to the presence of pores. Using Pechini, a response of 33mV/pH was obtained for the EGFET membrane calcinated at 400o C. The use of ZnO as sensing membrane was also investigated, and the best response was a sensibility of 38mV/pH) for a film heated up to 150o C. In addition to the EGFET structure, a new approach to a single photon detection is presented. This uses the combination of surface acoustic waves with a single electron transistor. Two prototypes were developed using a multi-layered structure optimized for photon absorption. Carriers are collected using a p-i-n structure. Inter-digital-transducers are used for surface acoustinc wave generation. Metallic guides are used to control the carriers during acoustic tranport. Carriers were efficiently transported over a length of 100 mm with a loss of 12 % for the best configuration. Under this optimized conditions, the efficiency of the device is 75%.
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Moragues, Escrivá Jorge. "New energy detector extensions with application in sound based surveillance systems." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/11520.

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This thesis is dedicated to the development of new energy detectors employed in the detection of unknown signals in the presence of non-Gaussian and non-independent noise samples. To this end, an extensive study has been conducted on di erent energy detection structures, and novel techniques have been proposed which are capable of dealing with these problematic situations. The energy detector is proposed as an optimum solution to detect uncorrelated Gaussian signals, or as a generalized likelihood ratio test to detect entirely unknown signals. In both cases, the background noise must be uncorrelated Gaussian. However, energy detectors degrade when the noise does not ful ll these characteristics. Therefore, two extensions are proposed. The rst is the extended energy detector, which deals with the problem of non-Gaussian noise; and the second is the preprocessed extended energy detector, used when the noise also possesses non-independent samples. A generalization of the matched subspace lter is likewise proposed based on a modi cation of the Rao test. In order to evaluate the expected improvement of these extensions with respect to the classical energy detector, a signalto- noise ratio enhancement factor is de ned and employed to illustrate the improvement achieved in detection. Furthermore, we demonstrate how the uncertainty introduced by the unknown signal duration can decrease the performance of the energy detector. In order to improve this behavior, a multiple energy detector, based on successive subdivisions of the original observation interval, is presented. This novel detection technique leads to a layered structure of energy detectors whose observation vectors are matched to di erent intervals of signal duration. The corresponding probabilities of false alarm and detection are derived for a particular subdivision strategy, and the required procedures for their general application to other possible cases are indicated. The experiments reveal the advantages derived from utilizing this novel structure, making it a worthwhile alternative to the single detector when a signi cant mismatch is present between the original observation length and the actual duration of the signal.
Moragues Escrivá, J. (2011). New energy detector extensions with application in sound based surveillance systems [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/11520
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Verdet, Florian. "Exploring variabilities through factor analysis in automatic acoustic language recognition." Phd thesis, Université d'Avignon, 2011. http://tel.archives-ouvertes.fr/tel-00954255.

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Language Recognition is the problem of discovering the language of a spoken definitionutterance. This thesis achieves this goal by using short term acoustic information within a GMM-UBM approach.The main problem of many pattern recognition applications is the variability of problemthe observed data. In the context of Language Recognition (LR), this troublesomevariability is due to the speaker characteristics, speech evolution, acquisition and transmission channels.In the context of Speaker Recognition, the variability problem is solved by solutionthe Joint Factor Analysis (JFA) technique. Here, we introduce this paradigm toLanguage Recognition. The success of JFA relies on several assumptions: The globalJFA assumption is that the observed information can be decomposed into a universalglobal part, a language-dependent part and the language-independent variabilitypart. The second, more technical assumption consists in the unwanted variability part to be thought to live in a low-dimensional, globally defined subspace. In this work, we analyze how JFA behaves in the context of a GMM-UBM LR framework. We also introduce and analyze its combination with Support Vector Machines(SVMs).The first JFA publications put all unwanted information (hence the variability) improvemen tinto one and the same component, which is thought to follow a Gaussian distribution.This handles diverse kinds of variability in a unique manner. But in practice,we observe that this hypothesis is not always verified. We have for example thecase, where the data can be divided into two clearly separate subsets, namely datafrom telephony and from broadcast sources. In this case, our detailed investigations show that there is some benefit of handling the two kinds of data with two separatesystems and then to elect the output score of the system, which corresponds to the source of the testing utterance.For selecting the score of one or the other system, we need a channel source related analyses detector. We propose here different novel designs for such automatic detectors.In this framework, we show that JFA's variability factors (of the subspace) can beused with success for detecting the source. This opens the interesting perspectiveof partitioning the data into automatically determined channel source categories,avoiding the need of source-labeled training data, which is not always available.The JFA approach results in up to 72% relative cost reduction, compared to the overall resultsGMM-UBM baseline system. Using source specific systems followed by a scoreselector, we achieve 81% relative improvement.
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Jung, Du San. "Detection of binary phase-shift keying signal in multioath propagation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FJung.pdf.

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Zelnio, Anne M. "Detection of Small Aircraft using an Acoustic Array." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1247075795.

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Phelan, Patrick. "Investigation of enhanced soot deposition on smoke alarm horns." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-01075-121834/.

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Books on the topic "Acoustic detector"

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Optical, acoustic, magnetic, and mechanical sensor technologies. Boca Raton: Taylor & Francis, 2012.

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Iniewski, Krzysztof. Optical, acoustic, magnetic, and mechanical sensor technologies. Boca Raton: Taylor & Francis, 2012.

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I, I͡U︡danov K., ed. Acoustic fish reconnaissance. Boca Raton: CRC/Taylor & Francis, 2005.

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Vernede, L. Multiple acoustic sensor detection system. Manchester: UMIST, 1993.

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1952-, Simmonds E. John, ed. Fisheries acoustics. London: Chapman & Hall, 1992.

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Hughes, David M. Continuous system acoustic monitoring: From start to repair. Denver, Colo: Water Research Foundation, 2011.

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Goodman, Craig W. An investigation of the APAIR acoustic detection model. Monterey, Calif: Naval Postgraduate School, 1989.

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N, MacLennan D., and MacLennan D. N, eds. Fisheries acoustics: Theory and practice. 2nd ed. Oxford: Blackwell Pub., 2005.

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Eckert, Eric G. Acoustic location of leaks in pressurized underground petroleum pipelines. Cincinnati, OH: U.S. Environmental Protection Agency, Research and Development, Risk Reduction Engineering Laboratory, 1992.

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W, Maresca J., and Risk Reduction Engineering Laboratory (U.S.), eds. Acoustic location of leaks in pressurized underground petroleum pipelines. Cincinnati, Ohio: Risk Reduction Engineering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1992.

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Book chapters on the topic "Acoustic detector"

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Liu, Zhiyong, Yinghua Wang, and Yinyin Wang. "Variable Tap-Length Multiuser Detector for Underwater Acoustic Communication." In Machine Learning and Intelligent Communications, 87–95. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73447-7_11.

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Jedrusyna, Artur, and Andrzej Noga. "Acoustic detector of argon content in air-argon mixture." In Advanced Mechatronics Solutions, 329–34. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23923-1_50.

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Calabrò, Antonino, Maria Nadia Postorino, and Giuseppe M. L. Sarnè. "An Acoustic Passive Detector for Traffic Counts with Neural Networks." In Perspectives in Neural Computing, 215–20. London: Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-0219-9_23.

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Domnik, M., M. Schöttler, and L. J. Balk. "Detector Strategy for Highly Versatile Scanning Electron Acoustic Microscopy (SEAM)." In Photoacoustic and Photothermal Phenomena, 292–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-540-48181-2_77.

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Kuczera, H., H. Iglseder, U. Weishaupt, and E. Igenbergs. "Acoustic Penetration and Impact Detector for Micrometeoroid and Space Debris Application." In Properties and Interactions of Interplanetary Dust, 129. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5464-9_27.

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Tom-Moy, May, Thomas P. Doherty, Richard L. Baer, and Darlene Spira-Solomon. "Use of an Acoustic Wave Device as a Liquid Chromatography Detector." In ACS Symposium Series, 9–18. Washington, DC: American Chemical Society, 1996. http://dx.doi.org/10.1021/bk-1995-0613.ch002.

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Liu, Fang, Changqing Shen, Ao Zhang, Fanrang Kong, and Yongbin Liu. "An Adaptive Doppler Effect Reduction Algorithm for Wayside Acoustic Defective Bearing Detector System." In Lecture Notes in Mechanical Engineering, 125–35. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09507-3_13.

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Damarla, Thyagaraju. "Detection Theory." In Battlefield Acoustics, 19–26. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16036-8_3.

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Klepka, Andrzej. "Nonlinear Acoustics." In Advanced Structural Damage Detection, 73–107. Chichester, UK: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118536148.ch4.

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Hirao, Masahiko, and Hirotsugu Ogi. "Creep Damage Detection." In Electromagnetic Acoustic Transducers, 337–45. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56036-4_17.

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Conference papers on the topic "Acoustic detector"

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D'Amico, A., A. Petri, P. Verardi, and E. Verona. "NH3Surface Acoustic Wave Gas Detector." In IEEE 1987 Ultrasonics Symposium. IEEE, 1987. http://dx.doi.org/10.1109/ultsym.1987.199035.

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Dolya, G. N., and E. S. Litvinova. "Retroreflective laser detector of acoustic oscillations." In 2016 IEEE 13th International Conference on Laser and Fiber-Optical Networks Modeling (LFNM). IEEE, 2016. http://dx.doi.org/10.1109/lfnm.2016.7851212.

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Kalmár, György, George Wittemyer, Péter Völgyesi, Henrik Barner Rasmussen, Miklós Maróti, and Ákos Lédeczi. "Animal-Borne Acoustic Gunshot Detector (poster)." In MobiSys '19: The 17th Annual International Conference on Mobile Systems, Applications, and Services. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3307334.3328634.

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Grenar, David, Ondrej Sladok, Miloslav Filka, Karel Slavicek, Jiri Vavra, and Martin Kyselak. "Optical polarization-based acoustic pressure detector." In 2022 4th IEEE Middle East and North Africa COMMunications Conference (MENACOMM). IEEE, 2022. http://dx.doi.org/10.1109/menacomm57252.2022.9998249.

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Anderson, Gerald B., and Ryan S. McWilliams. "Vehicle Health Monitoring System Development and Deployment." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55212.

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Over the last several years the North American railroad industry has seen a determined growth in the area of advanced vehicle health monitoring systems, such as wheel impact load detectors, truck performance detectors, hunting detectors; and more recently, in low hanging air hose detectors, acoustic bearing detectors, and wheel profile measurement systems. The interest in performance-based monitoring is high and growing. Latest developments by Transportation Technology Center, Inc. (TTCI), a wholly owned subsidiary of the Association of American Railroads (AAR), are in the initial stages of deployment and include acoustic roller bearing detectors and truck performance detectors. Together, these detectors and others still in development look to provide railroads and car owners with information on car component performance that can lead to preventive or predictive maintenance. This paper will describe the development and deployment of the Trackside Acoustic Detection System (TADS) and Truck Performance Detector (TPD) by TTCI in North America and internationally.
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Vetelino, J. F., R. Lade, and R. S. Falconer. "Hydrogen Sulfide Surface Acoustic Wave Gas Detector." In IEEE 1986 Ultrasonics Symposium. IEEE, 1986. http://dx.doi.org/10.1109/ultsym.1986.198798.

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Alsabbah, Shebel, and Tariq Mughrabi. "Neural network-based waveguide acoustic gas detector." In 2008 5th International Symposium on Mechatronics and Its Applications (ISMA). IEEE, 2008. http://dx.doi.org/10.1109/isma.2008.4648867.

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Anderson, Gerald B., and Richard L. Smith. "Acoustic Identification of a Spun Cone Roller Bearing Defect." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0589.

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Abstract For Several years, the Association of American Railroads (AAR) has been developing new techniques to detect defective roller bearings as part of their new generation wayside acoustic detector program. This paper discusses data collected from several bearings with spun cone defects under both laboratory and simulated revenue service environments. The AAR performed the laboratory tests in July 1996 and the simulated revenue service test was completed in November 1996. Of all bearing defect types to be detected, the most challenging and highest priority is that of a bearing with a loose inner raceway (spinning cone) which rotates about the axle mount. Normal roller bearings have “press fit” inner raceways which keep them from rotating or sliding about the axle. The “Spun Cone” bearing defect is responsible for many of today’s bearing related derailments.
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Galloy, L., L. Berquez, F. Baudoin, and D. Payan. "PSpice modeling of the acoustic detector for a pulsed electro-acoustic cell." In 2013 IEEE International Conference on Solid Dielectrics (ICSD). IEEE, 2013. http://dx.doi.org/10.1109/icsd.2013.6619809.

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Anderson, Gerald B. "Acoustic Detection of Distressed Freight Car Roller Bearings." In ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/jrc/ice2007-40091.

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Trackside Acoustic Detection System (TADS®) development spearheaded implementation of an acoustic freight car roller bearing detector whose purpose is to prevent in-service bearing failures (burned off journals and hot bearing detector train stops). The means of accomplishing this goal is by providing the user with a warning of internal bearing defects or degradation with component involvement and severity information. The Transportation Technology Center, Inc. (TTCI) began the TADS® development process in 1994 with basic research into bearing defect acoustic emissions. Subsequently, TTCI conducted prototype testing on a North American railroad, constructed and installed of several international beta test systems, and finally has sold production systems in North America and internationally. There are currently about 40 TADS® sites in operation world-wide with 2.0 or more systems scheduled for installation in 2007. The original mission for TADS® in North America was an early warning of bearing degradation to allow for scheduled maintenance, but after initial evaluation, this mission enlarged to include notification of potentially high risk bearings. The high risk bearing is defined as one with fairly large areas of internal damage and at an increased risk of overheating or failing in service. The high risk bearing has a different acoustic signature, dissimilar to that of smaller defects. This paper will outline the change in mission for this detector and describe the development of an improved capability for detecting these high risk bearings.
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Reports on the topic "Acoustic detector"

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Chandler, David W., and Kevin E. Strecker. Acoustic detector for fission neutrons. Office of Scientific and Technical Information (OSTI), September 2012. http://dx.doi.org/10.2172/1055592.

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Diaz, Aaron A. PHASE 1 Technical Letter Report – TS-00358: Portable Acoustic Contraband Detector. Office of Scientific and Technical Information (OSTI), July 2007. http://dx.doi.org/10.2172/921583.

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Diaz, Aaron A., Anthony D. Cinson, Kayte M. Denslow, and John T. Munley. Phase 2 Technical Letter Report TS-00358: Portable Acoustic Contraband Detector. Office of Scientific and Technical Information (OSTI), January 2008. http://dx.doi.org/10.2172/1049030.

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Loos, Jennifer L., and /San Jose State U. /SLAC. Design and Implementation of an Acoustic X-ray Detector to Measure the LCLS Beam Energy. Office of Scientific and Technical Information (OSTI), August 2010. http://dx.doi.org/10.2172/992937.

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Blevins, Matthew, Gregory Lyons, Carl Hart, and Michael White. Optical and acoustical measurement of ballistic noise signatures. Engineer Research and Development Center (U.S.), January 2021. http://dx.doi.org/10.21079/11681/39501.

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Supersonic projectiles in air generate acoustical signatures that are fundamentally related to the projectile’s shape, size, and velocity. These characteristics influence various mechanisms involved in the generation, propagation, decay, and coalescence of acoustic waves. To understand the relationships between projectile shape, size, velocity, and the physical mechanisms involved, an experimental effort captured the acoustic field produced by a range of supersonic projectiles using both conventional pressure sensors and a schlieren imaging system. The results of this ongoing project will elucidate those fundamental mechanisms, enabling more sophisticated tools for detection, classification, localization, and tracking. This paper details the experimental setup, data collection, and preliminary analysis of a series of ballistic projectiles, both idealized and currently in use by the U.S. Military.
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Lockrem, L. L. Evaluation of a gas chromatograph with a novel surface acoustic wave detector (SAW GC) for screening of volatile organic compounds in Hanford waste tank samples. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/362485.

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Costley, D., Luis De Jesús Díaz,, Sarah McComas, Christopher Simpson, James Johnson, and Mihan McKenna. Multi-objective source scaling experiment. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/40824.

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The U.S. Army Engineer Research and Development Center (ERDC) performed an experiment at a site near Vicksburg, MS, during May 2014. Explosive charges were detonated, and the shock and acoustic waves were detected with pressure and infrasound sensors stationed at various distances from the source, i.e., from 3 m to 14.5 km. One objective of the experiment was to investigate the evolution of the shock wave produced by the explosion to the acoustic wavefront detected several kilometers from the detonation site. Another objective was to compare the effectiveness of different wind filter strategies. Toward this end, several sensors were deployed near each other, approximately 8 km from the site of the explosion. These sensors used different types of wind filters, including the different lengths of porous hoses, a bag of rocks, a foam pillow, and no filter. In addition, seismic and acoustic waves produced by the explosions were recorded with seismometers located at various distances from the source. The suitability of these sensors for measuring low-frequency acoustic waves was investigated.
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Uscinski, Barry J., and Daniel Rouseff. Acoustic Detection of Submerged Objects. Fort Belvoir, VA: Defense Technical Information Center, September 2008. http://dx.doi.org/10.21236/ada533100.

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Author, Not Given. Fiber Optic Acoustic Perimeter Detection. Office of Scientific and Technical Information (OSTI), April 2009. http://dx.doi.org/10.2172/950789.

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Uscinski, Barry J., and Daniel Rouseff. Acoustic Detection of Submerged Objects. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada569155.

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