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Rozprawy doktorskie na temat „Acoustics”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Liddy, David W. Holmes John F. "Acoustic room de-reverberation using time-reversal acoustics /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA374579.

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Thesis (M.S. in Applied Physics) Naval Postgraduate School, September 1999.<br>"September 1999". Thesis advisor(s):, Andrés Larraza, Bruce C. Denardo. Includes bibliographical references (p. 49). Also available online.

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Liddy, David W., and John F. Holmes. "Acoustic room de-reverberation using time-reversal acoustics." Thesis, Monterey, California: Naval Postgraduate School, 1999. http://hdl.handle.net/10945/13698.

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This thesis probes the performance of one-channel time-reversal acoustics in a chamber in terms of the geometry of the cavity. In particular, a rectangular chamber is compared to an enclosure that has a stadium shape. The mode structure in the rectangular cavity is highly symmetric, while it is highly irregular in the stadium-shaped cavity. Time- reversal acoustic techniques produce an improved focus in the latter. The focusing quality is determined as a function of frequency, time-reversal window size, and spatial extent. A scheme for encrypted acoustic communication, both in air and underwat

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3

Smurzynski, Jacek. "Acoustic Foundations of Signal Enhancement and Room Acoustics." Digital Commons @ East Tennessee State University, 2007. https://www.amzn.com/1597565628.

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Book Summary: Chermak and Musiek's two-volume, award-winning handbooks are back in newly revised editions. Extensively revised and expanded, Volume II provides expanded coverage of rehabilitative and professional issues, detailing intervention strategies for children and adults. Volume I provides comprehensive coverage of the auditory neuroscience and clinical science needed to accurately diagnose the range of developmental and acquired central auditory processing disorders in children, adults, and older adults. Building on the excellence achieved with the best-selling 1st editions which earne

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4

Ajaz, Mahnoor. "Finite Difference Time Domain Modelling of Ultrasonic Parametric Arrays in Two-Dimensional Spaces." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1619109761801613.

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5

Alenius, Emma. "Flow Duct Acoustics : An LES Approach." Doctoral thesis, KTH, MWL Strömningsakustik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104777.

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The search for quieter internal combustion engines drives the quest for a better understanding of the acoustic properties of engine duct components. Simulations are an important tool for enhanced understanding; they give insight into the flow-acoustic interaction in components where it is difficult to perform measurements. In this work the acoustics is obtained directly from a compressible Large Eddy Simulation (LES). With this method complex flow phenomena can be captured, as well as sound generation and acoustic scattering. The aim of the research is enhanced understanding of the acoustics o

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6

Zou, Chengzhe. "Structural Acoustics of Reconfigurable Tessellated Arrays for Acoustic Energy Guiding." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574285872850491.

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7

Kriewaldt, Hannah A. "Communications performance of an undersea acoustic wide-area network." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Mar%5FKriewaldt.pdf.

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Thesis (M.S. in Engineering Acoustics)--Naval Postgraduate School, March 2006.<br>Thesis Advisor(s): Joseph A. Rice. "March 2006." Includes bibliographical references (p.57-59). Also available online.

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8

Chen, Zhixin. "An investigation of acoustic impulse response measurement and modeling for small rooms." Diss., Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/chen/ChenZ1207.pdf.

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9

Ward, Gareth Paul. "The manipulation of sound with acoustic metamaterials." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29774.

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The original work presented in this thesis pertains to the design and characterisation of resonant-cavity-based acoustic metamaterials, with a focus on airborne sound. There are five separate experimental chapters, each with a unique approach to the design of periodic structures that can support and manipulate air-bound acoustic surface waves via diffractive coupling between resonant-cavities. The first two chapters concern measurement of the acoustic transmission though various kinds of periodic slit-arrays, whilst the latter three chapters utilise a near-field imaging technique to directly r

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10

Susbilla, Robert Tayag. "Casimir acoustics." Thesis, Monterey, California. Naval Postgraduate School, 1996. http://hdl.handle.net/10945/8062.

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Approved for public release; distribution is unlimited<br>When the indirect manifestations of the electromagnetic ZPF are interpreted as due to radiation pressure, acoustic noise can render an excellent analog to probe previous as well as recently proposed behavior. An acoustic chamber for isotropic and homogeneous acoustic noise of controllable spectral shape has been built. The noise can be driven up to levels of 130 dB (re 20 microPa) in a band of frequencies up to 50 kHz wide. When driving the system with broadband noise, it will be used (1) to test the Galilean invariance of a spectral sh

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11

Chang, Ding-chen. "Underwater acoustic pulse propagation using the Recursive Ray Acoustics (RRA) Algorithm." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA303441.

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12

Durany, Vendrell Jaume. "Geometrical room acoustics: ray based simulation for room acoustics." Doctoral thesis, Universitat Pompeu Fabra, 2016. http://hdl.handle.net/10803/395190.

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L’acústica de sales és la ciència encarregada d’estudiar la propagació del so en entorns tancats. La informació acústica de qualsevol entorn, coneguda com la resposta impulsional, s’expressa en termes del camp acústic com una funció de l’espai i el temps. La formulació analítica de la distribució de les variables del so és, en general, extremadament complexa d’obtenir i només existeixen solucions d’escenaris molt simples i irreals. Per tant, l’ús d’ordinadors per solucionar aquest tipus de problemes ha emergit com una alternativa adequada per calular funcions de resposta. En aquesta Te

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13

Wu, Xiao-Feng. "Variational principles for acoustic radiation and diffraction from underwater structures." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/17377.

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14

Keeser, Christopher Corson. "Shallow under water communication with passive phase conjugation and iterative demodulation and decoding." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/c_keeser_112408.pdf.

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Thesis (M.S. in electrical engineering)--Washington State University, December 2008.<br>Title from PDF title page (viewed on Jan. 21, 2009). "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 51-53)

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15

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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16

Angelopoulos, Pavlos. "Direct-sequence spread-spectrum acoustic communications with CRV Decomposition." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FAngelopoulos.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Engineering Acoustics)--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): Roberto Cristi, Kevin B. Smith. Includes bibliographical references (p. 91-94). Also available online.

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17

Hurrell, Andrew M. "Finite difference modelling of acoustic propagation and its applications in underwater acoustics." Thesis, University of Bath, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250842.

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18

Cates, Andrew Thomas. "Nonlinear diffractive acoustics." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315809.

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19

Onur, Cagla. "Acoustic Tracking Of Ship Wakes." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615656/index.pdf.

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Theories about ship wake structure, bubble dynamics, acoustic propagation through bubble clouds, backscattering and target strength of bubble clouds have been investigated and related Matlab simulations have been carried on. Research has been carried on algorithms for ship wake acoustic detection and tracking. Particle filter method has been simulated with Matlab for target tracking using wake echo measurements. Simulation results are promising.

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20

Kenney, Debra M. "A short water-filled pulse tube for the measurement of the acoustic properties of materials at low frequencies." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/16671.

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21

Root, Joseph Andrew. "Capabilities of an underwater acoustic volumetric array using time-reversal." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/18944.

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22

Woods, Simon Nicholas. "Acoustic Inspection of Timber." Thesis, University of Canterbury. Electrical and Computer Engineering, 2006. http://hdl.handle.net/10092/3679.

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The ability to determine wood quality using non-destructive tests has enormous potential for the forestry industry in both research and commercial applications. This thesis describes some of the theory of acoustic waves in wood and how wood stiffness can be estimated by measuring the velocity of acoustic waves. Attention is paid to both resonance and stress wave timer technologies and the benefits and problems with both. A detailed description is given of the design of a new tool (Treetap 5.0) to aid in future, acoustic based, timber inspection research.

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23

Kumon, Ronald Edward. "Nonlinear surface acoustic waves in cubic crystals /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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24

Sineiro, Guilherme da Silva. "Underwater multimode directional transducer evaluation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FSineiro.pdf.

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Thesis (M.S. in Engineering Acoustics)--Naval Postgraduate School, December 2003.<br>Thesis advisor(s): Thomas J. Hofler, Joseph A. Rice. Includes bibliographical references (p. 53-54). Also available online.

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25

Dessalermos, Spyridon. "Undersea acoustic propagation channel estimation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FDessalermos.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Applied Physics)--Naval Postgraduate School, June 2005.<br>Thesis Advisor(s): Joseph Rice, Roberto Cristi. Includes bibliographical references (p. 117-119). Also available online.

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26

Fabre, Josette. "Representative Environments for Reduced Estimation Time of Wide Area Acoustic Performance." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1156.

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Advances in ocean modeling (Barron et al., 2006) have improved such that ocean forecasts and even ensembles (e.g., Coelho et al., 2009) representing ocean uncertainty are becoming more widely available. This facilitates nowcasts (current time ocean fields / analyses) and forecasts (predicted ocean fields) of acoustic propagation conditions in the ocean which can greatly improve the planning of acoustic experiments. Modeling of acoustic transmission loss (TL) provides information about how the environment impacts acoustic performance for various systems and system configurations of intere

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27

Bechwati, Fouad. "Acoustics of activated carbon." Thesis, University of Salford, 2008. http://usir.salford.ac.uk/26573/.

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This thesis describes a study into how sound interacts with activated carbon, a material that exhibits adsorbing and desorbing properties. Adsorption is where molecules from the surrounding gas are attracted to the material microstructure and held in place by a weak physical attraction force named after the scientist van der Waals\ desorption is the opposite process. Activated carbons include a complex porous structure, with a large internal surface area, and a considerable adsorption capacity caused by free electrons in the deformed graphene layers. The process of adsorption and desorption is

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28

Kang, Jian. "Acoustics of long enclosures." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266240.

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29

James, Duncan Stuart. "Acoustics of cohesive sediments." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323344.

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30

Thompson, Philip R. Z. (Philip Reed Zane). "Space, time and acoustics." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/78997.

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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1988.<br>Includes bibliographical references (leaves 156-159).<br>This thesis describes the development of new concepts in acoustical analysis from their inception to implementation as a computer design tool. Research is focused on a computer program which aids the designer to visually conceive the interactions of acoustics within a geometrical~y defined environment by synthesizing the propagation of sound in a three dimensional space over time. Information is communicated through a unique use of images that are b

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31

Rendón, Pablo Luis. "Problems in nonlinear acoustics." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621365.

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32

Deal, Thomas J. "Reciprocity in vector acoustics." Thesis, Monterey, California: Naval Postgraduate School, 2017. http://hdl.handle.net/10945/52968.

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Approved for public release; distribution is unlimited<br>Reissued 30 May 2017 with Second Reader’s non-NPS affiliation added to title page.<br>The scalar reciprocity equation commonly stated in underwater acoustics relates pressure fields and monopole sources. It is often used to predict the pressure measured by a hydrophone for multiple source locations by placing a source at the hydrophone location and calculating the field everywhere for that source. That method, however, does not work when calculating the orthogonal components of the velocity field measured by a fixed receiver. This thesi

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33

Ozgenel, Caglar Firat. "Developing A Tool For Acoustical Performance Evaluation Throughout The Design." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614066/index.pdf.

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Performance of the buildings has always been a concern for the architects. With the enhancements in the technology, it is possible to measure, analyze and evaluate the performance of an architectural design before it is built via simulation tools developed. With the evaluation of the analysis performance of the concerned space can be upgraded if simulation tools are employed throughout the design process. However, even though the simulation tools are developed for the acoustical simulation and performance analysis, it is not always simple to integrate the simulation tools to whole design proce

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34

HAND, SCOTT ANTHONY. "ADAPTABLE ACOUSTICS IN MULTI-USE MUSIC PERFORMANCE SPACES." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1083634977.

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35

Zagala, Franck. "Simplified Acoustic Simulations and Virtual Acoustics : Contributions to Virtual Navigation for the Visually Impaired." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS254.

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Cette thèse s'inscrit dans projet RASPUTIN et s'intéresse au développement, à l'évaluation et à l'utilisation d'outils de simulation pour la réalité virtuelle acoustique dans le but d'aider les déficients visuels à préparer des navigations dans des lieux non-familiers. Alors que plusieurs outils d'assistance tels que des dispositifs de substitution sensorielle permettent de fournir des informations spatiales lors de navigations, une approche alternative consiste à concevoir un moteur de simulation et d'auralisation de l'acoustique d'un lieu en temps réel que les déficients visuels pourraient u

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36

Barsanti, Robert J. "Denoising of ocean acoustic signals using wavelet-based techniques." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA329379.

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Thesis (M.S. in Electrical Engineering and M.S. in Engineering Acoustics) Naval Postgraduate School, December 1996.<br>Thesis advisor(s): Monique P. Fargues and Ralph Hippenstiel. "December 1996." Includes bibliographical references (p. 99-101). Also available online.

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37

Abrahamson, Scott. "Automated psycho-acoustic experimental station." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/19566.

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38

Fountoulakis, Radamanthis P. "Oceanographic and acoustical survey of the East Ionian Sea." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA241360.

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Thesis (M.S. in Engineering Acoustics)--Naval Postgraduate School, September 1990.<br>Thesis Advisor(s): Bourke, Robert H. ; Coppens, Alan B. "September 1990." Description based on title screen as viewed on December 30, 2009. DTIC Identifiers: Raymode model, PE model. Author(s) subject terms: Oceanographic, acoustic survey, East Ionian Sea, PEmodel. Includes bibliographical references (p. 86-88). Also available in print.

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39

Goates, Caleb Burley. "Analytical Expressions for Acoustic Radiation Modes of Simple Curved Structures." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7494.

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The search for a convenient connection between vibration patterns on a structure and the sound radiated from that structure is ongoing in structural acoustics literature. Common techniques are wavenumber domain methods, or representation of the vibration in terms of some basis, such as structural modes or elementary radiators, and calculating the sound radiation in terms of the basis. Most choices for a basis in this situation exhibit strong coupling between the basis functions, but there is one choice which does not: Acoustic radiation modes are by definition the basis that orthogonalizes t

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40

Wan, Lin. "Matched field processing based geo-acoustic inversion in shallow water." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37266.

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Shallow water acoustics is one of the most challenging areas of underwater acoustics; it deals with strong sea bottom and surface interactions, multipath propagation, and it often involves complex variability in the water column. The sea bottom is the dominant environmental influence in shallow water. An accurate solution to the Helmholtz equation in a shallow water waveguide requires accurate seabed acoustic parameters (including seabed sound speed and attenuation) to define the bottom boundary condition. Direct measurement of these bottom acoustic parameters is excessively time consuming, ex

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41

Recalde, Salas Angela Paola. "Variability in Baleen Whale Acoustical Ecology: Implications for Optimal Monitoring Using Passive Acoustics." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/80627.

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This study aimed to improve the acoustical ecology knowledge of humpback and pygmy blue whales migrating through Geographe Bay - Western Australia. Vocalisations produced by each species were described. Vocalisation rates and detection probabilities varied between species and were dependent on temporal, behavioural and ecological parameters. Correlations between sound energy and visual observations were low for both species. This information suggests that optimal monitoring protocols for passive acoustics should be species specific.

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42

Holm, Sebastian, and Petra Lagerberg. "En effektiv lektion : En interventionsstudie kring akustikåtgärder och taluppfattbarhet hos en femteklass." Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174028.

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Detta är en interventionsstudie av hur rumsakustiken i ett klassrum påverkar en lektion beträffande tidseffektivisering samt taluppfattbarhet. Studien jämför resultat av olika mätningar och tester före och efter en rumsakustisk åtgärd i form av ett nedpendlat akustiktak. Åtgärden utförs i ett klassrum på S:t Hansskolan i Visby, i syfte att undersöka huruvida en förbättring av ljudmiljön i klassrummet kan ge positiva samhällsekonomiska effekter. De mätningar och tester som genomförts ger tillsammans en bild av klassrummets akustiska egenskaper före och efter åtgärden. Mätningarna innefattar tid

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43

Tam, Joseph. "Methods of Characterizing Gas-Metal Arc Welding Acoustics for Process Automation." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/859.

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Recent developments in material joining, specifically arc-welding, have increased in scope and extended into the aerospace, nuclear, and underwater industries where complex geometry and hazardous environments necessitate fully automated systems. Even traditional applications of arc welding such as off-highway and automotive manufacturing have increased their demand in quality, accuracy, and volume to stay competitive. These requirements often exceed both skill and endurance capacities of human welders. As a result, improvements in process parameter feedback and sensing are necessary t

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44

Kalscheuer, Jon M. "A selective automatic repeat request protocol for undersea acoustic links." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FKalscheuer.pdf.

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45

Kuster, Martin. "Inverse methods in room acoustics with under-determined data and applications to virtual acoustics." Thesis, Queen's University Belfast, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486233.

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With the advent of commercial surround sound systems there is a growing demand for 11 system that can convert existing mono and stereo recor~ings into a surround sound recording. A part of this problem is to generate the reverberation for the additional audio channels from the reverberation in the mono or stereo recording. . , In thi~ thesis, it is investigated whether a room model can be constructed from one or two room impulse responses and in which a virtual surround sound recording can then be perfonned. The estimation of the room model parameters is based on the three well-mown room acous

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46

Lee, Iljae. "Acoustic characteristics of perforated dissipative and hybrid silencers." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1117631229.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xvi, 195 p.; also includes graphics. Includes bibliographical references (p. 183-195). Available online via OhioLINK's ETD Center

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47

Jackson, Edward James. "Modelling and monitoring nonlinear acoustic phenomena in high-intensity focused ultrasound therapy." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:cea762cf-8a12-4265-b1b1-a15214c58ac3.

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High intensity focused ultrasound (HIFU) provides a wide range of noninvasive therapies ranging from drug delivery to the destruction of kidney stones. In particular, thermal ablation by HIFU presents an effective noninvasive method for the treatment of deep seated solid tumours. HIFUâs further uptake is limited by a need for improved treatment planning and monitoring. Two nonlinear acoustic phenomena that play key roles in HIFU treatment: finite amplitude effects that lead to the generation of harmonics and steepening of wavefronts, and acoustic cavitation. The former must be taken into car

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48

Pearson, Charlie. "Vertical axis wind turbine acoustics." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245256.

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Increasing awareness of the issues of climate change and sustainable energy use has led to growing levels of interest in small-scale, decentralised power generation. Small-scale wind power has seen significant growth in the last ten years, partly due to the political support for renewable energy and the introduction of Feed In Tariffs, which pay home owners for generating their own electricity. Due to their ability to respond quickly to changing wind conditions, small-scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where t

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Prentice, Philip Ridley. "Asymptotic waveforms in propeller acoustics." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282923.

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Maier, Christian. "Experimental and theoretical aero-acoustics." Thesis, Glasgow Caledonian University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.601630.

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Acoustic noise problems are encountered in many fields and are very often undesirable. The localisation of sound sources is the first step 10 reducing noise problems. In this thesis, the ability and feasibility of an acoustic camera in this regard is demonstrated The acoustic camera deals with the problem of sound sources coming from different directions by estimating the sound contributions incident to the acoustic camera. One example of an aero-acoustic noise problem is an air plane with its air foil. These cause unwanted noise due 10 the flowed air. Or another example is the current collect

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