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Дисертації з теми "Acoustical engineering"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

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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2

Terry, Jonathan. "Acoustic modeling of an enclosed reverberant environment." Diss., Online access via UMI:, 2007.

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Анотація:

Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Mechanical Engineering, 2007.<br>Includes bibliographical references.

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3

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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4

Lévesque, Sylvain. "Acoustical imaging using wave propagation tomography." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/106041.

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5

Lin, Yiqiang Farouk Bakhtier. "Acoustic wave induced convection and transport in gases under normal and micro-gravity conditions /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1795.

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6

Rinker, Brett A. "A single-sided access simultaneous solution of acoustic wave speed and sample thickness for isotropic materials of plate-type geometry." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4585.

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Анотація:

Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 17, 2009) Vita. Includes bibliographical references.

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7

Tan, Lin. "Development of micro-acoustic devices with applications of viscous effects." Diss., Online access via UMI:, 2006.

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8

Abouchakra, Rabih. "Delay estimation for transform domain acoustical echo cancellation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37254.pdf.

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9

Zlobec, S. "Linear predictive spectral shaping for acoustical echo cancellation." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23763.

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Анотація:

The purpose of this Thesis is to study adaptive acoustical echo cancellation for signals with variable-rank covariance matrices. Solutions based on the least-mean-square (LMS) algorithm are presented, with the focus being on discrete-cosine-transform-(DCT) domain finite-impulse-response (FIR) filters.<br>In speech-related applications, the covariance matrix of the reference signal is ten nearly singular, i.e., rank-deficient, which has the effect that some of the transform-domain tap coefficients stop adapting and effectively "freeze". During is low-rank phase, this frozen taps can retain any

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10

Kondis, Antonios 1980. "Acoustical wave propagation in buried water filled pipes." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30199.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.<br>Includes bibliographical references (p. 145-151).<br>This thesis presents a comprehensive way of dealing with the problem of acoustical wave propagation in cylindrically layered media with a specific application in water-filled underground pipes. The problem is studied in two stages: First the pipe is considered to be very stiff in relation to the contained fluid and then the stiffness of the pipe and the soil are taken into account. In both cases the solution process can take into acco

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11

Boerner, James R. "CaO sorption of HCl gas in an acoustic field." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/7012.

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12

Weiland, Nathan T. "Feasibility Analysis of an Open Cycle Thermoacoustic Engine with Internal Pulse Combustion." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4789.

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Анотація:

Thermoacoustic engines convert thermal energy into acoustic energy with few or no moving parts, thus they require little maintenance, are highly reliable, and are inexpensive to produce. These traits make them attractive for applications in remote or portable power generation, where a linear alternator converts the acoustic power into electric power. Their primary application, however, is in driving thermoacoustic refrigerators, which use acoustic power to provide cooling at potentially cryogenic temperatures, also without moving parts. This dissertation examines the feasibility of a new ty

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13

Farhat, Ali Farag. "Basic problems of fibre-reinforced structural components when fibres resist bending." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/31095/.

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This thesis generates certain sets of analytical and approximate solutions to a new class of partial differential equations stemming from a version of asymmetricstress elasticity theory appropriate for the study and prediction of the behaviour of fibre-reinforced materials containing fibres that resist bending. These new solutions are of theoretical and practical interest in the static and dynamic analysis of thinwalled, linearly elastic fibre-reinforced structures influenced by couple-stress and unsymmetric stress due to fibre bending stiffness. The static and free vibration solutions are con

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14

Famighetti, Tina Marie. "Investigations into the performance of the reverberation chamber of the integrated acoustics laboratory." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04022005-223652/unrestricted/famighetti%5Ftina%5Fm%5F200505%5Fmast.pdf.

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Анотація:

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2005.<br>Berthelot, Yves, Committee Member ; Cunefare, Kenneth A, Committee Chair ; Lynch, Christopher, Committee Member. Includes bibliographical references.

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15

Turek, Gabriella. "Multiple scattering from submerged bodies dissimilar acoustical properties." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17056.

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16

Sujith, R. I. "Behavior of droplets in axial acoustic fields." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/12487.

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17

Fane, de Salis Max Henry. "Acoustic sizing and location of blockages in ducts." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250484.

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18

Findlay, David A. "Three multi-track recording projects : an analysis of aesthetic and technical engineering considerations." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63956.

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19

Wurman, Peter Richard. "Anechoic chamber design and acoustical analysis of room 1-051." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14621.

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20

Epcacan, Erdal. "Underwater Channel Modeling For Sonar Applications." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612991/index.pdf.

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Анотація:

Underwater acoustic channel models have been studied in the context of communication and sonar applications. Acoustic propagation channel in an underwater environment exhibits multipath, time-variability and Doppler eects. In this thesis, multipath fading channel models, underwater physical properties and sound propagation characteristics are studied. An underwater channel model for sonar applications is proposed. In the proposed model, the physical characteristics of underwater environment are considered in a comprehensive manner. Experiments /simulations were carried out using real-life data

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21

Pendergraft, Karen Anne. "Frequency dependent acoustic transmission in nonuniform materials." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43265.

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Анотація:

A one dimensional normalized model for the frequency response of the acoustic power transmitted through nonuniform materials is developed. Using the ideal mixture model to relate acoustic velocity and impedance, this normalized model demonstrates that the power transmission characteristics are completely determined using only a composition profile and the parameters defining percent variation in acoustic velocity and impedance. For purposes of comparison, an analytically exact solution for exponential tapers is obtained.<br>Master of Science

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22

Barber, Matthew James. "Experimental investigation of normal, sonic injection through a wedge-shaped nozzle into supersonic flow." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08222009-040226/.

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23

Smith, Jerome P. "Active control of broadband acoustic radiation from structures." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-01242009-063336/.

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24

Cazzolato, Ben S. "Sensing systems for active control of sound transmission into cavities." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phc386.pdf.

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Анотація:

Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1999.<br>Copies of author's previously published articles inserted. One computer disc (CD-ROM) in plastic jacket pasted onto back cover. Bibliography: leaves 319-339. Also available electronically.

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25

Frimpong, George Kwabena. "Acoustic detection and location of partial discharges in power transformer tanks." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/15708.

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26

Martin, James Stephen. "An experimental study of the scattered near field of submerged objects with surface impedance discontinuities." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/16095.

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27

McKinnie, Douglas J. "Objective selection of critical material for subjective testing of low bit-rate audio coding systems." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29771.

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Анотація:

Perceptual low bit-rate audio coding schemes cannot be evaluated with the traditional method of measuring the difference between input signal and output signal. A valid measure is the severity of differences between input and output that are audible to human listeners, measurement of which requires well-conducted subjective testing. Test sensitivity is improved through the use of "critical" audio program. Selection of such audio material has in the past been done by subjective listening. An objective method of selecting critical material could offer many advantages, including faster and simple

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28

Petrina, Denys E. "Performance measurement of a mini thermoacoustic refrigerator and associated drivers." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FPetrina.pdf.

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29

Jung, Sungmin. "Advancement of small-scale thermoacoustic engine." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/s_jung_042109.pdf.

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Анотація:

Thesis (M. in mechanical engineering )--Washington State University, May 2009.<br>Title from PDF title page (viewed on Apr. 12, 2010). "School of Mechanical and Material Engineering." Includes bibliographical references (p. 48-49).

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30

Shi, Yinghui. "Acoustical Performance of Lined Induction Furnace in Electric Field Configuration." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627658524197215.

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31

Bekoz, Alican. "Modeling Of Plosive To Vowel Transitions." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608804/index.pdf.

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Анотація:

This thesis presents a study concerning stop consonant to vowel transitions which are modeled making use of acoustic tube model. Characteristics of the stop consonant to vowel transitions are tried to be obtained first. Therefore several transitions including fricative to vowel transitions are examined based on spectral and time related properties. In addition to these studies, x-ray snapshots, lip videos and also experiments including subjects are used to intensify the characterization, from the production and the perception side of views. As results of these studies the plosive to vowel

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32

Cameron, Peter J. K. "An acoustic countermeasure to supercavitating torpedoes." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29666.

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Анотація:

Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Rogers, P. H.; Committee Member: Ferri, A. A.; Committee Member: Ruzzene, M.; Committee Member: Smith, M. K.; Committee Member: Trivett, D.; Committee Member: Zinn, B. T. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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33

Aktas, Murat K. Farouk Bakhtier. "Thermoacoustically induced and acoustically driven flows and heat transfer in enclosures /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/313.

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34

Unal, Ayhun. "Acoustical Analysis And Design Of Horn Type Loudspeakers." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607890/index.pdf.

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Computer aided auto-construction of various types of folded horns and acoustic analysis of coupled horn and driver systems are presented in this thesis. A new procedure is developed for auto construction of folded horn shapes. Linear graph modeling technique is employed for specification of horn driver output in terms of diaphragm velocity or throat pressure. In the final phase of the design procedure, acoustic analysis of folded horns is carried by means of finite element analysis. A commercial software package MSC.ACTRAN is used to calculate directivity patterns and resulting acoustic pressu

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35

Shi, Kun. "Nonlinear acoustic echo cancellation." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26704.

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Анотація:

Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: G. Tong Zhou; Committee Co-Chair: Xiaoli Ma; Committee Member: David V. Anderson; Committee Member: James Stevenson Kenney; Committee Member: Liang Peng; Committee Member: William D. Hunt. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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36

Chen, Helen (Haiying Helen) 1975. "An acoustical study of fricatives in the speech of dysarthric speakers." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/49801.

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Анотація:

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.<br>Includes bibliographical references (leaves 55-57).<br>The goal of the present study is to better understand dysarthric speakers' speech production through quantitative acoustical analysis of the speech signals. In the past, two acoustical measurements proven to correlate with speech intelligibility in dysarthric speakers are speech rate and slope of the F2 frequency change for certain consonant vowel syllables. In this thesis, several new spectral parameters from acoustical a

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37

Peng, Shuzhi. "Acoustical wave propagator technique for structural dynamics." University of Western Australia. School of Mechanical Engineering, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0069.

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[Truncated abstract] This thesis presents three different methods to investigate flexural wave propagation and scattering, power flow and transmission efficiencies, and dynamic stress concentration and fatigue failures in structural dynamics. The first method is based on the acoustical wave propagator (AWP) technique, which is the main part described in this thesis. Through the numerical implementation of the AWP, the complete information of the vibrating structure can be obtained including displacement, velocity, acceleration, bending moments, strain and stresses. The AWP technique has been

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38

Shafiei-Tehrany, Najmeddin. "Development of small-scale thermoacoustic engine and thermoacoustic cooling demonstrator." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/N_Shafiei-Tehrany_042308.pdf.

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39

Aljets, Dirk. "Acoustic emission source location in composite aircraft structures using modal analysis." Thesis, University of South Wales, 2011. https://pure.southwales.ac.uk/en/studentthesis/acoustic-emission-source-location-in-composite-aircraft-structures-using-modal-analysis(6871e94b-6e94-4efd-b563-41b254ee27b4).html.

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Анотація:

The aim of this research work was to develop an Acoustic Emission (AE) source location method suitable for Structural Health Monitoring (SHM) of composite aircraft structures. Therefore useful key signal features and sensor configurations were identified and the proposed method was validated using both artificially generated AE as well as actual AE resulting from damage. Acoustic Emission is a phenomenon where waves are generated in stressed materials. These waves travel through the material and can be detected with suitable sensors on the surface of the structure. These stress waves are attri

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40

Coja, Michael. "Effective vibro-acoustical modelling of rubber isolators." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-266.

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41

Sangchoom, Wantana. "Fabrication of porous carbons and mesoporous silica materials for energy storage and environmental applications." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/30919/.

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Анотація:

In the context of limited availability of fossil fuel and the impact of fossil-based energy utilization to the environment, novel porous materials have been extensively investigated for applications in environmentally friendly energy generation and storage. This thesis describes work wherein porous carbons and mesoporous silica materials have been systematically studied to include new synthesis strategies, material characterization. Two main themes of this thesis are, firstly, to investigate how porosity affects the utilization of activated carbons in energy storage and gas adsorption, and sec

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42

Ehrlich, Christian. "Experimental characterization of creep damage using the nonlinearity ultrasonic technique." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42752.

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Анотація:

Welded steel pipes are an essential structural part of any power plant. Longer lifetimes and higher pressures in the pipes cause an increased probability of failure due to creep damage. To maintain safe operation, nondestructive evaluation techniques to detect creep damage are needed. Nonlinear acoustic techniques employing longitudinal waves have been proven to be sensitive to creep damage. The objective of this research is to develop a robust experimental procedure to reliably measure the acoustic nonlinearity parameter using longitudinal waves, and then to validate the procedure on samples

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43

Anders, William S. "Structural acoustic analysis of shape memory alloy hybrid composite panels." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-11012008-063243/.

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44

Cordeiro, Helio de Miranda. "Stochastic dynamical system identification applied to combustor stability margin assessment." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28167.

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Анотація:

Thesis (M. S.)--Aerospace Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Zinn, Ben; Committee Member: Ferri, Aldo; Committee Member: Lieuwen, Timothy; Committee Member: Prasad, J. V. R.; Committee Member: Ruzzene, Massimo.

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45

Reed, Darrin Kiyoshi. "Virtual audio localization with simulated early-reflections and generalized head-related transfer functions." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/reed/ReedD1209.pdf.

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Анотація:

In a natural sonic environment a listener is accustomed to hearing reflections and reverberation. It is conceived that early reflections could reduce front-back confusion in synthetic 3-D audio. This thesis describes experiments which seek to determine whether or not simulated reflections can reduce front-back confusions for audio presented with non-individualized head-related transfer functions (HRTFs) via headphones. To measure the contribution of the reflections, 13 human subjects participated in localization experiments which compared their localization ability with anechoic HRTF processin

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46

Dater, Brian Scott. "Structural acoustic optimization of an aircraft fuselage using the complex method." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17689.

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47

Clark, Robert L. "Advanced sensing techniques for active structural acoustic control /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05222007-091351/.

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48

Cepel, Raina. "The spatial cross-correlation coefficient as an ultrasonic detection statistic." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5054.

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Анотація:

Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 7, 2008) Includes bibliographical references.

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49

Allen, Nancy J. "Computation of pseudosonic logs in shallow fresh/brackish water wells: a test case in Brunswick, Georgia." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/44105.

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<p>Due to the usefulness of sonic logs in formation evaluation, efforts have been made to develop a method for calculating pseudosonic logs for wells in which sonic logs were not originally obtained. These efforts attempt to use electrical resistivity data in the calculation of pseudosonic logs by means of empirical scale functions. The purpose of this study is to examine ways of applying these relationships in relatively shallow wells where the principal formation fluid is fresh or brackish water. Data from four wells situated in Brunswick, Georgia were used in this study.</p> <p> Conventiona

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50

Locey, Lance Lester. "Analysis and Comparison of Three Acoustic Energy Density Probes." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd561.pdf.

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