Relevant bibliographies by topics / Propagation of acoustic waves

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Academic literature on the topic 'Propagation of acoustic waves'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Propagation of acoustic waves"

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Shi, Chengzhi, Rongkuo Zhao, Yang Long, Sui Yang, Yuan Wang, Hong Chen, Jie Ren, and Xiang Zhang. "Observation of acoustic spin." National Science Review 6, no. 4 (May 11, 2019): 707–12. http://dx.doi.org/10.1093/nsr/nwz059.

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ABSTRACT Unlike optical waves, acoustic waves in fluids are described by scalar pressure fields, and therefore are considered spinless. Here, we demonstrate experimentally the existence of spin in acoustics. In the interference of two acoustic waves propagating perpendicularly to each other, we observed the spin angular momentum in free space as a result of the rotation of local particle velocity. We successfully measured the acoustic spin, and spin-induced torque acting on a designed lossy acoustic probe that results from absorption of the spin angular momentum. The acoustic spin is also observed in the evanescent field of a guided mode traveling along a metamaterial waveguide. We found spin–momentum locking in acoustic waves whose propagation direction is determined by the sign of spin. The observed acoustic spin could open a new door in acoustics and its applications for the control of wave propagation and particle rotation.
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REEDER, D. BENJAMIN, LINUS Y. S. CHIU, and CHI-FANG CHEN. "EXPERIMENTAL EVIDENCE OF HORIZONTAL REFRACTION BY NONLINEAR INTERNAL WAVES OF ELEVATION IN SHALLOW WATER IN THE SOUTH CHINA SEA: 3D VERSUS Nx2D ACOUSTIC PROPAGATION MODELING." Journal of Computational Acoustics 18, no. 03 (September 2010): 267–78. http://dx.doi.org/10.1142/s0218396x10004176.

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A joint Taiwanese-U.S. field experiment was conducted in the South China Sea (SCS), entitled the South China Sea Oceanic Processes Experiment (Taiwan)/Non-Linear Internal Waves Initiative (US) (SCOPE/NLIWI), the ocean acoustics portion of which occurred during April 12–22, 2007. The acoustics objective was to quantify the temporal and spatial variability in acoustic propagation characteristics on the continental shelf in the presence of locally-generated and trans-basin nonlinear internal waves (NLIW). Broadband (400 Hz center frequency) m-sequence signals transmitted nearly continuously by a source moored near the seabed were received by vertical line arrays at 3 and 6 km range. The acoustic transect was oriented approximately parallel to the wave fronts of the shoaling trans-basin NLIW's which had crossed the deep basin from their origin in the Luzon Strait. The acoustic propagation variability due to strong vertical and horizontal refraction induced by the very large NLIW's creates an extremely complex acoustic field as a function of time and space. Experimental data and numerical acoustic propagation modeling results are presented to (1) examine and estimate the contribution of internal wave induced horizontal refraction to the received acoustic field; and (2) to quantify the range of propagation angles relative to the internal wave fronts within which strong horizontal refraction occurs and 3D propagation models are required to accurately predict the range- and depth-dependent acoustic propagation.
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Keys, R. G. "Absorbing boundary conditions for acoustic media." GEOPHYSICS 50, no. 6 (June 1985): 892–902. http://dx.doi.org/10.1190/1.1441969.

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By decomposing the acoustic wave equation into incoming and outgoing components, an absorbing boundary condition can be derived to eliminate reflections from plane waves according to their direction of propagation. This boundary condition is characterized by a first‐order differential operator. The differential operator, or absorbing boundary operator, is the basic element from which more complicated boundary conditions can be constructed. The absorbing boundary operator can be designed to absorb perfectly plane waves traveling in any two directions. By combining two or more absorption operators, boundary conditions can be created which absorb plane waves propagating in any number of directions. Absorbing boundary operators simplify the task of designing boundary conditions to reduce the detrimental effects of outgoing waves in many wave propagation problems.
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Grechka, Vladimir, Linbin Zhang, and James W. Rector. "Shear waves in acoustic anisotropic media." GEOPHYSICS 69, no. 2 (March 2004): 576–82. http://dx.doi.org/10.1190/1.1707077.

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Acoustic transversely isotropic (TI) media are defined by artificially setting the shear‐wave velocity in the direction of symmetry axis, VS0, to zero. Contrary to conventional wisdom that equating VS0 = 0 eliminates shear waves, we demonstrate their presence and examine their properties. Specifically, we show that SV‐waves generally have finite nonzero phase and group velocities in acoustic TI media. In fact, these waves have been observed in full waveform modeling, but apparently they were not understood and labeled as numerical artifacts. Acoustic TI media are characterized by extreme, in some sense infinite strength of anisotropy. It makes the following unusual wave phenomena possible: (1) there are propagation directions, where the SV‐ray is orthogonal to the corresponding wavefront normal, (2) the SV‐wave whose ray propagates along the symmetry axis is polarized parallel to the P‐wave propagating in the same direction, (3) P‐wave singularities, that is, directions where P‐ and SV‐wave phase velocities coincide might exist in acoustic TI media. We also briefly discuss some aspects of wave propagation in low‐symmetry acoustic anisotropic models. Extreme anisotropy in those media creates bizarre phase‐ and group‐velocity surfaces that might bring intellectual delight to an anisotropic guru.
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Cui, Zhiwen, Jinxia Liu, Yujun Zhang, Kexie Wang, and Hengshan Hu. "Simulation of Monopole and Multipole Seismoelectric Logging." Advances in Acoustics and Vibration 2011 (March 27, 2011): 1–10. http://dx.doi.org/10.1155/2011/107827.

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In a fluid-saturated porous formation, acoustics and electromagnetic waves are coupled based on Pride seismoelectric theory. An exact treatment of the nonaxisymmetric seismoelectric field excited by acoustic multipole sources is presented. The frequency wavenumber domain representations of the acoustic field and associated seismoelectric field due to acoustic multipole sources are formulated. The full waveforms of acoustic waves and electric and magnetic fields in the time domain propagation in borehole are simulated by using discrete wave number integration, and frequency versus axial-wave number responses are presented and analyzed.
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Albayrak, Alp, Matthew P. Juniper, and Wolfgang Polifke. "Propagation speed of inertial waves in cylindrical swirling flows." Journal of Fluid Mechanics 879 (September 19, 2019): 85–120. http://dx.doi.org/10.1017/jfm.2019.641.

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Thermo-acoustic combustion instabilities arise from feedback between flow perturbations and the unsteady heat release rate of a flame in a combustion chamber. In the case of a premixed, swirl stabilized flame, an unsteady heat release rate results from acoustic velocity perturbations at the burner inlet on the one hand, and from azimuthal velocity perturbations, which are generated by acoustic waves propagating across the swirler, on the other. The respective time lags associated with these flow–flame interaction mechanisms determine the overall flame response to acoustic perturbations and therefore thermo-acoustic stability. The propagation of azimuthal velocity perturbations in a cylindrical duct is commonly assumed to be convective, which implies that the corresponding time lag is governed by the speed of convection. We scrutinize this assumption in the framework of small perturbation analysis and modal decomposition of the Euler equations by considering an initial value problem. The analysis reveals that azimuthal velocity perturbations in swirling flows should be regarded as dispersive inertial waves. As a result of the restoring Coriolis force, wave propagation speeds lie above and below the mean flow bulk velocity. The differences between wave propagation speed and convection speed increase with increasing swirl. A linear, time invariant step response solution for the dynamics of inertial waves is developed, which can be approximated by a concise analytical expression. This study enhances the understanding of the flame dynamics of swirl burners in particular, and contributes physical insight into the inertial wave dynamics in general.
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Hawwa, Muhammad A. "Sound Propagation in a Duct with Wall Corrugations Having Square-Wave Profiles." Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/516982.

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Acoustic wave propagation in ducts with rigid walls having square-wave wall corrugations is considered in the context of a perturbation formulation. Using the ratio of wall corrugation amplitude to the mean duct half width, a small parameter is defined and a two levels of approximations are obtained. The first-order solution produces an analytical description of the pressure field inside the duct. The second-order solution yields an analytical estimate of the phase speed of waves transmitting through the duct. The effect of wall corrugation density on acoustic impedance and wave speeds is highlighted. The analysis reveals that waves propagating in a duct with square-wave wall corrugation are slower than waves propagating in a duct with sinusoidal wave corrugation having the same corrugation wavelength.
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KRYLOV, VICTOR V. "PROPAGATION OF LOCALIZED VIBRATION MODES ALONG EDGES OF IMMERSED WEDGE-LIKE STRUCTURES: GEOMETRICAL-ACOUSTICS APPROACH." Journal of Computational Acoustics 07, no. 01 (March 1999): 59–70. http://dx.doi.org/10.1142/s0218396x99000060.

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The theory of antisymmetric localized elastic modes propagating along edges of immersed wedge-like structures is developed using the geometrical-acoustics approach to the description of flexural waves in elastic plates of variable thickness. The velocities of these modes, often called wedge acoustic waves, are calculated using solutions of the dispersion equation of the Bohr-Sommerfeld type following from the geometrical-acoustics description of localized wedge modes. In a subsonic regime of wave propagation, i.e. for wedge modes slower than sound in liquid, the influence of liquid loading results in significant decrease of wedge wave velocities in comparison with their values in vacuum. This decrease is a nonlinear function of a wedge apex angle θ and is more pronounced for small values of θ. In a supersonic regime of wedge wave propagation, a smaller decrease in velocities takes place and the waves travel with the attenuation due to radiation of sound into the surrounding liquid. The comparison is given with the recent experimental investigations of wedge waves carried out by independent researchers.
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Hovem, Jens M. "Acoustic waves in finely layered media." GEOPHYSICS 60, no. 4 (July 1995): 1217–21. http://dx.doi.org/10.1190/1.1443850.

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The propagation of acoustic waves through a periodically stratified medium is examined theoretically and experimentally with the purpose of determining how the velocity of the composite material depends on the periodicity structure, the material properties, and frequency. A numerical simulation of a recently published experiment shows that the propagator method gives results in close agreement with the experimental observations. Using eigenvalue analysis, an expression for the sound velocity and scattering loss is calculated for all frequencies. The results show that, for frequencies lower than a certain critical (or limiting) frequency, the propagation is dispersive and no loss occurs. Above this frequency the waves are evanescent and suffer scattering loss at each interface. An expression for the limiting frequency is derived which takes into account the contrast in impedance between the two media.
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Chen, Yong, Yiyong Huang, Xiaoqian Chen, and Dengpeng Hu. "Axisymmetric Wave Propagation in Uniform Gas Flow Confined by Rigid-Walled Pipeline." Journal of Computational Acoustics 22, no. 04 (September 18, 2014): 1450014. http://dx.doi.org/10.1142/s0218396x14500143.

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This paper deals with the axisymmetric acoustic wave propagating along the perfect gas in the presence of a uniform flow confined by a rigid-walled pipeline. Under the linear acoustic assumption, mathematical formulation of wave propagation is deduced from the conservations of mass, momentum and energy. Meanwhile a method based on the Fourier–Bessel theory is introduced to solve the problem. Comprehensive comparisons of the phase velocity and wave attenuation between the non-isentropic and isentropic acoustic waves are provided. Meanwhile the effects of flow profile, acoustic frequency, and pipeline radius are analyzed.
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Dissertations / Theses on the topic "Propagation of acoustic waves"

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Uzoegbo, Herbert Chidozie. "Propagation of acoustic waves in concrete." Thesis, King's College London (University of London), 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321500.

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Reese, Owein. "Homogenization of acoustic wave propagation in a magnetorheological fluid." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0430104-101629.

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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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Schlottmann, Robert Brian. "A path integral formulation of elastic wave propagation /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004372.

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Seale, Michael David. "Propagation of guided acoustic waves in composite media." W&M ScholarWorks, 1996. https://scholarworks.wm.edu/etd/1539623884.

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Composite materials are being more widely used today by aerospace, automotive, and a number of other commercial industries because of their advantages over conventional metals. Composites are finding applications ranging from bicycle frames to the proposed High-Speed Civil Transport (HSCT). Determining the response to a variety of damage mechanisms is necessary for a complete understanding of the total use environment of composite structures. The objective of the research presented here is to provide a method of quantifying the amount of damage in composite materials for a number of different damage scenarios. Components which have non-visible damage, but have degraded performance, are of interest. at this level of damage, the safety margin designed into the structure may be compromised.;Nondestructive Evaluation (NDE) is a field of measurement physics where energy is imparted to a material and information is obtained from observing how the energy interacts with the system. Many different forms of energy can be used to obtain useful information from these measurements: acoustic, thermal, x-ray, optical, and electromagnetic. Among the many various techniques available, ultrasonic Lamb waves offer a convenient method of evaluating these composite materials. as a material is damaged, the elastic parameters of the structure change. Since the Lamb wave velocity depends on these properties, an effective tool exists to monitor damage in composites by measuring the velocity of these waves. Additionally, Lamb wave measurements are beneficial because they can propagate over long distances and are sensitive to the desired in-plane elastic properties of the material.;Presented in this study are the results involving the investigation of a variety of damage mechanisms (fatigue, thermal, and thermal-mechanical) using the Lamb wave technique. Two fatigue studies were conducted which showed that the change in modulus and change in velocity of the Lamb wave squared follow the same general trend. The Lamb wave velocity was also observed to decrease with increasing crack density. For the thermal damage study, the results showed that the velocity of the lowest order symmetric Lamb mode dropped significantly for extended thermal damage. When the experimental results were compared to model calculations, good agreement was observed for both fatigue and thermal damage. Finally, for thermal-mechanical damage, it was found that the Lamb wave technique was also able to predict a local defect in a specimen, which was later found to have a large delamination zone.;The Lamb wave velocity is a quantitative measurement and it has been shown by this work to be an effective tool in monitoring different types of damage in composites. Since the Lamb wave velocity depends on a variety of material properties, an ideal technique exists to monitor composites as damage is incurred. With the continued development of damage assessment techniques such as the Lamb wave method, the safety of such structures can be assured.
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Furnell, G. D. "A study of acoustic wave propagation within curved ducting systems /." Title page, table of contents and abstract only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phf987.pdf.

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Norbert, Čeljuska. "Novel metamaterial stuctures for non-conventional propagation of acoustic waves." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=95690&source=NDLTD&language=en.

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Metamaterials are artificial media composed of subwavelength unit cells, specifically engineered to exhibit unusual properties in relation to wave propagation, generally not found in nature. Most research in this area has been dedicated to electromagnetic metamaterials, In this thesis we present results in a new multidisciplinary field of metamaterials in acoustics and realization of non-conventional wave propagation applying novel metamaterial unit cells. The scientific contribution of this dissertation comprises three new types of wave propagation modes and their control with newly designed metamaterial unit cells. In the thesis, a novel class of compressibility-near-zero (CNZ) acoustic propagation, achieved by using Helmholtz resonators, is theoretically analyzed and experimentally demonstrated. A closed analytical formula for the effective compressibility of the proposed unit cell is presented, and the existence of two frequencies which may support CNZ propagation is shown. Furthermore, a new unit cell with effective mass density with Lorentzian type behavior is proposed, a closed analytical formula for its effective mass density is found, and the evanescent, left-handed propagation and density-near-zero acoustic wave propagation are demonstrated. In the end it is demonstrated for the first time that a surface acoustic wave propagating at the boundary between a fluid and a hard grooved surface can be efficiently controlled by varying only the temperature of the fluid, while the geometry of the grooved surface remains unchanged. This opens up a way for a number of new applications, all easily tunable by external means. Following theoretical considerations, we demonstrate temperature-controlled sound trapping and its applications in acoustic spectral analysis and temperature sensing. We also present a temperature-controlled gradient refractive index (GRIN) acoustic medium and apply it to achieve temperature-controlled acoustic focusing.
Метаматеријали су вештачки медијуми састављени од јединичних ћелија мањих од таласне дужине, пројектовани на посебан начин да при пропагацији таласа испољавају необичне особине које се иначе не срећу у природи. Већина истраживања у овој области фокусира се на електромагнетске метаматеријале. У овој дисертацији презентовани су резултати у новом мултидисциплинарном пољу метаматеријала у акустици и реализација нове неконвенционалне пропагације таласа применом јединичних ћелија метаматеријала. Научни допринос ове дисертације су три нова типа модова пропагације таласа и њихова контрола новим пројектованим јединичним ћелијама метаматеријала. У дисертацији је теоријски анализирана и експериментално показана нова класа CNZ (енг. compressibility-near-zero) акустичке пропагације постигнуте Хелмхолцовим резонатором. Дата је затворена аналитичка формула за ефективну стишљивост јединичне ћелије, а затим је показано да постоје две фреквенције које подржавају CNZ пропагацију. Такође, предложена је нова јединична ћелија са ефективном густином Лоренцовог типа, изведена је затворена аналитичка формула за њену ефективну густину и показане су „левoрука“, еванесцентна и DNZ (енг. density-near-zero) пропагација акустичких таласа. На крају, по први пут је показано да се површински акустични талас који се простире на граници између флуида и чврсте избраздане површи може ефикасно контро-лисати само променом температуре, док геометрија избраздане површи остаје непромењена. Ово отвара могућности за бројне нове примене где је потребна лакоћа екстерног подешавања. Пратећи изложену теорију, демонстрирано је заробљавање звука контролисано температуром, као и његова примена у акустичкој спектралној анализи и мерењу темпе-ратуре. Такође, презентован је акустички медијум са температуром кон-тролисаним градијентом индекса преламања, као и његова примену у температурно контролисаном акустичком фокусирању.
Metamaterijali su veštački medijumi sastavljeni od jediničnih ćelija manjih od talasne dužine, projektovani na poseban način da pri propagaciji talasa ispoljavaju neobične osobine koje se inače ne sreću u prirodi. Većina istraživanja u ovoj oblasti fokusira se na elektromagnetske metamaterijale. U ovoj disertaciji prezentovani su rezultati u novom multidisciplinarnom polju metamaterijala u akustici i realizacija nove nekonvencionalne propagacije talasa primenom jediničnih ćelija metamaterijala. Naučni doprinos ove disertacije su tri nova tipa modova propagacije talasa i njihova kontrola novim projektovanim jediničnim ćelijama metamaterijala. U disertaciji je teorijski analizirana i eksperimentalno pokazana nova klasa CNZ (eng. compressibility-near-zero) akustičke propagacije postignute Helmholcovim rezonatorom. Data je zatvorena analitička formula za efektivnu stišljivost jedinične ćelije, a zatim je pokazano da postoje dve frekvencije koje podržavaju CNZ propagaciju. Takođe, predložena je nova jedinična ćelija sa efektivnom gustinom Lorencovog tipa, izvedena je zatvorena analitička formula za njenu efektivnu gustinu i pokazane su „levoruka“, evanescentna i DNZ (eng. density-near-zero) propagacija akustičkih talasa. Na kraju, po prvi put je pokazano da se površinski akustični talas koji se prostire na granici između fluida i čvrste izbrazdane površi može efikasno kontro-lisati samo promenom temperature, dok geometrija izbrazdane površi ostaje nepromenjena. Ovo otvara mogućnosti za brojne nove primene gde je potrebna lakoća eksternog podešavanja. Prateći izloženu teoriju, demonstrirano je zarobljavanje zvuka kontrolisano temperaturom, kao i njegova primena u akustičkoj spektralnoj analizi i merenju tempe-rature. Takođe, prezentovan je akustički medijum sa temperaturom kon-trolisanim gradijentom indeksa prelamanja, kao i njegova primenu u temperaturno kontrolisanom akustičkom fokusiranju.
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Ead, Richard M. "Predicting the effects of sea surface scatter on broad band pulse propagation with an ocean acoustic parabolic equation model." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FEad.pdf.

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Wojcik, Stefanie E. "Effects of internal waves and turbulent fluctuations on underwater acoustic propagation." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-030906-152505/.

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Nagaraj, Nagaraj. "Effects of Dissipation on Propagation of Surface Electromagnetic and Acoustic Waves." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115126/.

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With the recent emergence of the field of metamaterials, the study of subwavelength propagation of plane waves and the dissipation of their energy either in the form of Joule losses in the case of electomagnetic waves or in the form of viscous dissipation in the case of acoustic waves in different interfaced media assumes great importance. with this motivation, I have worked on problems in two different areas, viz., plasmonics and surface acoustics. the first part (chapters 2 & 3) of the dissertation deals with the emerging field of plasmonics. Researchers have come up with various designs in an efort to fabricate efficient plasmonic waveguides capable of guiding plasmonic signals. However, the inherent dissipation in the form of Joule losses limits efficient usage of surface plasmon signal. a dielectric-metal-¬dielectric planar structure is one of the most practical plasmonic structures that can serve as an efficient waveguide to guide electromagnetic waves along the metal-dielectric boundary. I present here a theoretical study of propagation of surface plasmons along a symmetric dielectric-metal-dielectric structure and show how proper orientation of the optical axis of the anisotropic substrate enhances the propagation length. an equation for propagation length is derived in a wide range of frequencies. I also show how the frequency of coupled surface plasmons can be modulated by changing the thickness of the metal film. I propose a Kronig-Penny model for the plasmonic crystal, which in the long wavelength limit, may serve as a homogeneous dielectric substrate with high anisotropy which do not exist for natural optical crystals. in the second part (chapters 4 & 5) of the dissertation, I discuss an interesting effect of extraordinary absorption of acoustic energy due to resonant excitation of Rayleigh waves in a narrow water channel clad between two metal plates. Starting from the elastic properties of the metal plates, I derive a dispersion equation that gives resonant frequencies, which coincide with those observed in the experiment that was performed by Wave Phenomena Group at Polytechnic University of Valencia, Spain. Two eigenmodes with different polarizations and phase velocities are obtained from the dispersion equation. at certain critical aperture of the channel, an interesting cutoff effect, which is unusual for an acoustic wave, is observed for one of the eigenmodes with symmetric distribution of the pressure field. the theoretical prediction of the coupling and synchronization of Rayleigh waves strongly supports the experimentally measured shift of the resonant frequencies in the transmission spectra with channel aperture. the observed high level of absorption may find applications in designing metamaterial acoustic absorbers.
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Books on the topic "Propagation of acoustic waves"

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Powers, John P. Acoustic propagation modeling using MATLAB. Monterey, Calif: Naval Postgraduate School, 1993.

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Wolfe, J. P. Imaging phonons: Acoustic wave propagation in solids. Cambridge, U.K: Cambridge University Press, 1998.

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H, Schultz Martin, ed. Numerical ocean acoustic propagation in three dimensions. Singapore: World Scientific, 1995.

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Nazarov, V. E. Nonlinear acoustic waves in micro-inhomogeneous solids. Hoboken, NJ: John Wiley & Sons Inc., 2015.

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Sound propagation: An impedance based approach. Singapore: Wiley, 2010.

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Frisk, George V. Ocean and seabed acoustics: A theory of wave propagation. Englewood Cliffs, N.J: PTR Prentice Hall, 1994.

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Baumeister, Kenneth J. Acoustic propagation in curved ducts with extended reacting wall treatment. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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Baylosis, Benito E. Acoustic imaging of ultrasonic wave propagation. Monterey, Calif: Naval Postgraduate School, 1994.

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Hariharan, S. I. Nonlinear acoustic wave propagation in atmosphere. Hampton, Va: Langley Research Center, 1986.

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Rostafiński, Wojciech. Monograph on propagation of sound waves in curved ducts. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1991.

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Book chapters on the topic "Propagation of acoustic waves"

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Weill, Alain. "Acoustic Waves, Propagation." In Encyclopedia of Remote Sensing, 11–13. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-0-387-36699-9_2.

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Weder, Ricardo. "Propagation of Acoustic Waves." In Spectral and Scattering Theory for Wave Propagation in Perturbed Stratified Media, 3–85. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-4430-1_2.

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Garrett, Steven L. "One-Dimensional Propagation." In Understanding Acoustics, 453–512. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_10.

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Abstract Having already invested in understanding both the equation of state and the hydrodynamic equations, only straightforward algebraic manipulations will be required to derive the wave equation, justify its solutions, calculate the speed of sound in fluids, and derive the expressions for acoustic intensity and the acoustic kinetic and potential energy densities of sound waves. The “machinery” developed to describe waves on strings will be sufficient to describe one-dimensional sound propagation in fluids, even though the waves on the string were transverse and the one-dimensional waves in fluids are longitudinal. These results are combined with the thermal and viscous penetration depths to calculate the frequencies and quality factors in standing wave resonators. The coupling of those resonators to loudspeakers will be examined. The introduction of reciprocal transducers that are linear, passive, and reversible will allow absolute calibration of transducers using only electrical measurements (i.e., currents and voltages) by the reciprocity method, if the acoustic impedance that couples the source and receiver is calculable. Reflection and transmission at junctions between multiple ducts and other networks will be calculated and applied to the design of filters. The behavior of waves propagating through horns will provide useful impedance matching but introduce a low-frequency cut-off.
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Rubenstein, David, and Michael H. Brill. "Acoustic Variability Due to Internal Waves and Surface Waves in Shallow Water." In Ocean Variability & Acoustic Propagation, 215–28. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3312-8_16.

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Andronov, Ivan V. "Acoustic Waves Tunnelling into Whispering Gallery Waves." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003, 90–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_14.

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Murphy, Joseph E., and Stanley A. Chin-Bing. "A Seismo-Acoustic Finite Element Model for Underwater Acoustic Propagation." In Shear Waves in Marine Sediments, 463–70. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3568-9_53.

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Rawer, Karl. "The real ionosphere: Irregularities and acoustic-gravity waves." In Wave Propagation in the Ionosphere, 159–90. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3665-7_11.

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Dhia, Anne-Sophie Bonnet-Ben, and Karim Ramdani. "Diffraction by a Locally Perturbed Acoustic Grating." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003, 221–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_35.

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Sentis, Rémi. "Laser Propagation: Coupling with Ion Acoustic Waves." In Mathematical Models and Methods for Plasma Physics, Volume 1, 73–134. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-03804-9_3.

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Lurton, Xavier. "Underwater acoustic wave propagation." In An Introduction to Underwater Acoustics, 13–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13835-5_2.

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Conference papers on the topic "Propagation of acoustic waves"

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Qin, B. "Attenuating Pseudo S-waves in Acoustic Anisotropic Wave Propagation." In 77th EAGE Conference and Exhibition 2015. Netherlands: EAGE Publications BV, 2015. http://dx.doi.org/10.3997/2214-4609.201413135.

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Ji, Chunhua, Robert X. Gao, Zhaoyan Fan, Kenneth Liang, and Jahir Pabon. "Adaptive Control of Acoustic Waves in Flexible Structure." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3931.

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An active cascading control method for suppressing acoustic waves propagating along a flexible structure is proposed, developed, and experimentally evaluated on a hanging steel beam. To ensure satisfactory performance, multiple control points are set up along the wave propagation path. A coupled feed forward control algorithm was developed to suppress both the head wave from the transmitter and the coupling waves from the wave-cancelling actuators. An equation error adaptive system identification approach was taken to extract system dynamics and avoid mode uncertainty/truncation under high frequencies. To determine the optimal controller weights and minimize wave energy, an NLMS adaptive algorithm was realized, based on the obtained models. An experimental setup, composed of a steel beam as the wave propagation medium and five cascading control stations, was developed. Experimental results have shown that, under both wide and narrow bandwidth conditions, wave energy suppression of over 98.7% has been achieved.
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Polikarpova, Nataliya V., Evgeny A. Djakonov,, and Vitaly B. Voloshinov. "Acousto-optic investigation of acoustic waves propagation in anisotropic medium." In INTERNATIONAL CONGRESS ON ULTRASONICS: Gdańsk 2011. AIP, 2012. http://dx.doi.org/10.1063/1.3703150.

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Peng, Wei, Yiao-Tee Hsia, and Julius Hohlfeld. "Modeling of Acoustic Wave Propagation HAMR Media." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63913.

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In multi-layered solids, an acoustic wave is partially reflected and partially transmitted at boundaries, which renders a too complex wave pattern to be predicted with analytical models. A Finite Element Method (FEM) based numerical model is developed to predict the acoustic wave propagation in multi-layered solids, where an ANSYS acoustic fluid element is adopted to solve this problem. The model is applied to study the pump-probe transient reflectivity measurements on Heat Assisted Magnetic Recording (HAMR) media, where the thermo-elastic waves are isolated and then subtracted from the composite reflectivity change measurement. As a result, the reflectivity change caused by the thermal decay is separated from the thermo-elastic waves, allowing a more accurate prediction and measurement of the thermal properties of HAMR media.
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Adamova, M. E., E. A. Zhukov, and A. V. Kaminsky. "Propagation of Bulk Acoustic Waves in Rhombohedral Crystals." In 2018 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon). IEEE, 2018. http://dx.doi.org/10.1109/fareastcon.2018.8602629.

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Soczkiewicz, Eugeniusz. "Propagation of acoustic waves in randomly inhomogeneous media." In Acousto-Optics and Applications VI, edited by Antoni Sliwinski, Piotr Kwiek, Bogumil B. J. Linde, and A. Markiewicz. SPIE, 1995. http://dx.doi.org/10.1117/12.222771.

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Coulouvrat, François. "Sources and propagation of atmospherical acoustic shock waves." In NONLINEAR ACOUSTICS STATE-OF-THE-ART AND PERSPECTIVES: 19th International Symposium on Nonlinear Acoustics. AIP, 2012. http://dx.doi.org/10.1063/1.4749292.

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Lei, Zhiheng, and Bakhtier Farouk. "Generation and Propagation of Thermally Induced Acoustic Waves in Supercritical Carbon Dioxide." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-44082.

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The generation and propagation of thermally induced acoustic waves in a confined layer of supercritical carbon dioxide are investigated by solving the fully compressible unsteady Navier-Stokes equations. These waves are generated by rapidly heating/cooling a sidewall. Due to the high compressibility, thermally induced acoustic waves are generated along any heated/cooled surface. The acoustic wave reflects from the opposing sidewall and continues to reverberate between the opposing walls. Even though supercritical fluids have high thermal conductivity, heat diffusion is slow. However, the temperature of the layer of the supercritical carbon dioxide is found to increase due to the dissipation of the acoustic energy. Ideal-gas law does not apply to supercritical fluids. Furthermore the internal energy is also not a function of temperature only. The above property variation effects are considered in the present paper.
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DUDA, A., and T. PASZKIEWICZ. "SPECIFIC PROPAGATION DIRECTIONS OF ACOUSTIC WAVES IN MEDIA OF VARIOUS ACOUSTIC SYMMETRIES." In Proceedings of the 7th International School on Theoretical Physics. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704474_0038.

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Fleury, Romain, Dimitrios Sounas, and Andrea Alu. "Magnetless circulators for electromagnetic and acoustic waves." In 2016 10th European Conference on Antennas and Propagation (EuCAP). IEEE, 2016. http://dx.doi.org/10.1109/eucap.2016.7481951.

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Reports on the topic "Propagation of acoustic waves"

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Bradley, Charles E. Acoustic Bloch Wave Propagation in a Periodic Waveguide. Fort Belvoir, VA: Defense Technical Information Center, July 1991. http://dx.doi.org/10.21236/ada244068.

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Muhlestein, Michael, and Carl Hart. Numerical analysis of weak acoustic shocks in aperiodic array of rigid scatterers. Engineer Research and Development Center (U.S.), October 2020. http://dx.doi.org/10.21079/11681/38579.

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Nonlinear propagation of shock waves through periodic structures have the potential to exhibit interesting phenomena. Frequency content of the shock that lies within a bandgap of the periodic structure is strongly attenuated, but nonlinear frequency-frequency interactions pumps energy back into those bands. To investigate the relative importance of these propagation phenomena, numerical experiments using the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation are carried out. Two-dimensional propagation through a periodic array of rectangular waveguides is per-formed by iteratively using the output of one waveguide as the input for the next waveguide. Comparison of the evolution of the initial shock wave for both the linear and nonlinear cases is presented.
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Young, Jacey, Alexander Heifetz, and Xin Huang. Simulation of Wave Propagation for Nuclear Facility Acoustic Communications. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1480538.

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Preston, Leiph A. TDAAPS 2: Acoustic Wave Propagation in Attenuative Moving Media. Office of Scientific and Technical Information (OSTI), August 2016. http://dx.doi.org/10.2172/1431437.

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Caruthers, Jerald W. Analysis of Acoustic Propagation and Scattering Data Across Ship Wakes. Fort Belvoir, VA: Defense Technical Information Center, September 2010. http://dx.doi.org/10.21236/ada542125.

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Wu, Ru-Shan, and Xiao-Bi Xie. Study of Ocean Bottom Interactions with Acoustic Waves by a New Elastic Wave Propagation Algorithm and an Energy Flow Analysis Technique. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada628511.

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Wu, Ru-Shan, and Xiao-Bi Xie. Study of Ocean Bottom Interactions with Acoustic Waves by a New Elastic Wave Propagation Algorithm and an Energy Flow Analysis Technique. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada630870.

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King, M. S. Acoustic Wave Propagation in Frozen and Clathrate Hydrate-Bearing Sediments. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/123291.

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Preston, Leiph. Paracousti-UQ: A Stochastic 3-D Acoustic Wave Propagation Algorithm. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1395209.

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Yamamoto, Tokuo. Acoustic Wave Propagation, Scattering and Attenuation in Sediments in Shallow Oceans. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada629533.

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