Journal articles: 'Acoustic surface waves'

1

Hess, P. "Surface Acoustic Waves." Applied Physics A Materials Science & Processing 61, no. 3 (September 1995): 227. http://dx.doi.org/10.1007/bf01538186.

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Schewe, Phillip F. "Surface acoustic waves (SAWs)." Physics Today 59, no. 6 (June 2006): 21. http://dx.doi.org/10.1063/1.4797385.

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Skalsky, V. R., and O. M. Mokryy. "Michelson interferometer stabilized scheme for surface acoustic waves detecting." Information extraction and processing 2019, no. 47 (December 26, 2019): 40–46. http://dx.doi.org/10.15407/vidbir2019.47.040.

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4

ARENDT, STEVE, and DAVID C. FRITTS. "Acoustic radiation by ocean surface waves." Journal of Fluid Mechanics 415 (July 25, 2000): 1–21. http://dx.doi.org/10.1017/s0022112000008636.

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We calculate the radiation of acoustic waves into the atmosphere by surface gravity waves on the ocean surface. We show that because of the phase speed mismatch between surface gravity waves and acoustic waves, a single surface wave radiates only evanescent acoustic waves. However, owing to nonlinear terms in the acoustic source, pairs of ocean surface waves can radiate propagating acoustic waves if the two surface waves propagate in almost equal and opposite directions. We derive an analytic expression for the acoustic radiation by a pair of ocean surface waves, and then extend the result to the case of an arbitrary spectrum of ocean surface waves. We present some examples for both the two-dimensional and three-dimensional regimes. Of particular note are the findings that the efficiency of acoustic radiation increases at higher wavenumbers, and the fact that the directionality of the acoustic radiation is often independent of the shape of the spectrum.

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Cormack, John M., Yurii A. Ilinskii, Evgenia A. Zabolotskaya, and Mark F. Hamilton. "Nonlinear piezoelectric surface acoustic waves." Journal of the Acoustical Society of America 151, no. 3 (March 2022): 1829–46. http://dx.doi.org/10.1121/10.0009770.

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The theory for nonlinear surface acoustic waves in crystals developed using Hamiltonian mechanics [Hamilton, Il'inskii, and Zabolotskaya, J. Acoust. Soc. Am. 105, 639 (1999)] is modified to account for piezoelectric material properties. The derived spectral evolution equations permit analysis of nonlinear surface wave propagation along a cut surface of any orientation with respect to the crystallographic axes and for piezoelectric crystals with any symmetry. Numerical simulations of waveform distortion in the particle velocity and electric field components are presented for surface wave propagation in Y-cut lithium niobate along the X- and Z-crystallographic axes. The influence of piezoelectricity is illustrated by comparing the nonlinear evolution of waveforms along a surface bounded by a vacuum (free space) and an ideal conductor (short circuit). Contributions to the nonlinearity from elasticity, piezoelectricity, electrostriction, and dielectricity are quantified separately for the two boundary conditions.

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Cecchini, Marco, Salvatore Girardo, Dario Pisignano, Roberto Cingolani, and Fabio Beltram. "Acoustic-counterflow microfluidics by surface acoustic waves." Applied Physics Letters 92, no. 10 (March 10, 2008): 104103. http://dx.doi.org/10.1063/1.2889951.

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Richards, Edward L. "Acoustic tracking of surface waves." Journal of the Acoustical Society of America 149, no. 4 (April 2021): A132. http://dx.doi.org/10.1121/10.0004764.

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Tarasenko, N., L. Jastrabik, and A. Tarasenko. "Surface Acoustic Waves in Ferroelectrics." Ferroelectrics 298, no. 1 (January 2004): 325–33. http://dx.doi.org/10.1080/00150190490423822.

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Cselyuszka, Norbert, Milan Sečujski, Nader Engheta, and Vesna Crnojević-Bengin. "Temperature-controlled acoustic surface waves." New Journal of Physics 18, no. 10 (October 6, 2016): 103006. http://dx.doi.org/10.1088/1367-2630/18/10/103006.

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10

Mayer, Andreas P. "Nonlinear surface acoustic waves: Theory." Ultrasonics 48, no. 6-7 (November 2008): 478–81. http://dx.doi.org/10.1016/j.ultras.2008.06.009.

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Destgeer, Ghulam, Byung Hang Ha, Jinsoo Park, Jin Ho Jung, Anas Alazzam, and Hyung Jin Sung. "Travelling Surface Acoustic Waves Microfluidics." Physics Procedia 70 (2015): 34–37. http://dx.doi.org/10.1016/j.phpro.2015.08.028.

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12

Vines, R. E., M. R. Hauser, and J. P. Wolfe. "Imaging of surface acoustic waves." Zeitschrift f�r Physik B Condensed Matter 98, no. 2 (June 1995): 255–71. http://dx.doi.org/10.1007/bf01324532.

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13

Bourquin, Yannyk, and Jonathan M. Cooper. "Swimming Using Surface Acoustic Waves." PLoS ONE 8, no. 2 (February 19, 2013): e42686. http://dx.doi.org/10.1371/journal.pone.0042686.

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14

Kakio, S. "Acousto-Optic Modulator Driven by Surface Acoustic Waves." Acta Physica Polonica A 127, no. 1 (January 2015): 15–19. http://dx.doi.org/10.12693/aphyspola.127.15.

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15

Hong, Stanley S., Michael S. Mermelstein, and Dennis M. Freeman. "Reflective acousto-optic modulation with surface acoustic waves." Applied Optics 43, no. 14 (May 10, 2004): 2920. http://dx.doi.org/10.1364/ao.43.002920.

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16

Sonner, Maximilian M., Farhad Khosravi, Lisa Janker, Daniel Rudolph, Gregor Koblmüller, Zubin Jacob, and Hubert J. Krenner. "Ultrafast electron cycloids driven by the transverse spin of a surface acoustic wave." Science Advances 7, no. 31 (July 2021): eabf7414. http://dx.doi.org/10.1126/sciadv.abf7414.

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Spin-momentum locking is a universal wave phenomenon promising for applications in electronics and photonics. In acoustics, Lord Rayleigh showed that surface acoustic waves exhibit a characteristic elliptical particle motion strikingly similar to spin-momentum locking. Although these waves have become one of the few phononic technologies of industrial relevance, the observation of their transverse spin remained an open challenge. Here, we observe the full spin dynamics by detecting ultrafast electron cycloids driven by the gyrating electric field produced by a surface acoustic wave propagating on a slab of lithium niobate. A tubular quantum well wrapped around a nanowire serves as an ultrafast sensor tracking the full cyclic motion of electrons. Our acousto-optoelectrical approach opens previously unknown directions in the merged fields of nanoacoustics, nanophotonics, and nanoelectronics for future exploration.

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17

Du, Liangfen, and Zheng Fan. "Anomalous refraction of acoustic waves using double layered acoustic grating." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 6 (November 30, 2023): 2396–403. http://dx.doi.org/10.3397/in_2023_0353.

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The paper proposes a double layered acoustic grating for fulfilling acoustic focusing in an anomalous direction. The acoustic grating consists of two layers of rigid panels with periodically perforated slits. By optimizing the positions of the slits on the two layers, both positive and negative refractive indices can be achieved with the phase shift tailored within [-π/2, π/2]. This allows acoustic energy of an obliquely incident plane wave to converge in a predefined focusing region in any direction. The paper predicts the wave propagation manipulated by the acoustic grating based on the surface coupling approach. Then, it discusses how to optimize the slits' positions to collimate the acoustic energy of an obliquely incident plane wave in a specific direction. Such acoustic grating has various potential applications, such as deflecting outdoor noise away from sensitive areas in building acoustics, enhancing acoustic energy in a target audience area in auditorium design, collimating acoustic surface waves, etc.

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18

Krylov, Victor V. "On the Applicability of Kramers–Kronig Dispersion Relations to Guided and Surface Waves." Acoustics 6, no. 3 (June 29, 2024): 610–19. http://dx.doi.org/10.3390/acoustics6030033.

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In unbounded media, the acoustic attenuation as function of frequency is related to the frequency-dependent sound velocity (dispersion) via Kramers–Kronig dispersion relations. These relations are fundamentally important for better understanding of the nature of attenuation and dispersion and as a tool in physical acoustics measurements, where they can be used for control purposes. However, physical acoustic measurements are frequently carried out not in unbounded media but in acoustic waveguides, e.g., inside liquid-filled pipes. Surface acoustic waves are also often used for physical acoustics measurements. In the present work, the applicability of Kramers–Kronig relations to guided and surface waves is investigated using the approach based on the theory of functions of complex variables. It is demonstrated that Kramers–Kronig relations have limited applicability to guided and surface waves. In particular, they are not applicable to waves propagating in waveguides characterised by the possibility of wave energy leakage from the waveguides into the surrounding medium. For waveguides without leakages, e.g., those formed by rigid walls, Kramers–Kronig relations remain valid for both ideal and viscous liquids. Examples of numerical calculations of wave dispersion and attenuation using Kramers–Kronig relations, where applicable, are presented for unbounded media and for waveguides formed by two rigid walls.

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19

Nie, Ruixin, Bin Wang, and Tengjiao He. "Extraction and analysis of three-dimensional sound scattering characteristics by body-generated internal waves." Journal of the Acoustical Society of America 154, no. 4_supplement (October 1, 2023): A41—A42. http://dx.doi.org/10.1121/10.0022737.

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The motion of an object submerged in a stratified fluid generates surface wakes, and simultaneously induces internal waves at the interface where there is a change in sound speed, known as the thermocline. As a result, spectral-temporal fluctuations occur in both the surface height and the distribution of sound velocity. While surface wakes primarily contribute to geometric acoustic scattering, the internal waves generated by the underwater object's motion can have diverse effects on sound propagation, leading to a prolonged acoustic impact that may have practical applications in underwater acoustic detection. This paper investigates the impact of body-generated internal waves on underwater acoustic propagation through the establishment of an “unfrozen field,” range-dependent model using the approximated Kelvin wake theory. The model allows numerical simulations to demonstrate the spatial-temporal coherence, time-frequency modulation and directional characteristics of the three-dimensional sound field scattered by the body-generated internal wave. By analyzing the influences of thermocline depth, target motion velocity and source depth, the results presented in this study indicate that the long-range acoustic propagation, modulated by the body-generated internal waves, can provide additional information for detecting moving targets.

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20

Vanneste, J., and O. Bühler. "Streaming by leaky surface acoustic waves." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467, no. 2130 (December 8, 2010): 1779–800. http://dx.doi.org/10.1098/rspa.2010.0457.

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Acoustic streaming, the generation of mean flow by dissipating acoustic waves, provides a promising method for flow pumping in microfluidic devices. In recent years, several groups have been experimenting with acoustic streaming induced by leaky surface waves: (Rayleigh) surface waves excited in a piezoelectric solid interact with a small volume of fluid where they generate acoustic waves and, as result of the viscous dissipation of these waves, a mean flow. We discuss the computation of the corresponding Lagrangian mean flow, which controls the trajectories of fluid particles and hence the mixing properties of the flows generated by this method. The problem is formulated using the averaged vorticity equation which extracts the dominant balance between wave dissipation and mean-flow dissipation. Particular attention is paid to the thin boundary layer that forms at the solid/liquid interface, where the flow is best computed using matched asymptotics. This leads to an explicit expression for a slip velocity, which includes the effect of the oscillations of the boundary. The Lagrangian mean flow is naturally separated into three contributions: an interior-driven Eulerian mean flow, a boundary-driven Eulerian mean flow and the Stokes drift. A scale analysis indicates that the latter two contributions can be neglected in devices much larger than the acoustic wavelength but need to be taken into account in smaller devices. A simple two-dimensional model of mean flow generation by surface acoustic waves is discussed as an illustration.

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21

Baev, A. R., A. L. Mayorov, M. V. Asadchaya, G. E. Konovalov, and O. S. Sergeeva. "TRANSFORMATION AND SCATTERING OF SURFACE WAVES ON THE ACOUSTIC LOAD TO ULTRASONIC EVALUATION AND MEASUREMENTS. Part 2. The object to study – solid with ledge." Devices and Methods of Measurements 9, no. 2 (June 15, 2018): 142–54. http://dx.doi.org/10.21122/2220-9506-2018-9-2-142-154.

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The lack of information about the features of processes of the surface wave's transformation into volume waves and its scattering in metal objects with ledge, slots, grooves and the others is one of the obstacles to improve of the acoustical testing reliability and widening of technical application. The aim of this work was to study of mechanism of acoustical mode's transformation and determination the laws of the fields forming of scatted volume edge wave's in solids with ledge of different geometry and to suggest direction of the study application in area of acoustical testing and measurements.The features of transformation of surface waves into edge transverse and longitudinal wave modes scatted and their fields forming in the volume of the object with ledge vs. its angle of the slope front surface side (0–135°) and a dimensionless transition radius (0–10,2) varied were studied. Theoretical analysis and experimental data shown that in general case the field of the edge transverse waves in the volume of ledge can be imagined as a superposition of the field of edge waves (scatted on ledge) and accompany waves too, radiated simultaneously with the surface waves to radiate. If dimensionless size of the ledge's transition radius lesser than 1 the resulting field of the edge transverse waves is the summary field of two sources. One of them (with small aperture) is localized in the vicinity of the place of intersection of contact surface with ledge's front side surface. As it was found, the second source of the edge transverse waves – the edge head longitudinal waves to appear in the results of transformation of surface waves on the ledge′s radius transition. The structure of the edge acoustic fields including their extremes vs. ledge's angle and its radius transition, position of the surface wave's probe were experimentally studied and theoretically analyzed.Some directions of the results of researches using are the next: а) ultrasonic testing of hard-to-make technological objects in which defects have low sound reflection; b) ultrasonic structure diagnostics of solid (specimens) set far from the ultrasonic by using edge volume transverse and longitudinal modes; c) creation of new ultrasonic arrangements to sound and to receive transverse waves of different polarization.

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22

Legusha, Fedor F., Venedikt M. Kuz’kin, Kseniya V. Razrezova, and Sergey A. Pereselkov. "Acoustic boundary layer of a solid absolutely thermally conductive surface." Radioelectronics. Nanosystems. Information Technologies. 16, no. 2 (April 25, 2024): 275–90. http://dx.doi.org/10.17725/j.rensit.2024.16.275.

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The paper presents the analysis results of formation theoretical descriptions of an acoustic boundary layer near solid absolutely thermally conductive surface, obtained by G. Kirchhoff and L.D. Landau. In both cases, the acoustic boundary layer is formed by inhomogeneous viscous and thermal waves in the wall layer of a liquid medium in contact with the surface of a solid body, from which a plane traveling sound wave is reflected. Based on the analysis, conclusions can be drawn: the analyzed problem solutions are physically sound, independent and complementary to each other. During the formation of an acoustic boundary layer, viscous and thermal waves are excited synchronously in pairs. Inside the acoustic boundary layer, each pair of inhomogeneous waves propagates towards each other. Inhomogeneous waves originate on parallel surfaces that limit the volume of the acoustic boundary layer. The analysis of the process of transformation of heat waves into additional one-dimensional inhomogeneous waves, the appearance of which in the boundary layer was predicted by G. Kirchhoff. It is shown that when interacting with the surface of the body of a traveling sound wave in the sound frequency range, these waves do not affect the formation of the boundary layer. The expressions allowing for a numerical estimation of the heat dissipation power density in the boundary layer are refined. A formula has been obtained that allows us to determine the proportion of the energy of the sound wave that is absorbed in the acoustic boundary layer. In practice, the results obtained in the article can be used, for example, in aeroacoustics to assess the dissipative properties of solid surfaces.

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23

Huang, Yuqi, Pradipta Kr Das, and Venkat R. Bhethanabotla. "Surface acoustic waves in biosensing applications." Sensors and Actuators Reports 3 (November 2021): 100041. http://dx.doi.org/10.1016/j.snr.2021.100041.

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24

Brace, John G., and Thomas S. Sanfelippo. "Flow sensing using surface acoustic waves." Journal of the Acoustical Society of America 91, no. 4 (April 1992): 2300. http://dx.doi.org/10.1121/1.403646.

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25

Shreve, W. "Signal processing using surface acoustic waves." IEEE Communications Magazine 23, no. 4 (April 1985): 6–11. http://dx.doi.org/10.1109/mcom.1985.1092553.

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26

Welna, F., and J. B. Wang. "Electron Transport via Surface Acoustic Waves." Journal of Computational and Theoretical Nanoscience 7, no. 9 (September 1, 2010): 1737–46. http://dx.doi.org/10.1166/jctn.2010.1538.

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27

Hamilton, W. A., A. G. Klein, G. I. Opat, and P. A. Timmins. "Neutron diffraction by surface acoustic waves." Physical Review Letters 58, no. 26 (June 29, 1987): 2770–73. http://dx.doi.org/10.1103/physrevlett.58.2770.

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28

Dickey, Joe. "Recent Development in Surface Acoustic Waves." Journal of the Acoustical Society of America 89, no. 1 (January 1991): 484. http://dx.doi.org/10.1121/1.400463.

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29

Yeo, Leslie Y., and James R. Friend. "Ultrafast microfluidics using surface acoustic waves." Biomicrofluidics 3, no. 1 (March 2009): 012002. http://dx.doi.org/10.1063/1.3056040.

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30

Hess, Peter. "Surface Acoustic Waves in Materials Science." Physics Today 55, no. 3 (March 2002): 42–47. http://dx.doi.org/10.1063/1.1472393.

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31

Quan, Li, and Andrea Alù. "Surface acoustic waves over bianisotropic metasurfaces." Journal of the Acoustical Society of America 145, no. 3 (March 2019): 1761. http://dx.doi.org/10.1121/1.5101447.

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32

Nakamura, Kiyoshi. "Shear-Horizontal Piezoelectric Surface Acoustic Waves." Japanese Journal of Applied Physics 46, no. 7B (July 26, 2007): 4421–27. http://dx.doi.org/10.1143/jjap.46.4421.

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33

Hamilton, Mark F., Yurii A. Il’inskii, and Evgenia A. Zabolotskaya. "Nonlinear surface acoustic waves in crystals." Journal of the Acoustical Society of America 105, no. 2 (February 1999): 639–51. http://dx.doi.org/10.1121/1.426255.

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34

Rudolph, J., R. Hey, and P. V. Santos. "Exciton transport by surface acoustic waves." Superlattices and Microstructures 41, no. 5-6 (May 2007): 293–96. http://dx.doi.org/10.1016/j.spmi.2007.03.008.

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35

Bi, B., W. S. Huang, J. Asmussen, and B. Golding. "Surface acoustic waves on nanocrystalline diamond." Diamond and Related Materials 11, no. 3-6 (March 2002): 677–80. http://dx.doi.org/10.1016/s0925-9635(01)00621-5.

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36

Babiker, M. "Recent Developments in Surface Acoustic Waves." Journal of Modern Optics 36, no. 4 (April 1989): 551. http://dx.doi.org/10.1080/09500348914550621.

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37

Ma, Yiping, W. K. Van Moorhem, and R. W. Shorthill. "Acoustic waves over a transpiring surface." Journal of the Acoustical Society of America 85, S1 (May 1989): S74. http://dx.doi.org/10.1121/1.2027130.

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38

Maradudin, Alexei A. "Surface acoustic waves on nonlinear substrates." Journal of the Acoustical Society of America 86, S1 (November 1989): S74. http://dx.doi.org/10.1121/1.2027634.

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39

Delsing, Per, Andrew N. Cleland, Martin J. A. Schuetz, Johannes Knörzer, Géza Giedke, J. Ignacio Cirac, Kartik Srinivasan, et al. "The 2019 surface acoustic waves roadmap." Journal of Physics D: Applied Physics 52, no. 35 (July 3, 2019): 353001. http://dx.doi.org/10.1088/1361-6463/ab1b04.

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40

Smith, Jerome A. "Revisiting Oceanic Acoustic Gravity Surface Waves." Journal of Physical Oceanography 45, no. 12 (December 2015): 2953–58. http://dx.doi.org/10.1175/jpo-d-14-0256.1.

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AbstractThe reintroduction of compressibility into the equations for surface gravity waves can permit mixed acoustic–gravity modes that are periodic in the vertical as well as horizontal directions. These modes interact with the bottom even in deep water, so bottom motion can excite them. Because they propagate rapidly, it has been suggested they may be useful as precursors of tsunamis. Here the equations are revisited, and, using some robust approximations, some physical understanding and interpretation of the phenomena are presented. It is posed that these new modes can alternatively be thought of as acoustic modes slightly modified by a gravity wave boundary condition at the surface, rather than as surface waves dramatically modified by compressibility. Their potential use is not diminished; indeed, this alternative perspective should help make implementation more practical.

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41

Bruno, François, Jérôme Laurent, Daniel Royer, and Michael Atlan. "Holographic imaging of surface acoustic waves." Applied Physics Letters 104, no. 8 (February 24, 2014): 083504. http://dx.doi.org/10.1063/1.4866390.

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42

Mayer, A. P. "Thermoelastic attenuation of surface acoustic waves." International Journal of Engineering Science 28, no. 10 (January 1990): 1073–82. http://dx.doi.org/10.1016/0020-7225(90)90135-6.

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43

Hudson, J. A. "Recent developments in surface acoustic waves." Journal of Sound and Vibration 139, no. 3 (June 1990): 537. http://dx.doi.org/10.1016/0022-460x(90)90685-s.

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44

Adamashvili, G. T. "Nonlinear surface acoustic waves in dielectrics." Physics Letters A 138, no. 6-7 (July 1989): 304–8. http://dx.doi.org/10.1016/0375-9601(89)90283-1.

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45

Koshevaya, S., N. Makarets, V. Grimalsky, A. Kotsarenko, and R. Perez Enríquez. "Spectrum of the seismic-electromagnetic and acoustic waves caused by seismic and volcano activity." Natural Hazards and Earth System Sciences 5, no. 2 (February 2, 2005): 203–9. http://dx.doi.org/10.5194/nhess-5-203-2005.

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Abstract. Modeling of the spectrum of the seismo-electromagnetic and acoustic waves, caused by seismic and volcanic activity, has been done. This spectrum includes the Electromagnetic Emission (EME, due to fracturing piezoelectrics in rocks) and the Acoustic Emission (AE, caused by the excitation and the nonlinear passage of acoustic waves through the Earth's crust, the atmosphere, and the ionosphere). The investigated mechanism of the EME uses the model of fracturing and the crack motion. For its analysis, we consider a piezoelectric crystal under mechanical stresses, which cause the uniform crack motion, and, consequently, in the vicinity of the moving crack also cause non-stationary polarization currents. A possible spectrum of EME has been estimated. The underground fractures produce Very Low (VLF) and Extremely Low Frequency (ELF) acoustic waves, while the acoustic waves at higher frequencies present high losses and, on the Earth's surface, they are quite small and are not registered. The VLF acoustic wave is subject to nonlinearity under passage through the lithosphere that leads to the generation of higher harmonics and also frequency down-conversion, namely, increasing the ELF acoustic component on the Earth's surface. In turn, a nonlinear propagation of ELF acoustic wave in the atmosphere and the ionosphere leads to emerging the ultra low frequency (ULF) acousto-gravity waves in the ionosphere and possible local excitation of plasma waves.

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46

Njeh, Anouar, Nabil Abdelmoula, Hartmut Fuess, and Mohamed Hédi Ben Ghozlen. "Surface Wave Propagation in Thin Silver and Aluminium Films." Zeitschrift für Naturforschung A 60, no. 11-12 (December 1, 2005): 789–96. http://dx.doi.org/10.1515/zna-2005-11-1205.

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Three kinds of acoustic waves are known: bulk waves, pseudo-surface waves and surface waves. A plane wave section of a constant-frequency surface of a film serves as a hint for the expected nature. Calculations based on slowness curves of films reveal frequency ranges where each type of acoustic waves is predominant. Dispersion curves and displacement acoustic waves are calculated and commented in each frequency interval for different coated materials. Both dispersion and sagittal elliptical displacement are sensitive and depend on diagrams mentioned above. Silver and aluminium thin films having different anisotropy ratios, namely 2.91 and 1.21, are retained for illustration.

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47

Nakagawa, Yasuhiko, and Tomokazu Matsukawa. "Interaction of Surface Acoustic Waves and Surface Polaritons." Japanese Journal of Applied Physics 26, S1 (January 1, 1987): 156. http://dx.doi.org/10.7567/jjaps.26s1.156.

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48

Warren, P. D., C. Pecorari, O. V. Kolosov, S. G. Roberts, and G. A. D. Briggs. "Characterization of surface damage via surface acoustic waves." Nanotechnology 7, no. 3 (September 1, 1996): 295–301. http://dx.doi.org/10.1088/0957-4484/7/3/020.

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49

Grelowska, Grażyna, and Eugeniusz Kozaczka. "Underwater Acoustic Imaging of the Sea." Archives of Acoustics 39, no. 4 (March 1, 2015): 439–52. http://dx.doi.org/10.2478/aoa-2014-0048.

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Abstract Acoustic waves are a carrier of information mainly in environments where the use of other types of waves, for example electromagnetic waves, is limited. The term acoustical imaging is widely used in the ultrasonic engineering to imaging areas in which the acoustic waves propagate. In particular, ultrasound is widely used in the visualization of human organs-ultrasonography (Nowicki, 2010). Expanding the concept, acoustical imaging can also be used to presentation (monitoring) the current state of sound intensity distribution leading to characterization of sources in observed underwater region. This can be represented in the form of an acoustic characteristic of the area, for example as a spectrogram. Knowledge of the underwater world which is built by analogy to the perception of the space on the Earth's surface is to be systematize in the form of images. Those images arise as a result of graphical representation of processed acoustic signals. In this paper, it is explained why acoustic waves are used in underwater imaging. Furthermore, the passive and active systems for underwater observation are presented. The paper is illustrated by acoustic images, most of them originated from our own investigation.

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50

Zaitsev, B. D., I. E. Kuznetsova, and A. A. Teplykh. "Anomalous resisto-acoustic effect for leaky surface acoustic waves." Journal of Applied Physics 97, no. 4 (February 15, 2005): 046102. http://dx.doi.org/10.1063/1.1847717.

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Journal articles on the topic 'Acoustic surface waves'

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