Journal articles: 'Sound diffraction'

1

Lyamshev, L. M., and I. A. Urusovskii. "Sound diffraction at Sierpinski carpet." Acoustical Physics 49, no. 6 (November 2003): 700–703. http://dx.doi.org/10.1134/1.1626183.

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2

Abrosimov, D. I. "Diffraction Focusing of Sound Field in an Underwater Sound Channel." Acoustical Physics 46, no. 2 (March 2000): 113. http://dx.doi.org/10.1134/1.29862.

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3

Piechowicz, J. "Sound Wave Diffraction at the Edge of a Sound Barrier." Acta Physica Polonica A 119, no. 6A (June 2011): 1040–45. http://dx.doi.org/10.12693/aphyspola.119.1040.

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4

Remhof, A., K. D. Liß, and A. Magerl. "Neutron diffraction from sound-excited crystals." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 391, no. 3 (June 1997): 485–91. http://dx.doi.org/10.1016/s0168-9002(97)00411-7.

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5

Peterson, Arnold P. G. "Sound diffraction for a spherical microphone." Journal of the Acoustical Society of America 78, no. 1 (July 1985): 266–67. http://dx.doi.org/10.1121/1.392529.

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6

Gluck, Paul. "A diffraction grating for sound waves." Physics Education 38, no. 4 (June 30, 2003): 285–86. http://dx.doi.org/10.1088/0031-9120/38/4/404.

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7

Daigle, G. A., and T. F. W. Embleton. "Diffraction of sound over curved ground." Journal of the Acoustical Society of America 79, S1 (May 1986): S20. http://dx.doi.org/10.1121/1.2023104.

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8

S. T. Park and 전동렬. "Instrumentation for Sound Interference and Diffraction Measurement." School Science Journal 3, no. 1 (February 2009): 30–36. http://dx.doi.org/10.15737/ssj.3.1.200902.30.

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9

Zhou, Ji‐Xun, Xue‐Zhen Zhang, and Yun S. Chase. "Sound diffraction by an underwater topographical ridge." Journal of the Acoustical Society of America 105, no. 2 (February 1999): 1167. http://dx.doi.org/10.1121/1.425539.

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10

Osipov, Andrey V. "On sound diffraction by an impedance wedge." Journal of the Acoustical Society of America 95, no. 5 (May 1994): 2839. http://dx.doi.org/10.1121/1.409609.

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11

Stephenson, Uwe M. "An Analytically Derived Sound Particle Diffraction Model." Acta Acustica united with Acustica 96, no. 6 (November 1, 2010): 1051–68. http://dx.doi.org/10.3813/aaa.918367.

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12

Spiesberger, John L. "Diffraction of nonsinusoidal sound in the sea." Journal of the Acoustical Society of America 115, no. 5 (May 2004): 2578–79. http://dx.doi.org/10.1121/1.4809264.

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13

Schissler, Carl, Gregor Mückl, and Paul Calamia. "Fast diffraction pathfinding for dynamic sound propagation." ACM Transactions on Graphics 40, no. 4 (August 2021): 1–13. http://dx.doi.org/10.1145/3476576.3476713.

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14

Schissler, Carl, Gregor Mückl, and Paul Calamia. "Fast diffraction pathfinding for dynamic sound propagation." ACM Transactions on Graphics 40, no. 4 (August 2021): 1–13. http://dx.doi.org/10.1145/3450626.3459751.

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15

Kleschev, A. "Sound diffraction on an elastic spheroidal shell." Transactions of the Krylov State Research Centre 3, no. 397 (August 6, 2021): 97–114. http://dx.doi.org/10.24937/2542-2324-2021-3-397-97-114.

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Object and purpose of research. This paper obtains solutions and performs estimations of characteristics of sound reflection and scattering by ideal and elastic bodies of various shapes (analytical and non-analytical) near media interface, or underwater sonic channel, or in a planar waveguide with a solid elastic bottom. Materials and methods. The harmonic signals are investigated with the method of normal waves based on the phase velocity of signal propagation, and impulse signals related to the energy transfer are studied using the method of real and imaginary sources and scatterers based on the group velocity of propagation. Main results. The scattered sound field is calculated for ideal spheroids (elongated and compressed) at fluid – ideal medium interface. The spectrum of a scattered impulse signal is calculated for a body placed in a sonic channel. First reflected impulses are found for an ideal spheroid in a planar waveguide with anisotropic bottom. Conclusion. In the studies of diffraction characteristics of bodies at media interfaces it was found that the main contribution to scattered field is given by interference of scattered fields rather than interaction of scatterers (real or imaginary). It is shown that at long distances the spectral characteristics of the channel itself have a prevalent role. When impulse sound signals in the planar waveguide are used, it is necessary to apply the method of real and imaginary sources and scatterers based on the group velocity of sound propagation.

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16

Wijewardena Gamalath, K. A. I. L., and G. L. A. U. Jayawardena. "Diffraction of Light by Acoustic Waves in Liquids." International Letters of Chemistry, Physics and Astronomy 4 (September 2013): 39–57. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.4.39.

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For the acusto-optic interactions in liquids, an equation for the diffraction light intensity was obtained in terms of Klein Cook parameter Q. With optimized parameters for Q, incident light wave length of λ = 633 nm, sound wave length of Λ = 0.1 mm, acusto-optic interaction length L=0.1 m, and refractive index of the liquid in the range of 1 to 2, the existence of ideal Raman-Nath and Bragg diffractions were investigated in terms of phase delay and incident angle. The ideal Raman-Nath diffraction slightly deviated when the Klein Cook parameter was increased from 0 to 1 for low phase delay values and for large phase delay, the characteristics of the Bessel function disappeared. Higher value of Klein Cook parameter gave Bragg diffraction and ideal Bragg diffraction was obtained for Q ~100. A slight variation of the incident angle from Bragg angle had a considerable effect on Bragg diffraction pattern. Klein Cook parameter with the change of acoustic wave frequency was investigated for liquids with refractive index in the range1.3-1.7 and their diffraction patterns were compared with practically applicable acusto-optic crystals. For acusto-optic diffractions in liquids, sound velocity plays an important role in Bragg regime with Q increasing with increasing acoustic frequency. As acoustic wave frequency exceeded 10 MHz most of the liquids reached Bragg regime before these crystals.

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17

Fu, Yangyang, Chen Shen, Xiaohui Zhu, Junfei Li, Youwen Liu, Steven A. Cummer, and Yadong Xu. "Sound vortex diffraction via topological charge in phase gradient metagratings." Science Advances 6, no. 40 (October 2020): eaba9876. http://dx.doi.org/10.1126/sciadv.aba9876.

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Wave fields with orbital angular momentum (OAM) have been widely investigated in metasurfaces. By engineering acoustic metasurfaces with phase gradient elements, phase twisting is commonly used to obtain acoustic OAM. However, it has limited ability to manipulate sound vortices, and a more powerful mechanism for sound vortex manipulation is strongly desired. Here, we propose the diffraction mechanism to manipulate sound vortices in a cylindrical waveguide with phase gradient metagratings (PGMs). A sound vortex diffraction law is theoretically revealed based on the generalized conservation principle of topological charge. This diffraction law can explain and predict the complicated diffraction phenomena of sound vortices, as confirmed by numerical simulations. To exemplify our findings, we designed and experimentally verified a PGM based on Helmholtz resonators that support asymmetric transmission of sound vortices. Our work provides previously unidentified opportunities for manipulating sound vortices, which can advance more versatile design for OAM-based devices.

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18

Fedoseeva, E. V., V. V. Bulkin, and M. V. Kalinichenko. "TECHNIQUE FOR ESTIMATING THE EFFICIENCY OF NOISE PROTECTIVE ACOUSTIC SCREENS IN THE PRESENCE OF FLAT ANTI-DIFFRACTORS." Akustika, VOLUME 40 (2021): 22–28. http://dx.doi.org/10.36336/akustika20214022.

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To increase the efficiency of acoustic screens when protecting against acoustic noise, anti-diffractors are used to reduce the diffraction level on the upper edge of the screen. The aim of the work is to refine the mathematical model used to assess noise protection efficiency with the help of an acoustic screen with an installed one-sided flat-type anti-diffractor. The well-known techniques based on the principle of the amplitude dependence of the sound wave intensity from two sources are analyzed: a point-type noise source and a secondary cylindrical wave source - the screen edge, on which the sound wave is diffracted. Taking into account that the change in the distance between the anti-diffractor and the working point in the acoustic shadow zone is associated with a change in the diffraction angle, it is proposed to evaluate the acoustic screen effectiveness by comparing the initial sound wave propagation paths. An approach to a mathematical calculation model formation is proposed, in which the diffraction point located at the intersection of two components of the wave path to the operating point is considered to be the location of the sound wave secondary source in the area of the screen upper edge: from the noise source to the flat-type anti-diffractor installed on the upper edge of the screen, and from the anti-diffractor rear edge to the operating point. Relationships that make it possible to solve the problem of analytical assessment of noise-protective acoustic screens' effectiveness when installing anti-diffractors on their upper face in the form of flat hinged panels oriented towards the acoustic shadow are obtained.

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19

Huang, Xiaofan, Haishan Zou, and Xiaojun Qiu. "Effects of the Top Edge Impedance on Sound Barrier Diffraction." Applied Sciences 10, no. 17 (August 31, 2020): 6042. http://dx.doi.org/10.3390/app10176042.

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Sound barriers can be configured with different top edge impedance to improve their noise control performance. In this paper, the integral equation method was used to calculate the sound field of a barrier with various top edge impedance, and the effects of the barrier top edge impedance on sound barrier diffraction were investigated. The simulation results showed that the noise reduction performance of a sound barrier with a soft boundary on its top edge was larger than that with a hard boundary, but there were some impedance values which, if assigned to the top edge boundary, would give the sound barrier even better noise reduction performance. It was found that the sound barrier with a good top edge impedance formed a dipole-like radiation pattern above the barrier to expand the effective range of the shadow zone. The research discoveries reported in this paper point out the potentials of using acoustics metamaterials or active control methods to implement the desired good impedance on the top edge of a sound barrier for better noise reduction.

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20

Карачун, Володимир Володимирович, Вікторія Миколаївна Мельник, and Сергій Вікторович Фесенко. "Diffraction of sound waves on a metal ring." Technology audit and production reserves 6, no. 2(32) (November 24, 2016): 4–8. http://dx.doi.org/10.15587/2312-8372.2016.85097.

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21

Cole, John E. "Diffraction of sound by a refracting cylindrical barrier." Journal of the Acoustical Society of America 81, no. 2 (February 1987): 222–25. http://dx.doi.org/10.1121/1.394940.

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22

Jin, Byung-Joo, Hyun-Sil Kim, Hyun-Ju Kang, and Jae-Seung Kim. "Sound diffraction by a partially inclined noise barrier." Applied Acoustics 62, no. 9 (September 2001): 1107–21. http://dx.doi.org/10.1016/s0003-682x(00)00094-3.

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23

Tolstoy, I. "Exact solutions for sound diffraction by truncated wedges." Journal of the Acoustical Society of America 84, S1 (November 1988): S219. http://dx.doi.org/10.1121/1.2026196.

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24

Kleshchev, Alexander. "Green’s Functions Method in Problems of Sound Diffraction." American Journal of Modern Physics 6, no. 4 (2017): 56. http://dx.doi.org/10.11648/j.ajmp.20170604.13.

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25

Habault, Dominique M., and Ulf R. Kristiansen. "Sound diffraction effects by screens in a room." Journal of the Acoustical Society of America 100, no. 4 (October 1996): 2781. http://dx.doi.org/10.1121/1.416441.

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26

Kim, Hyun-Sil, Jae-Sueng Kim, Hyun-Ju Kang, Bong-Ki Kim, and Sang-Ryul Kim. "Sound diffraction by multiple wedges and thin screens." Applied Acoustics 66, no. 9 (September 2005): 1102–19. http://dx.doi.org/10.1016/j.apacoust.2005.01.004.

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27

Shipov, N. V. "Diffraction of Cerenkov radiation by sound in solids." Radiophysics and Quantum Electronics 30, no. 4 (April 1987): 420–29. http://dx.doi.org/10.1007/bf01034969.

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28

Kamenskii, V. S. "Plane sound wave diffraction by a ribbed surface." Fluid Dynamics 31, no. 1 (January 1996): 89–96. http://dx.doi.org/10.1007/bf02230752.

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29

Sonoda, Yoshito, and Yoichi Nakazono. "Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow." Advances in Acoustics and Vibration 2012 (May 14, 2012): 1–17. http://dx.doi.org/10.1155/2012/909437.

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The optophone with no diaphragm, which can detect sound waves without disturbing flow of air and sound field, is presented as a novel sound measurement technique and the present status of development is reviewed in this paper. The method is principally based on the Fourier optics and the sound signal is obtained by detecting ultrasmall diffraction light generated from phase modulation by sounds. The principle and theory, which have been originally developed as a plasma diagnostic technique to measure electron density fluctuations in the nuclear fusion research, are briefly introduced. Based on the theoretical analysis, property and merits as a wave-optical sound detection are presented, and the fundamental experiments and results obtained so far are reviewed. It is shown that sounds from about 100 Hz to 100 kHz can be simultaneously detected by a visible laser beam, and the method is very useful to sound measurement in aeroacoustics. Finally, present main problems of the optophone for practical uses in sound and/or noise measurements and the image of technology expected in the future are shortly shown.

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30

Gužas, Danielius, R. Klimas, and V. Tričys. "Influence of Rigidity of Acoustic Shield Walls on Sound Insulation." Solid State Phenomena 113 (June 2006): 252–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.252.

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Available shields are of a certain thickness that has an influence on sound diffraction. Judging by the research results, the influence of shield thickness is insignificant if the thickness is less than the length of a sound wave. A thick shield plate or a wide shield has two edges, and this increases noise reduction at the expense of double diffraction. Solution of flat monochromatic wave diffraction has been analyzed. The compact formula of sound insulation at uniform field in front of the shield has been obtained.

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31

Rozynova, Aleksandra, and Ning Xiang. "Sound diffraction prediction of a rectangular rigid plate using the physical theory of diffraction." Journal of the Acoustical Society of America 145, no. 4 (April 2019): 2677–80. http://dx.doi.org/10.1121/1.5095872.

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32

Pisha, Louis, Siddharth Atre, John Burnett, and Shahrokh Yadegari. "Approximate diffraction modeling for real-time sound propagation simulation." Journal of the Acoustical Society of America 148, no. 4 (October 2020): 1922–33. http://dx.doi.org/10.1121/10.0002115.

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33

Cruz Calleja, Jorge Antonio. "Sound diffraction in periodic surfaces in ancient architectural structures." Journal of the Acoustical Society of America 123, no. 5 (May 2008): 3277. http://dx.doi.org/10.1121/1.2933626.

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34

Schwarzschild, Bertram. "Diffraction around the head makes hearers mislocate sound sources." Physics Today 63, no. 3 (March 2010): 16–18. http://dx.doi.org/10.1063/1.3366228.

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35

Kijimoto, Shinya, Hideo Suzuki, and Shun Oguro. "Diffraction of sound by two finite-length cascade cylinders." Journal of the Acoustical Society of Japan (E) 19, no. 4 (1998): 269–73. http://dx.doi.org/10.1250/ast.19.269.

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36

Yoshioka, Masahiro, Koichi Mizutani, and Keinosuke Nagai. "A tomographic visualization of sound fields using laser diffraction." JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN (E) 21, no. 1 (2000): 1–7. http://dx.doi.org/10.1250/ast.21.1.

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37

Tolstoy, Ivan. "Diffraction of sound by hard strips and truncated wedges." Journal of the Acoustical Society of America 82, S1 (November 1987): S61. http://dx.doi.org/10.1121/1.2024903.

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38

Windels, Filip W., V. I. Pustovoit, and O. Leroy. "Collinear acousto-optic diffraction using two nearby sound frequencies." Ultrasonics 38, no. 1-8 (March 2000): 586–89. http://dx.doi.org/10.1016/s0041-624x(99)00162-6.

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39

Parygin, V. N., and A. V. Vershubskii. "Collinear diffraction of restricted light beams by nonmonochromatic sound." Optics and Spectroscopy 93, no. 5 (November 2002): 738–45. http://dx.doi.org/10.1134/1.1523995.

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40

Tiryakioglu, Burhan. "Diffraction of sound waves by a lined cylindrical cavity." International Journal of Aeroacoustics 19, no. 1-2 (March 2020): 38–56. http://dx.doi.org/10.1177/1475472x20905043.

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In this paper, diffraction of sound waves through a lined cavity is analyzed rigorously. The inner–outer surfaces of the cavity and the base of the cavity are coated with three different absorbing linings. By using the Fourier transform technique in conjunction with the Mode-Matching method, the related boundary value problem is formulated as a Wiener–Hopf equation. In the solution, two infinite sets of unknown coefficients are involved that satisfy two infinite systems of linear algebraic equations. Numerical solution of this system is obtained for various values of the parameters of the problem. The graphical results are also presented which show that how efficiently the sound diffraction can be reduced by selection of problem parameters.

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41

Rungta, Atul, Carl Schissler, Nicholas Rewkowski, Ravish Mehra, and Dinesh Manocha. "Diffraction Kernels for Interactive Sound Propagation in Dynamic Environments." IEEE Transactions on Visualization and Computer Graphics 24, no. 4 (April 2018): 1613–22. http://dx.doi.org/10.1109/tvcg.2018.2794098.

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42

Pirinchieva, R. K. "The influence of barrier size on its sound diffraction." Journal of Sound and Vibration 148, no. 2 (July 1991): 183–92. http://dx.doi.org/10.1016/0022-460x(91)90570-a.

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43

Svensson, U. Peter, Andreas Asheim, and Sara R. Martín. "Sound propagation through an aperture with edge diffraction modeling." Journal of the Acoustical Society of America 141, no. 5 (May 2017): 3784–85. http://dx.doi.org/10.1121/1.4988332.

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44

Kuz’kin, V. M. "Sound diffraction by an inhomogeneity in an oceanic waveguide." Acoustical Physics 48, no. 1 (January 2002): 69–75. http://dx.doi.org/10.1134/1.1435392.

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45

Savino, Anthony, Jonathan Kawasaki, and Ning Xiang. "A high-resolution goniometer to measure sound diffraction patterns." Journal of the Acoustical Society of America 145, no. 3 (March 2019): 1806. http://dx.doi.org/10.1121/1.5101613.

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46

GALKIN, O. N., V. I. KRAVCHENKO, A. I. LIUSHENKO, and YU N. PARKHOMENKO. "LIGHT DIFFRACTION FROM MULTIFREQUENCY VOLUME GRATINGS IN ANISOTROPIC MEDIA." Journal of Nonlinear Optical Physics & Materials 03, no. 01 (January 1994): 55–68. http://dx.doi.org/10.1142/s0218199194000079.

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New principles of light anisotropic diffraction from complex (multifrequency) gratings have been studied theoretically and experimentally in case of two sound waves excited in the same volume. It has been shown that two different types of the intercombined multiphonon processes exist. Namely this peculiarity ensures reciprocity of the light transmission in opposite directions. Simultaneously qualitatively new (two-step) dependences of the diffracted electromagnetic wave intensity on sound frequency have been discovered.

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47

Nikitin, Pavel A., Vasily V. Gerasimov, and Ildus S. Khasanov. "Temperature Effects in an Acousto-Optic Modulator of Terahertz Radiation Based on Liquefied SF6 Gas." Materials 14, no. 19 (September 23, 2021): 5519. http://dx.doi.org/10.3390/ma14195519.

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The acousto-optic (AO) diffraction of terahertz (THz) radiation in liquefied sulfur hexafluoride (SF6) was investigated in various temperature regimes. It was found that with the increase in the temperature from +10 to +23 °C, the efficiency of the AO diffraction became one order higher at the same amplitude of the driving electrical signal. At the same time, the efficiency of the AO diffraction per 1 W of the sound power as well as the angular bandwidth of the efficient AO interaction were temperature independent within the measurement error. Increase of the resonant sound frequency with decreasing temperature and strong narrowing of the sound frequency bandwidth of the efficient AO interaction were detected.

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48

Rabinowitz, W. M., J. Maxwell, Y. Shao, and M. Wei. "Sound Localization Cues for a Magnified Head: Implications from Sound Diffraction about a Rigid Sphere." Presence: Teleoperators and Virtual Environments 2, no. 2 (January 1993): 125–29. http://dx.doi.org/10.1162/pres.1993.2.2.125.

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49

Dance, S. M., J. P. Roberts, and B. M. Shield. "Computer Prediction of Insertion Loss Due to a Single Barrier in a Non-Diffuse Empty Enclosed Space." Building Acoustics 1, no. 2 (June 1994): 125–36. http://dx.doi.org/10.1177/1351010x9400100203.

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This paper describes the development of an efficient barrier model for the prediction of sound distribution in non-diffuse empty enclosed spaces. Diffraction is modelled using an extended version of the Ondet and Barbry computer model, RAYCUB, which is a proven model used to predict sound distribution in empty and fitted non-diffuse enclosed spaces. As RAYCUB is based on geometric acoustics, it is not possible to directly model diffraction around a barrier. Diffraction around barriers is known to cause only localised, frequency dependent effects on sound distribution in acoustically complex environments such as factories. It was intended that a barrier model should impose a minimum of additional computation time on the factory noise prediction program. Three methods of approximating barriers were developed, all based upon a simplified implementation of the geometric theory of diffraction. The barrier models were tested in two configurations of an empty test space. The model REDIR gave more accurate results than the original RAYCUB model, especially at lower frequencies.

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50

Uzair, Mohammad, Xiao Li, Yangyang Fu, and Chen Shen. "Diffraction in phase gradient acoustic metagratings: multiple reflection and integer parity design." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 3 (August 1, 2021): 3167–75. http://dx.doi.org/10.3397/in-2021-2320.

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Diffraction occurs when acoustic waves are incident on periodic structures such as graded metasurfaces. While numerous interesting diffraction phenomena have been observed and demonstrated, the underlying mechanism of diffraction in these structures is often overlooked. Here we provide a generic explanation of diffraction in phase gradient acoustic metagratings and relate high-order diffractions to multiple reflections in the unit cells. As such, we reveal that the number of unit cells within the metagrating plays a dominant role in determining the diffraction patterns. It is also found that the integer parity of the metagrating leads to anomalous reflection and refraction with high efficiency. The theory is verified by numerical simulations and experiments on planar metagratings and provides a powerful mechanism to manipulate acoustic waves. We further extend the theory to cylindrical waveguides for the control of sound vortices via topological charge in azimuthal metagratings. The relevance of the theory in achieving asymmetric wave control and high absorption is also discussed and verified both numerically and experimentally.

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Journal articles on the topic 'Sound diffraction'

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