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Experimental and numerical investigation of shock wave propagation in the post focal region of a focused sound field

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Experimental and numerical investigations of the shock propagation in the post focal region of a highly intense focusing source are carried out. Close agreement between the measured data and the simulations which use the KZK equation with the equivalent boundary condition is found. Both measurements and simulations indicate that there is a connection between the shock and the signal generated at the center of the source, and that it is superposed on a "background signal" which is connected to the signal generated near the edge of the source. The measurements and simulations also indicate that the shock speed may depend upon the source amplitude. Finally, the simulations show that the magnitude of the shock at some distance from the focal point (measured along the symmetry axis) reaches a level of saturation.
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Document Type: Research Article

Publication date: 01 November 1997

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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