Acoustic material characterization by laser interferometry
نویسندگان
چکیده
منابع مشابه
Characterization of Acoustic Sources by Optical Feedback Interferometry
Sound can be described as the propagation of pressure variations in compressible media that involves compression and expansion and induces a change in the density of the medium. This change in acoustic pressure as it induces a change of the refractive index can be measured by optical methods, the most recent being the optical feedback interferometry. With this technique, a laser diode is beamin...
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Mapping the wind over vast ocean areas is a very important practical problem, especially at high winds. Satellite measurements using scattering of electromagnetic waves from the rough ocean surface are extremely useful; however, the cross section for this scattering saturates at high winds, when wind speed measurements are most valuable. On the other hand, the same mechanism that precludes use ...
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2 Department of Physics, Texas A & M University, College Station, Texas 77843-4242, U.S.A. 3 General Physics Institute, Moscow 117942, Russia. 4 To whom correspondence should be addressed. E-mail: [email protected] High-amplitude nonlinear surface acoustic waves (SAWs) generated by laser pulses were observed in polycrystalline material (stainless steel), and the nonlinear acoustic p...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1995
ISSN: 0001-4966
DOI: 10.1121/1.414212