A model for predicting acoustic material signatures

• R. D. Weglein

  Hughes Research Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265

抄録

Unique acoustic material signatures (AMS) may be obtained in the reflection acoustic microscope. The proposed model shows that they result from interference between two components reradiated into the immerson fluid at the materials critical Rayleigh angle ϑR. The characteristic period ΔzN of this interference signature varies as the square of the Rayleigh wave velocity and is empirically given by ΔzN=λR/sinϑR, where λR is the Rayleigh wavelength. Materials covering a greater than 3 : 1 velocity range agree well with this physical model. Substitution of the longitudinal wave velocity in the expression extends the range of measurable AMS to acoustically slower materials. A variety of applications for AMS is suggested.

収録刊行物

• Applied Physics Letters

  Applied Physics Letters 34 (3), 179-181, 1979-02-01

  AIP Publishing

キーワード

• Physics and Astronomy (miscellaneous)

詳細情報

• CRID: 1361418520069937280
• NII論文ID: 30015793073
• DOI: 10.1063/1.90741
• ISSN: 10773118
• ISSN: 00036951
• Web Site: https://pubs.aip.org/aip/apl/article-pdf/34/3/179/18438467/179_1_online.pdf
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