So far, ideal materials have been assumed in which the sound pressure is reduced only by virtue of the spreading of the wave. A plane wave would thus show no reduction whatever of the sound pressure along its path, and a spherical wave, or the sound beam of a probe...
CITATION STYLE
Krautkrämer, J., & Krautkrämer, H. (1990). Attenuation of Ultrasonic Waves in Solids. In Ultrasonic Testing of Materials (pp. 108–116). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-662-10680-8_7
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