Experimental measurement of the acoustic sensitivity kernel

TitleExperimental measurement of the acoustic sensitivity kernel
Publication TypeJournal Article
Year of Publication2013
AuthorsRoux P, Marandet C, Nicolas B, Kuperman WA
JournalThe Journal of the Acoustical Society of America
Date Published2013/06
Keywordsacoustic field; acoustic intensity measurement; acoustic wave propagation; acoustic wave reflection; acoustic wave scattering; structural acoustics

In the Born approximation, the acoustic scattering from a spherical obstacle of a size comparable to the acoustic wavelength can be evaluated in the framework of the sensitivity kernel approach, which describes the relationship between the pressure-field fluctuation and the position of a local change in the propagation medium. The spatial structure of the sensitivity kernel is here investigated through experimental observations made in a water tank at the ultrasonic scale and compared to an analytical model. The pattern of the sensitivity kernel is discussed in the case of a source-to-receiver wave field that includes a direct path and one surface reflection.

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