Frank A. Boyle
Nicholas P. Chotiros
Appl. Res. Labs., Univ. of Texas at Austin, P.O. Box 8029, Austin, TX 78713-8029
A technique based on acoustic reciprocity has recently been used to calculate backscattering strengths of marine sediments [F. A. Boyle and N. P. Chotiros, J. Acoust. Soc. Am. 93, 2397(A) (1993)]. The method begins with computation of the pressure induced at an element of scattering volume in the sediment. The pressure returned to a projector is then obtained via a reciprocal relationship between source and scatterer. A similar technique is developed to permit the calculation of bistatic scattering strengths. This technique is combined with a Biot model for acoustic penetration and a scattering model involving trapped bubble resonance scattering, to arrive at a bistatic sandy sediment acoustic scattering model. [Work supported by Naval Res. Lab. Stennis Space Center under the MCM Tactical Environmental Data System (MTEDS) project.]