Shallow Water Bottom Reverberation under Downward Refraction Conditions

Abstract

In 1965, some propagation loss and reverberation level measurements were performed under downward refraction conditions in a location south of Long Island. The interpretation of the propagation loss results was described in a previous paper [J. Acoust.Soc. Am. 41 (1967)]. This paper presents the reverberation level measurements collected during those trials, and reduces these measurements to scattering strength values by considering the details of the propagation to and from the bottom. The results are shown to be similar to those which Urick [J. Acoust. Soc. Am. 48, 129(A) (1970)] derived by ignoring the details of the propagation paths to and from the scatterets. Finally, the manner in which the downward refraction conditions facilitate the general gathering of bottom scattering strength values for shallow water areas is discussed.