Acoustic Exploration of Ocean Floor Properties Based on the Ringing of Sediment Layer Resonances

摘要

It has recently been shown that the physical properties of a layered ocean floor may in principle be determined from an analysis of the resonances in frequency, or in the angle of incidence, which appear in bottom-reflected acoustic signals. In the present paper we demonstrate how, using sinuosoidal signals of long but finite duration, individual resonances can be selectively excited and analyzed. Multiple-bounce layer resonances interfere destructive with the specular echo, and manifest themselves through a characteristic ringing. (Author)