Accession Number : ADA138245

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

Descriptive Note : Interim technical rept. 1 Oct 82-30 Sep 83,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON DC DEPT OF PHYSICS

Personal Author(s) : Nagl,A ; Uberall,H ; Yoo,K B

PDF Url : ADA138245

Report Date : 30 Nov 1983

Pagination or Media Count : 25

Abstract : 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)

Descriptors :   *Acoustic reflection, *Ocean bottom, *Acoustic resonance, Acoustic signals, Inverse scattering, Layers, Sediments, Angle of incidence

Subject Categories : Physical and Dynamic Oceanography
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE