Accession Number : ADD007873

Title :   Acoustical Deverberator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Medwin,Herman

Report Date : 30 Sep 1980

Pagination or Media Count : 7

Abstract : This report describes an acoustical deverberator for eliminating the reverberation from a sound signal originating with a transient sound source in shallow water. The sound signal is received by a single hydrophone and autocorrelated to determine the time differences between the direct signal and the bottom surface reflected signals. Together with the surface and bottom reflection coefficients and known depths of the hydrophone and water, the time differences are used to determine corrections which are applied to the received sound signal. The result is a clean sound signal free from interfering reverberation.

Descriptors :   *Patents, *Sonar sound analyzers, *Noise reduction, Reverberation, Shallow water, Bottom bounce, Autocorrelation

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE