Accession Number : AD0723861

Title :   Initial Distortion of an Acoustic Pulse on Reflection from a Rough Surface.

Descriptive Note : Technical memo.,

Corporate Author : SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s) : Clarke,Richard H.

Report Date : 15 JAN 1971

Pagination or Media Count : 23

Abstract : It is demonstrated that the initial part of the acoustic signal received by way of reflection at the rough sea surface from an explosive source is distorted in a calculable way. As the effective roughness of the sea surface increases, the rise time of the initial part of the received pulse increases and its peak value decreases. Recommendations are made on how this latter effect of 'coherent peak loss' could be predicted from oceanographic data and compared with acoustic measurements. (Author)

Descriptors :   (*UNDERWATER SOUND, SOUND TRANSMISSION), (*SONAR SIGNALS, REFLECTION), SURFACE ROUGHNESS, OCEAN WAVES, UNDERWATER EXPLOSIONS, MATHEMATICAL ANALYSIS, ITALY

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE