Accession Number : AD0283304

Title :   COHERENCE OF ACOUSTIC SIGNALS IN THE OCEAN

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : LUND,G.R. ; SINGLETARY,J.F. ; KELLY,C.E.

Report Date : APR 1962

Pagination or Media Count : 57

Abstract : Hydrophone installation and experimental procedures are described for determining the coherence of pseudo-random signals transmitted through the ocean in the Bermuda area. Curves of the correlation anomaly between the expected percent correlation and the measured correlation are shown for various hydrophone spacings and ranges. It is concluded that there is no measurable change in coherence due to dstortion of the signal by the medium in the present data. (Author)

Descriptors :   *ACOUSTICS, *SOUND RANGING, DISTORTION, HYDROPHONES, OCEANS, SOUND TRANSMISSION, TEST METHODS, UNDERWATER SOUND

Distribution Statement : APPROVED FOR PUBLIC RELEASE