Accession Number : AD0682997

Title :   PROPAGATION OF SOUND PULSES IN A RANDOM MEDIUM WITH VARIABLE MEAN REFRACTION INDEX.

Descriptive Note : Technical rept.,

Corporate Author : WESTERN ELECTRIC CO INC NEW YORK

Personal Author(s) : Claus,A. J.

Report Date : 31 DEC 1967

Pagination or Media Count : 24

Abstract : Formulas giving statistics of arrival time of propagated sound pulses in a random medium are presented. The medium is assumed to have a Gaussian spatial covariance function and a mean refraction index depending only on depth. The results are approximately valid for source-receiver distances up to about 100 miles. Expected beam patterns of a three-dimensional array suspended in a sound channel are computed. The computations are based on the assumption that array gain is solely dependent on phase fluctuations, which are given by the phase function of geometrical optics. (Author)

Descriptors :   (*UNDERWATER SOUND, *SOUND TRANSMISSION), ACOUSTIC SIGNALS, PULSES, SONAR PULSES, SONAR ARRAYS, REFRACTIVE INDEX, GAIN, PHASE, STOCHASTIC PROCESSES

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE