Accession Number:

AD0786011

Title:

An Experimental Study of the Reflection of Underwater Sound from the Sea Surface.

Descriptive Note:

Technical memo.,

Corporate Author:

SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1974-08-15

Pagination or Media Count:

59.0

Abstract:

An experimental study of forward scattering of sound from a rough sea surface has been made using an explosive charge as a broadband sound source and a linear array of omnidirectional hydrophones as a receiver. Using the surface-grazing angle of the incident sound and the sea-surface roughness as parameters the signal coherence has been examined for a single hydrophone temporal coherence and for the signals from two hydrophones of the array spatial coherence. A simple theory has been used to guide the analysis. The surface scattering is assumed to consist of a coherent part and an additional incoherent part such that the total average received power is conserved. This time-frequency theory describes the surface-scattering process sufficiently well to agree with the experimental results. Author

Subject Categories:

  • Physical and Dynamic Oceanography
  • Seismic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE