Accession Number : AD0717588

Title :   The Effects of Ocean Surface Roughness on the Transmission of Sound From an Airborne Source.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Helbig,Raymond Allan

Report Date : DEC 1970

Pagination or Media Count : 121

Abstract : Using the research platform 'FLIP', experiments were conducted to determine the effect of measured ocean surface roughness on transmission of sound from an airborne source into the sea. Signal noise both at the air-water interface and at points in the underwater sound field were recorded using modified AN/SSQ-57 sonobuoys. Ocean wave spectra and rms wave height, sigma, were determined from simultaneous recordings of ocean surface wave height variations. (Author)

Descriptors :   (*OCEANS, SURFACE ROUGHNESS), (*UNDERWATER SOUND, SOUND TRANSMISSION), AIRBORNE, SONAR EQUIPMENT, BUOYS, ALTITUDE, ANALOG SYSTEMS, INTERFACES, STABILIZED PLATFORMS, CALIFORNIA, THESES

Subject Categories : Physical and Dynamic Oceanography
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE