Accession Number : AD0861117

Title :   Sound Attenuation between 200 Hz and 10 kHz.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Skretting, Audun ; Leroy, Claude

Report Date : 01 OCT 1969

Pagination or Media Count : 43

Abstract : Trials have been conducted in the Western Mediterranean to confirm the excess attenuation of sound at frequencies between 200 Hz and 10 kHz. As sound propagation along the deep refracted path in the isothermal deep water of the Mediterranean is only affected by geometrical spreading and attenuation, it is possible to measure the attenuation separately for each frequency. The trials used explosive sound sources at different depths and at accurately determined ranges between 200 m and 30 km. (Author)

Descriptors :   (*UNDERWATER SOUND, ATTENUATION), (*SOUND TRANSMISSION, ABSORPTION), (*ANTISUBMARINE WARFARE, DETECTION), UNDERWATER EXPLOSIONS, ENVIRONMENTAL TESTS, REFRACTION, TEMPERATURE, SEA WATER, CORRELATORS, MOORING BUOYS, HYDROPHONES, ELECTRIC FILTERS, MEDITERRANEAN SEA, ITALY, DEEP WATER, VERY LOW FREQUENCY, MINESWEEPERS.

Subject Categories : Undersea and Antisubmarine Warfare
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE