Low Frequency Sound Attenuation Anomaly in the Ocean: Recent Experimental Measurements.

Numerous explanations have been put forth for the low frequency sound attenuation anomaly in the oceans. Since laboratory measurements are difficult to perform in the frequency range, a series of experiments were conducted in natural bodies of water to determine the effect of salinity, temperature,...

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Bibliographic Details
Main Authors: Browning,D. G., Jones,E. N., Mellen,R. H., Thorp,W. H.
Other Authors: NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I
Format: Text
Language:English
Published: 1971
Subjects:
Physical and Dynamic Oceanography
Acoustics
*Sea water
*Underwater sound
*Acoustic attenuation
Correlation techniques
Salinity
Temperature
Pressure
Marine biology
Low frequency
Most Project-2
Hudson
Hudson Bay
Pacific
Online Access:http://www.dtic.mil/docs/citations/AD0780845
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0780845
Description
Summary:Numerous explanations have been put forth for the low frequency sound attenuation anomaly in the oceans. Since laboratory measurements are difficult to perform in the frequency range, a series of experiments were conducted in natural bodies of water to determine the effect of salinity, temperature, pressure and biological activity. The areas in which experiments have been conducted to date are: Lake Superior, Lake Tanganyika, Red Sea and Hudson Bay. The results of these experiments are compared with other recent measurements in the Pacific Ocean and Mediterranean Sea. Although significant variations are noted among the sites, no one mechanism appears to be clearly responsible. (Author)

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