Attenuation of Low-Frequency Sound in Freshwater

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Science  06 Dec 1968:
Vol. 162, Issue 3858, pp. 1120-1121
DOI: 10.1126/science.162.3858.1120


Lake Superior was chosen as an experimental site to compare sound absorption of freshwater with the results of absorption measurements in seawater. The relaxation-like absorption at 1 kilohertz occurring in seawater is also present in freshwater. A relaxation related to the structural characteristics rather than to the salt content of water may be responsible for the anomalous absorption.

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