RT Journal Article SR Electronic T1 Attenuation of Low-Frequency Sound in Freshwater JF Science JO Science FD American Association for the Advancement of Science SP 1120 OP 1121 DO 10.1126/science.162.3858.1120 VO 162 IS 3858 A1 Browning, David G. A1 Jones, Everett N. A1 Mellen, Robert H. A1 Thorp, William H. YR 1968 UL http://science.sciencemag.org/content/162/3858/1120.abstract AB 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.