Resonator measurements in synthetic media show that sound absorption in seawater is caused by chemical relaxations involving B(OH)3 and MgCO3 in addition to MgSO4. The MgCO3 relaxation can be modeled as a two‐step MgCO03 ion‐pair association in which a monomolecular step controls the absorption process. The B(OH)3 relaxation involves a similar two‐step association of the B(OH)−4 ion in which interactions with the pH buffer system play a crucial role. A number of other relaxations are observed, but their contributions are negligible under seawater conditions.
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© 1980 Acoustical Society of America.
1980
Acoustical Society of America
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