Abstract
UNDERWATER sound waves are often thought of primarily as pressure waves. But a full description of any time-alternating hydrodynamic disturbance must also include a specification of the vector field of particle displacement, or its time-derivative, as well as the scalar pressure field. This, coupled with the fact that some marine animals are known to possess both pressure-sensitive and displacement-sensitive organs, leads to a theoretical consideration of any parameters of an acoustic field which could be used by an animal to obtain clues about its environment.
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References
Welsby, V. G., Department of Electronic and Electrical Engineering Memorandum No. 311, University of Birmingham.
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WELSBY, V. Pressure and Displacement Sensors used simultaneously in Underwater Sonar. Nature 218, 890–891 (1968). https://doi.org/10.1038/218890a0
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DOI: https://doi.org/10.1038/218890a0
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