Acoustic Attenuation in the Deep Ocean Below 2000 Hz,
TRACOR INC WASHINGTON D C
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This report presents a brief summary of existing acoustic attenuation mechanisms and attenuation data. An emperical relation between the attenuation and frequency is developed which fits the available data below 2000 Hz to within 16. This expression is given by alpha 0.0265 f to the 34 power where f is in KHz and alpha is in dBKyd. This expression was developed from the data of Thorp, Kibblewhite, et-al., and Urick. No attempt was made to correlate the attenuation coefficient at low frequencies with temperature, depth or salinity since the quantity of available data is not sufficient and the scatter of the data is too large.
- Physical and Dynamic Oceanography