A model of the sound generated by breaking waves
نویسندگان
چکیده
The sound produced from a single bubble, oscillating atits breathing mode frequency, and the bubble size distribution are used to model the sound produced by breaking waves. The data of Medwin and Daniel [$. Acoust. Soc. Am. 88, 408-412 ( 1990} ] is used to evaluate the performance ofthe model. The model generates a damped sinusoidal pulse for every bubble formed, as calculated from the bubble size distribution. If the range from the receiver to the breaker is known then the only unknown parameters are e, the initial fractional amplitude of the bubble oscillation, and L, the dipole moment arm. It is found that if the product eXL is independent of the bubble radius the model reproduces the shape and magnitude of their measur6d sound spectrum accurately. The success of this simple model implies that the inverse problem (calculation of the bubble size distribution from the sound power spectrum} may be solved without he need to explicitly identify individual bubble pulses in the acoustic time series.
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