Abstract
When sound is transmitted in the sea the amplitude of the received signal is found to fluctuate. Various causes of signal fluctuations are discussed and the possibility of turbulence in the water causing some acoustic signal fluctuation is put forward. The statistical properties of turbulence are discussed and a theoretical prediction for the amount of signal fluctuation likely to be expected for a given degree of turbulence is made. Practical measurements, both of signal amplitude fluctuations and of the energy distribution of turbulent eddies agree very closely with the theoretical predictions.
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