JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v. 124, No. 3, Page. EL91-EL96
The scintillation index and the intensity cumulative distribution function of mid-frequency (2-10 kHz) sound propagation are presented at ranges of 1-9 km in a shallow water channel. The fluctuations are due to water column sound speed variability. It is found that intensity is only correlated over a narrow frequency band (50-200 Hz) and the bandwidth is independent of center frequency and range. Furthermore, the intensity probability distribution peaks at zero for all frequencies, and follows an exponential distribution at small values. (C) 2008 Acoustical Society of America.