Interference of Wide-Band Sound in Shallow Water,
Abstract
Propagation experiments are described covering ranges of several km and frequencies between 0.1 and 1.2 kHz. The interference pattern for a source towed past a hydrophone demonstrates a focussing effect predicted theoretically. The interference pattern for a fixed source shows tidal changes of a magnitude agreeing with theory. From the results of both experiments the number of modes effective is found to vary as (frequency) x (range) to the minus 1/2 power, which has important implications. The mean frequency spacing of the interference peaks and the time dispersion of pulses are reciprocally related, and for isovelocity water both are almost independent of range and frequency. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1971
- Accession Number
- AD0733199
Entities
People
- D. E. Weston
- K. J. Stevens
Organizations
- Admiralty Research Laboratory