Long-Range, Deep-Ocean Propagation of 15-Hz CW Acoustic Signals.
NAVAL RESEARCH LAB WASHINGTON DC
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The acoustic field of a shallow continuous-wave source operating near 15-Hz was measured at a deep sound-channel hydrophone located near Midway Island. The source was towed repeatedly between 700-km range and 1700-km range along a great circle track whose extension passed through the receiver. Although the possibility of long-range transmission of low-frequency acoustic energy via bottom-bounce and bottom-penetrating paths has been postulated, analysis of the 15-Hz transmission loss curves indicated that the only long-range propagation paths of significance were those which did not interact with the bottom.
- Acoustic Detection and Detectors