It's a small world: underwater sound transmission from the southern Indian Ocean to the western North Atlantic

Authors

  • I.A. Fraser Defence Res. Establ. Atlantic, Dartmouth, NS, Canada
  • P.D. Morash Defence Res. Establ. Atlantic, Dartmouth, NS, Canada

Keywords:

acoustic wave propagation, acoustic wave transmission, oceanographic regions, underwater sound, underwater sound transmission, western North Atlantic, acoustic signals, Heard Island, southern Indian Ocean, North America, 17000 km

Abstract

Sounds transmitted through the air are rarely detectable more than a few kilometers from their source. Beneath the sea, however, acoustic signals at frequencies less than a few hundred Hertz can often be detected at ranges of several thousand kilometers. The authors show that low-frequency acoustic signals entering the ocean near Heard Island in the southern Indian Ocean can be detected off the east coast of North America and that relatively crude modelling is sufficient to reproduce the signal levels observed, despite the long path length of approximately 17000 km (17 Mm)

Published

1992-09-01

How to Cite

1.
Fraser I, Morash P. It’s a small world: underwater sound transmission from the southern Indian Ocean to the western North Atlantic. Canadian Acoustics [Internet]. 1992Sep.1 [cited 2021Jun.22];20(3):67-8. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/739

Issue

Section

Proceedings of the Acoustics Week in Canada