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)

Additional Files

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]. 1992 Sep. 1 [cited 2025 Feb. 15];20(3):67-8. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/739

Issue

Vol. 20 No. 3 (1992)

Section

Proceedings of the Acoustics Week in Canada

License

Author Licensing Addendum

This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:

  1. Retained Rights: The Author(s) retain(s) the following rights:

    • The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
    • The right to use the Work in the Author's teaching activities and presentations.
    • The right to include the Work in a compilation for the Author's personal use, not for sale.

  2. Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.

  3. Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.

  4. No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.

  5. Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.

Most read articles by the same author(s)