A two-component Arctic ambient noise model

Authors

  • M.V. Greening Jasco Res. Ltd., Sidney, BC, Canada
  • P. Zakarauskas

Keywords:

acoustic wave production, oceanographic regions, sea ice, underwater sound, two-component Arctic ambient noise model, Arctic ambient noise spectra, active pressure ridging, ice cracking, propagation loss, spring-time ambient noise, 2 to 200 Hz

Abstract

Short term Arctic ambient noise spectra over the frequency band 2-200 Hz are presented along with a two component noise model capable of reproducing these spectra. The model is based on the measured source spectrum and the spatial, temporal and source level distributions of both active pressure ridging and ice cracking. Modelled ambient noise levels are determined by summing the input energy of the distributions of ice cracking and pressure ridging events and removing the propagation loss. Both modelled and measured spectra show that ice cracking may dominate the spring-time ambient noise to frequencies as low 40 Hz with active pressure ridging dominating below this. Modelled results also show that over 80% of the total noise energy above 40 Hz produced by ice cracking is generated within 30 km of the receiving hydrophone while over 50% is generated within 6 km

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Published

1992-09-01

How to Cite

1.
Greening M, Zakarauskas P. A two-component Arctic ambient noise model. Canadian Acoustics [Internet]. 1992 Sep. 1 [cited 2022 Jan. 20];20(3):69-70. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/740

Issue

Section

Proceedings of the Acoustics Week in Canada