Sounds in the Ocean at 1–100 Hz

Author:

Wilcock William S.D.1,Stafford Kathleen M.2,Andrew Rex K.2,Odom Robert I.2

Affiliation:

1. School of Oceanography, University of Washington, Seattle, Washington 98195;

2. Applied Physics Laboratory, University of Washington, Seattle, Washington 98105;, ,

Abstract

Very-low-frequency sounds between 1 and 100 Hz propagate large distances in the ocean sound channel. Weather conditions, earthquakes, marine mammals, and anthropogenic activities influence sound levels in this band. Weather-related sounds result from interactions between waves, bubbles entrained by breaking waves, and the deformation of sea ice. Earthquakes generate sound in geologically active regions, and earthquake T waves propagate throughout the oceans. Blue and fin whales generate long bouts of sounds near 20 Hz that can dominate regional ambient noise levels seasonally. Anthropogenic sound sources include ship propellers, energy extraction, and seismic air guns and have been growing steadily. The increasing availability of long-term records of ocean sound will provide new opportunities for a deeper understanding of natural and anthropogenic sound sources and potential interactions between them.

Publisher

Annual Reviews

Subject

Oceanography

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