Wind-dependence of low-frequency ambient noise in the deep-ocean sound channel

Stephen Nichols, David Bradley

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

In the low-frequency range (1-125 Hz), the deep-ocean ambient noise field is produced by seismic, marine life, ship traffic, and wind-dependent hydrodynamic noise mechanisms. This study focuses on the contribution of wind-related source mechanisms to the overall ambient noise field, as well as previous attempts to understand the physics of these mechanisms. The Comprehensive Nuclear-Test Ban Treaty Organization (CTBTO) hydroacoustic monitoring system has produced nearly continuous recordings of the low-frequency deep-ocean ambient noise field at sites in the Pacific, Atlantic, and Indian Oceans, each spanning several years in length. Additionally, wind speed data have been recorded at the host island of each station by the National Oceanic and Atmospheric Administration (NOAA). Correlation techniques are used with these two datasets to determine the relationship between wind speed and the sound level in different frequency bands, and to determine the prominence of wind-related noise in the combined ambient noise spectrum. Results from the three sites are compared to each other to assess the uniformity of wind-generated noise over the world's ocean basins.

Original languageEnglish (US)
Article number070037
JournalProceedings of Meetings on Acoustics
Volume19
DOIs
StatePublished - Jun 19 2013

Fingerprint

oceans
low frequencies
acoustics
Atlantic Ocean
underwater acoustics
Indian Ocean
Pacific Ocean
noise spectra
ships
traffic
stations
frequency ranges
recording
hydrodynamics
physics

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

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abstract = "In the low-frequency range (1-125 Hz), the deep-ocean ambient noise field is produced by seismic, marine life, ship traffic, and wind-dependent hydrodynamic noise mechanisms. This study focuses on the contribution of wind-related source mechanisms to the overall ambient noise field, as well as previous attempts to understand the physics of these mechanisms. The Comprehensive Nuclear-Test Ban Treaty Organization (CTBTO) hydroacoustic monitoring system has produced nearly continuous recordings of the low-frequency deep-ocean ambient noise field at sites in the Pacific, Atlantic, and Indian Oceans, each spanning several years in length. Additionally, wind speed data have been recorded at the host island of each station by the National Oceanic and Atmospheric Administration (NOAA). Correlation techniques are used with these two datasets to determine the relationship between wind speed and the sound level in different frequency bands, and to determine the prominence of wind-related noise in the combined ambient noise spectrum. Results from the three sites are compared to each other to assess the uniformity of wind-generated noise over the world's ocean basins.",
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Wind-dependence of low-frequency ambient noise in the deep-ocean sound channel. / Nichols, Stephen; Bradley, David.

In: Proceedings of Meetings on Acoustics, Vol. 19, 070037, 19.06.2013.

Research output: Contribution to journalConference article

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