Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion

Lindstrom, Timothy E.

doi:10.1575/1912/5460

Cited by 1 publication

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References 18 publications

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“…͑9͔͒, made using this type of directional spectrum estimate can be shown to be in error by factors as large as 10 3 . 27 Other weighted averages of the first five Fourier coefficients can be made, but they also produce an unrealistically smooth estimate. Several investigators have fit empirical curves to measured directional spectra.…”

Section: Appendix: Determination Of the Surface-wave Directional Specmentioning

confidence: 99%

Measurement and prediction of ultralow frequency ocean ambient noise off the eastern U.S. coast

Wilson

Frisk

Lindstrom

et al. 2003

The Journal of the Acoustical Society of America

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Ultralow frequency (0.02-2 Hz) acoustic ambient noise was monitored from January to April 1991 at six ocean bottom stations off the eastern U.S. coast. The depths of the stations ranged from about 100 m to 2500 m. The measured spectra are in good agreement with predictions made using Cato's theory [J. Acoust. Soc. Am. 89, 1076-1095 (1991)] for noise generation by surface-wave orbital motion after extending the calculations to incorporate horizontally stratified environments. Contributions from both the linear, single-frequency (virtual monopole) and the nonlinear, double-frequency (dipole) mechanisms are clearly recognizable in the data. The predictions make use of directional wave data obtained from surface buoys deployed during the SWADE experiment and an ocean bottom model derived from compressional wave speed data measured during the EDGE deep seismic reflection survey. The results demonstrate conclusively that nonlinear surface-wave interactions are the dominant mechanism for generating deep-ocean ULF noise in the band 0.2-0.7 Hz.

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Section: Appendix: Determination Of the Surface-wave Directional Specmentioning

confidence: 99%

Measurement and prediction of ultralow frequency ocean ambient noise off the eastern U.S. coast

Wilson

Frisk

Lindstrom

et al. 2003

The Journal of the Acoustical Society of America

Self Cite

View full text Add to dashboard Cite

show abstract

Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion

Abstract: A model is developed for the prediction of the seismo-acoustic noise spectrum in the microseism peak region (0.1

Cited by 1 publication

References 18 publications

Measurement and prediction of ultralow frequency ocean ambient noise off the eastern U.S. coast

Measurement and prediction of ultralow frequency ocean ambient noise off the eastern U.S. coast

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