Spectral probability density as a tool for marine ambient noise analysis

N.D. Merchant, T.R. Barton, P.M. Thompson, E. Pirotta, D.T. Dakin, J. Dorocicz

Research output: Contribution to conferencePaper

Abstract

The empirical probability density of the power spectral density has been successfully applied as tool to assess signal variability and sensor system performance in the seismic literature. This paper presents the application of this analysis method to underwater ambient noise measurements, and demonstrates its utility in assessing the field performance of passive acoustic monitoring systems and the statistical distribution of noise levels across the frequency spectrum. Using example datasets from an autonomous passive acoustic recorder in the Moray Firth, Scotland, UK, and a cabled subsea observatory in the Strait of Georgia, British Columbia, we show how this method can reveal data limitations such as persistent tonal components and insufficient dynamic range, and phenomena such as bimodality and outliers which may be undetected by standard analysis techniques. We then combine this approach with conventional percentiles and spectral averages, illustrating how the underlying noise level distributions influence these metrics, and propose this technique as a standard, integrative presentation of ambient noise spectra.
Original languageEnglish
DOIs
Publication statusPublished - 2013
Event21st International Congress on Acoustics, ICA 2013 - Montreal, QC, Canada
Duration: 2 Jun 20137 Jun 2013

Conference

Conference21st International Congress on Acoustics, ICA 2013
CountryCanada
CityMontreal, QC
Period2/06/137/06/13

Fingerprint

Acoustics
Power spectral density
Observatories
Acoustic noise
Monitoring
Sensors

Cite this

Merchant, N. D., Barton, T. R., Thompson, P. M., Pirotta, E., Dakin, D. T., & Dorocicz, J. (2013). Spectral probability density as a tool for marine ambient noise analysis. Paper presented at 21st International Congress on Acoustics, ICA 2013, Montreal, QC, Canada. https://doi.org/10.1121/1.4799210

Spectral probability density as a tool for marine ambient noise analysis. / Merchant, N.D.; Barton, T.R.; Thompson, P.M.; Pirotta, E.; Dakin, D.T.; Dorocicz, J.

2013. Paper presented at 21st International Congress on Acoustics, ICA 2013, Montreal, QC, Canada.

Research output: Contribution to conferencePaper

Merchant, ND, Barton, TR, Thompson, PM, Pirotta, E, Dakin, DT & Dorocicz, J 2013, 'Spectral probability density as a tool for marine ambient noise analysis' Paper presented at 21st International Congress on Acoustics, ICA 2013, Montreal, QC, Canada, 2/06/13 - 7/06/13, . https://doi.org/10.1121/1.4799210
Merchant ND, Barton TR, Thompson PM, Pirotta E, Dakin DT, Dorocicz J. Spectral probability density as a tool for marine ambient noise analysis. 2013. Paper presented at 21st International Congress on Acoustics, ICA 2013, Montreal, QC, Canada. https://doi.org/10.1121/1.4799210
Merchant, N.D. ; Barton, T.R. ; Thompson, P.M. ; Pirotta, E. ; Dakin, D.T. ; Dorocicz, J. / Spectral probability density as a tool for marine ambient noise analysis. Paper presented at 21st International Congress on Acoustics, ICA 2013, Montreal, QC, Canada.
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