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Tidal modulation of very-low-frequency and ultra-low-frequency ambient noise levels
Anthony I Eller1, Kevin D Heaney1, David L Bradley2
1Applied Ocean Sciences, Springfield, Virginia 22151, USA.
Abstract:
Several years of continuous low-frequency underwater ambient noise data from 0.1 to 125 Hz have been made available for examination by the United Nations Comprehensive Nuclear Test Ban Treaty Organization. Narrow-band noise time records between 0.5 and 10 Hz were selected for study, chosen deliberately to address noise sources tied primarily to the environment. Power spectra of the variable narrow-band time records were found to display sharp spectral lines at fluctuation frequencies that match lunar and solar diurnal and semidiurnal ocean tides.
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