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Collective bubble oscillations as a component of surf infrasound
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View: Figures


Image of FIG. 1.
FIG. 1.

Longuet-Higgins cubic vortex function compared to a semicylindrical cross section.

Image of FIG. 2.
FIG. 2.

Lowest eigenfrequency of collective bubble oscillation.

Image of FIG. 3.
FIG. 3.

Schematic of the acoustic transformation model: is the deepwater ocean wave frequency, the acoustic radiation frequency, the deepwater wave spectrum, the breaking wave height spectrum, the bubble cloud characteristic length distribution and the amplitude spectrum of acoustic radiation.

Image of FIG. 4.
FIG. 4.

Radiation frequencies of collective bubble oscillation from Eq. (6) versus the deepwater wave frequency for spectra with SWH of 1.7, 3.1, 4.5 and .

Image of FIG. 5.
FIG. 5.

Schematic of multiple contributions to bubble spectrum from ocean waves of different frequencies .

Image of FIG. 6.
FIG. 6.

Approximate evolution of plume cross-sectional area.

Image of FIG. 7.
FIG. 7.

Atmospheric infrasound from waves breaking at Polihale, Kauai.

Image of FIG. 8.
FIG. 8.

Modeled infrasound spectra for ocean wave spectra with SWH of 1.8, 2.1, 2.4, 2.8, 3.7, compared to Kauai data.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Collective bubble oscillations as a component of surf infrasound