Analysis of Whitecap Data from TREX13
Abstract
The long-term goal is to develop remote monitoring techniques of wave breaking that will allow prediction of the acoustical effects of bubbles beneath the sea surface as a function of acoustic frequency and wind speed. Recent work has shown that, for a given wind speed driving wave breaking, there exists a critical bubble radius that controls the frequency-dependent scattering and absorption of sound incident on the sea surface[1]. Sound at frequencies equal to or greater than the natural frequency of the bubble with a critical radius tends to be absorbed within a somewhat persistent bubble layer at the surface whereas lower frequency sound is more simply refracted by the layer. The remote monitoring of wave breaking as a function of wind speed coupled with observations of reverberation in different frequency regimes will enable models of reverberation that incorporate bubble effects to be tested, furthering the ultimate objective of predicting optimal frequency bands for acoustic instrument performance under wind-driven seas.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2014
- Accession Number
- ADA617707
Entities
People
- Grant B Deane
Organizations
- Scripps Institution of Oceanography