title: Analysis of high-frequency wind-driven ambient noise in shallow brackish water.
abstract: Ambient noise spectra in a shallow brackish water environment were found to be steeper than expected at frequencies above 10 kHz. The high-frequency behavior of the spectra was resolved by modeling dispersion and noise in bubbly water. Bubble size distributions fitted to the brackish water spectra exhibit a distinctive maximum in the radius range 0.1-0.3 mm, and a substantial drop in bubble density below a radius of 0.1 mm. The brackish water distributions were tied to an oceanic spectrum with a spectral slope of 5.7 dB/octave obtained with a -3 / 2 power law dependence of bubble size density on radius.
authors.affiliation: Finnish Naval Research Institute, PO Box 116, FIN-02631 Espoo, Finland. ari.poikonen@mil.fi
authors.forename: Ari
authors.initials: A
authors.lastname: Poikonen
mesh_terms: D000162:Acoustics; D004777:Environment; D008962:Models, Theoretical; D009622:Noise; D009792:Oceans and Seas; D012623:Seawater; D014919:Wind