title: The acoustic signature of bubbles fragmenting in sheared flow.
abstract: Measurements of the sound of bubbles fragmenting in fluid shear are presented and analyzed. The frequency, amplitude, and decay rate of the acoustic emissions from 1.8-mm-radius bubbles fragmenting between opposed fluid jets have been determined. A broad band of frequencies (1.8 to 30 kHz) is observed with peak pressure amplitudes in the range of 0.03 to 2 Pa. While the peak pressure amplitudes show no significant scaling with frequency, the frequency dependence of the decay rates is consistent with the sum of thermal and acoustic radiation losses.
authors.forename: Grant B
authors.initials: GB
authors.lastname: Deane
authors.forename: M Dale
authors.initials: MD
authors.lastname: Stokes