The acoustic emission from collapsing cavitation bubbles generated using ultrasound of 20 kHz and 515 kHz frequencies in water has been measured and correlated with sonoluminescence and hydroxyl radical production to yield further information on the frequency dependence of sonochemical reactions. A reasonable correlation was found, and the results suggest differences in the predominant types of cavitation observed under laboratory conditions.
Price, G. J., Ashokkumar, M., Hodnett, M., Zequiri, B., & Grieser, F. (2005). Acoustic emission from cavitating solutions: Implications for the mechanisms of sonochemical reactions. Journal of Physical Chemistry B, 109(38), 17799-17801. https://doi.org/10.1021/jp0543227