Simultaneous measurements of acoustic emission and sonochemical luminescence for monitoring ultrasonic cavitation

• DOI: 10.1121/10.0005136
• Publication Date: 2021-06-24T18:34:01Z
• Authors: Ohbin Kwon; Ki Joo Pahk; Min Joo Choi
• Keywords: Sonoluminescence; Hydrophone; Sonication; Acoustic Emission; Sonochemistry

In the present study, a novel hybrid method was considered to identify and measure inertial cavitation activity using acoustic optical emissions from violent bubble collapses. A photomultiplier (PMT) tube calibrated cylindrical needle hydrophone were used simultaneously detect sonochemical luminescence (SCL) signals emissions, respectively, during sonication. focusing ultrasound transducer operating at 398.4 kHz employed produce dense cloud focus. The results clearly showed that similar trend between PMT output (i.e., SCL results) broad band started appear frequencies above fourth harmonic of sonication frequency. experimental observation suggests occurrence can be monitored high pass spectral power cut-off frequency effectively chosen with aid measurement. is expected useful for dosimetry in various medical industrial applications.