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Quantifying the acoustic output of diagnostic and therapeutic medical ultrasound devices is an established practice, using measurement methods based on applying miniature hydrophones to determine acoustic pressure distributions. However, specification standards require manufacturers to describe and declare acoustic output information in the form of intensity values, as these are more relevant to the...
As part of an ongoing project to establish a reference facility for acoustic cavitation at the National Physical Laboratory (NPL), carefully controlled studies on a 25 kHz, 1.8 kW cylindrical vessel are described. Using a patented high-frequency acoustic emission detection method and a sonar hydrophone, results are presented of the spatial variation of inertial acoustic cavitation with increasing...
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