Apparatus and method for sound pressure analysis of high sound pressure field, ultrasonic cleaner, ultrasonic processor

摘要

A sound pressure analysis apparatus for a high sound pressure field capable of accurately estimating a cavitation threshold and a cavitation generation amount, wherein the sound pressure analysis apparatus (42) for a high sound pressure field according to the present invention uses the sound pressure of the sound field. A hydrophone (31) that outputs a signal of a voltage that responds, a frequency analysis device (42), and an arithmetic unit (23) are provided. The frequency analysis device (42) generates sound based on the voltage signal from the hydrophone (31). The frequency components of the field are analyzed and classified into fundamental frequency components, harmonic components, subharmonic components and white noise components, and the arithmetic unit (23) calculates the average sound pressure (ABP) of the white noise components in the frequency range having practical sensitivity. ) Is calculated, and it is estimated that there is a threshold at which cavitation occurs at a point where ABP turns to an increase from a value of almost zero, and from the size of ABP To estimate the Yabiteshon emissions.