ACOUSTIC IMPEDANCE SENSOR DESIGNED TO MEASURE THE INPUT ACOUSTIC IMPEDANCE OF A WAVEGUIDE

摘要

The present invention concerns an acoustic impedance sensor designed to measure the input acoustic impedance of a waveguide. This sensor is characterized in that the source is a piezoelectric pellet that makes it possible for the determination of the acoustic impedance of a passive acoustic element to remain coherent for low frequencies while preserving an inexpensive implementation of the sensor.