Ultrasonic transmitter/receiver, process for producing the same, and ultrasonic flowmeter

摘要

An ultrasonic transducer according to the present invention includes a piezoelectric body 2 for transmitting and receiving an ultrasonic wave and acoustic matching layers 3 a and 3 b made of a dry gel. The acoustic matching layers 3 a and 3 b are multiple dry gel layers with mutually different acoustic impedances.