Ultrasonic oscillator - has oversize matching body resting on support ring for acoustic dampening

摘要

The ultrasonic oscillator with a piezoelectric oscillating body and a lambda/4 matching body on the end surface of an oscillating body, has a matching body (16) with an outer dia. greater than the outer dia. of the weighting ring (14). The projecting ring surface of the matching body is supported by an acoustic dampening ring (18/20). USE/ADVANTAGE - Prodn. of sonic beam with narrow opening angle. Structure gives improved damping of side oscillation with high transmission power and narrow acoustic lobe.