Patent ID: 8519600
Filing Date: 2013-08-27
Classification: A61B,B06B,G01N,G10K

Abstract:
1. An ultrasonic transducer comprising: a vibrating element which emits ultrasonic waves; and a backing material which is provided in contact with a back side of said vibrating element and which attenuates ultrasonic waves that are emitted toward the back side of said vibrating element and have an opposite phase to a phase of ultrasonic waves emitted toward a front side of said vibrating element, wherein acoustic tubes are disposed in said backing material such that a longitudinal direction of each of said acoustic tubes is in line with a traveling direction of the ultrasonic waves which are emitted by said vibrating element and travel toward the front side and the back side, said acoustic tubes having mutually different lengths on the basis of a principle of an acoustic wave synthesis, and said acoustic tubes attenuate in whole or in part the ultrasonic waves emitted by said vibrating element toward said backing material.