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1. (WO2013122048) ULTRASONIC GENERATION APPARATUS

Pub. No.:    WO/2013/122048    International Application No.:    PCT/JP2013/053261
Publication Date: Fri Aug 23 01:59:59 CEST 2013 International Filing Date: Wed Feb 13 00:59:59 CET 2013
IPC: H04R 17/00
H04R 1/28
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: YAMAMOTO, Hironari
山本 浩誠
Title: ULTRASONIC GENERATION APPARATUS
Abstract:
Provided is an ultrasonic generation apparatus capable of acquiring high sound pressure over a wide frequency band and of acquiring even higher sound pressure. In the ultrasonic generation apparatus (1), an ultrasonic generator (2) having first sound-wave emitting holes (12a and 12c) and emitting ultrasonic waves from the first sound-wave emitting holes (12a and 12c) when a first acoustic resonance occurs internally is secured to an inner surface of a case (3), and the case (3) is configured so as to form a cavity that produces a second acoustic resonance different from the first acoustic resonance, said cavity being formed between the first sound-wave emitting holes (12a and 12c) and a second sound-wave emitting hole (7a) that is provided in the case (3) and emits ultrasonic waves to the outside.