ELECTRO-ACOUSTIC TRANSDUCER, ELECTRONIC DEVICE, WATERPROOF COVER, AND METHOD FOR TESTING VENTILATION OF ELECTRO-ACOUSTIC TRANSDUCER

摘要

PROBLEM TO BE SOLVED: To provide an electro-acoustic transducer which performs a ventilation test in which gas passes through a waterproof film while the waterproof film is attached to the electro-acoustic transducer.;SOLUTION: The electro-acoustic transducer has a casing having a sound hole and a diaphragm prepared in the casing. The electro-acoustic transducer constitutes a closed space by covering the sound hole with the waterproof film, and the closed space is opened to the outside through a ventilation test hole.;COPYRIGHT: (C)2009,JPO&INPIT