Patent ID: 8121301
Filing Date: 2012-02-21
Classification: H04M,H04R

Abstract:
1. An earpiece comprising: an electromechanical acoustic transducer that has a diaphragm, and is configured to generate a sound by vibrating the diaphragm in response to an electric signal; a case configured to contain the electromechanical acoustic transducer; a sound hole provided at a position of the case so as to face the electromechanical acoustic transducer; and a holding member configured to hold the electromechanical acoustic transducer in the case, and surround a periphery of the sound hole, wherein prior to incorporating the electromechanical acoustic transducer into the earpiece, a sound pressure-frequency characteristic of the electromechanical acoustic transducer has been compensated based on a difference between the sound pressure-frequency characteristic derived when the sound is leaked from a gap between an ear and the case and the sound pressure-frequency characteristic derived when no sound is leaked.