| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sound production unit securing a high sound pressure with a small space. <P>SOLUTION: In the sound production unit 100, a resonance space 106 is constituted with a sound production means 104, a substrate 102 and a unit case 101, thereby, can be miniaturized, and the resonance space 106 allows to set resonance frequency of the resonance space 106 close to the resonance frequency of the sound production means 104 and, thereby, a high sound pressure can be secured. <P>COPYRIGHT: (C)2010,JPO&INPIT |
