| 摘要 |
PROBLEM TO BE SOLVED: To improve sound quality by stably fixing an acoustic component without requiring the space such as an exhaustion chamber for sound quality improvement or without increasing costs even when mounting the acoustic component in a portion that is not flat, such as a step portion or an irregular portion. SOLUTION: A back side of a speaker 6 is mounted in a portion which is not flat, and a spacer 7 in such a size as to cover the speaker 6 is stuck on an apparatus substrate 5. The portion corresponding to the back side of the speaker 6 is flattened by the spacer 7. Flattening vibrates a vibrating portion of the speaker 6 and when ringing sound, stable vibration can be obtained, and particularly at low frequencies with a great amplitude, distortion reduction can be achieved and sound quality improvement can be attained. COPYRIGHT: (C)2008,JPO&INPIT
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