摘要 |
<P>PROBLEM TO BE SOLVED: To surely perform waterproofing and dustproofing, and to simultaneously prevent both sound distortion and sound leakage when using a rectangular electric acoustic transducer. Ž<P>SOLUTION: A first case 101 has a sound hole 110. A film member 103 is almost circular and is provided between the sound hole 110 and the electric acoustic transducer 107. A plate-like member 105 is provided between the film member 103 and the electric acoustic transducer 107, and has a second sound hole 111. The electric acoustic transducer 107 is almost rectangular and generates sound. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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