| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker device, for example a tweeter, of improved sound quality, by considering the fact that energy loss occurs when the sound wave oscillated from a vibrator collides with a baffle plate, to produce the waveform of dull rising and the sound of low sound quality in hearing since the auditory sense of human being almost decides sound quality at rising of sound waves. SOLUTION: A porous layer is formed on the surface of a baffle plate enclosing a vibrator. The porous layer is obtained by pasting particles of 0.5-1 mm in diameter, for example, such as quartz using a paint in a plurality of layers, and then removing the paint component to some extent using a solvent to form a hollow part. COPYRIGHT: (C)2006,JPO&NCIPI
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