| 摘要 |
PROBLEM TO BE SOLVED: To adjust the acoustic resistance under a state where a diaphragm is fixed in a non-directional dynamic microphone. SOLUTION: On the sidewall of the unit housing 30 of a non-directional dynamic microphone, an opening 31 communicating with the space between a diaphragm 20 and an acoustic resistance material 60 is formed so that compressed air can be supplied from the opening 31 toward the acoustic resistance material. COPYRIGHT: (C)2008,JPO&INPIT
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