发明名称 CONDENSER MICROPHONE
摘要 PROBLEM TO BE SOLVED: To provide a condenser microphone where variation in cut-off frequencies is reduced at a low frequency region and a low cut-off frequency can be obtained by improving fluctuation in an acoustic resistance due to variation in the internal shape of a back pressure chamber and a communication hole. SOLUTION: A membrane 6 is used to close one opening of a housing member 1 that is a cylinder whose both ends are open, the inside of the cylinder of the housing member 1 are closed by insulation members 14, 15 forming an acoustic circuit to form a back pressure chamber 10. The acoustic circuit forms an external vent to the back pressure chamber 10.
申请公布号 JP2001112093(A) 申请公布日期 2001.04.20
申请号 JP19990292082 申请日期 1999.10.14
申请人 RION CO LTD 发明人 CHIFU MASAYUKI
分类号 H04R19/04;H04R1/22;(IPC1-7):H04R19/04 主分类号 H04R19/04
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