| 摘要 |
PURPOSE:To provide an acoustic gyro which can prevent a change in a sound pressure due to a change in the impedance of a sound source. CONSTITUTION:A loudspeaker 20 which drives the air filled inside a case 10 and one pair of microphones 31, 32 which detect a sound pressure inside a detection channel 15 are installed in the case 10 which has two rooms 13, 14 which are connected by the detection channel 15. The loudspeaker 20 is driven by a constant-current drive-type oscillator 45. |
