| 摘要 |
PROBLEM TO BE SOLVED: To easily verify operation, when setting microphones at meeting facilities and the like. SOLUTION: The phantom power feed type microphone comprises a voice output section 10 including a condenser microphone unit 11, a voice amplification circuit 14, a power supply 15 detachably connected to a phantom power supply, and a control section 20, including a manual microphone switch 21 for turning on or off the output of the voice amplification circuit 14 and a display lamp 22 that blinks due to switching on/off of the microphone switch. Additionally, the microphone comprises a lighting circuit (a second integrated circuit consisting of RB and CB) for lighting the display lamp 22, by obtaining power from a power supply circuit 15 when making connection to the phantom power supply of a power supply circuit 15, and for making a turn-off circuit (a second integrated circuit consisting of RA and CA) to turn off the display lamp 22 at a specific time interval, after the display lamp is turned on, and at the same time, for making turning off the output of the voice amplification circuit 14.
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