| 摘要 |
PROBLEM TO BE SOLVED: To provide an intercom call monitor capable of grasping and managing the correspondence situation of operators who conduct work such as telephone reception and wireless communication commands.SOLUTION: An intercom call monitoring device is arranged between a device operated by an operator and a headset 2 having a microphone and a speaker. One or a plurality of light emitting elements 3 such as LEDs are arranged in a head portion of the head set 2. The intercom talk monitor device includes an operational amplifier 4 for shaping the audio signal, and an audio delay circuit 5 sets the display time of the light emitting elements 3. A plurality of band pass filters 6 and a plurality of AND gates 7 according to the frequency of the speech sound are arranged and the corresponding plural light emitting elements 3 are caused to emit light through the AND condition with the audio delay circuit 5 . By operating a manual notification switch 8 provided in the intercom call monitoring device, a light emitting element 12 such as the manual notification LED or the like can be forcefully illuminated and displayed.SELECTED DRAWING: Figure 2 |
