| 摘要 |
The present invention relates to an emergency call device inside an elevator car. The emergency call device inside an elevator car of the present invention relates to an emergency call device inside an elevator which is installed at the rear of a sign panel of an operating control panel and which includes a speaker, a microphone, and PCB. The invention relates to an emergency call device inside an elevator which is installed at the rear of a sign panel of an operating control panel and which includes a speaker, a microphone and PCB. The invention comprises: a plurality of holes; a microphone sounding chamber capable of adjusting a sound volume inputted to the microphone by selectively adjusting the reflection and a sound absorption amount of a sound input inputted from a microphone hole in the sign panel according to selective opening/closing of some holes among the plurality of holes; a microphone absorption layer for absorbing a sound which is filled in a rear part of the microphone sounding chamber and which has passed through the holes of the sounding chamber; and an absorption layer filled with a porous sound-absorbing material for preventing a rear reflection of a speaker sound at the rear of the speaker. |
