Sound Amplifier Microphone

Location
In area of overhead control panel

Purpose
Measure noise level in vehicle passenger compartment.

Design
Capacitor microphone; therefore requires power supply from the sound amplifier (A2/13).

Function
The sound amplifier microphone (B25/6) continuously receives the sound waves generated by all noises via a diaphragm and converts them into an analog, electrical signal. This signal is evaluated by the sound amplifier (A2/13).