Acoustic detection device with two microphones alternatively operated, e.g. for recording sound information in a motor vehicle, has voltage source supplying selected microphone with working voltage

摘要

The acoustic detection device has at least two microphones (11,12) that are alternatively operated and are connected to a voltage source (10) for supplying the microphones with working voltages. The output voltage of the voltage source can be selected depending on which microphone is being operated. The voltage source is controlled by a computer unit.