Microphone
The microphone listens to all nearby players microphones within a configurable range (or sounds played in the world if the Sound Listening feature is enabled). It then sends any audio it hears to connected Copper Wires.
Redstone Interaction
The microphone, when used in conjunction with a Redstone Comparator, can output a redstone signal equivalent to the measured loudness of the audio that it hears. If the sound does not belong to a voice, and is instead a sound being heard through Sound Listening, the signal is equivalent to the distance to the microphone.