What earphones have a microphone in them?

Answer:
All Active Noise Cancelling Headphones, like Bose and others, have a monitoring microphone in them. Any insert earphone is actually a tiny microphone used in reverse. Nacre Quietpro combat hearing protectors have three microphones in each earpiece - one facing out and two facing into the ear canal. One of the two facing in generates sound appropriately modified to protect the wearer.
First answer by Sprocketman. Last edit by Sprocketman. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].