Microphones are used in many applications such as telephones , tape recorders , hearing aids , motion picture production , live and recorded audio engineering , in radio and television broadcasting and in computers for recording voice , VoIP , and for non-acoustic purposes such as ultrasonic checking .

Microphones are used in many applications such as telephones , tape recorders , hearing aids , motion picture production , live and recorded audio engineering , in radio and television broadcasting and in computers for recording voice .
