Tape Music

A microphone can be turned into a speaker and a speaker can be turned into a microphone. All you need to do to make the switch is switch things backwards. If an air microphone is wired to an audio output, the diaphragm will vibrate at the same frequency, making the signal audible, just like a speaker. If a speaker is wired backwards and its cone is vibrated, the frequency of that vibration will be turned into an electric signal can be played by a speaker. Electronic motors can also be turned into speakers. If the power input of the electronic motor is an audio signal, the electronic motor will turn on and off at the same frequency of that signal. This action effectively turns the motor into a speaker. Kristian Twombly demonstrated one of the possibilities that electronic motor speakers present by placing a small electronic motor on a 5 ft long span of packaging tape, suspended in the air between two points. The motor vibrated the tape and turned the entire span of tape into a very unique speaker. The motor was hooked up to a personal music player. The music could only be heard clearly if your ear was within a few inches of the tape. However, if you pressed your ear right up against the tape, the sound quality was much better. Also, the volume, tone, and timbre of the music is altered if you move your ear across the tape.