A contact microphone picks up vibrations directly from a solid surface or object, as opposed to sound vibrations carried through air.

That summer, he attached contact microphones to the windows of his studio on the 91st floor of Tower One to pick up ambient outside noise.

These vibrations then continue to the wooden-block base, which in turn is amplified by the contact microphone(s) therein.

Cellotape, for cello with contact microphone, piano, and tape (1965)

His Daxophone is a single wooden blade fixed in a block containing a contact microphone, which is played mostly with a bow.

His Daxophone consists of a single wooden blade fixed in a block containing a contact microphone.

A piezo sensor attached to the body of an instrument is known as a contact microphone.

The former is for "any ensemble from 86 instruments," with as many of the instruments as possible amplified through contact microphones.

Since the windows couldn't be opened, he attached contact microphones to them to listen to "the heart and soul of the building," as if through a stethoscope.

The band also planned to attempt using newly developed contact microphones to record the sounds made by the human body while dancing.