Other sensors include hydrophones for measuring sound in water or accelerometers for measuring vibrations causing sound.

Seismometers measure faint vibrations in the ground that tell of distant earthquakes.

Seismology is the study of what is under the surface of the Earth by measuring vibrations on the Earth's surface.

He could measure vibrations along the basilar membrane in response to different excitations frequencies.

They were also moving sensing equipment underground to measure vibrations from cranes and other heavy machinery that are moving debris away from the street above.

"A passive seismic experiment to measure lunar vibrations from whatever source."

Inside the tunnel a seismic monitor, with a delicate needle that measures vibrations, will provide graphic evidence of any excessive tremors.

So you can measure tiny terminal expansions or vibrations in mechanical systems.

Seismometers sunk into firm rock can measure faint vibrations in the earth from distant earthquakes, and networks of them can provide clues about geological structures deep beneath the earth.

Detection systems to measure highway curves, motions and vibrations were developed so that future mass transit systems would be fast, comfortable and safe.