They use inertia switches.
accelerometer
A sensor can be used on a car for a number of things car alarm, video sensor, traffic sensor Type your answer here...
Fap
Vibration
This knock sensor contains a phezioelectric material.
It's a sense organ, used to detect movement and vibration in the surrounding water.
Sound waves, though deeper into it, not much though, LOL., i do belive it is hectrepascals.
by vibration
the typeof sensor a key board is g45 to the resper of g54 that's the anatical enngine used
Oxygen sensor
Compressional vibration is a term used to describe a vibration that occurs as the result of compression. Compression can be described as when particles are pressed or forced together. Vibration occurs as a result of this pressure.
Vibration is to move or cause to move continuously and rapidly to and fro. It is used in massage.