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piezoelectric

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The property of certain crystals that causes them to produce voltage when a mechanical pressure is applied to them such as sound vibrations. This technique is used to build crystal microphones, phonograph cartridges and strain gauges, all of which turn mechanical movement into voltage.

The piezoelectric effect also works in reverse, causing an oscillation when the material is subjected to electrical pressure (voltage). For example, earphones and inkjet nozzles are made with piezoelectric materials. See inkjet printer.


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Key statement: A tire assembly with integrated power generation features includes piezoelectric devices and power conditioning modules.
The device employs the company's piezoelectric bone conduction technology to transmit sound vibration from the skull to the auditory nervous system to enable the hearing impaired and the elderly with difficulty in hearing to effectively communicate via a cellphone.
Single-wire connection for piezoelectric cavity-pressure sensors was introduced for small parts last year by Kistler Instrument Co.
 
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