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This article is about transducers in mechanical and electrical engineering. For other forms of transduction, see Transduction. This article does not citeany references or sources. (December 2006)
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A transducer is a device, usually electrical, electronic, electro-mechanical, electromagnetic, photonic, or photovoltaic that converts one type of energy or physical attribute to another for various purposes including measurement or information transfer (for example, pressure sensors).

The term transducer is commonly used in two senses; the sensor, used to detect a parameter in one form and report it in another (usually an electrical or digital signal), and the audio loudspeaker, which converts electrical voltage variations representing music or speech, to mechanical cone vibration and hence vibrates air molecules creating acoustical energy.

Types of transducers

This list is confined to the narrower definition of the term.


  • J. Allocca and A. Stuart, Transducers: Theory and Application, Reston 1984.

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