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Earphones and Other Transducers

A transducer is a device that converts one form of energy to another, known as input–output devices. In audiology and acoustics, transducers are primarily in the form of loudspeakers that transform electric voltage to sound, or microphones that convert sound to electric voltage. But the transformation could be between electrical and mechanical energy (vibrations) using vibrators or shakers to convert from voltage to a vibration and accelerometers to convert from a vibration to voltage. This entry describes loudspeakers, earphones (headphones), microphones, audiometric devices, and hearing aid transducers.


A loudspeaker is a transducer that converts voltage to sound pressure and is often referred to as an electroacoustic device. Its main purpose is to convert the electrical signal to a corresponding acoustic signal where the voltage is ...

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