Introduction

Summary

A microphone is a transducer that converts a mechanical (acoustic) wave to an electrical signal. From this point of view,  it is the symmetrical oppposite of  a loudspeaker. There are different types of microphones. In each case, we find something vibrating under the influence of a sound wave and the use of a physical law to convert this mechanical vibration to an electric signal.

Goals

• To define what is called a transducer.
• To distinguish between different microphone technologies.
• To illustrate an application of capacitors (used as accelerometers).
• To illustrate an application of Faraday induction.
• To illustrate an application of piezoelectric crystals.

 

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Tags

microphone mike sound capacitor music transducer piezoelectricity