When designing a microphone assembly the other day, I reached for an electret condenser microphone capsule without thinking. To be strictly accurate I ordered a pack of them, these small ...

Work on the electret condenser microphones dates back to as early as 1928. Eventually, a few microphone models with wax electrets were offered commercially in the late 1930s. (See reference [1] at the ...

Electret microphones are capable of high-quality output, and are prized for their smooth frequency response. However, unlike other types, they can’t simply be plugged directly into a mixing desk.

In two articles thus far (RW Engineering Extra, Aug. 10 and Oct. 19, 2016), we’ve traced the origins of electret condenser microphones to their externally-polarized ancestor, patented in 1916. One ...

Power is necessary for establishing the capacitor plate voltage and is also needed to power the microphone electronics. An electret microphone is a type of condenser microphone…[in which] the ...

Of all of the types of microphones in use today, the electret microphone is the most commonly used version; 90 percent of all microphones used today are of the electret variety, resulting in ...

Part 1 of this DI uses an electret mic to detect infrasound. It starts with a basic equalization circuit validated with a DIY test fixture and simulations, and ends with a deeper analysis of the ...

West, now a professor of electrical and computer engineering at Johns Hopkins University, invented the electret microphone in the early 1960s. Today, West's invention accounts for 90 percent of ...

For example, the microphone used in a 1960s hearing aid would amplify the sound of a footfall so much that it could be almost painful to walk while wearing one. The electret microphone developed ...

In 1962, West co-invented the foil electret microphone, which 90% of all microphones used today — including telephones, music recording equipment, and hearing aids — are based on. The electret ...

Of all of the types of microphones in use today, the electret microphone is the most commonly used version; 90 percent of all microphones used today are of the electret variety, resulting in ...