Here is an Electret Condenser Microphone – ECM preamplifier circuit based on ultra low noise BC650C transistors. Due to difficulty of finding BC650C, instead of them, as you can see in the schematic, ...

Using a speaker as a microphone is a trick old enough to have become common knowledge, but how often do you see the hack reversed? As part of a larger project to measure the acoustic power of a ...

A friend of mine is producing a series of HOWTO videos for an open source project, and discovered that he needed a better ...

James West is the co-inventor of the electret microphone used in telephones, sound recording devices, hearing aids, and other products. A research professor of electrical and computer engineering and ...

There are different kinds of microphones, but they all do about the same thing, which is to turn acoustic sounds into electronic signals that can be amplified, modified, or recorded. When you speak ...

Microphones can be found just about everywhere nowadays. Most people reading this article will have a cell phone in their pocket which uses a microphone to transmit an audio signal to other phones all ...

The “cube” in this tale was the sound booth at Springfield Assembly of God Church (Springfield, VT), where I'm the sound man. We have an electret microphone hanging from the sanctuary ceiling that ...