One advantage an electret has is its intrinsic charge, which eliminates the charging resistor, as shown on in Fig. 3. Either way, a fixed charge is maintained across the capacitor. The output voltage ...

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 ...

He and a friend stole wire from a telephone company lot ... way we locate the direction from which sounds originate. The electret microphone is small, affordable, and ubiquitous The lab was ...

There is actually more than one way to do this, but I want to go over two similar types of microphones: the condenser mic and the electret mic. In physics, we don't really use the term "condenser ...

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 ...