electret microphone

Many players have a built-in electret microphone which allows recording.

It is often used for powering electret microphones, which will not function without power.

Electret microphone bias is sometimes supplied on a separate conductor.

For example, they are used in electret microphones and in copy machines.

Electret microphones use a polarised condenser instead of a crystal.

The integrated preamplifier in a foil electret microphone.

Along with Gerhard Sessler, West developed the foil electret microphone in 1962.

There are three major types of electret microphone, differing in the way the electret material is used:

The Maplin unidirectional electret microphone insert specified for this popular project has now sold out, and further supplies are unlikely to be available.

An electret microphone is a type of condenser microphone that eliminates the need for a power supply by using a permanently charged material.

Devices that use a "plug-in powered" microphone: an electret microphone containing an internal FET amplifier.

Electret microphone elements typically include a junction field-effect transistor as an impedance converter to drive other electronics within a few meters of the microphone.

In 1962, the electret microphone was invented by Gerhard Sessler and James Edward Maceo West.

Modern electret microphones use PTFE plastic, either in film or solute form, to form the electret.

Electret microphones and condenser microphones employ electrostatics-as the sound wave strikes the microphone's diaphragm, it moves and induces a voltage change.

An electret microphone is a type of capacitor microphone invented by Gerhard Sessler and Jim West at Bell laboratories in 1962.

Incorporated in Sony's uncommonly compact EMC-909 electret microphone ($99.95), the MS principle helps even inexperienced recordists to obtain pleasing results.

It should work with all nonpowered dynamic microphones and has plug-in power that works with low-power electret microphones but does not provide enough power for some microphones.

Luckily for amateurs, somewhat less exact-ing models can be had for far less, and a simplified version of the condenser microphone, called an electret microphone, may sell below $100.

James Edward Maceo West (born 1941), co-inventor of the foil electret microphone and member of the National Inventors Hall of Fame.

Sessler invented together with James E. West the foil electret microphone at Bell Laboratories 1962 and the silicon microphone (co-inventor: D. Hohm) in 1983.

Due to their good performance and ease of manufacture, hence low cost, the vast majority of microphones made today are electret microphones; a semiconductor manufacturer estimates annual production at over one billion units.

The handset speaker (the receiver) functions normally, even though its polarity is reversed; but the electret microphone used in most modern handsets as a transmitter does not function normally when it is reverse connected.

Though electret microphones were once considered low quality, the best ones can now rival traditional condenser microphones in every respect and can even offer the long-term stability and ultra-flat response needed for a measurement microphone.

Power may be needed either for a device that requires power such as a pre-amp on an electret microphone or because the microphone is a type that intrinsically requires powering such as a condenser microphone.