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2. Electret microphone - Wikipedia

   en.wikipedia.org/wiki/Electret_microphone

   Electret microphone capsules This typical electret microphone circuit has a common source configured JFET inside the two-terminal electret capsule. The JFET is externally-powered by the DC voltage V + through a resistor which sets the gain and output impedance .

3. File:Electret condenser microphone schematic.svg - Wikipedia

   en.wikipedia.org/wiki/File:Electret_condenser...

   English: A typical electret microphone preamp circuit uses a FET in a common source configuration. The two-terminal electret capsule contains an FET which must be externally powered by supply voltage V +. The resistor sets the gain and output impedance. The audio signal appears at the output, after a DC-blocking capacitor.

4. Microphone - Wikipedia

   en.wikipedia.org/wiki/Microphone

   First patent on foil electret microphone by G. M. Sessler et al. (pages 1 to 3) An electret microphone is a type of condenser microphone invented by Gerhard Sessler and Jim West at Bell laboratories in 1962. [24] The externally applied charge used for a conventional condenser microphone is replaced by a permanent charge in an electret material.

5. List of microphone manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_microphone...

   The following is a list of defunct microphone manufacturers with articles. Aiwa; Altec Lansing; American Microphone; Ampex; Astatic; Brush Development Company; Dynaco ...

6. Phantom power - Wikipedia

   en.wikipedia.org/wiki/Phantom_Power

   The transient generated when a microphone is hot-plugged into an input with active phantom power can damage the microphone and possibly the preamp circuit of the input [10] because not all pins of the microphone connector make contact at the same time, and there is an instant when current can flow to charge the capacitance of the cable from one ...

7. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio .