This is a unidirectional electret microphone with high sensitivity. Audio recording, voice recognition, and other audio sensing projects/circuits use this microphone. Long-lasting metal body and high-quality diaphragm for consistent audio sensing.
Electret Condensor Microphone is a type of electrostatic capacitor-based microphone, which eliminates the need for a polarizing power supply by using a permanently charged material. An electret is a stable dielectric material with a permanently embedded static electric dipole moment (which, due to the material's high resistance and chemical stability, will not decay for hundreds of years). It got this name from electrostatic and magnet, drawing an analogy to the formation of a magnet by the alignment of magnetic domains in a piece of iron. Electrets are commonly made by first melting a suitable dielectric material such as a plastic or wax containing polar molecules and then re-solidify in a powerful electrostatic field. The polar molecules of the dielectric align themselves to the direction of the electrostatic field, producing a permanent electrostatic "bias". Modern electret microphones use PTFE plastic, either in film or solute form, to form the electret.
|Max. Operating Current||500µA|
|Sensitivity Reduction||within -3dB at 1V|
|Signal to Noise Ratio||58dB|