James E. West and Gerhard M. Sessler did together.
The electret microphone was invented in the 1960s. It was developed by James West and Gerhard Sessler at Bell Labs in 1962. This innovative microphone uses an electret material to maintain a permanent electric charge, allowing for high sensitivity and compact design, which has made it widely used in various applications today.
The electret microphone is based on the electret capacitor, which is a special capacitor with quasi-permanent charge. Vibrations in the air are picked up by the capacitor, which generates an equivalent vibrating electrical signal. Unlike a traditional condensor (another name for capacitor) microphone, the electret does not require a power source.
One can purchase a Sony ECM DS70P Electret Condenser stereo microphone from the Sony store for $74.99. However, one can try to get microphone for a cheaper price on Amazon or eBay.
yes, it transduces sound waves to voltage variations
Energizer EPX76
The inventor of the —foil electret microphone with Gerhard Sessler in 1964 in the Bell Lab.
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To check an electret microphone, first ensure it is properly connected to a power source, as it typically requires a bias voltage. Use a multimeter to test for continuity and check the voltage at the mic's output to confirm it’s receiving power. You can also connect it to an audio input device and speak or tap near the microphone to see if it picks up sound. If there's no output, consider testing with a different audio interface or replacing the mic.
In 1877, German immigrant, Emile Berliner invented the microphone.
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David Edward Hughes invented the carbon microphone. He lived from 1831-1900, and lived in London, England.
E.C. Went