A microphone in which the diaphragm is one plate of a capacitor.
"I have just listened to the CD that you made from the at least 44 year old 33 1/3rd rpm album I sent you. The record was of lousy quality to begin with. It had been a private label recording -- a vanity record -- recorded by a group of local Dixieland musicians in the late '60s. I was never able to play it or enjoy it because it had such a ..."