Also called normal impedance. The input impedance of a transducer when the load impedance is zero.
"My Father was killed in an automobile accident on 3 Dec. 1959. The mortuary recorded the funeral on a reel-to-reel tape and gave it to the family. It has never been listened to in all these years since we had no way of playing the tape. When I lucked out and won some money on the Lottery, I invested it in a computer. One of the first things I ..."