Non-conductor which has been given a permanent electrical charge: used in microphones and other transducers.
"You recently did a transfer to a CD of a reel-to-reel music tape with enhancements for me. I am very pleased weith the results. The sound quality and the absence of tape noise turned out to be pleasant surprises. The pricing was very reasonable and the CD is better than the tape was! I'll definitely use your service again when I get ready to ..."