A measure of the sharpness of resonance.
"My Wife’s sister had many old 33 LPs that had seen better days. On one of her visits to our house she asked if I could try and record some of her albums to cassette tapes as the LPs were really becoming worn and scratched. I recorded a few of the old albums, but gave up because the quality of the tapes was not any better than the LPs. My ..."