In acoustics, a place at which a train of sound waves is cancelled by reflections arriving out of phase with the wanted signal thus creating an area of silence or poor audibility.
"My son found a rare 45 copy of a band I used to be in almost 50 years ago. He purchased it on Ebay. Somehow it had found a following in Europe. It did have a few scratches and pops but after the clean-up and audio restoration done by LP2CD I was amazed. We recorded that when 16 track analog tape recording was a big deal. The fidelity was ..."