If you can't sleep without background noise like a fan or TV, it might have something to do with your mental state, and it probably isn't actually helping your sleep.

“It’s random, but there’s different kinds of random,” he said. Not all noise is equal, as seen in these spectrograms in which low frequencies are at the bottom, high frequencies are at the top, and ...

Background noise in a video can be distracting and make the video less watchable. Most devices pick up background noise immediately as they record the video. Background noise can occur for a variety ...