[gabbaman]

White noise machines provide a static sound like rain falling or wind blowing that has a volume control. I use one to sleep days after I've worked the night before. It completely allows my mind to relax without outside noise of dogs barking, guitar playing, loud talking or machine sounds to wake me up... unless the power goes out, then I have a reason to call in, so I have battery backup.

Not to say that sleep and meditation are the same. I feel if I had to meditate with white noise on I'd just fall asleep. One more excuse not to have to go to work, once I woke up to call in. But I'd never do that with intent to avoid my responsibilities.