Thanks Jbuckl. I think during those periods when I was in pain for weeks on end even 5 minutes of sensory deprivation would sound pretty good. Work with PCS patients though sounds like it would have to be strictly controlled.

One thing I read on Wiki (link below) a moment ago is that hallucinations have occurred with some people which means the brain would be pretty stressed. Of course, that would depend on the images that appeared in the brain. Images of lying on a beach in St. John seems like it would be pretty good for the brain

One thing I did yesterday for sound deprivation is order a pair of firearms shooting earmuffs (34db). Combined with ear plugs I don't expect to have a problem with the snowblower or lawnmower. Below is a link to the ones I purchased. Lots of good reviews.

ClearArmor Earmuffs http://tinyurl.com/hyvk286

Sensory Deprivation on Wiki https://en.wikipedia.org/wiki/Sensory_deprivation