I found these two articles over at earplugs’s blog.
This one from Wired contains this amazing paragraph:
More than 50 years ago, Austrian researcher Ivo Kohler gave people goggles that severely distorted their vision: The lenses turned the world upside down. After several weeks, subjects adjusted â€” their vision was still tweaked, but their brains were processing the images so they’d appear normal. In fact, when people took the glasses off at the end of the trial, everything seemed to move and distort in the opposite way.
Yeah, that sums up what I’m hearing!Â It isn’t upside down of course, but the feeling over distortion and overwhelming-ness sounds about right.Â It also helps explain why my hearing aid, which was normal for 15 years, sounds distorted now when I try to switch back.Â It’s as unbelievable to me that what I’m hearing will sound ‘normal’ as that upside down vision could become normal.
The rest of that article, and this one talk about equally amazing things like being able to see with your tongue.