Well this is interesting. I would have immediately pooh-poohed it if it didn't have a degree of confirmation from Stanford University, which concluded:
"TSC outputs an algorithmic acoustic signal with a preset intensity to the frequency band of the damaged hair cell. Previously published human data, and this prospective clinical study demonstrate a statistically significant improvement in a narrow band frequency threshold. These data have important clinical implications as a potential long term therapy for this widespread and growing disability."
Sounds like it's not exactly a miracle cure which is going to restore hearing back to how it was when you were 5, but it does sound like some pretty amazing advances are in store.
http://www.digitaltrends....-improve-your-hearing/