Did anyone see the Speaker Vest for the Deaf?

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I was watching American Inventor tonight...I didn't get to see all of it but I did see the speaker vest designed for the Deaf. Deaf people and hard of hearing people would wear the vest and be able to "feel" the music which allows them to appreciate and enjoy music like hearing people. I think this idea is wonderful and I'm completely excited about it. My youngest son was profoundly deaf and I would have bought one of these vests for him...in fact, if they are produced, I might just buy one and give it to some one in memory of him! (My son passed away last year waiting on a liver/small bowel transplant) So..did you all see this and what do YOU think? What other inventions did you see that I missed?