Be aware of your ears.
I’m aware that anything sponsored by companies in this way may look suspicious, but on the other hand, I wouldn’t care personally, at least not in this case, because of my own experiences with the topic (I’m suffering from tinnitus since around 1989.) And I’d rather have hearing aid producing companies sponsoring such initiatives than increasing the number of hearing problems amongst the “iPod generation” causing a lot of additional expenses in the health care systems of our home countries. Which might become relevant even for the US in the foreseeable future…
So, please take a look at http://hear-the-world.com