Might as well connect it to an Ipod as well?

I find hearing to be one of the most useful senses, when it works. After all, hearing is passive, you don't have to turn it on or off, or direct it in any particular direction. With hearing you get proximity awareness with location of other vehicles, approximate distance, speed, and rate of approach for other vehicles, and an idea about what kind of vehicle is approaching. All with no effort on your part. I choose not to impair hearing when on the bike.

I just wish hearing worked better under more diverse circumstances, like when there was a lot of other traffic noise, over 15mph with wind noise, and could detect other, more quiet vehicles.

I used to use earplugs on my motorcycle frequently, that helmet wind noise was deafening!