That's what worries me, a bit louder may cause me harm whilst listening to loud bangin' tunes. I think if you could set an absolute volume for TP as opposed to a "hush" type decrease then the benefits would be twofold:

Maybe you want your music quiet while you chat but you do want to hear the TP when it starts (Business trips)

Maybe you're driving on your own with loud music but do not want to be shrieked at by the flying eye.


Edit: Shrieked at by the Flying Eye.

Hmm, looks a bit dubious when I see it now, conjures up all sorts of images. Maybe its because I work for a Japanese company.