If anybody wants to get rich in 20 or 30 years...invest in hearing aids.
Not a day goes by that I don't hear a new song on the bus. Oh its not on the radio, mind you. Its often coming from the person sitting next to me, or maybe near me, on the bus. But occasionally...occasionally it comes from someone sitting far too far away. The music is just far too loud.
And I don't mean the "I'm an old man so turn down that racket", type of loud. I mean the "hey, you're going to have significant hearing loss throughout 50-75% of lifetime if you keep that up". What really kills me is when people will say, 'well I have to have it this loud because I can't hear it otherwise"...my response: "guess why you can't hear it? Now multiply that by a factor of x number of years and you have a perfect recipe for the permanent hearing loss.
Not all of these people will develop hearing loss. Most won't. My guess is, most of them will get sick of Justin Bieber or Katy Perry, and Jazz music just doesn't sound as good when it hurts. But for the ones who do, I really do hate to say it, but I told you so.
Oh and so did the Canadian Hearing Society, and the Public Health Agency of Canada. So there.