Another stupid study that "proved" the last study was wrong. The funny thing is they make you wear hearing protection, then they wonder why you don't hear a truck and thus get run over, so they make a warning that is loud as Fck and wonder why you start going deaf again, then they come out with this noise that sounds just like air brakes or a water separator blast, but oh woops still have my ear plugs in so can't hear it.....smh<br>Oh did I mention I have to wear all this while I type on my computer