• 130 db? I am an audio tech on the side and I have trouble imagining that level of sound. As your link says, think jet engines at close range.

    I have a vision etched in my memory of, back in the 1970s, watching through a window while the Halon system in our campus computer center dumped (false trigger), with one poor guy still in the machine room pressing the (non-functional) override switch with all his might. The system was wired incorrectly, it turns out.

    We were down for quite a while. No humans were injured; just shaken up a bit. The machine room was a mess. Every bit of dust was redeposited somewhere else. It was loud, but not 130db loud!

    (Edit: that was the 70's, not the 80's!)