[throw827474737]

190 dB ???!? Is that different under water, and how much is left after 10m?

I mean 130-140 dB is the jet engine and the range were exposure without plugs is painful and longer than few seconds causes damage. This is 6 magnitudes higher, how can this be a good idea?

(Sounds like microwave wireless energy transmission: it's great, unless you care for birds which just get roasted if they fly through the beam?!).

[thesausageking]

Sound pressure readings under water are different than in the air. They're measured at 1µPa instead of 20, and water has a higher impedance.