.....

At an output of 30,000 Watts and 165dB, this speaker can be physically dangerous - consider this:

- at 135 dB you experience a slight cooling sensation from the air

- at 140 dB your throat and vocal chords start to vibrate

- at 142 dB your chest starts to pound intensely

- at 148 dB the vibration because uncomfortable and even painful

 

.....

Wyle has demonstrated its low-frequency noise reduction technology at various locations including Baltimore/Washington International Airport. The US Army uses the WAS 3000 in a speaker setup called "The Mother of All Speakers " for battlefield simulations.

http://www.noiseaddicts.com/2008/09/loudest-speaker-in-the-world/