There were transducers at Nakhon Nayok when we moved here June 13, 2000. Commercial transducers were purchased by the Nakhon Nayok Torture Group and located them west of our house on the South Side on the side of the mountain. The commercial transducers pumped out heavy ultrasound and infrasound at approximately 210 decibel and would run a steady 164decibel 7by24 with the ultrasound. The USA Navy sets 140 dB as the maximum level of safe exposure to humans. See dangers of SOUND: httpwww.lowertheboom.orgtri 28mar12 I have over 600 recordings of ultrasound and infrasound coming from commercial strength(up to 164 decibel) transducers that are used in CHINA for crowd control...very strong and dangerous. Too much of this too close will easily kill human beings. The first to die will be the old and the ones predisposed to strokes, aneurysms, heart attacks and old age. Babies in their first year of growth with the sof spots and the first year the brain grows the most and also the fight or flight syndrome for the babies, causing them to be over active, no appetite, no sleep. These recordings were made in Nakhon, Thailand and Klong Ten, Thailand starting back in the year 2009 when my baby boy was born(april 29, 2009)..he is still being tortured 28mar12. I have called the perpetrators The Nakhon Nayok Sadist Torture Group. i know them see a few samples http://www.acidplanet.com/artist.asp?play=788091&T=1515