Quote Originally Posted by Wheels View Post
Using this calculator 120db at the the source would be down to 40db at 10,000 meters. At 16,00 meters it would be down to 35db. that could be considered loud. It would have to be 150db to still be 70db at 10,000 meters. There would be destruction at the source LOL,

http://www.sengpielaudio.com/calculator-distance.htm
Quite a link thx for the info.