Comment by richardw

“ Sound waves from military submarine sonar systems can get as loud as 235 decibels. They are able to travel hundreds of miles and can maintain the intensity of 140 decibels as far as 300 miles from the source.”

That’s insane.

https://pressbooks.pub/tropicalmarinebio/chapter/noisy-ocean....

Probably worth checking since this source says loudest sound possible is 194:

https://www.hearingconservation.org/assets/Decibel.pdf