On the recordJuly 17, 2017
. . . the sound from air gun activities which in fact is an enormous and obvious impact, we're talking about something that a blast that is one of the loudest anthropogenic sounds in the entire ocean that gets repeated every 10 to 12 seconds for days, weeks or even months at a time, it is similar in its decibel level to this air gun (airhorn) that I have right here, to put that in context this air gun (airhorn) has an output of about 120 decibels, it can be heard up to a mile away, it's only a little bit less loud than a jet engine at takeoff . . . it's also important to remember that water transmits sound differently than air, its actually more efficient . . . a significantly loud and frequent blast of noise, I think, would be a distraction from our work, wouldn't you agree?
Source
congress.gov
