The whooshing noise of their Level V CO filtering machines lull them to sleep.
Come on down to my place.
And see if they can withstand the turbocharged lungs of Foghorn Leghorn.
The ********* obviously waits to see if movement is detected inside the structure. If not, he flaps up near a window and repeats until he hears Marine drill instructor grade obscenities about threats of impending chicken tacos.
The worst sleeping I ever had was when I was about 200 meters from a battery of 105 mm howitzers. I cannot complain about generators today because I am clinically deaf.