The measures taken to reduce the emission of unwanted sounds/vibrations in a given environment. Commonly referred to within;
1. Aviation: the procedures adopted to reduce aircraft noise on takeoff and landing - accomplished by reducing the power setting or avoiding densely populated areas.
2. Sex: the methods adopted to reduce the noise of fucking in an area surrounded by people. It is induced by; the rapid reciprocal motion of the woman's dangly beef curtains; the flapping noise of her pecky saggers as she receives intense drilling; or the moaning and groaning of the whore caused by the 15-inch bratwurst that's pounding her brains out. Solutions include using gaffer tape to stop the kebab lips from drooping and swaying, and stuffing her throat with your nozzle (or gravy) to extinguish all sound.
1. *1500 feet MSL*: "Noise abatement procedures please, so we can shut those god-damn environmentalists up."
2. "Dammit Louise, the pink lips of your bearded clam are fluttering against my wang! Grab the cooter tape, we need to enforce noise abatement!"