Noise complaints your problem? Give a holler to Al Fierstein, a professional acoustic consultant who makes the bulk of his living telling clubs like the Tunnel and the Roxy how to keep quiet. "Some of the measures I use -- and this varies in every case -- include putting up extra Sheetrock, lead lining for the walls, baffling on air-conditioning systems, concrete-block walls and sand-filled walls and ceilings, sound locks so noise doesn't travel around doors into the street," he says. The savviest owners, however, also take their own precautions. The proprietorsThe Full Article is available on the New York Magazine Web Site.