All of Manhattan Is 'Lethally Noisy' 2.35K Brian Moylan 10/27/10 04:29PM Filed to: Megalopolis Megalopolis Science Studies Manhattan Noise shutterstock A study finds the noise in 98 percent of Manhattan's public spaces is above healthy levels. You may think you're used to the sirens, jackhammers, and trucks, but the racket raises blood pressure. Great, we'll soon be deaf and dead!