Measuring the Effects of Noise Pollution on Crewmembers, Comparing Assessment Methods

Abstract

The primary energy in those noises lies in the low frequencies, ranging mostly from 100 to 300 Hz, with a rapid decrease as frequency increases. The overall sound intensity varies from about 70 dB(A) to more than 100 dB (A). Generally, the quietest cockpits are found in jet aircraft; the noisiest are found in open cockpit airplanes such as those used for aerial application in agriculture and in sots srrallmilitary jets that use afterburners. When the noise level in the cockpit, exceeds 88 dB(A) the crewmembers efforts should be made to aid communication.