Abstract:

Noise levels due to aircraft departures were measured at four locations near Minneapolis--Saint Paul International Airport and at seven locations near Los Angeles International Airport. A-weighted overall levels and one-third octave band levels between 25 and 80 Hz were obtained. Levels for 46 aircraft were analyzed for Minneapolis and 122 for Los Angeles. A linear regression was performed on the low-frequency levels versus the A-weighted levels for the locations to the sidelines of the active runways. The relationship between low-frequency noise and A-weighted sound pressure level for different distances was applied to A-weighted levels obtained from INM to estimate the low-frequency noise levels from a proposed runway. Estimates were made regarding which parts of the community would experience perceptible vibrations.