http://worldcat.org/entity/work/id/15193644

Commercial airport operations and community noise criteria

This study program involved response of 48 persons to seven different simulated commercial airport noise environments. Each exposure period was of 1-1/2 hours duration and subjects experienced and rated eight of these 1-1/2 hour noise exposure periods. The test environments simulated a conventional living room environment. Number of aircraft noise intrusions per exposure period ranged from 6 to 18 flyovers and indoor Leq(dBA) levels ranged from 38.9 to 52.1 dB. Some of the conclusions are: Noise exposure from a 'new' aircraft fleet mix (circa 1980) is clearly more acceptable than that from an 'old' fleet mix (circa 1965). Commonly used noise exposure methods such as NEF, Leq, and mean peak dBA are level dependent. Depending on the noise exposure method used, 2.5 to 4.0 dB is perceived as a reliable change in noise exposure. Predictive capability of a noise exposure method is a function of the engineering calculation procedure employed to weight the acoustic energy. Mean peak level exposure methods have greater predictive capability than energy summation methods. Leq(dBA) is a relatively poor predictor. (Author).

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