An acceptable exposure level for aircraft noise in residential communities

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A review of existing guidelines and noise laws relating to aircraft indicated that they were governed, not by the acceptability of the aircraft noise to an exposed community, but by economic considerations. To examine the impact on aircraft noise requirements of a change in emphasis, from vehicle economy to noise acceptability, existing literature was used to estimate the maximum noise exposure from aircraft that a community would probably find acceptable. The suggested limit is 90 ± 5 PNdB for twenty noise events per day. Ideally, this noise level should fall within the airport boundary or on non-residential land.