Area Equivalent Method on LOTUS 1-2-3TM

摘要

The Area Equivalent Method (AEM) is a mathematical procedure that provides the noise contour area of a specific airport given the types of aircraft and the number of operations for each aircraft. The noise contour area is a measure of the size of the land mass enclosed within a level of noise as produced by a given set of aircraft operations. The noise contour metric is the Day Night Average Sound Level (DNL) which provides a single quantitative rating of a noise level over a 24-hour period. This rating involves a 10 decibel penalty to aircraft operations during nighttime (between 10pm and 7am) to account for the increased annoyance in the community. This document contains instructions to execute AEM. The AEM requires the LOTUS 1-2-3 software package and an IBM personal computer or a calculator. The AEM is easy to use and is intended as a screening procedure to determine the need for an airport Environmental Impact Statement (EIS). This document is the second in a series of reports on the AEM. The first report was AD-A141 430.