Development of airport noise contours by extensive noise monitoring and analytical modeling

Abstract

This paper describes one of the first known efforts to combine analytical modeling techniques and extensive field noise monitoring to produce airport noise contours. The objective was to produce community noise equivalent level (CNEL) contours whose accuracy could be enhanced and defended by field measurements. An advanced computer simulation model (developed for the U. S. Air Force) was used in concert with 24-h noise monitor data at 44 locations surrounding Miramar Naval Air Station at San Diego, CA. A three-phase study was undertaken to satisfy the objective: (1) develop a preliminary set of contours using the analytical model and the best available data base, (2) use contours to select noise monitor locations and acquire monitor data, and (3) normalize monitor data to typical flying conditions and update noise contours. The paper discusses the variables involved in generating the contours, their ability to be reliably measured at reasonable cost, and their relative impact on contour accuracy.