ASA 126th Meeting Denver 1993 October 4-8

5aNS5. The Lookup program for prediction of noise levels outdoors.

Michael J. White Y. L. Li

U.S. Army Construction Eng. Res. Labs., P.O. Box 9005, Champaign, IL 61826-9005

A rigorous calculation of the noise level away from a broadband source of known characteristics under known meteorological conditions requires considerable computational effort. However, many practical situations fall into easily described classes of meteorological condition, source and receiver height, ground type, etc. Results have been of tabulated full-wave acoustic calculations, systematically changing the source and receiver configuration, frequency, and environmental parameters. The Lookup program accepts a one-third octave source spectrum, source and receiver configuration, ground condition, and meteorological profile, then accesses the Lookup table for the nearest case and estimates the receiver spectrum. It does this in under 1 s on a PC.