The prediction of en route noise levels for a DC-9 aircraftEn route noise for advanced propfan powered aircraft has become an issue of concern for the Federal Aviation Administration. The NASA Aircraft Noise Prediction Program (ANOPP) is used to demonstrate the source noise and propagation effects for an aircraft in level flight up to 35,000 feet altitude. One-third octave band spectra of the source noise, atmospheric absorption loss, and received noise are presented. The predicted maximum A-weighted sound pressure level is compared to measured data from the Aeronautical Research Institute of Sweden. ANOPP is shown to be an effective tool in evaluating the en route noise characteristics of a DC-9 aircraft.
Document ID
19880034970
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Weir, Donald S. (PRC Kentron, Inc. Hampton, VA, United States)