Phase 2 of the 'Aircraft Noise Definition' program consisted of a DC-8-61 flight test program with an objective to improve the statistical accuracy of the noise data reported in Phase 1 of the program and to broaden the data to include measurements at long distances and at a thrust required for a steep approach. Noise measurements were made during flyovers up to an altitude of 8000 feet, at sideline distances up to 8000 feet and at target thrusts of 15,000, 10,000, 5000, 3200, and 2000 pounds. This document reports the data acquisitions, the analysis procedure, and the results in terms of variations in reference-day EPNL and A-weighted sound level with slant range; overhead to sideline noise level relationship; and data showing lateral noise attenuations. Data accuracy is described in terms of assignable confidence limits.
Aircraft Noise Definition. Phase II. Analysis of Flyover-Noise Data for the DC-8-61 Aircraft
1974
172 pages
Report
No indication
English
Acoustics , Noise Pollution & Control , Air Transportation , Aircraft noise , Commercial aircraft , Jet aircraft , Definitions , Data bases , Long range(Distance) , Flyby , Altitude , Flight paths , Data acquisition , Variations , Confidence limits , Weather , Flight testing , Acoustic measurement , Attenuation , Propagation , Data processing , Thrust , Upper atmosphere , DOT/4DZ/DA , DOT/5B , DC-8 aircraft
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