Calculation procedures to describe airplane noise during takeoff and approach have been programmed for batch operation on a large digital computer. Three routines are included. The first normalizes far-field noise spectra to reference conditions and then determines spectra at various distances from the airplane, for airport elevations between sea level and 6000 feet and ambient temperatures between 30F and 100F. Overall sound pressure levels, A-weighted noise levels, perceived noise levels, and effective perceived noise levels are calculated. The second routine uses aerodynamic and engine thrust data to produce takeoff and approach flight path description. Volume 2 includes L-1011-1 noise propagation and airplane performance and samples of contours.
Commercial Aircraft Noise Definition - L-1011 Tristar. Volume II-L-1011-1 Data
1974
302 pages
Report
No indication
English
Air Transportation , Noise Pollution & Control , Commercial aircraft , Jet transport planes , Jet plane noise , Aircraft noise , Jet engine noise , Aerodynamic noise , Noise pollution , Acoustic signatures , Acoustic attenuation , Takeoff , Aircraft landings , Statistical data , Noise levels , L-1011 aircraft , DOT/4DZ/DA , DOT/5B