A computer program to predict the effective perceived noise level (EPNL), the tone corrected perceived noise level (PNLT), and the A-weighted sound level (dBA) radiated by a V/STOL vehicle as it flies along a prescribed takeoff, landing, or cruise flight path is described in detail and a complete users guide for the program is presented. The procedures used to predict the noise radiated by helicopter rotors, propellers, turboshaft engines, lift and cruise fans, and jets are described in detail. Helicopter rotor noise and jet noise are theoretically predicted with some empirical modifications while propeller, fan, and turboshaft engine noise is calculated with primarily empirical procedures. The program is designed to be easy to use; thus it shoud be useful in V/STOL-port planning studies.
Prediction of V/STOL Noise for Application to Community Noise Exposure
1973
278 pages
Report
No indication
English
Noise Pollution & Control , Aircraft noise , Vertical takeoff aircraft , Short takeoff aircraft , Mathematical prediction , Central city , Noise analyzers , Turbojet engines , Rotary wings , Aircraft propellers , Fans , Flight paths , Computer programs , Acoustic measurement , Jets , Effective perceived noise levels
AIAA | 1976
|Aeroacoustics: STOL noise; Airframe and airfoil noise
NTRS | 1976
|STOL noise sources and fan noise treatment
NTRS | 1972
|Panel Discussion: STOL and Rotor Noise
AIAA | 1975
|Noise Considerations for V/STOL Transports
NTRS | 1968
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