This is the second part of a program concerning noise certification for V/STOL and helicopter aircraft. Aspects considered were: an engineering calculation procedure which validly and reliably reflects annoyance to helicopter operations; estimates of noise exposure levels which could be compatible with human activities in areas surrounding heliports; noise exposure modeling for helicopter noise; certification measurement approaches for helicopter noise certification. The basics of the program involved human response evaluations of conventional takeoff and landing (CTOL) aircraft noise, simulations of helicopter noise emphasizing 'slap' or pulsating noise effects, and recordings of a wide variety of helicopter operations.
Noise Certification Considerations for Helicopters Based on Laboratory Investigations
1976
108 pages
Report
No indication
English
Noise Pollution & Control , Aircraft , Noise pollution , Helicopters , Short takeoff aircraft , Psychophysics , Aircraft noise , Acoustic measurement , Human factors engineering , Intensity , Exposure(General) , Statistical processes , Simulation , Models , Analysis of variance , Environmental protection , Experimental data , Community relations , Laboratory tests , Annoyance , Noise levels , Certification
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