Progress in aeroacoustical theory and experiments reviewed. Report summarizes continuing U.S. Army programs of research into causes of noise generated by helicopters. Topics of study include high-speed impulsive noise, blade/vortex-interaction noise, and low-frequency harmonic noise.
Research In Helicopter Noise
NASA Tech Briefs ; 15 , 8
1991-08-01
Sonstige
Keine Angabe
Englisch
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