Laboratory Studies of Scales for Measuring Helicopter Noise
Author | : J. B. Ollerhead |
Publisher | : |
Total Pages | : 130 |
Release | : 1982 |
Genre | : Aerodynamic noise |
ISBN | : |
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Author | : J. B. Ollerhead |
Publisher | : |
Total Pages | : 130 |
Release | : 1982 |
Genre | : Aerodynamic noise |
ISBN | : |
Author | : J. B. Ollerhead |
Publisher | : |
Total Pages | : 128 |
Release | : 1982 |
Genre | : Aerodynamic noise |
ISBN | : |
Author | : Harvey H. Hubbard |
Publisher | : |
Total Pages | : 452 |
Release | : 1991 |
Genre | : Aerodynamic noise |
ISBN | : |
Author | : Harvey H. Hubbard |
Publisher | : |
Total Pages | : 456 |
Release | : 1991 |
Genre | : Aerodynamic noise |
ISBN | : |
Author | : Kryter |
Publisher | : BRILL |
Total Pages | : 687 |
Release | : 2023-12-11 |
Genre | : Language Arts & Disciplines |
ISBN | : 9004653449 |
Contains information on the fundamentals of hearing and sound physics. This book offers a review of research findings and concepts on the effects of noise on people. It focuses on the psychological and physiological affects of noise on hearing and performance. It explains the interrelations of various factors involved in making noise a problem.
Author | : F. H. Schmitz |
Publisher | : |
Total Pages | : 110 |
Release | : 1983 |
Genre | : |
ISBN | : |
The theoretical and experimental status of helicopter impulsive noise is reviewed. The two major source mechanisms of helicopter impulsive noise are addressed: high-speed impulsive noise and blade-vortex interaction impulsive noise. A thorough physical explanation of both generating mechanisms is presented together with model and full-scale measurements of the phenomena. Current theoretical prediction methods are compared with experimental findings of isolated rotor tests. The noise generating mechanisms of high speed impulsive noise are fairly well understood - theory and experiment compare nicely over Mach number ranges typical of today's helicopters. For the case of blade-vortex interaction noise, understanding of noise generating mechanisms and theoretical comparison with experiment are less satisfactory. Several methods for improving theory-experiment are suggested.