Subjective Assessment of Simulated Helicopter Blade-noise PDF Download
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Author: Ben William Lawton
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
Author: Ben William Lawton
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
Author: Ben William Lawton
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 0
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Book Description
Author: Ben William Lawton
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 60
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 432
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 72
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Author: L. C. Sutherland
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 164
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Book Description
Author: Bryan Edwards
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 58
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Book Description
Psychoacoustic testing of simulated helicopter main rotor noise is described, and the subjective results are presented. The objective of these tests was to evaluate the potential acoustic benefits of main rotors with modulated (uneven) blade spacing. Sound simulations were prepared for six main rotor configurations. A baseline 4-blade main rotor with regular blade spacing was based on the Bell Model 427 helicopter. A 5-blade main rotor with regular spacing was designed to approximate the performance of the 427, but at reduced tipspeed. Four modulated rotors - one with "optimum" spacing and three alternate configurations - were derived from the 5 bladed regular spacing rotor. The sounds were played to 2 subjects at a time, with care being taken in the speaker selection and placement to ensure that the sounds were identical for each subject.
Author: Clemans A. Powell
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 64
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Author: John W. Leverton
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 66
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 52
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