Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"helicopter noise"”.
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Helicopter noise experiments in an urban environment.
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1973
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A compressible, high frequency numerical model of helicopter noise due to blade/vortex interaction
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1980
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The effects of human disturbance on the seabirds and seals at sub-Antarctic Marion Island
… be affected by logistic disturbance (especially helicopter noise), incidental pedestrian disturbance and research disturbance. The responses of wandering albatrosses (Diomedea exulans) and king penguins (Aptenodytes patagonicus) were investigated through standardised pedestrian approaches. …
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Effects of noise and workload on performance with two object displays vs. a separated display
… 2 (14 subjects), it was imposed by 88 dB helicopter noise. Results indicated that information integration was best supported by the rectangle display at higher levels of workload. Both the color bar and the bargraph display were associated with poor performance on the integration task, but …
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Turbulent flowfield downstream of a perpendicular airfoil--vortex interaction
… airfoil--vortex interaction commonly occurs in helicopter rotor flows. The experiments presented here thus provide useful information for the prediction of helicopter noise, particularly BWI noise. Three-component velocity and turbulence measurements were made in unprecedented detail using a …
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An Examination of Headset, Hearing Sensitivity, Flight Workload, and Communication Signal Quality on Black Hawk Helicopter Simulator Pilot Performance
… Army rotary-wing aviators are exposed is intense noise generated from the aircraft. The potential for permanent hearing loss and difficulty communicating in helicopter noise is well known; an appropriate way to evaluate a hearing-impaired pilot's safety risk due to hearing loss is not as well …