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- W23821471 abstract "Abstract : levels in the NUH-60 (Black Hawk) Aeromed Flight Simulator located at the U.S. Army Aeromedical Research Laboratory were measured. levels were adjusted using a nine-position control set by the simulator operator. The simulator operator's manual stated that noise levels should not exceed 85 dBA. Measurements were made at five noise level settings at the pilot and copilot stations. Results showed that the A-weighted sound level of the flight simulator at Level Setting 1 was 81.8 dBA while levels at Settings 3, 5, %, and 9 exceeded the 85 dBA noise exposure limit. In addition, the octave-band frequency spectrum of the simulator noise at Setting 9 differed appreciably from the spectrum of an actual UH-6OA aircraft. These differences were particularly large (exceeding 20 dB) in the upper frequencies in the speech range and should be considered before similar research involving communication or speech intelligibility is conducted. It is noted that noise hazard signs are posted appropriately at the entrance to the USAARL NUH-60 flight simulator in accordance with MIL-STD-1474D Noise Limits. Hearing protective devices should be used in the simulator when operated at noise levels above the lowest noise level setting." @default.
- W23821471 created "2016-06-24" @default.
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- W23821471 date "2000-08-01" @default.
- W23821471 modified "2023-09-24" @default.
- W23821471 title "Noise Levels in the USAARL NUH-60 (Black Hawk) Aeromed Flight Simulator" @default.
- W23821471 doi "https://doi.org/10.21236/ada383436" @default.
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