The purpose of the evaluation was (1) to measure the acoustic noise environment in the cockpit of the United Kingdom Hawker Siddeley P-1127 V/STOL aircraft that would serve as an acoustic guideline for cockpit noise levels of aircraft being contemplated or under construction, and (2) to determine the acoustic attenuation of various Air Force flight helmets in the inventory or being contemplated for Air Force inventory items. Cockpit sound pressure levels in the P-1127 V/STOL aircraft at various engine rpm settings were measured. The cockpit noise environment at maximum engine rpm was reproduced in the laboratory and used to obtain objective attenuation data for three Air Force flight helmet/liner configurations. Measurement of real-ear attenuation at threshold were also accomplished on the helmet/liner configurations. (Author)
Noise Environs and Helmet Performance for the P-1127 V/STOL Aircraft
1968
29 pages
Report
Keine Angabe
Englisch
Aircraft , Acoustics , Protective Equipment , Airplane noise , Helmets , Vertical take-off planes , Measurement , Acoustic insulation , Cockpits , Environment , Effectiveness , Correlation techniques , Captive tests , Engine noise , Test facilities , Test methods , Audiometry , Kestrel F(GA) Mark-1 aircraft) , Noise levels , XV-6A aircraft , V-6 aircraft
Hawker Siddeley P.1127 V/STOL Strike Reconnaissance Aircraft
SAE Technical Papers | 1964
|Hawker-Siddeley P.1127 V/STOL. Strike reconnaissance aircraft
Engineering Index Backfile | 1964
|Model study of the propagation of sound from V/STOL aircraft into urban environs.
DSpace@MIT | 1973
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