THe HH-53C is a USAF heavy assault transport helicopter used to search, locate, and recover combat aircrew members, personnel, and/or vital aerospace hardware. This report provides measured data defining the bioacoustic environments at flight crew locations inside this helicopter during normal flight operations. Data are reported for 15 locations in a wide variety of physical and psychoacoustic measures: overall and band sound pressure levels, C-weighted and A-weighted sound levels, preferred speech interference level, perceived noise level, and limiting times for total daily exposure of personnel with and without standard Air Force ear protectors. Refer to VOlume 1 of this handbook, USAF Bioenvironmental Noise Data Handbook, Vol 1: Organization, Content and Application, AMRL-TR-75-50(1) 1975, for discussion of the objective and design of the handbook, the types of data presented, measurement procedures, instrumentation, data processing, definitions of quantities, symbols, equations, applications, limitations, etc. (Author)
USAF Bioenvironmental Noise Data Handbook: Volume 51. HH-53C In-Flight Crew Noise
1975
15 pages
Report
Keine Angabe
Englisch
Aircraft , Stress Physiology , Noise Pollution & Control , Noise pollution , Bioacoustics , Aircraft noise , Helicopters , Flight crews , Noise(Sound) , Handbooks , Sound pressure , Inflight , Amphibious aircraft , Search and rescue , Speech , Interference , Bioenvironmental noise , HH-53C aircraft , H-53 aircraft , Speech interference