USAF Bioenvironmental Noise Data Handbook. Volume 104. A/M32A-60A Generator Set and A/M32C-10 Air Conditioner, Combined Unit Operation.

摘要

The A/M32A-60A Generator Set is a gas turbine engine driven source of electrical power with pneumatic capability. The A/M32C-10 Air Conditioner is a pneumatic-driven air conditioner designed to provide conditioned air to the aircraft's interior during ground servicing. This report provides measured and extrapolated data defining the bioacoustic environments produced by these two units simultaneously operated as a unit outdoors on a concrete apron at normal rated/loaded conditions. Near-field data are reported for 72 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. Far-field data measured at 36 locations are normalized to standard meteorological conditions and extrapolated from 20-3000 meters to derive sets of equal-value contours for these same seven acoustic measures as functions of angle and distance from the source. 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)