USAF Bioenvironmental Noise Data Handbook. Volume 25. MA-7 Electronic Air Conditioner.
Abstract
The MA-7 Electronic Air Conditioner is an engine-driven air conditioner designed to cool electronic equipment on jet aircraft and missiles during field servicing and preflighting. This report provides measured and extrapolated data defining the bioacoustic environments produced by this unit operating outdoors on a concrete apron at normal rated/loaded conditions. Near-field data are reported for 37 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 10-1600 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1975
- Accession Number
- ADA029599
Entities
People
- Henry Mohlman
- John N. Cole
- Nick A. Farinacci
- Robert G. Powell
- Robert T. England
Organizations
- Air Force Research Laboratory