USAF Bioenvironmental Noise Data Handbook. Volume 97. T-39 Aircraft, Near and Far-Field Noise.
Abstract
The USAF T-39 is a pilot proficiency trainer aircraft powered by two J60-P-3A turbojet engines. This report provides measured and extrapolated data defining the bioacoustic environments produced by this aircraft operating on a taxiway for four engine conditions. Near-field data are reported for six 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 19 locations are normalized to standard meteorological conditions and extrapolated from 75-8000 meters to derive sets of equal-value contours for these same seven acoustic measures as functions of angle and distances 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
- May 01, 1977
- Accession Number
- ADA048937
Entities
People
- Nick A. Farinacci
- Robert G. Powell
Organizations
- Air Force Research Laboratory