Accession Number:

ADA029594

Title:

USAF Bioenvironmental Noise Data Handbook. Volume 20. MJ-2A Test Stand, Aircraft Hydraulic System - Gasoline Engine Driven.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO

Report Date:

1975-08-01

Pagination or Media Count:

54.0

Abstract:

The MJ-2A Test Stand is a gasoline engine-driven source of filtered hydraulic pressure designed to test hydraulic systems and individual hydraulic units and to pressurize aircraft hydraulic reservoirs. This report provides measured and extrapolated data defining the bioacoustic environments produced by this unit operating outdoors on a concrete apron at normal ratedloaded 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-75-501 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

Subject Categories:

  • Terminal Flight Facilities
  • Civil Engineering
  • Test Facilities, Equipment and Methods
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE