Accession Number : ADA289698

Title :   Updated Computer Programs for Predicting Single Event Aircraft Noise Data for Specific Engine Power and Meteorological Condition.

Descriptive Note : Final rept. 1 Oct 87-1 Apr 93,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Mohlman, Henry T.

PDF Url : ADA289698

Report Date : 07 APR 1993

Pagination or Media Count : 113

Abstract : This report documents OMEGA 10.8 program and OMEGA 11.3 program. These programs were developed to prepare flight and ground run-up noise data for input to NOISEMAP, the Air Force community noise exposure prediction program. All subroutines are documented at a level useful to a programmer working with the code or a reader interested in a general overview of a specific subroutine. The OMEGA 10 program inputs reference flyover datasets from the NOISEFILE database for a specific aircraft, extrapolates the reference sound pressure level (SPL) data from the reference minimum slant range (1000 feet to 22 profile distances (200 to 25000), computes the single event measures at these distances, and then applies a set of rules to extrapolate or interpolate these single event versus distance data to produce distance profiles for single event noise measures at the requested power setting, airspeed, temperature and relative humidity The OMEGA 11 program inputs reference ground run-up datasets from the NOISEFILE database for a specific aircraft. extrapolates these SPL spectra from the reference distance (250 feet) to each of the 22 profile distance, computes the single event measures for each spectrum at each distance at the requested temperature, relative humidity, barometric pressure and aircraft engine power setting. (AN)

Descriptors :   *COMPUTER PROGRAMS, *SUBROUTINES, *AIRCRAFT NOISE, DATA BASES, DATA PROCESSING, PREDICTIONS, COMPARISON, INPUT OUTPUT PROCESSING, ENVIRONMENTAL IMPACT, FORTRAN, PROFILES, INTERPOLATION, AIRSPEED, ACOUSTIC ATTENUATION, BAROMETRIC PRESSURE, RANGE(DISTANCE), SOUND PRESSURE, NOISE POLLUTION, SLANT RANGE, HUMIDITY, EXTRAPOLATION, AIRCRAFT ENGINE NOISE.

Subject Categories : Computer Programming and Software
      Acoustics
      Military Aircraft Operations
      Noise Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE