Accession Number:

ADA116363

Title:

Helicopter Noise Definition Report UH-60A, S-76, A-109, 206-L

Descriptive Note:

Final rept.

Corporate Author:

FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF ENVIRONMENT AND ENERGY

Report Date:

1981-12-01

Pagination or Media Count:

682.0

Abstract:

This document presents noise data for the Sikorsky UH-60A Blackhawk, the Sikorsky S-76 Spirit, the Agusta A-109 and the Bell 206-L. The acoustical data are accompanied by phototheodolite tracking data, cockpit instrument panel photo data, and meteorological data acquired from radiosonde balloons. Acoustical metrics include both noise certification metrics EPNL, PNLT, PNL as well as communityairport noise assessment metrics SEL, dBA. Noise data have been acquired systematically to identify variations in level with variations in helicopter airspeed and altitude. Data contained in this report provide essential information for development of helicopter noise exposure contours as well as further evaluation of ICAO helicopter noise certification standards. Accordingly, this information will be of interest to helicopter manufacturers, airport planning consultants, acoustical engineers and airport managers. This report serves as a noise definition document establishing baseline acoustical characteristics of the test helicopters.

Subject Categories:

  • Lighter-than-air Aircraft
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE