Noise Measurement Flight Test: Data/Analyses Bell 222 Twin Jet Helicopter
Abstract
This report contains documentary sections describing the acoustical characteristics of the subject helicopter and provides analyses and discussions addressing topics ranging from acoustical propagation to environmental impact of helicopter noise. The report is the first in a series of seven documenting the FAA helicopter noise measurement program conducted at Dulles International Airport during the summer of 1983. The Bell 222 test program involved the acquisition of detailed acoustical, position and meteorological data. This test program was designed to address a series of objectives including: (1) evaluation of 'Fly Neighborly' (minimum noise) operating procedures for helicopters, (2) acquisition of acoustical data for use in heliport environmental impact, (3) documentation of directivity characteristics for static operation of helicopters, (4) establishment of ground-to-ground and air-to-ground acoustical propagation relationships for helicopters, (5) determination of noise event duration influences on energy dose acoustical metrics, (6) examination of the differences between noise measured by surface mounted microphone and a microphone mounted at a height of four feet (1.2 meters), and (7) documentation of noise levels acquired using international helicopter noise certification test procedures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1984
- Accession Number
- ADA139906
Entities
People
- E. J. Rickley
- J. S. Newman
- S. A. Daboin
- T. L. Bland
Organizations
- Federal Aviation Administration