Accession Number : ADA139901

Title :   A Comparison of Measured Take-Off and Flyover Sound Levels for Several General Aviation Propeller-Driven Aircraft.

Descriptive Note : Final rept.,

Corporate Author : BOLT BERANEK AND NEWMAN INC CANOGA PARK CA

Personal Author(s) : Wilby,J F ; Wilby,E G

PDF Url : ADA139901

Report Date : Feb 1984

Pagination or Media Count : 137

Abstract : The Federal Aviation Administration is currently reviewing noise certification procedures for general aviation propeller-driven aircraft. As part of this review noise measurements were made for take-offs and flyovers of several propeller-driven aircraft at Dulles International Airport. The data from the tests were analyzed by FAA in terms of the A-weighted sound level. This analysis indicated that there were general differences between take-off and flyover sound levels. The intent of this report is to present a review of the data without going into detailed analyses. Possible reasons for differences between take-off and flyover sound levels are explored and certain conclusions drawn. Recommendations are then made for future work in order to provide a more-detailed understanding of the physical phenomena involved.

Descriptors :   *Aircraft noise, Civil aviation, Aircraft, Aerial propellers, Takeoff, Flight testing, Amplitude, Spectra

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE