NDLI: Annoyance caused by advanced turboprop aircraft flyover noise: single-rotating propeller configuration

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Annoyance caused by advanced turboprop aircraft flyover noise: single-rotating propeller configuration

Content Provider	NASA Technical Reports Server (NTRS)
Author	McCurdy, David A.
Copyright Year	1988
Description	Two experiments were conducted to quantify the annoyance of people to advanced turboprop (propfan) aircraft flyover noise. The objectives were to: (1) determine the effects on annoyance of various tonal characteristics; and (2) compare annoyance to advanced turboprops with annoyance to conventional turboprops and jets. A computer was used to produce realistic, time-varying simulations of advanced turboprop aircraft takeoff noise. In the first experiment, subjects judged the annoyance of 45 advanced turboprop noises in which the tonal content was systematically varied to represent the factorial combinations of five fundamental frequencies, three frequency envelope shapes, and three tone-to-broadband noise ratios. Each noise was presented at three sound levels. In the second experiment, 18 advanced turboprop takeoffs, 5 conventional turboprop takeoffs, and 5 conventional jet takeoffs were presented at three sound pressure levels to subjects. Analysis indicated that frequency envelope shape did not significantly affect annoyance. The interaction of fundamental frequency with tone-to-broadband noise ratio did have a large and complex effect on annoyance. The advanced turboprop stimuli were slightly less annoying than the conventional stimuli.
File Size	10187297
Page Count	43
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19880008057
Archival Resource Key	ark:/13960/t7xm36n4c
Language	English
Publisher Date	1988-03-01
Access Restriction	Open
Subject Keyword	Acoustics Psychoacoustics Turboprop Aircraft Jet Aircraft Noise Engine Noise Supersonic Flight Computerized Simulation Noise Tolerance Takeoff Human Tolerances Propeller Fans Noise Intensity Prop-fan Technology Pitch Tolerances Physiology Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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