Effects of Duration and Other Noise Characteristics on the Annoyance Caused by Aircraft-flyover Noise PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Effects of Duration and Other Noise Characteristics on the Annoyance Caused by Aircraft-flyover Noise PDF full book. Access full book title Effects of Duration and Other Noise Characteristics on the Annoyance Caused by Aircraft-flyover Noise by David A. McCurdy. Download full books in PDF and EPUB format.
Author: David A. McCurdy
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
Get Book Here
Book Description
Author: David A. McCurdy
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
Get Book Here
Book Description
Author: David A. McCurdy
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
Get Book Here
Book Description
Author: David A. McCurdy
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
Get Book Here
Book Description
Author: David A. McCurdy
Publisher:
ISBN:
Category : Airplane sounds
Languages : en
Pages : 44
Get Book Here
Book Description
Author: Kelli Francisco Key
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 42
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Get Book Here
Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725566415
Category :
Languages : en
Pages : 36
Get Book Here
Book Description
The effects of aircraft flyover noise on annoyance were compared for face to face conversation, reverie, and television viewing. Eighteen 5 minute sessions, each composed of three flyovers, were presented on each of 2 days to subjects in a simulated living room. Twelve pairs of females and 12 pairs of males were tested, once before and once after work. Flyovers varied in peak noise level from 53 to 83 dB, A weighted. On each day, subjects engaged in 18 sessions, six of conversation, six of television viewing, and six of reverie. The subjects completed subjective ratings of annoyance and acceptability following every session. Annoyance and unacceptability rating scores were significantly higher for the activity of television viewing compared to conversation or reverie. There was no difference between judgments during the latter two activities. No differences were found in the judgments when compared on the basis of "fatigue" (before/after work) or sex of the subject. Willshire, K. F. and Powell, C. A. Langley Research Center NASA-TP-1938, L-14808 RTOP 505-35-13-01...
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Get Book Here
Book Description
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781730842986
Category : Science
Languages : en
Pages : 92
Get Book Here
Book Description
Two experiments were conducted to quantify the annoyance of people to flyover noise of advanced turboprop aircraft with counter rotating propellers. The first experiment examined configurations having an equal number of blades on each rotor and the second experiment examined configurations having an unequal number of blades on each rotor. The objectives were to determine the effects on annoyance of various tonal characteristics, and to compare annoyance to advanced turboprops with annoyance to conventional turboprops and turbofans. A computer was used to synthesize realistic, time-varying simulations of advanced turboprop aircraft takeoff noise. The simulations represented different combinations fundamental frequency and tone-to-broadband noise ratio. Also included in each experiment were recordings of 10 conventional turboprop and turbofan takeoffs. Each noise was presented at three sound pressure levels in an anechoic chamber. In each experiment, 64 subjects judged the annoyance of each noise stimulus. Analyses indicated that annoyance was significantly affected by the interaction of fundamental frequency with tone-to-broadband noise ratio. No significant differences in annoyance between the advanced turboprop aircraft and the conventional turbofans were found. The use of a duration correction and a modified tone correction improved the annoyance prediction for the stimuli. Mccurdy, David A. Langley Research Center...
Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781729393079
Category :
Languages : en
Pages : 44
Get Book Here
Book 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. Mccurdy, David A. Langley Research Center RTOP 535-03-11-03...
