Cumulative Annoyance Due to Multiple Aircraft Flyover with Differing Peak Noise Levels PDF Download
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781724276865
Category :
Languages : en
Pages : 30
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Book Description
A laboratory study in which 160 subjects judged the annoyance of 30 minute sessions of aircraft noise is described. Each session contained nine flyovers consisting of various combinations of three takeoff recordings of Boeing 727. The subjects were asked to judge their annoyance in the simulated living room environment of the laboratory and also to assess how annoyed they would be if they heard the noise in their home during the day, evening, and night periods. The standard deviation of the sound level did not improve the predictive ability of L sub eq (equivalent continuous sound level) which performed as well or better than other noise measured. Differences were found between the projected home responses for the day, evening, and nighttime periods. Time of day penalties derived from these results showed reasonable agreement with those currently used in community noise indices. Shepherd, K. P. Unspecified Center NASA-CR-3417 NAS1-14970; RTOP 505-35-13-01
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781724276865
Category :
Languages : en
Pages : 30
Get Book Here
Book Description
A laboratory study in which 160 subjects judged the annoyance of 30 minute sessions of aircraft noise is described. Each session contained nine flyovers consisting of various combinations of three takeoff recordings of Boeing 727. The subjects were asked to judge their annoyance in the simulated living room environment of the laboratory and also to assess how annoyed they would be if they heard the noise in their home during the day, evening, and night periods. The standard deviation of the sound level did not improve the predictive ability of L sub eq (equivalent continuous sound level) which performed as well or better than other noise measured. Differences were found between the projected home responses for the day, evening, and nighttime periods. Time of day penalties derived from these results showed reasonable agreement with those currently used in community noise indices. Shepherd, K. P. Unspecified Center NASA-CR-3417 NAS1-14970; RTOP 505-35-13-01
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Book Description
Author: Kevin P. Shepherd
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 36
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Book Description
A laboratory study in which 160 subjects judged the annoyance of 30 minute sessions of aircraft noise is described. Each session contained nine flyovers consisting of various combinations of three takeoff recordings of Boeing 727. The subjects were asked to judge their annoyance in the simulated living room environment of the laboratory and also to assess how annoyed they would be if they heard the noise in their home during the day, evening, and night periods. The standard deviation of the sound level did not improve the predictive ability of L sub eq (equivalent continuous sound level) which performed as well or better than other noise measured. Differences were found between the projected home responses for the day, evening, and nighttime periods. Time of day penalties derived from these results showed reasonable agreement with those currently used in community noise indices.
Author: C. A. Powell
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1370
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Kelli Francisco Key
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 42
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Book Description
Author: Clemans A. Powell
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 40
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 52
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Book Description
Author: Clemans A. Powell
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 46
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725566415
Category :
Languages : en
Pages : 36
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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...
