NDLI: Influence of chair vibrations on indoor sonic boom annoyance

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Influence of chair vibrations on indoor sonic boom annoyance

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rathsam, Jonathan Klos, Jacob Loubeau, Alexandra
Copyright Year	2015
Description	One goal of NASAâs Commercial Supersonic Technology Project is to identify candidate noise metrics suitable for regulating quiet sonic boom aircraft. A suitable metric must consider the short duration and pronounced low frequency content of sonic booms. For indoor listeners, rattle and creaking sounds and floor and chair vibrations may also be important. The current study examined the effect of such vibrations on the annoyance of test subjects seated indoors. The study involved two chairs exposed to nearly identical acoustic levels: one placed directly on the floor, and the other isolated from floor vibrations by pneumatic elastomeric mounts. All subjects experienced both chairs, sitting in one chair for the first half of the experiment and the other chair for the remaining half. Each half of the experiment consisted of 80 impulsive noises played at the exterior of the sonic boom simulator. When all annoyance ratings were analyzed together there appeared to be no difference in mean annoyance with isolation condition. When the apparent effect of transfer bias was removed, a subtle but measurable effect of vibration on annoyance was identified.
File Size	243046
Page Count	4
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20160006285
Archival Resource Key	ark:/13960/t7kq3113p
Language	English
Publisher Date	2015-06-29
Access Restriction	Open
Subject Keyword	Acoustics Vibration Bias Isolation Vibration Effects Sonic Booms Simulators Low Frequencies Vibration Tests Floors Ratings Seats Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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