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Magnitude dependence of equivalent comfort contours for fore-and-aft, lateral and vertical whole-body vibration

Magnitude dependence of equivalent comfort contours for fore-and-aft, lateral and vertical whole-body vibration
Magnitude dependence of equivalent comfort contours for fore-and-aft, lateral and vertical whole-body vibration
It is currently assumed that the same frequency weightings, derived from studies of vibration discomfort, can be used to evaluate the severity of vibration at all vibration magnitudes from the threshold of vibration perception to the vibration magnitudes associated with risks to health. This experimental study determined equivalent comfort contours for the whole-body vibration of seated subjects over the frequency range 2–315 Hz in each of the three orthogonal axes (fore-and-aft, lateral and vertical). The contours were determined at vibration magnitudes from the threshold of perception to levels associated with severe discomfort and risks to health.
At frequencies greater than 10 Hz, thresholds for the perception of vertical vibration were lower than thresholds for fore-and-aft and lateral vibration. At frequencies less than 4 Hz, thresholds for vertical vibration were higher than thresholds for fore-and-aft and lateral vibration. The rate of growth of sensation with increasing vibration magnitude was highly dependent on the frequency and axis of vibration. Consequently, the shapes of the equivalent comfort contours depended on vibration magnitude. At medium and high vibration magnitudes, the equivalent comfort contours were reasonably consistent with the frequency weightings for vibration discomfort in current standards (i.e. Wb and Wd). At low vibration magnitudes, the contours indicate that relative to lower frequencies the standards underestimate sensitivity at frequencies greater than about 30 Hz. The results imply that no single linear frequency weighting can provide accurate predictions of discomfort caused by a wide range of magnitudes of whole-body vibration
0022-460X
755-772
Morioka, M.
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Bovenzi, Massimo
fc8fbd59-6c3f-46f1-b8f5-2a00b759857c
Morioka, M.
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, M.J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Bovenzi, Massimo
fc8fbd59-6c3f-46f1-b8f5-2a00b759857c

Morioka, M. and Griffin, M.J. , Griffin, Michael J. and Bovenzi, Massimo (eds.) (2006) Magnitude dependence of equivalent comfort contours for fore-and-aft, lateral and vertical whole-body vibration. Journal of Sound and Vibration, 298 (3), 755-772. (doi:10.1016/j.jsv.2006.06.011).

Record type: Article

Abstract

It is currently assumed that the same frequency weightings, derived from studies of vibration discomfort, can be used to evaluate the severity of vibration at all vibration magnitudes from the threshold of vibration perception to the vibration magnitudes associated with risks to health. This experimental study determined equivalent comfort contours for the whole-body vibration of seated subjects over the frequency range 2–315 Hz in each of the three orthogonal axes (fore-and-aft, lateral and vertical). The contours were determined at vibration magnitudes from the threshold of perception to levels associated with severe discomfort and risks to health.
At frequencies greater than 10 Hz, thresholds for the perception of vertical vibration were lower than thresholds for fore-and-aft and lateral vibration. At frequencies less than 4 Hz, thresholds for vertical vibration were higher than thresholds for fore-and-aft and lateral vibration. The rate of growth of sensation with increasing vibration magnitude was highly dependent on the frequency and axis of vibration. Consequently, the shapes of the equivalent comfort contours depended on vibration magnitude. At medium and high vibration magnitudes, the equivalent comfort contours were reasonably consistent with the frequency weightings for vibration discomfort in current standards (i.e. Wb and Wd). At low vibration magnitudes, the contours indicate that relative to lower frequencies the standards underestimate sensitivity at frequencies greater than about 30 Hz. The results imply that no single linear frequency weighting can provide accurate predictions of discomfort caused by a wide range of magnitudes of whole-body vibration

Text
14557 MM-MJG 2000 Magnitude-dependence of equivalent comfort contours for WBV - AUTHOR ACCEPTED MANUSCRIPT - Accepted Manuscript
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More information

Published date: December 2006
Additional Information: Special issue on the Third International Conference on Whole-body Vibration Injuries
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 39222
URI: http://eprints.soton.ac.uk/id/eprint/39222
ISSN: 0022-460X
PURE UUID: 0888f6b3-ed7f-4844-b46e-7caabaeaec3e
ORCID for M.J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

Catalogue record

Date deposited: 23 Jun 2006
Last modified: 03 Dec 2019 02:07

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