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Magnitude-dependence of equivalent comfort contours for fore-and-aft, lateral and vertical hand-transmitted vibration

Magnitude-dependence of equivalent comfort contours for fore-and-aft, lateral and vertical hand-transmitted vibration
Magnitude-dependence of equivalent comfort contours for fore-and-aft, lateral and vertical hand-transmitted vibration
The strength of sensation produced by vibration applied to the glabrous skin of the hand varies with the magnitude, frequency, and direction of the vibration and the contact conditions. With groups of 12 subjects gripping a cylindrical handle, this experimental study investigated perception thresholds (in the frequency range 8–315 Hz) and the strength of sensation caused by each of the three axes of hand-transmitted vibration (in the frequency range 8–400 Hz) at vibration magnitudes from threshold up to levels associated with discomfort and injury. In all three axes, acceleration thresholds for the perception of vibration showed a U-shaped frequency-dependence with greatest sensitivity around 80–160 Hz.

At supra-threshold levels, the frequency-dependence of the equivalent comfort contours in each of the three axes was highly dependent on vibration magnitude. With increasing vibration magnitude, equivalent sensation approximated towards constant velocity, whereas with decreasing magnitudes the sensation became similar to the absolute perception threshold. This magnitude-dependence of equivalent comfort contours suggests differential mediation of psychophysical channels responsible for perception at different vibration magnitudes. The results imply that no single linear frequency weighting can provide accurate predictions of subjective judgments of discomfort caused by hand-transmitted vibration.
0022-460X
633-648
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Morioka, Miyuki
8eb26aca-8773-4e45-8737-61c2438d30d9
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Morioka, Miyuki and Griffin, Michael J. (2006) Magnitude-dependence of equivalent comfort contours for fore-and-aft, lateral and vertical hand-transmitted vibration. Journal of Sound and Vibration, 295 (3-5), 633-648. (doi:10.1016/j.jsv.2006.01.029).

Record type: Article

Abstract

The strength of sensation produced by vibration applied to the glabrous skin of the hand varies with the magnitude, frequency, and direction of the vibration and the contact conditions. With groups of 12 subjects gripping a cylindrical handle, this experimental study investigated perception thresholds (in the frequency range 8–315 Hz) and the strength of sensation caused by each of the three axes of hand-transmitted vibration (in the frequency range 8–400 Hz) at vibration magnitudes from threshold up to levels associated with discomfort and injury. In all three axes, acceleration thresholds for the perception of vibration showed a U-shaped frequency-dependence with greatest sensitivity around 80–160 Hz.

At supra-threshold levels, the frequency-dependence of the equivalent comfort contours in each of the three axes was highly dependent on vibration magnitude. With increasing vibration magnitude, equivalent sensation approximated towards constant velocity, whereas with decreasing magnitudes the sensation became similar to the absolute perception threshold. This magnitude-dependence of equivalent comfort contours suggests differential mediation of psychophysical channels responsible for perception at different vibration magnitudes. The results imply that no single linear frequency weighting can provide accurate predictions of subjective judgments of discomfort caused by hand-transmitted vibration.

Text
14562 Morioka+Griffin 2006 Comfort_contours_for_hand_vibration - Accepted Manuscript
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Published date: 2006
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 28594
URI: http://eprints.soton.ac.uk/id/eprint/28594
ISSN: 0022-460X
PURE UUID: 1de0a26e-629e-4691-beaa-51420d94a67c
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

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Date deposited: 02 May 2006
Last modified: 03 Dec 2019 02:07

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Author: Miyuki Morioka

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