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Predicting the effects of vibration frequency and axis, and seating conditions on the reading of numeric displays

Predicting the effects of vibration frequency and axis, and seating conditions on the reading of numeric displays
Predicting the effects of vibration frequency and axis, and seating conditions on the reading of numeric displays

Ten subjects performed a numeral reading task under five levels of sinusoidal whole-body vibralion at various frequencies in each of the three translational axes. In the z-axis the vibration frequencies were spaced at half octaves between 2-8 and 63 Hz, and in the x and y-axes at half octaves between 2-8 and 32 Hz. All of the vibration conditions were presented with two sealing conditions: hard flat seat with fixed footrcst and a simulated helicopter seat with moving footrest. With both seats the effect of vibration level on reading accuracy was found to be significant at all but the highest frequencies of z-axis vibration. It was also significant for x-axis vibration with the simulated helicopter seat, but not for x-axis vibralion with the flat seat or for y-axis vibration with either seat. Results are presented in the form of equal performance contours.Measures of translational and rotational head motion were also made for each vibration axis and seat. Very little vibration was found to be transmitted to the head during x-axis vibration with the flat seat or y-axis vibration with either seat, in agreement with the small effect of vibration on reading performance in these cases. These results were combined with performance data to investigate the feasibilily of predicting performance decrements directly from head motions.

0014-0139
485-501
Lewis, Christopher H.
6a953646-70d2-4785-9f6d-ee6f90b16cd5
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Lewis, Christopher H.
6a953646-70d2-4785-9f6d-ee6f90b16cd5
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Lewis, Christopher H. and Griffin, Michael J. (1980) Predicting the effects of vibration frequency and axis, and seating conditions on the reading of numeric displays. Ergonomics, 23 (5), 485-501. (doi:10.1080/00140138008924762).

Record type: Article

Abstract

Ten subjects performed a numeral reading task under five levels of sinusoidal whole-body vibralion at various frequencies in each of the three translational axes. In the z-axis the vibration frequencies were spaced at half octaves between 2-8 and 63 Hz, and in the x and y-axes at half octaves between 2-8 and 32 Hz. All of the vibration conditions were presented with two sealing conditions: hard flat seat with fixed footrcst and a simulated helicopter seat with moving footrest. With both seats the effect of vibration level on reading accuracy was found to be significant at all but the highest frequencies of z-axis vibration. It was also significant for x-axis vibration with the simulated helicopter seat, but not for x-axis vibralion with the flat seat or for y-axis vibration with either seat. Results are presented in the form of equal performance contours.Measures of translational and rotational head motion were also made for each vibration axis and seat. Very little vibration was found to be transmitted to the head during x-axis vibration with the flat seat or y-axis vibration with either seat, in agreement with the small effect of vibration on reading performance in these cases. These results were combined with performance data to investigate the feasibilily of predicting performance decrements directly from head motions.

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More information

Published date: 1980
Organisations: University of Southampton, Human Factors Research Unit

Identifiers

Local EPrints ID: 410863
URI: http://eprints.soton.ac.uk/id/eprint/410863
ISSN: 0014-0139
PURE UUID: 532d4f59-cdac-4e6b-a362-92e5b07f5d3d
ORCID for Michael J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

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Date deposited: 09 Jun 2017 09:47
Last modified: 14 Mar 2019 01:56

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