Subjective response of standing persons exposed to fore-aft,lateral and vertical whole-body vibration |
| |
| Affiliation: | 1. Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3J 1Z1, Canada;2. Center of Ultra-precision Optoelectronic Instrument, Harbin Institute of Technology, Harbin 150080, China;1. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, China;2. National Engineering Laboratory for Speech and Language Information Processing, Hefei, Anhui 230027, China;1. School of Mathematical Science, Harbin Normal University, Harbin 150001, PR China;2. College of Science, Harbin Engineering University, Harbin 150001, PR China;1. Universidade Federal do Paraná, Departamento de Zoologia, Curitiba, PR, Brazil;2. Universidade Federal do Paraná, Departamento de Farmacologia, Curitiba, PR, Brazil;1. Acoustic Research Laboratory, Tropical Marine Science Institute, National University of Singapore, 119227 Singapore;2. Department of Electrical and Computer Engineering, Block E4, 4 Engineering Drive 3, 117583 Singapore |
| |
| Abstract: | The aims of this study were to propose multiply scale factors for evaluation of discomfort of standing persons and to investigate whether there exist differences between multiplying factors used for evaluation of discomfort of standing persons and those of seated persons exposed to WBV. Twelve male subjects were exposed to twenty-seven stimuli that comprise three acceleration magnitudes (0.2, 0.4, and 0.8 m/s2 r.m.s.) along fore-aft (x), lateral (y) or vertical (z) direction. The subjects with seated or standing posture on the platform of the vibration test rig rated the subjective discomfort for each stimulus that has frequency contents ranging from 1.0 Hz to 20 Hz with a constant power spectrum density. The order of presentation of the test stimuli was fully randomized and each stimulus was repeated three times. The subjective scale for discomfort was calculated by using the category judgment method. The best combinations of multiplying factors were determined by calculating correlation coefficients of regression curves in-between subjective ratings and vibration magnitudes. In all the directions, body posture significantly influenced on subjective discomfort scales. Particularly in the fore-aft and lateral direction, the upper limit of all the categories for the standing posture resulted in higher vibration acceleration magnitudes than those for the seated posture. In contrast, in the vertical direction, only the upper limit of category “1: Not uncomfortable” for standing posture was observed to be higher than that for seated posture. The best agreement for ISO-weighted vibration acceleration occurred at x factor of 1.8 and y factor of 1.8 in the standing posture and x factor of 2.8 and y factor of 1.8 in the seated posture. The results suggest that seated people respond more sensitively and severely in perception of discomfort to fore-aft and lateral vibration than standing people do while standing people respond more sensitively and severely to vertical vibration than seated people do. Thus the effects of body postures on multiplying factors should be considered in evaluation of discomfort caused by whole-body vibration.Relevance to industryThis study reports differences in subjective response of standing persons to fore-aft, lateral and vertical whole-body vibration. The results obtained in this study propose the fundamental data on the sensitivity to whole-body vibration exposed with standing posture. |
| |
| Keywords: | Whole-body vibration Discomfort Standing posture Seated posture Psychophysics |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
