readability task performance
equivalent acceleration of vibration
mobile environment.


This paper presents a study in which the effect of noise and vibration on the task performance in a mobile driving environment is experimentally investigated. A readability kind of task, where a reading material was presented to the operators on a laptop screen was considered and the operators performed the task in a sitting posture without their back supported with the backrest of the seat. The task performance was measured in terms of mean number of characters read per minute by the operators, which served as data for statistical analysis. Results of the study showed that noise and vibration were statistically significant. The interaction between gender and vibration was also found to be significant. The presence of noise and vibration in a mobile environment decreased the operators’ task performance. The results of the simple main effect analysis indicated that the gender was statistically significant for the last two levels of vibration. However the equivalent acceleration of vibration was found statistically significant for males and females. The findings are in line with previous researches that showed negative significant effect of noise and vibration on operators’ task performance.





Ishitake, T., Ando, H., Miyazaki, Y., and Matoba, F. (1998), Changes of visual performance induced by exposure to whole-body vibration. Kurume Med J., 45(1), pp. 59-62. 2. McLeod, R.W. and Griffin, M.J. (1989), A review of the effects of transactional whole-body vibration on continuous manual control performance. J. of Sound and Vibration, 133, pp. 55-115.

Cho, Z.H., Chung, S.C., Lim, and Wong, E.K. (1998), Effects of the acoustic noise of the gradient systems on MRI: a study on auditory, motor, and visual cortices. Magn Reson Med, 39, pp. 331-335.

Smith, A.P. (1991), Noise and aspects of attention. Brit. J. of Psychology, 82, pp. 313-324.

Harris, C.S. and Shoenberger, R.W. (1980), Combined effects of broadband noise and complex waveform vibration on cognitive performance. Aviation Space and Environmental Medicine, 51(1), pp. 1-5.

Albery, W.B. (1989), The effect of sustained acceleration and noise on workload in human operators. Aviation Space and Environmental Medicine, 60(10), pp. 943-948.

Zimmermann, C.L. and Cook, T.M. (1997), Effects of vibration frequency and postural changes on human responses to seated whole-body vibration exposure. Int. Arch Occup. Environ. Health, 69(3), pp. 165-79.

Liu, J.Z., Kubo, M., Aoki, H., Liu, N., Kou, P.H., and Suzuki, T. (1995), A study on the difference of human sensation evaluation to whole-body vibration in sitting and lying postures. Appl. Human Sci., 14(5), pp. 219-26.

Hinz, B., Seidel, H., Menzel, G., and Bluthner, R. (2002), Effects related to random whole body vibration and posture on a suspended seat with and without backrest. J. of Sound and Vibration, 253(1), pp. 265-282.

Karlqvist, L., Wigaeus Tornqvist, E., Hagberg, M., Hagman, M., and Toomingas, A. (2002), Self-reported working conditions of VDU operators and associations with musculoskeletal symptoms: A cross-sectional study focusing on gender differences. International J. of Industrial Ergonomics, 30(4-5), pp. 277-294.

International Organization for Standardization (ISO). Mechanical vibration and shock evaluation of human exposure to whole-body vibration-part1: general requirements (Standard No. ISO;2631-1:1997). Geneva, Switzerland :ISO; 1997.

William Taylor, Brain Melloy, Pallavi Dharwada, Anand Gramopdhye, and Joe Toler (2004), The effect of static multiple sources of noise on the visual search component of human inspection. International J. of Industrial Ergonomics, (3), pp. 195-207.

Bengtsson, K., Persson Waye, and Kjelberg, A. (2004), Evaluations of effects due to low frequency noise in a low demanding work situation. J. of Sound and Vibration, 278(1-2), pp. 83-99.

Pawlaczyk-Luszczynska, M., Dudarewicz, A., Waszkowska, M., and Sliwinska-Kowalska, M. (2003), Assessment of annoyance from low frequency and broadband noises. Int. J. Occup. Med. Environ. Health, 16(4), pp. 337-43.

Pawlaczyk-Luszczynska, M., Dudarewicz, A., Waszkowska, M., Szmczak, W., Kamedula, M., and Sliwinska-Kowalska, M. (2004), The effect of low frequency noise on human mental performance. Med. Pr., 55(1), pp. 63-74.

Levine, M.E. and Stern, R.M. (2002), Spatial task performance, sex differences, and motion sickness susceptibility. Percept. Mot. Skills, 95(2), pp. 425-31.

Guedry, F.E.Jr., Benson, A.J., and Moore, H.J. (1982), Influence of a visual display and frequency of whole-body angular oscillation on incidence of motion sickness. Aviation Space and Environmental Medicine, 53(6), pp. 564-569.

Sherwood, N. and Griffin, M.J. (1990), Effects of whole-body vibration on short-term memory. Aviation Space and Environmental Medicine, 61(12), pp. 1092-1097.

Kato, K. and Hanai, T. (1998), The effect of backrest angles on discomfort caused by foreand-aft back vibration. Ind. Health, 36(2), pp. 107-111.

Village, J., Morrison, J.B., and Leong, D.K. (1989), Whole body vibration in underground load haul-dump vehicles. Ergonomics, 32(10), pp. 1167-1183.

Well, M.J. and Griffin M.J. (1984), Benefits of helmet-mounted display image stablisation under whole-body vibration. Aviation Space and Environmental Medicine, 55(1), pp. 1318.

Griffin, M.J. and Hayward, R.A. (1994), Effects of horizontal whole-body vibration on reading. Applied Ergonomics, 25(3), pp. 165-169.

Corbridge, C. and Griffin, M.J. (1991), Effects of vertical vibration on passenger activities: Writing and Drinking. Ergonomics, 1991, 34(10), pp. 1313-1332.


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