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Threshold of Perception for Whole-Body Seated Vibration

机译：全身坐姿振动的感知阈值

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摘要

A study was done to measure seated vibration perception thresholds in the vertical, lateral, and longitudinal directions at 2, 4, 8, 16, 32, 64, and 96 Hz. 4 male and 2 female subjects were tested. The testing was done on the Ford Vehicle Vibration Simulator (VVS), using a rigid seat with a backrest. A 3-down, 1-up adaptive Levitt algorithm was employed. Bandlimited noise prompting was done over headphones, with subjects eyes closed during stimuli, eliminating nonvibration cues. Subjects' feet moved with the seat at 2 & 4 Hz, eliminating leg motion cues. Test order was randomized over subjects. Thresholds were near 0.01 m/s/s at low frequency for all axes. This is lower than the literature for vertical, probably due to the moving footrest. Lateral thresholds surpassed 0.04 m/s/s around 32 Hz and then dropped down somewhat. Longitudinal vibration had a lower amplitude peak versus frequency, probably due to backrest input. Vertical showed a peak at 32 Hz. 96 Hz thresholds were generally lower than the values in the literature.
机译：完成了研究以在2,4,8,16,32,64和96Hz处测量垂直，横向和纵向方向上的坐姿的振动感知阈值。测试了4名男性和2个女性受试者。测试在福特车辆振动模拟器（VVS）上完成，使用具有靠背的刚性座椅。采用了3次，1-up自适应Levitt算法。带状噪声提示是通过耳机进行的，受试者在刺激期间闭合的眼睛，消除非振控线索。受试者的脚在2和4赫兹的座位上移动，消除了腿部运动线索。测试订单在受试者上随机化。对于所有轴，阈值近0.01米/ s / s。这低于垂直的文献，可能是由于移动脚凳。横向阈值超过32Hz的0.04米/ s / s，然后稍微掉下来。纵向振动具有较低的幅度峰值与频率，可能是由于靠背输入。垂直显示在32 Hz的峰值。 96 Hz阈值通常低于文献中的值。

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