Institute of Sound and Vibration Research, University of Southampton, Southampton, UK.
Ergonomics. 2009 Oct;52(10):1305-10. doi: 10.1080/00140130903023709.
When seeking to reduce vibration in transport it is useful to know how much reduction is needed for the improvement to be noticeable. This experimental study investigated whether relative difference thresholds for the perception of whole-body vertical vibration by seated persons depend on the frequency or magnitude of vibration. Relative difference thresholds for sinusoidal seat vibration were determined for 12 males at three vibration magnitudes and eight frequencies (2.5, 5, 10, 20, 40, 80, 160, 315 Hz) using the three-down-one-up method in conjunction with a two-interval-forced-choice procedure. The median relative difference thresholds were in the range 9.5% to 20.3%. There appeared to be a frequency-dependence at the lowest vibration magnitude, such that higher frequencies had higher difference thresholds. The relative difference thresholds depended on the vibration magnitude only at 2.5 and 315 Hz. The influence of both vibration frequency and vibration magnitude on the measured difference thresholds suggests that vision (at 2.5 Hz) and hearing (at 315 Hz) contributed to the perception of changes in vibration magnitude.
在寻求减少运输中的振动时，了解需要减少多少振动才能使改善变得明显是很有用的。本实验研究调查了坐姿者对全身垂直振动的感知的相对差异阈值是否取决于振动的频率或幅度。使用三减一增法结合两间隔强制选择程序，在三个振动幅度和八个频率（2.5、5、10、20、40、80、160、315 Hz）下，确定了 12 名男性对正弦座椅振动的相对差异阈值。中位数相对差异阈值在 9.5%至 20.3%之间。在最低振动幅度下似乎存在频率依赖性，即较高的频率具有较高的差异阈值。相对差异阈值仅在 2.5 和 315 Hz 时取决于振动幅度。振动频率和振动幅度对测量的差异阈值的影响表明，视觉（在 2.5 Hz 时）和听觉（在 315 Hz 时）有助于感知振动幅度的变化。
