Difference thresholds for primary and secondary ride of a vehicle on a 4-poster test rig
在四柱试验台上模拟两种路面，测量14名汽车工程师对主频段（0.5-4 Hz）和次频段（9-80 Hz）振动的相对差异阈值，发现阈值随路面和频段变化，韦伯定律不成立。
Not only is it important to know how large the overall change in vibration should be for occupants to perceive an improvement in comfort, but also how large this change should be in specific frequency bands. Relative difference thresholds (RDT) of primary (0.5-4 Hz) and secondary (9-80 Hz) ride are estimated for 14 automotive engineers seated in a vehicle on a 4-poster test rig over two roads. Resulting stimuli differed in magnitude and spectral shape. The median RDTs estimated for primary and secondary ride were 16.68% and 13.82% on the smooth road, and 9.50% and 24.67% over the rough road. Statistically significant differences were found in the medians of the RDTs between (1) primary and secondary ride on the two roads and (2) the two roads for changes in the primary and secondary ride, suggesting that Weber's law does not hold.