Vibrationperception threshold was complete and the patients were grouped into high-risk group, middle-risk group and low-risk group according to the result of vibrationperception threshold.
作震动感觉阈值检查，并根据震动感觉阈值检测结果将其分为高危组、中危组和低危组。
2
A vibration that has a higher or lower frequency than a sound, he found, tends to skew pitch perception up or down.
频率超过或低于声音频率的震动会分别引起音高知觉的上调和下调。
3
Harshness: the human perception of noise, or vibration, or a combination of the two, that cannot be measured directly in engineering units.