Lundström R
J Biomech. 1984;17(2):137-44. doi: 10.1016/0021-9290(84)90131-3.
The mechanical point impedance has been studied in ten different areas of the glabrous skin of the human hand on three male and three female subjects within the frequency range of 20-10 000 Hz. For all tested areas the impedance decreased with increasing frequency down to a minimum value, corresponding to the natural frequency of the skin. After that, the mechanical impedance was directly proportional to the frequency. The highest natural frequency, about 200 Hz, was measured in the distal areas of the finger and the lowest, about 80 Hz, in the proximal areas of the palm (thenar). Small differences in internal damping were also showed to exist. A great amount of handheld tools used in industry have their maximum vibrational levels within the natural frequency range of the skin. In order to avoid adverse effects the skin's mechanical properties should therefore carefully be taken into consideration at designing vibrating tools.
在20 - 10000赫兹的频率范围内，对三名男性和三名女性受试者人手无毛皮肤的十个不同区域进行了机械点阻抗研究。对于所有测试区域，阻抗随频率增加而降低，直至最小值，该最小值对应于皮肤的固有频率。此后，机械阻抗与频率成正比。在手指远端区域测得的最高固有频率约为200赫兹，而在手掌近端区域（鱼际）测得的最低固有频率约为80赫兹。还显示出内部阻尼存在微小差异。工业中使用的大量手持工具，其最大振动水平处于皮肤的固有频率范围内。因此，在设计振动工具时，应仔细考虑皮肤的机械性能，以避免产生不利影响。
