| 摘要 |
The characteristic curve of the skin surface impedance as function of the frequency of an alternating current voltage is measured by applying said voltage to one or more electric conductors which are galvanically or capacitively coupled to the surface of the skin and modifying the frequency, and then compared with a previously generated reference curve. If the characteristic shapes of said characteristic curves coincide to a large extent, the surface of the skin is recognized as forming part of living tissue.
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