Abstract
We studied the potential use of the in vivo frequency response of human volar forearm skin as a means for evaluating skin age. The velocity and damping length of waves on the skin surface were correlated with chronological age. One hundred and fifty subjects from 1 to 95 years of age were studied. For the frequency spectrum from 800 to 2000 Hz, there was a linear correlation between the velocity of propagation and age. At 2000 Hz, the y intercept was 11.4 m/second and the slope was 0.245 m/second/year, r = 0.5500, p < 1 × 10 −7. There was no correlation of velocity with sex, skin color, obesity, sun exposure, physical activity, or inpatient status.
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