The authors have measured human tissues from skin surface by using an impact response measurement system, which includes an impact hammer for industrial use. In this measurement system, the force values were not able to be used for analysis and the objectivity of measurement was not ensured completely because the impact forces depended on the way of hammer handling by each experimentalist. Then we developed a biometric impact hammer, which did not depend on an experimentalist, and constructed a measurement system. The proper measurement conditions were examined and the measurement errors of maximum force values were under 5%. Accordingly, this measurement system was practical enough in somatometry.
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