In clinical test, there were 26 volunteers have been tested;
the range of age is from 21 to 50 years old. The SBP range is
from 94 mmHg to 142 mmHg, and the DBP range is from 57
mmHg to 92 mmHg by auscultatory method. The results
show the bias of SBP is ≤ 1.846 mmHg, precision of SBP is ≤
3.085 mmHg and the bias of DBP is ≤ 0.077 mmHg, precision
of DBP is ≤ 2.529 mmHg. The bias is the average of the
differences between the auscultatory method and our
measuring results, and the precision is the standard deviation
of the differences between