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The damping ratio can for any two adjacent peaks. This method is identical to the above, but simplified for the case of n=1:
: <math> \zeta = \frac{1}{\sqrt{1 + (\frac{2\pi}{\ln (x_0/x_1)})^2}}, </math>
where ''x''<sub>''0''</sub> and ''x''<sub>''1''</sub> are any two successive peaks.
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