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{{more citations needed|date=February 2012}}
[[File:Dampingratio111.svg|thumb|400px|The logarithmic decrement can be obtained e.g. as ln(''x''<sub>1</sub>/''x''<sub>3</sub>).]]
'''Logarithmic decrement''', <math> \delta </math>, is used to find the [[damping ratio]] of an [[underdamped]] system in the time ___domain.
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