Here is a Matlab GUI script which converts between various damping metrics: damping.zip

The supported metric include:

quality factor Q

fraction of critical damping [zeta]

loss factor [eta]

3 dB Bandwidth [delta omega]

3 dB Bandwidth [delta f]

damping frequency [fd]

decay constant [sigma]

time constant [tau]

reverberation time [RT60]

decay Rate D

logarithmic decrement [delta]

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See also:

Damping, Isolation & Vibration Absorbers Page

Half-Power Bandwidth Method

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– Tom Irvine

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