Damping
Structural damping determines
how quickly an excited resonance in a table top decays. The simplest
way to measure damping is to hit the table top with a hammer and
measure the decay with an accelerometer and oscilloscope or spectrum
analyzer. The height of a resonance peak in the “compliance
curve” also measures damping.
For a more information see the Dry
Damping Page
Compliance
Compliance is a reciprocal measurement
of the dynamic stiffness of a table top. The data are obtained
by inputting a measured force to the table top with a calibrated
hammer and measuring the resultant acceleration (or displacement)
with an accelerometer. Compliance is the ratio of displacement
to force expressed as a function of frequency
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