This doesn't make sense to me. What is "static compression"?As best I can tell from manufacturer tear sheets a static compression of 2" has a resonant frequency around 1Hz.
You need to know the stifness constant, which, if not specified can be calculated by dividing a specified force by the resulting elongation/compression.
Any serious spring mfgr/distributor should have this information ready.
Where did you get this? Pure nonsense. Resonant frequency depends on stifness and total suspended weight.As best I can tell from manufacturer tear sheets a static compression of 2" has a resonant frequency around 1Hz.