What are the reasons why rubber shock absorbers are ineffective?

Rubber shock absorbers are very versatile. Any shock absorber has its limitations. For example, spring dampers cannot be used for vibration isolation of machines with similar frequencies on many occasions, and air cushion dampers may not be used for vibration isolation of vehicle-mounted equipment. But this does not mean that they do not have damping effect, only that they are not suitable for some occasions.
 
The same is true for rubber dampers. Rubber shock absorbers are suitable for high-frequency vibration equipment, but also for some stamping type of vibration, the effect is very good! Many rubber shock absorbers on the market only have the appearance, they are designed on the premise that they are not designed according to the demand for vibration damping, such products can not be called shock absorbers at all, this situation is the root cause of the defeat of rubber shock absorbers.