@richardbrand It is common for elastomeric bearings to be placed between bridge piers and girders to accommodate thermal expansion and contraction (their primary function), as well as rotation and vibrations from traffic loads transmitted to the piers and foundations. Similarly, gel-like dampers placed between speakers and stands act as isolators, controlling the transfer of vibrational energy into the stand structure. This helps manage resonance behavior and can contribute to cleaner, more controlled bass response.
A well-designed isolator should achieve a balance between stiffness and damping. The stiffness of the material determines the system’s natural frequency, which should ideally be tuned below the audible range (typically below 10 Hz). The damping ratio, on the other hand, should be maintained within an optimal range to ensure good sonic performance.
Materials with very low damping, such as springs, may lead to excessive resonance, resulting in smearing and bass bloom. Conversely, overly damped materials like soft gel pads can sound dull and may reduce micro-dynamic detail. The drum dampeners I was using is not that soft and actually a bit springy. Its bass performance is quite solid, better than hemisphere silicone feet.
