A long time ago during a heated discussion along this line, a member who was a physicist, told of how they measured lots of vibrations in concrete (or some other super dense material). This was in an isolated room, away from outside influences and I believe it was in response to music being played. Normal measuring devices couldn’t pick it up.
When I got my Iso-Acoustic Orea footers for my integrated and SACD player, I tried them out on the integrated first, thinking it would be of minor, if any, improvement and wouldn’t be apparent if I tried the SACD player first. I was wrong. The Oreas made a slight but notable difference in the sound, all for the better. More focus, better sound staging, etc.
All of this was done on my carpenter made audio/video stand made of 1" thick maple. You won’t know until you try it.
All the best,
Nonoise