Mapman's right; these pads are for acoustic vibration. IOW, isolating the TT from standing waves or feedback, or to neutralise the sound of the surface that the TT sits upon; ie, glass, wood.
I'm sure other members will have suggestions, but using a separate platform is a good idea. Try looking in the archives.
I'm sure other members will have suggestions, but using a separate platform is a good idea. Try looking in the archives.