whats the difference with regular vibration damps and a rubberband?

Answer 1

The answer is that there is no difference at all. The fact is (and it is usually crushing to most) that "vibration" is not absorbed by any of these little things. Vibration dampeners only absorb SOUND waves. If you do the math, you'll find that if a vibration dampener absorbed even a very low percentage of the VIBRATION waves produced by an impact with a tennis ball, it would burst into flames because the amount of energy is far too high to be concentrated in such a small space!
So, when you hear the difference in the sound of your strings when the dampener is in that is really the only difference! All of the vibration waves are still making their way into your body and if the stroke is incorrect, causing tennis elbow. These dampeners were originally marketed to prevent tennis elbow because they "absorbed" or "dampened" harmful vibration. The change in sound though is a powerful PLACEBO, but is useless in preventing injury.

Answer 2

Tennis vibration dampers absorb low frequency string vibrations. They do absorb vibrations but not racquet vibrations and shock. The only dampen the string vibrations which is the sound it makes at contact. Some players prefer a duller sounding thud on contact.

Answer 3

there is no difference.

Answer 4

cost..