I know this has been discussed zillion times before , but want to share my findings and experience. 1. Frame Vibration vs String Vibration ? Understand this first. Racquet Frames don't vibrate on its own unless the vibration from the strings passed to the frame. When the strings make contact with the ball, they vibrate and produce shock waves which then propagated to the Racquet frame and then to your forearm , elbow , upper arm and then finally shoulder. 2.All strings vibrate No matter how it is advertised , it vibrates. But some may be more and some less. 3. Do you need a dampner, Well it depends on three things , 1. Type of the Racquet 2. Type of the string and tension 3. Style of play and your level 4. Shoulder and Arm Strength - Very important We all know these are true . Heavier racquet can absorb more shock , no doubt (Wood is the best- People never needed dampners on those days). Also smaller head size racquet vibrate less. String - Stiffer strings vibrate a lot. Lower tension produces less shock. If you do lot of off-center shots , more shocks are produced and passed to your arm. Now lets come to 4th point, The more shock you arm and shoulder takes , they become more tired. This is in addition to the regular fatigue. So when they are tired , even a small amount of shock could makes it worse. If the dampner can cut string vibration less 25%, does it make sense to have it on. So only 75% of vibration passed to the racquet frame which is better than 100%. Now , Do the dampners reduce string vibration ?, yes it does. Take a thin wire and hold it at both the ends streched and tight . Ask somebody to tap it in the middle , you handle would feel the vibration. Now also ask the person to put his finger at close to one of the end , now tap it in the middle. Now What happened to vibration to the hand close to the other persons finger, it gone or less. The person's finger is the Dampner here. So why the dampners are small and just on between 2 center strings. What good that would do. Think about it. 90% of the shots do get hit on those strings, unless that is the very first time you ever touched a racquet. Thats why those 2 string breaks often. So do you need a dampner ? If you have week arm and shoulder and set to play lot of tennis and have it on. The Worm type shock busters are better than button type or rubberbands. Finally , Don't compare you with a Pro. Very Bad. Their practise , prefect strokes and Equipment are so different from mine or yours.