The purpose of this science fair experiment was to see if the size of constraining layer and damping layer in Constrained Layer-Damping would reduce or increase the effectiveness when damping the sound of an object. The experiment was tested using a microphone and a free audacity program. The microphone was used to measure the peak of the sound(dB) and the amount of time it took for the sound to completely stop. The audacity software was used to record and save all the data that was received from the microphone. Based on the data that was recorded in the experiment, results were extracted by observing the amount of time it took for the sound to go from start to silent and by observing the highest point in sound that was given off (peak). The hypothesis for this experiment was proven true because because the constraining-layer damper that had the largest surface area reduced the sound duration and the peak sound level the most in all 4 trials. In conclusion, the results show that the larger the constraining layer and damping layer, in proportion to the item you are trying to dampen, the more effective the CLD will be.