The pad porosity study is finally getting underway. The goal of the study is to test the porosity of the covering of several different brands and types of pads and then compare that data with the acoustic losses of each pad. There are 12 different pads being tested from Pisoni, Music Medic, and Jim Schmidt. The set-up for testing the porosity of the pads is shown in the following photos. All pads being tested are 30mm and are without a center hole or resonator. A perfectly airtight pad made from neoprene is used as the control. The amount of closing force (weight) on the key cup required to register 0 with the control pad is the weight used in the study. All of the pads were tested with both 4"H2O and 2"H2O initial pressure. Once the tests have been replicated by another tech to check the accuracy of the data, the pads will be sent to Dr. Pauline Eveno in Paris to measure the acoustic losses of each of the pads. Once these tests are completed, the results will be made available for anyone who is interested.