Hello gang! Im dealing with a new issue at work and I though you might give me some much useful insight. Im trying to fix a component to a plate and using 4 screws and rubber bushings to attach said plate to the firewall. The component is around 5-6 kgs and needs to held in place firmly but cant be attached in a rigid way because it generates vibrations in operation. I need to run some NVH tests to see if the bushings do their thing. Problem is I dont know how to approach this: -Do I mount the the whole thing to a dummy firewall in which I introduce vibrations with a shaker and attach accelerators to the bolts to see what gets inside the cabin? Or do I shake the component and see what vibration I transmit to the dummy firewall? What is the best approach to check how well the bushings isolate? -How would a test bench look like? I know I need to do some tests with component freely moving (modal analysis) but how will I check for vibration filtering for example in the Z direction? If I attach the dummy firewall solidly to a test bench and shake the component wont that affect the results considering in real life the firewall moves too? Im at a standstill here, NVH is new to me so all advice is welcomed!