Man, you are trying to speed this whole thing up aren't you There are no current standards and actually none being developed. The industry really only cares about TL which there are 3+ different standards As to your variation question, lets ignore this one until we decide on a fixture and then I can actually test the differences. With the right fixture and chosen media we should be able to work around it. Fixturing is to measurements what location is to real estate. Typically the SAE guys are most interested in areas below 400hz. I can't easily model anything. I am an FEA noob, but I can load an FE model into the vibrometer and make measurements and verify a model is right easily. A simple piece of metal however is a very easy thing for someone with any FE experience to whack out. I have a 3D scanning vibrometer, meaning I can measure X,Y,Z vibration and then scan the laser across the surface with a high point density. Regularly this is used to verify FE models as well as measure experimentally. Most definitely we can abstract this to the real world. Everyday the automotive manufacturers do. It is also very easy to compare the damped and undamped measurements. I'm taking an intro to FEA class this semester. If we cover anything that I think would be useful, I'll be sure to let you guys know.