At work we have all the equipment to test this. However, it would be a major exercise to do it, and I would need someone to front a funding bid, plus do a lot of literature review. With regards to what I have read on acoustic properties of woods, it generally involves looking at fairly direct vibration of the wood itself, and I don't think this is the case with an electric bass guitar, as it would mean that the sustain would be very short. Life's relatively full of other things at the moment (e.g. I am doing light and sound for a gig on Saturday so I need to prepare and test my gear tonight), but I might get some chance over the next couple of weeks to determine the energy in a string when plucked, measure the sustain, find some information on the sustain when transmission of vibrational energy to wood is not a factor, and calculate the energy that might be imparted to the wood. I am not sure I want to drill holes in my patio (I don't have a concrete rail sleeper to hand) to mount a bass bridge and tuner to determine the free air sustain myself!