Shocks shouldn't really give you lift, they merely resist (absorb) continued action of the spring.

Were you able to ride with them and demonstrate the sound you are newly aware of? They want you to be happy and satisfied, They want you to tell everyone you meet about the great mechanics that you use...

I have a set of SnapOn wireless microphones and a receiver. When I have to find a mystery sound, I put the microphones the most likely places and then test drive (or better, have the help of a partner) then I listen and determine where (which micro) is the loudest.... narrowing it down until I find it.
Now, less technical could be a few lengths of garden hose and a roll of duct tape. **place so as to avoid air noise as you are moving through the atmosphere