However I did use Woodland Scenics foam under tubular "O" gauge track. The foam was glued to the plywood and the track glued to the foam. No fasteners thru the metal ties into the plywood. They run almost silently with the sounds turned off, the primary sound you hear in that case is the wheels going over the rail joints. Kind of like a real clickity clack as opposed to the electronic sound offered by the different operating systems and cars which can get pretty annoying
