I think this is what Lil has in mind:
conduit-donut.png
Rough idea, of course. Just cut the pipe to decouple the two ends, then stick some kind of a "donut" of acoustic material in the gap to maintain continuity of the pipe (so you can still pull cables through it!). I'm thinking that even a strip of soft rubber, neoprene etc. rolled up into a pipe-shape (the way you roll a carpet), and cable-tied at both ends should do the trick. Maybe instead of cable ties, you would just use good old fashioned (gasp!) duct tape to keep the rubber section in place. It would have to be longer than I show in that diagram, of course.
Lots of options.
Is that what you had in mind, Lil?
- Stuart -