Ingress-Safe taps and splitters where introduced to us the other day in a company overview.
http://www.technetix.com/index.asp?pageID=25
Basically, by swapping out your tap faceplates to this company's taps with thier "Ingress-Safe" technology ... They are saying you can reduce the noise generated by the drop system. I know that here in Vegas, it's looking like the MSO is going to roll out these taps into the MDU paths first to test it out and see if there are real reductions in the low end noise.
Worth looking into if you have a small system.
This is CABL.com posting #271316. Tiny Link: cabl.co/mbiKe