In article efce452b-63fe-47a9-ad17-a1f3a61beac3
@s12g2000prg.googlegroups.com, misc.consumers,
says...
I'm trying to dull the tapping noise from the pipes in my ceiling.
What materials could I use to deaden the noise? I tried cork tiles
but that had no effect whatsoever on the noise.

Have you considered fixing the problem, rather than patching the
symptom?

I've read that the idea is to use many layers of different materials.

Won't work. ...unless those layers are stuffed in your ears.

--
Keith