On Oct 8, 6:16*pm, jim evans wrote:
I'm about to hang one of the LED big screen TVs on my wall. *To tidy
it up I decided to run the cables through the wall. *When I cut a hole
in the wall I discovered it was filled with insulation. *It's an
inside wall. *The master bath is on the other side of the wall. *Why
is an inside wall insulated?

Noise reduction.

My previous home had insulation in every interior wall and was MUCH
quieter than my current home with no interior wall insulation.