Join Date: Apr 2006
Thanked 160 Times in 157 Posts
Rep Power: 12
Two stiff fingers can go "tap tap" just as well as a plastic hammer. The problem being that many folks are tone deaf and wouldn't know the difference between "thud" and "thunk" if they practiced all day.
So a moisture meter isn't perfect, but the folks who are tone deaf at least have a chance to get some visual indication fro mthe meter dial.