It goes up to eleven...
Last night I was able to really clean up the floor while the poly on the door dried. Smoothed things out and layed down the felt underlayment.
with the leftover felt, I was able to fill the gap between the door frame and the studwall. This picture isn't really clear...
but here's an overhead diagram of how it all works out. The felt will get covered by SilentSeal® caulking just prior to the trim board being placed over it.
I did an initial reading with my iPhone dB meter, and it read 36dB average. So far so good.
A newspaper interview
1 week ago