A couple of years ago we finished renovating our house. We turned our semi open-plan living room into a music room/library and installed a large internal sliding barn door to enable the room to be separated from the kitchen and rest of the house (previously there was no door). Unfortunately, although it looks great, it's not practical from a noise point of view. There is a large (1 1/2' - 4cm) gap on 3 sides of the sliding door (top and sides) so any music practice that goes on (cello, piano, French horn) reverberates through the whole house. What do others recommend we do to sound proof the door while still ensuring it looks as nice as it currently does?
This shot shows the gap fro the music room side.
Here's what it looks like from the music room. The door is the width it is so that it looks right when fully open behind the piano.
This is the door from the kitchen side. You'll see from the previous photo that the door is quite a bit wider than the opening, so I think it would be possible to fix some sort of soundproofing strip to the kitchen side of the door without it being noticeable from either side. The question is, what to use for such a wide gap, and how to fix it onto the door.
Looking forward to some 'sound' advice! Thanks.