I have a room in my home office that I want to record in that has a hollow-core door. I want to sound-proof this door and was wondering what type of products exist that I could affix that would give me as much sound-proofing as possible.
Also, since this room doubles as a conference room on occasion,
I'm looking for something that has a bit more of a finished look than something like egg-crate foam sheets. Something that generates 'conversation' is fine, but 'cheap-o' is bad.