Sound Proof Door?

[JoelG]

When I created a music rehearsal studio in a detached garage, I researched soundproofing and learned about Quiet Rock drywall, staggered studs, mineral wool insulation, channels, etc. and also, STC (Sound Transmission Class) ratings for doors and windows. I used Milgard Quietline Windows and STC rated exterior doors. These were metal and would really not look that attractive for interior doors. I have not researched interior doors, but may be needing to in the near future as I am now remodeling my audio room. It would seem that rather than just getting a solid exterior door, there would be options for interior doors that are attractive and designed specifically for soundproofing and isolation and therefore soundproof better than a good soling 1 3/4 thick solid wood or metal door. All of the wall and other treatments to soundproof a room are of little value if there is sound escape at the door(s).

[W9TR]

Solid core exterior doors, properly gasketed, work great. if you want more isolation, check out Acoustical Surfaces, Inc. I specified their doors for studio isolation when I was in the broadcast business. For low frequency attenuation, you need mass! These weigh 300 to 400 pounds.

[dirtbag]

You could also try using a door with a 45 minute fire rating. They typically have a mineral core that helps with the STC.