Amazing Soundproofing Document!

I just found the most amazing document from the California office of noise control. It lists the STC and IIC ratings for HUNDREDS of varied wall and flooring setups. Its a 6MB pdf so I don't think I can attach the file, but I can link to it. The link is http://www.toolbase.org/PDF/CaseStud...cc_ratings.pdf

If you are at all interested in soundproofing, please take a minute to look at this if you haven't seen it before. Maybe this is a common file here, but this is the first time I have ever come across it. It's the most comprehensive source of info on soundproofing I've ever seen.

Hi Ted,

I read the article on your site. I'm wondering, In my room I was attaching the 5/8 drywall directly to my ceiling joists and then using green glue between that and another sheet of 5/8 drywall. My ceilings are angled. How much of an advantage would I get from using clips and resilient channel under the drywall. Could I even use RC on an angled ceiling? I don't want to waste money by attaching all of this expensive drywall+green glue+drywall to the ceiling and having the roof act as a resonator and send noise throughout the entire neighborhood or through my entire house. I need it to be quiet outside and relatively quiet inside. (This will be a project recording studio with drums and loud guitar and bass amps.) Can you give me your expert advice.

With my current plan, I will have green glue with sealed edges from floor to ceiling between either two sheets 5/8 of drywall or two sheets of 5/8 osb (floor).

Josh

The side walls are standard double stud contruction with the outside walls being considered one of the stud walls. All is filled with r11 with a 1 1/2 inch gap. I closed over the windows on one side of the room, but on the other side there is a 37x24 low e replacement window which I doubled in the inner stud wall (i.e. I have two low e windows with a 1 1/2 inch air gap and I sealed the gap between the two window frames with GM trunk rubber.) The floor has a stairwell in the middle typical to many homes build circa 1920. To cover the opening of this staircase, I am fitting it with a regular solid core interior door laid flat over the opening and adding a layer of GG+ 5/8 osb to the bottom. (The door frame is reinforced with 2x4s.) This door is also sealed with GM trunk rubber. The floor itself (from the joists up) is 1/4 ply, soundboard, 5/8 TnG osb, Green Glue, 5/8 TnG with only the two layers of 5/8 osb anchored together.

I'm thinking of building small receptical boxes to go behind all of the recepticles made of osb and gg.

Dennis and Ted,

Did either of you get a chance to look at my previous posts in this thread? Does my construction seem sound? Will my room do a good job of blocking typical low frequency sounds from the rest of my house and neighborhood?

Is there any way for me to combat the stairwell issue? Anything that has worked successfully in the past? Will creating a cover for the stairwell on hinges help to keep the sound from traveling downward?