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Soundproofing

I have an unfinished basement space, roughly 1000 sqft that I would like to convert to a TV and 2-channel listening room. The ceiling is open floor joists to to the first floor, any recommendations on soundproofing materials that I could use to rough finish between the joists. Floor/ceiling joists are 2x10's.

Thanks,
David
h2gastech
bdp24's avatar
bdp24
4,908 posts
 

Folkfreak knows of what he speaks. His room is the best constructed I have ever been in, and is proof of the effectiveness of the ASC Wall Damp constrained layer damping product. I rapped on one of the walls in his room, and the sound produced was that of knocking on a thick piece of slate or a brick---a non-resonant click.

I bought some pieces of Wall Damp (it is sold in 4" squares), and put them between the two shelves (I bought extras, to double the thickness of each top shelf to handle the weight of my heavy turntables) I have on top of each of my Solid Steel racks. A cheap and effective upgrade!

erik_squires
5,268 posts
 
@folkfreak - Nice!
folkfreak's avatar
folkfreak
1,149 posts
 
Thanks @erik_squires -- amusing story is the installation instructions you receive from Art at ASC -- about 30 pages of closely spaced hand written notes and diagrams! Not for the faint of heart :-)

The room does sound great however and if anyone is ever in the Portland, OR area you're welcome to take a listen
audiotroy's avatar
audiotroy
1,621 posts
 
h2 we have a lot of experience in this arena, we built a soundproof wall which was insanly effective 110db in room 85db outside of room and we bult the wall out of inexpensive materials.

The room and total project was featured on Rev Runs Rennovation 
season 2 Secret Cinema 

here is a grainy non hd copy of the programhttps://www.youtube.com/watch?v=EqrxRo0vmf4

https://www.flickr.com/photos/58319891@N08/albums/72157650239108910

https://www.flickr.com/photos/58319891@N08/albums/72157650233548529

We are trained theater designers please let us know if we can guide you in any way.

Dave and Troy
Audio Doctor NJ


folkfreak's avatar
folkfreak
1,149 posts
 
Amusingly @audiotroy illustrates how hard this is -- 85dB is the noise level of a busy road! While 25dB reduction is impressive even at a more normal 95dB in room then 70dB out of room is the level of a vacuum cleaner. If you are looking for silence (i.e. 50dB or less) then you need some 40dB+ of isolation which is really tough to achieve. Even in my heroically isolated room my wife can still tell which tracks I’m playing when she is in the room above (leaks via doors, windows, bass through ceiling etc). The dB of the audio leak through wouldn’t be measurable (ie. its in the background room noise) but the ear is incredibly sensitive.
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