I need to soundproof one wall in my room - Experts please help!

[Dange]

Originally Posted by Pier

The solution for creating a new wall made of plasterboards with a sealed gap seems the best so far.



What about using wood?
Isn't wood denser than plasterboard?

+1

I'd recommend a gap of at least 100mm between the new wall and existing, bigger gaps give better performance.

15mm Gyproc Soundbloc Plasterboard has a density of 12.6kg/m2. I've always struggled to find densities for plywood etc. though, but don't know if they'll be that dense for the thickness

[DanDan]

Generally plasterboard is denser /cheaper than wood.
Maybe 30mm of cement impregnated MDF is denser but much more expensive than two layers of 15mm plasterboard. There is a very good reason why the vast majority of construction, here and elsewhere uses plasterboard.
There are special grades of plasterboard which are specifically for acoustic purposes, much heavier. However much more expensive, so yet again, an extra thickness of the standard product will probably win out. Double layer techniques, plus the damped airgap, plus complete separation between this new structure and the existing one is absolutely the norm for this problem.
DD

[Pier]

Originally Posted by Dange

+1

I'd recommend a gap of at least 100mm between the new wall and existing, bigger gaps give better performance.

15mm Gyproc Soundbloc Plasterboard has a density of 12.6kg/m2. I've always struggled to find densities for plywood etc. though, but don't know if they'll be that dense for the thickness

Here are some wood densities but in cubic terms of different trees
Wood Densities
Appendix 1 - List of wood densities for tree species from tropical America, Africa, and Asia.

And here are some plywood densities in cubic also
Plywood Density - See See Plywood
WikiAnswers - Weight of Plywood

I don't know, a priori it seems to me that a big piece of 2'' of pine wood would weight more than the same piece of plasterboard. But it would probably be more expensive.

[avare]

[QUOTE=Dange;535634615mm Gyproc Soundbloc Plasterboard has a density of 12.6kg/m2. I've always struggled to find densities for plywood etc.[/QUOTE]

Pier gave some great links for densities. Here is another one.

Weights/Densities of common materials


Densely,
Andre