| Prove it
Dennis, I am surprised that you can remember the wedding :-)
A version of MicroDisney did a reunion gig a few months ago. I mixed it. Great fun.
Talk of reunion.
Major flooding here recently.
You are sure about your location, now lets be sure about the issues.
It can be difficult to tell where sound is coming from. Footfall can travel through the gap around the door, through the door, through the concrete floor which will rebroadcast it near you. Likely all of the above. So you need to identify the strongest paths and prioritise your attacks. If it is through the concrete, then a floating floor is needed. You probably need a good floor surface anyway, so why not do a decoupled one. Just don't bank on this working 100%. Doors are often the weakest link, solutions are difficult to construct and proven commercial products are very heavy and expensive.
The plasterboard companies have specs for the various constructions. I doubt if they go for 3 layers. I would expect another 3-6dB for each extra layer. 2 should be fine though, just use thicker, heavier, acoustic board. LaFarge look good on paper. Focus on the detail, the screwing, gluing. Check out lots of detail at john sayers and studiotips. It may be best to create internal walls using steel studding, fulling floating from floor and ceiling. This seems to slightly outperform wood and won't shrink causing gaps later. The steel itself functions as RC but I would use the channel as well.
Andre, what product do you use to decouple the ceiling and floor plate from the concrete above and below?
I noticed another couple of points on reading again. Large Limp Mass Traps on the front wall? Again controversial. I reckon the back wall would be a much better location for these.
Your front wall could be gapped out from the concrete if you have space, creating a very large damped plasterboard trap. That should help with SBIR.
Diffusion between the monitors doesn't make much sense here. Consider it behind you.
While we are making gaps, if you have the space you should optimise your internal room dimensions.
I don't want to be so negative However you have mentioned quite a few ideas which are dubious, and this job is a bear. If this doesn't work 100%, will you neighbours tolerate your presence? 'Quiet shared space' scares me.
Take some time. Research more, there is tons of stuff on the forums mentioned.
Get Rod's book. Maybe ask a pro to look at the space and your plans before proceeding.
Best, DD |