Soundman2020 - Studio Design Forum

assuming the walls are all 2x4 (or metric equiv - say 90mm) or 2x6 if load bearing (145mm) with 1" gap between existing walls and each other (25mm), then you have roughly 200mm - 300mm air gap between mass boundaries (fiber insulation counts as air space). all walls are type-x drywall x2 on the...

Sketchup. maybe something like this?

curious - did you do any measurement of existing isolation? your garage door and skylights will likely be your weakest but it's good to do actual testing esp with any connected structure as the flanking paths will be the thing that limits your ability to properly isolate drums and low frequencies. a...

curious - is the bolt and washer attached to the top plate also the bolt that runs through the pad and into the slats? if so, you're not decoupled there. the bolt is a solid connection to the slats. so in my mind, if this is the case, then simply fill the edge with some plywood to fit betwee the sla...

"ceiling closure at the junction of the dividing wall. Since I had to use slats to attach the wall to the trusses, there is a gap to fill" so the "slats" used to attach the wall to the trusses is somehow not even with other frame members? meaning you cannot continue the drywall a...

gaps in the mass boundary (mass, missing altogether etc) will result in isolation reduction. so match the mass - walls, ceilings, floor, windows, doors, and ensure no direct paths for openings (wiring, ventilation, etc).

something like this

coolio. most space couplers are typically ~100mm deep or so with some minor edge scattering at high frequencies. but if you have 75mm deep space couplers, then mounting them flush and leanving 25mm (e.g.) of air to the surface of the absorption should work fine.

coolio! once you do get the insulation up there and covered with cloth - adding slats will provide the scattering effect + some resonator effects.

having a single large room can simplify things. the foam insulation does not count as air for the purposes of isolation, it's a thermal treatment. and so you do lose the "isolating air space" - so a 2x4 frame (3-1/2" deep) + 1" separation of the innr frame from the exterior frame...

yes, concave peaks will concentrate the energy - which is why locations like peaks, wall-ceilng, wall-floor, and wall-wall corners are excellent places to add absorption as modal supporting energies converge. getting rid of oblique and tangential modes will help even the space - sometimes as much as...

yes, same for the return as well

one consideration is symmetry to the "noise" from the air system - mechanical noises as well as registers. the size of the rooms as well - what is needed to exchange air 4-6x per hour? if you have 250m3 volume and 4x / hour = 16m3/min x 30% of that space so going with say a 180cfm unit in ...

since the slabs are earth damped, a flexible expansion seal works. as far as the cabling - if you run the conduit in the slabs, then added a flex-joint between them works well. otherwise, as noted about space above for mechanicals, consider running the conduit above and/or cable trays (you'll want a...

plan your HVAC now. you will be running it 24/7 while the space is occupied, so your house system, unless you can multi-zone it and it has the capacity to exchange fresh air into the space 4-6x per hour, you'll need additional systems. mini-splits DO NOT handle fresh air exchange and CO2 build up i...