SPL and Audacity

[flynwill]

I think that isolation and acoustic treatment are largely separate problems, but both require some forethought and planning.

You haven't said how big a room you are planning, that will probably significantly effect the suggestions.

Things like making the walls not parallel and making the ceiling not parallel with the floor need to be designed in from the start. That trick alone will go a long way towards limiting the resonances in the room and allow the wall and floor treatments to be much more "live".

On the ventilation, a duct with internal insulation (or the commonly available insulated flexible duct material) with three to four 90 degree bends will go a long way to damping any noise traveling down the duct. If you are feeding the room from a building system that is already some distance away that will likely suffice. Also the lower the air velocity the better, make the last section of duct and the grill oversize so that the velocity is low. I've also seen air inlets that are basically long slits which if done correctly can be very quiet.

[kozikowski]

"There was obviously a mistake in the blueprints, so we straightened up all the walls and ceiling for you."

Koz

[kozikowski]

If SPL Meters measure things like manufacturing machinery pounding and screaming and music sound system hearing hazards, how do you measure echoes and background sound leakage?

Koz

[cyrano]

With a very efficient omni speaker and a 500W amp capable of producing 135 dB...