My house has several transfer grilles like this:
Except they have no baffles inside them, so light and sound come through into our bedrooms quite easily. I'd like to put in a sound maze like this to block light and sound:
My concern is that I will be restricting air flow enough to impact the HVAC system's effect on these rooms when the door is closed. Is that a valid concern, and if so, what considerations should one make to maximize air flow through a sound maze like this?
Yes, it is definitely going to impede the circulation of air. The fan of the HVAC blows the air very gently, so much so that for a large room one register maybe not enough.
For blocking the light you could try hanging a small drape 12 inches in front of the grill.
If the noise is really a nuisance the only effective solution is to connect your grill directly vis a flex duct to the HVAC system.
You can hide it in a cosmetic soffit.
You can maximize airflow by oversizing the output. I am working on a design like this, as per Rod Gervais 'Home Recording Studio' book but having a hard time sourcing the Johns Mansville Linacoustic R300 (rigid duct liner board) that he specifies. This seems to be the only product that has acoustical testing data. I may have to settle for the Linacoustic 1" rolled liner, if I can even get that, but need to consider some other options because this is holding up my HVAC contractor now. Any other ideas? I have two HVAC vents in my home studio live room and don't want the sound to escape to annoy my wife in adjacent rooms downstairs.
