Changing the Depth of DIY DBA-Acoustics Forum-Acoustic Fields Forum

Hello

I want to build and test the BDA from DIY plans but due to furniture occupying my room which is quite large but yet even if i move things to free up space, i can’t fit 16inch deep cabinets in spaces that would not sacrifice functionality and general aesthetics of the room even tho they look quite stunning.

So i have decided to go with modular design and i like the design that you have with those modules 24x24x12, but maybe i would go with 10. But as you know, that changes relationship of how 2 front walls would function.

I forgot the formula how deep the cabinet is in relation of frequency it “absorbs” i just remember it needs to be efficient for only quater wavelength.

My questions are :

1. If i change cabinet depths, how do i change 2 walls relation ( space between 2 walls that slow down the wave), i think they have to be in symbiosis with the wave it absorbs so they are frequency dependant . and also what is relation of air space (how much air fill i need) Foam thickness stays the same so i do not have yo worry about.

2. How much is bda effective with 10inch depth and 12 inch ?