Tapered poly diffuser -- your thoughts on this design

[noviygera]

Hi,

I wanted to share this design and get some feedback from serious guys. Please, let me know what you think of this poly.
The idea/goal is:
1. to have not too much mid and highs absorption, only bass;
2. to have nice, natural ambiance in the room. Not for studio, this is for casual listening, 2ch stereo.
3. Also this is not to optimize one small "sweet spot" but to have a large balanced listening area more or less even throughout the room.

These polys may be used on all walls and ceiling.

photo.JPG

What do you think of design, effectiveness and application?

[Soundman2020]

It's an interesting design, and I don't see why it wouldn't work to diffuse low-mids and some lows, to a certain extent.

The idea/goal is:
1. to have not too much mid and highs absorption, only bass;

Those are diffusers, not absorbers, and you show them positioned at low efficiency locations for bass trapping, so they won't accomplish your goals of absorbing or diffusing bass. You would still need bass trapping, and the amount of trapping would depend on the room size.

2. to have nice, natural ambiance in the room. Not for studio, this is for casual listening, 2ch stereo.

They should work for that, to some extent.

3. Also this is not to optimize one small "sweet spot" but to have a large balanced listening area more or less even throughout the room.

They will help with that too, but balancing room acoustics isn't just about diffusion alone: it is about overall smooth treatment such that the decay time is constant at all frequencies. Some of that is done with diffusion, some with absorption, and some even with reflection. One type of treatment alone is not going to give you the entire solution.

But the concept is interesting, and if you do decide to build them then it would be great to see "before" and "after" test results, using REW, to show how they affect the overall room response.

- Stuart -