Question: Sound Treatment behind the Listener?

Wow! Some very good information.

ozzy

Ozzy, I followed the Anthony Grimani acoustic recipe, here is a diagram. Notice absorbers behind the MLP and 3D diffusors to each side:

Mostly absorption, a little diffusion

For some reason I thought one end of the room (behind the speakers) should be the "dead zone" and the other end (behind the listener) should be the "live zone".

No credence to that notion?

ozzy

So you also went with sound absorbing material?

ozzy

For my room, I treated all walls plus ceiling.

Room sound went from bright and edgy to calm and peaceful.

Bigger improvement in SQ than any gear swap.

See my pics in virtual systems.

So, you think absorbing material should be used?

ozzy

when i designed and built my listening room, i purposefully put a room length storage closet behind the listening position, then mounted heavy duty curtain rods above that area, hanging heavy velvet curtains to help absorb the sound from behind

i think this contributes quite a bit to the room being well damped... as i can open the curtains and hear a difference

this may be worth your giving a try ozzy

Thanks for the help.

The DIY cd rack at the back wall (behind me) starts at about 4 foot high and does go to about a foot from the top of the ceiling. It covers the width of the room. The rack does have many open spaces between the cd's. Again, I thought it would help with "scatter affect." But I’m not sure where I got that idea, and I did need a place for the CD’s.

These days I don’t play CD’s and I thought about taking down the racks. The Gika Acoustics or the T’fusor, looks to be an interesting option. Should they be placed in the center of the rear wall?

BTW, the rear wall is about 17 wide and 8 feet high.

ozzy

You don't wall sound directly behind you bouncing back at your head. Directly behind I use absorption and then to the L and R I use 3D diffusors, maybe try either of these:

https://auralex.com/tfusor-3d-sound-diffusor/

or

https://auralex.com/geofusor22/

ozzy OP

6,511 posts

04-10-2023 at 08:34am 

I am sitting about 1/3 from the rear wall, or about 8 feet.

ozzy

I would recommend diffusers on the back wall, given your room's layout. I use the following in 6" thickness: https://www.gikacoustics.com/product/6a-alpha-panel-diffusor-absorber/

There in fact a combination diffuser / absorber / bass traps

Diffusors high up help also, so if your rack comes to waist-high it's worth putting diffusor panels above.

I am sitting about 1/3 from the rear wall, or about 8 feet.

ozzy

It depends how far behind you the wall is; in my space, it is far enough back that reflections have a minimal effect. That is partly because there is a hallway and an open doorway.