Links appreciated!

Not a big fan of foam or ceiling treatments. Compresses the sound and makes it all phasey.

The best way to proceed with room acoustics is to first map out the entire room for sound pressure, which requires a sound pressure level SPL meter and a test tone generator and one or more test tone frequencies. Without a map you’ll be unable to find the treasure. All attempts to treat the room by trial and error are like trying to solve x equations in x + n unknowns.

When you have located standing waves, slap echos, sound pressure peaks, e.g., room corners, first reflection points then those acoustic anomalies can be treated with some appropriate acoustic device. I am not (rpt not) saying these are the only anomalies in the room, but they are the major acoustic type anomalies.

For every action there is an opposite reaction so room treatments can often have negative reactions, for example tube traps and diffusers must be located with care, a tube trap directly in the corner might not be the ideal locations. And like speakers tube traps can usually benefit from some damping. In addition, speaker position is critical in a given room and must be re-evaluated as the room treatment program progresses. Speaker location itself is an entire discussion and cannot be done Willy Nilly.

I scrupulously avoid treatments such as SOXEX foam as even a small amount in the room obviously hurts the sound. Don’t get me started on chairs and sofas in the room that contain foam. One should proceed with caution as it’s quite easy to over-commit to some concept or another. Don’t get trapped by self-fulfilling prophecies. I’m a big fan of resonators, like crystals for example, isolation, Helmholtz resonators and even some far fetched devices such as tiny little bowl resonators and Schumann frequency generators. and so much more. Heck, I’m even a fan of isolating all furniture in the room.

Geoff Kait
Machina Dynamica
Not Too Chicken to Change

Are you referring to Ceiling treatments, been there done that. Didn’t like the results. I would not say never though.

As for “funny little bowls” he who laughs last laughs best. :-)

One of the very worst sounding rooms I ever heard was one that had around $20,000 worth of room treatments. No air, no soundstage, no extension, no pleasure. :-(

Maybe start to think in direction to place Tbe traps in room.
There are :
ASC Tube traps
and
SST Tube traps on market available.
On their pages i found a lot of useful tips.
Regards
DS

The interesting thing about tube traps they often don’t sound good in room corners, that’s because the way standing waves set in rooms is all different, you can just assume the standing wave is in the corner. It might actually be a foot or two over to one side of the corner. The only way to determine precisely where a tube trap should be located in a given room is by using a Sound Pressure Level meter and a frequency tone of day 200 - 300 cycles. Or pick a frequency of your own. It’s the same for any type of resonator, their response can be somewhat generalized by optimum results are going to be different in different rooms. It’s actually rather easy to hurt the sound if one isn’t careful.