orangenumerik wrote: should i try to center them in the space between floor and ceiling or hang them relatively close to the ceiling?
Centered
I mostly stay out of these individual things. And I still have a problem not understanding how they work.
But I don't believe this is right.
Only I can't prove it, as little as you can prove the opposite.
This isn't meant in a bad way, I really mean what I say here.
Normally the further you bring absorption in a really free-hanging field the worse low frequent absorption becomes.
And I've read some sentences here from whoever, but they are all without any measurement to substantiate this.
Forgive me if I add to uncertainty. I immediately draw back and stand corrected if some data substantiates otherwise.
An analogy with suspended ceilings: you increase cavity and your low frequent absorption improves. You increase cavity that much that it looses a logical controlled wavelength relationship with the fixed boundary and the total absorption diminishes again with the emphasis in the lows.
If distance control shouldn't play a roll you could as well see the height underneath the ceiling as the cavity, since sound does not recognize a floor from a ceiling.
With baffels I have the same experience.
But I admit these hangers are some strange things. But I also believe that a lot of never measured assumptions are made trying to fill in the gaps.