I´m going for a rebuild of my too dead home theater. My understanding is that the soft front wall is the problem for this. But since it´s build on the wall and not movable boxes I don’t want to remove everything, but rather modify to make something good with it. I have a wood fibre insulation material, flow resistivity ~5000 Pa.s/m2, fully filled behind the textile cover.
I also have a big ceiling absorber with 95mm thick wood fibre. Its purpose is for first reflection, but I´m not sure it´s optimal placed at the moment. Must check it with a mirror.
Solution, just my thought is to add slat panel in front of the black textile. I would like to increase the decay from ~300 Hz and up. I´ve done simulation with
http://www.acousticmodelling.com/multi.php
The measurement are from testing with and without three wall absorber panels (600x600x200mm) on the right wall for handling the first reflection. I think they need to be covered with MLS slats to keep some of the reflection->decay? Or is it better to just use diffusion panels to keep all energy i the room?
450mm depth
I can add two horizontal 200mm slats with 20mm slot and 5mm gap from textile.
Since I don’t have a sealed cavity behind, I did two simulations to understand how the depth will affect, and my guess is that I will have reflection from ~300Hz. How the absorption graph will look I don´t know but I guess I´ll have some absorption.
http://www.acousticmodelling.com/mli...=9999&v23=5000
250mm depth
MLS slat slot panel to get a more diffuse reflection.
Something like 50mm slat, 20mm slot for more reflection surface.
Or mabe remove this absorber section?
Angled 300-450mm deep
MLS slat slot panel to get a more diffuse reflection.
Something like 50mm slat, 20mm slot for more reflection surface.
Do you think I´m going in the correct path of increasing decay from 300Hz up but also make it a bit more even from LF to HF?
I think a goal would be ~250 ms.
BR
Niklas
