dasdoing
Major Contributor
you will never find a pro setup like this, because it will never sound balanced.
note that absorption coefficients are for random incidence (reverberant room)*, while you have a very specific incidence angle.
the best you could do is to simulate the left wall by placing another reflective surface to the right. you can then put the absorber to both sides and it would be much more balanced, at least in mid and high frequency range
*meaning it is the absorbtion of the sound running several times through the material at many angles
note that absorption coefficients are for random incidence (reverberant room)*, while you have a very specific incidence angle.
the best you could do is to simulate the left wall by placing another reflective surface to the right. you can then put the absorber to both sides and it would be much more balanced, at least in mid and high frequency range
*meaning it is the absorbtion of the sound running several times through the material at many angles