Acoustic treatment for side glass doors / please, need ideas.


Sadly, wife's home renovations forces me to move my audio system from the family room (not the best place anyway) to a small room but with side glass doors (sadly yes, BOTH sides). Room is small, 15"(L) x 10"(W) x 9"(H) . I was considering install drapes (maybe better, roller shades) because in that area cant have fixed solutions. I really need some advice here because this change can ruin my relax moments listening my records and having a glass of scotch.
Thanks in advance  
jorsan
Listening position is about 8 ft from the speakers so basically I have the end of the doors by my side.
Is going to be very difficult to cover the sides with pannels because aesthetics so I think this would be the only real option:
https://phys.org/news/2011-05-curtains-quench-noise.html

Not on the doors, but anywhere else. :)

Again, I really like black out courtains. When shopping, a neat trick is to put your ear next to the curtain. Not ON it, but next to it, you'll get a good idea of how absorbent they are.

Also, remember, deficits in some areas can be made up for (imperfectly but well) in others.

Best,

Erik