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
For sound absorption, over a glass door or window look for Noise Absorption Coefficient NRC rating.  In absence of this the thickness and density of a curtain would be two factors that contribute to lowering reflections.  For a specific solution for this check out Quiet Curtains tested curtains.  There also maybe be one or two other companies that have this information.  


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The problem is a lot worse than people suspect as windows vibrate, walls vibrate, and there are a whole bunch of sound pressure peaks distributed around the room including room corners and the 3D space of the room. Room acoustics requires an in depth analysis and a multi pronged attack. If it was easy everybody could do it.