Drapes or Blinds for Patio Door

Hello,

I recently hung a new moving blanket over my back wall, which happens to be a glass patio door, and immediately noticed an increase in sound quality. It reduced excessive harshness and tightened up the bass. Obviously, I cannot leave the blanket hanging on the door. There are numerous choices for sound absorption. Does anyone have suggestions regarding what type of blind or shade works best?      Thank you!