Sound Panels for Churches Choosing the right sound panels for churches  comes down to one clear goal - reducing reverberation so every sermon is heard, every lyric lands, and every moment of worship feels connected. For Texas churches specifically, five decisions determine whether your acoustic treatment works or wastes money: NRC rating of 0.85 or higher  - the minimum threshold that moves the needle in a large Texas sanctuary. 2-inch thick fiberglass or mineral wool panels