What usually goes wrong
- Students at the back miss what the teacher says.
- The room gets noisy during group work.
- Teachers strain their voices.
The main noise sources are the teacher, students and equipment. Sound bounces off hard walls, floors and ceilings, so it lingers and builds up. Absorbing panels soak up those reflections.
Where the panels go
- On the back wall, which reflects the teacher's voice back as echo.
- High-NRC ceiling tiles over the whole room.
- Upper side walls, above where chairs and hands hit.
Mistakes to avoid
- Putting panels behind the teacher where they reduce the useful early reflections.
- Using soft fabric low on walls where it gets damaged.
Fire rating and codes
Educational occupancy: wall and ceiling finishes generally must be Class A, and ANSI/ASA S12.60 sets a 0.6 s limit for core learning spaces under 10,000 ft³.
Blocking sound between rooms
Panels make a room sound better, but they don’t stop sound passing through a wall. For that you need a wall assembly rated around STC 50, ANSI/ASA S12.60 calls for STC 50 between classrooms. Read about STC ratings and soundproofing.
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14 guides for classrooms
Acoustic panels for classrooms: the complete guideWhat makes classrooms noisy, which panels fix it, and how to plan treatment from start to finish.How many acoustic panels does a classroom need?A worked Sabine calculation for a typical classroom, with panel counts for small, typical and large rooms.Where to put acoustic panels in a classroomWhere panels do the most good in classrooms, in priority order.Wall acoustics for classroomsHow walls behave acoustically in classrooms and how to treat them with panels.Ceiling acoustics for classroomsClouds, baffles and ceiling tiles for classrooms, and how much of the ceiling to cover.Choosing panel thickness for a classroom1, 2 or 4 inches: which thickness suits classrooms and why.Reverberation time targets for classroomsThe reverberation time to aim for in classrooms, and why it matters.What acoustic treatment costs for a classroomBudget estimates for treating a typical classroom, and where the money goes.Fabrics, colors and shapes for classroomsFabric types, colors and shapes that work in classrooms.Fire ratings and code requirements for panels in classroomsFire ratings, occupancy rules and mounting requirements for panels in classrooms.Installing acoustic panels in a classroomTools, hardware and step-by-step installation for panels in classrooms.Common acoustic mistakes in classroomsThe errors we see most often in classrooms, and how to avoid them.Soundproofing and STC ratings for classroomsWhen classrooms need soundproofing, which STC rating to aim for, and how to get there.Classroom acoustics checklist and FAQA one-page checklist and answers to common questions about classroom acoustics.