Acoustic Wall Panels: What to Check Before You Buy

Acoustic wall panels are the product most people picture when they hear acoustic treatment, and the one most often bought for the wrong job. A panel absorbs the sound that hits it instead of bouncing it back into the room. That shortens the echo and makes speech easier to follow. It does not stop sound travelling through a wall to the room next door. If you keep one thing from this guide, keep that.

What a wall panel actually does to sound

Most panels are a porous core, usually mineral wool, PET felt or foam, behind a fabric or felt face. Sound enters the material, the air inside the fibres is forced to move, and the energy turns into a very small amount of heat. What comes back into the room is quieter. Add enough of that across a room and the reverberation time drops, which is the measurement that decides whether a space feels clear or muddy. We explain that number in our guide to reverberation time (RT60).

Panels work best on the mid and high frequencies, which is where speech, laughter and cutlery live. That is why they are so effective in offices, classrooms and meeting rooms, and why they do less for the low rumble of traffic or plant.

Where wall panels work best

• Meeting rooms and video call rooms: panels behind and beside the camera stop the echo the microphone picks up. See our meeting room and conferencing room pages.
• Offices with hard, glazed walls: one or two well-placed walls of panels often do more than a scatter of small ones. See offices.
• Restaurants, cafes and reception areas: where the ceiling can't be touched, or where a feature wall doubles as branding.
• Rooms with two hard, parallel walls: treating one of them stops the fast buzzing repeat known as flutter echo (see our flutter echo guide).

The advantages, plainly

• It is the simplest retrofit. No ceiling works and no services to move.
• The range of finishes is wide, from panels that disappear into the wall colour to bold printed or colour-blocked features.
• You can aim the treatment. If the problem is the wall behind a presenter, you treat that wall.
• Absorption is measured and published, so you can compare products on evidence rather than photos.

The limits you should know before you order

• A panel only treats the area it covers. In a tall or large room, walls alone rarely reach the reverberation target, and the ceiling is usually the bigger opportunity. See acoustic ceilings: tiles, baffles or rafts.
• It is not soundproofing. If you can hear the next room, you need insulation in the wall, not panels on it. We cover the difference in soundproofing vs acoustic treatment.
• Thin panels do little in the low frequencies. If bass or plant noise is the complaint, ask about thicker panels or an air gap behind them.
• Fabric faces can fade in strong sunlight, and low panels in corridors get knocked. Choose the face for the room, not the brochure.

How panels compare with the alternatives

What to ask a supplier before you commit

1. The absorption class. Under BS EN ISO 11654, Class A means a weighted absorption coefficient (αw) of 0.90 or above. Ask for the class and the actual test report, not just a headline number.
2. Thickness and how it was tested. A 25 mm panel and a 50 mm panel behave differently, and the mounting used in the lab affects the result.
3. Fire performance. Class 0 alone no longer satisfies building control on new work. Ask for the Euroclass rating. Our fire ratings guide explains what to look for.
4. Fixing method. Adhesive or mechanical, and whether it suits your wall, plasterboard, block or concrete.
5. How many you need. Coverage should be calculated from your room volume and measured reverberation time, not a rule of thumb.

Common questions

What NRC or absorption class should I look for? It depends on the room. A busy open-plan floor needs more absorption than a small meeting room. We calculate it in the survey rather than quoting one rating for every space.

Can panels be almost invisible? Yes. They can be finished to match the wall, or specified as a deliberate feature. Both are common.

How do I know how many panels I need? From the room volume and the existing reverberation time. That is what a proper survey assesses.

Get the quantity right before you order

Buying panels by the square metre without a measured target is how rooms end up half treated. Book a free acoustic survey and we'll assess the room and give you a panel schedule, or browse our acoustic panels range.