Acoustic panel placement: where to mount wall panels and ceiling clouds

Buying panels is easy. Putting them in the right place is what makes a room sound better. The same number of panels can make a dramatic difference or almost none, depending on where they go.

Start with the problem

• Echo and boominess in meeting rooms and halls: the room has too little absorption overall.
• Harsh or blurred sound in studios: early reflections reach the listener just after the direct sound.
• Flutter echo: a ringing sound between two parallel hard walls.
• Weak or uneven bass: low frequencies build up in corners.

The mirror trick for first reflections

Sit in the listening or speaking position. Ask someone to slide a mirror along the side wall at ear height. Wherever you can see a loudspeaker, or the person who will speak, in the mirror, mark the wall. That is a first reflection point and the best place for a panel. Repeat on the other side wall and on the ceiling.

Placement by surface

Layouts by room type

• Meeting rooms: a ceiling cloud or acoustic ceiling over the table, plus panels on the wall opposite the screen and on any solid side wall. Spread panels around rather than grouping them on one wall. A common starting point is to treat about a quarter of the wall area, then adjust after listening.
• Studios and control rooms: side-wall and ceiling reflection points, corner bass traps, and a treated rear wall. Keep the layout symmetrical.
• Classrooms and lecture halls: absorb the rear wall to stop echo back to the teacher, and use an absorbent ceiling. See our classroom acoustics checklist.
• Auditoriums: treatment is set by the reverberation target for speech or music. See reverberation time and speech clarity.

Thickness and mounting

Thin panels mainly absorb high frequencies. Thicker panels, or panels mounted with an air gap behind, work lower down. For speech rooms, 25 mm to 50 mm fabric-wrapped mineral wool or PET panels on battens are common choices. See acoustic panels and materials for the finishes we install.

Common mistakes with acoustic panels

• All panels on one wall: a single treated wall leaves the other surfaces reflecting. Spread the treatment across opposing surfaces.
• Panels too high or too low: side-wall panels should cover the height where reflections reach the listener, usually around seated ear height.
• Ignoring the ceiling: in meeting rooms the reflection between the table and the ceiling is one of the strongest. A cloud above the table often helps more than another wall panel.
• Using thin foam for bass problems: thin panels absorb high frequencies only. Bass needs thicker absorbers in corners or panels with an air gap.
• Treating echo when the problem is noise from next door: panels do not block sound. If you hear the next room, see our guide to commercial soundproofing materials and STC ratings.
• Choosing by colour alone: the finish matters, but check the absorption data too. Our guide to NRC explained shows how to read it.

How to choose panels for your room

• Fabric-wrapped mineral wool: high absorption across speech frequencies, many colours, good for meeting rooms, studios and auditoriums.
• PET felt panels: light, tough and easy to shape, popular in offices, classrooms and reception areas.
• Timber slat panels: a warm finish with absorbent backing, used in boardrooms, halls and receptions.
• Ceiling clouds and baffles: for rooms with hard ceilings or exposed slabs, and for open-plan floors. See open-plan office noise reduction.
• Bass traps: thick corner absorbers for studios, control rooms and home cinemas.

Also check fire performance, humidity resistance and how easy the finish is to clean, especially in schools, hospitals and busy public areas.

What a site survey checks

• Room size, shape and ceiling height.
• Hard surfaces: glass, plaster, tiles, stone and exposed concrete.
• Where people sit and speak, and where loudspeakers, screens and microphones are placed.
• Reverberation, measured or estimated, compared with a typical target for the room’s use.
• Fixing surfaces, services in the walls and ceiling, and any lighting or sprinkler layout the panels must work around.

Step by step: planning a panel layout

1. Define the use: speech, music, video calls, teaching or recording.
2. Set a target: a typical reverberation time for that use and room size.
3. Work out the amount of absorption needed, using product absorption data.
4. Place the first panels at the reflection points found with the mirror trick, and on the ceiling above the main positions.
5. Add the rest on rear walls and opposing parallel surfaces, spreading treatment around the room.
6. Check the look with the interior designer: alignment with doors, windows, lights and furniture.
7. Install and listen, then adjust if needed.

Applications by building type in Pakistan

• Glass meeting rooms and boardrooms: ceiling treatment and panels on solid walls. See how to fix echo in a glass-walled meeting room.
• Classrooms and lecture halls: rear wall and ceiling absorption so students at the back can follow the teacher.
• Studios and control rooms: symmetrical treatment at reflection points, bass traps and a treated rear wall. See TV studio acoustics.
• Restaurants and cafés: ceiling and wall panels to bring the overall noise down so tables can talk.
• Auditoriums and multipurpose halls: treatment set by the use, with a balance of absorption and diffusion.

Quick checklist before a survey

• Photos of each wall and the ceiling, and the room dimensions.
• What the room is used for, and the main complaint: echo, harsh sound or boomy bass.
• Where people sit and where the screen, loudspeakers or instruments are.
• Any colours, finishes or brand elements the panels should match.

With these, we can often suggest a first layout before the visit and confirm it on site.

Absorption or diffusion?

Absorbers soak up sound energy; diffusers scatter it in many directions. Small rooms such as meeting rooms, offices and voice booths mostly need absorption, because there is not enough distance for scattered sound to blend. Larger rooms such as control rooms, music rooms and halls often benefit from some diffusion on the rear wall, which keeps the room lively without strong echoes. Getting the balance right is part of the layout design.

Frequently asked questions

How many acoustic panels do I need?

It depends on the room size, finishes and use. A common starting point for a meeting room is about a quarter of the wall area plus a ceiling cloud, but a short survey gives a better answer.

At what height should panels be mounted?

Centre side-wall panels around ear height for the main position: about seated ear height in meeting rooms and studios.

Should panels go on the ceiling?

Yes, in most rooms. The ceiling is a large reflecting surface and a cloud over the table or desk is one of the most effective treatments.

Do panels stop noise from next door?

No. Panels control echo inside the room. Blocking noise needs soundproofing.

Can panels go on glass?

Not usually, as glass is kept clear for light. In glass rooms we treat the ceiling, solid walls and floor instead, which is normally enough.