How Many Panels do I Need?
We've developed a simple calculator to assist you with calculating the current reverb time within your space, and the impact acoustic panels can have.
Acoustic Calculator
Estimate your room's reverberation time before and after acoustic treatment, and see what a difference the right panels can make.
Room dimensions
Enter the length, width and height of the room, plus the total area of any doors and windows. We'll work out the rest.
What is the room made of?
The materials on your floor, walls, ceiling, doors and windows determine how much sound is absorbed — and how much bounces around.
Apply Sonio acoustic treatment
Choose a wall panel or ceiling raft from our range, then pick how much of each surface to cover. 30%–50% coverage is usually enough to make a real difference.
Wall treatment
Ceiling treatment
Your acoustic results
Recommended reverberation times by space
Different spaces need different acoustic conditions. These target ranges come from Resonics — our sister company and the UK's leading acoustic installation specialist — based on over a decade of acoustic treatment projects across offices, schools, restaurants, and public buildings.
| Room type | Suggested RT |
|---|---|
| Open plan office | < 1.0 second |
| Enclosed office | < 0.6 seconds |
| Meeting room | 0.6 – 0.8 seconds |
| AV / VC room | < 0.5 seconds |
| Primary / nursery classroom | < 0.6 seconds |
| Secondary school classroom | < 0.8 seconds |
| Lecture hall | < 1.0 second |
| Theatre / auditorium | 1.5 – 2.0 seconds |
| Assembly hall | 0.8 – 1.2 seconds |
| School corridor / stairwell | < 1.5 seconds |
| Dining room / canteen | < 1.0 second |
| Restaurant | < 1.0 second |
| Church / village hall | < 1.5 seconds |
| Library | < 1.0 second |
| Swimming pool | < 2.0 seconds |
| Call centre | < 0.8 seconds |
| Cinema | 0.8 – 1.2 seconds |
| Sports hall | < 1.5 seconds |
These figures are the Resonics recommended ranges for achieving acoustic comfort and clarity, developed from a decade of in-field acoustic treatment work. Exact targets vary by room size and use. Read the full Resonics Guide to Reverberation Time for more detail, or request a free acoustic survey from the Resonics team.