Free tool · Sizes your treatment
Room-acoustic design studio
Build up your room surface by surface, set a target for how it is used, and enter your panel's tested αw. You get the reverberation now, the target to aim for, and the panel area and count to get there — plus which range fits. An indicative design, not a specification, and never a claim to soundproof.
To reach 0.6s, add roughly:
at αw 0.60, using slat wall panels at 1.44 m² each. Add a margin for cuts and offsets. Browse slat wall panels or order samples.
An indicative design, not a specification.This uses Sabine's equation (RT60 = 0.161 · V / A) with typical published absorption values for each surface — a screening estimate to size treatment and choose a direction. Real specification uses per-frequency measured data (αwto EN ISO 11654 from ISO 354 tests) at the actual mounting, and for a regulated space such as a BB93 classrooma qualified acoustician should model it. Enter your panel's own tested αwabove — we don't assume one. And remember this is about absorption within the room: it reduces reverberation and echo, it does not soundproof against noise passing between rooms.
How this works
The studio estimates your room's current reverberation from each surface's typical absorption, then works backwards from a target reverberation time to the extra absorption you need — and divides that by your panel's αwto give an area, and by a panel's coverage to give a count. It is the same physics as the reverberation calculator, taken a step further into a per-surface, product-aware plan. To understand the target, see what reverberation time you need and how many panels you need.
One honest limit runs through it: absorption controls sound within a room. It will not stop noise passing to the next room — that is soundproofing, a matter of mass and construction. When you have a direction, order samples to check the finish, or send us your project for room-by-room guidance.
Frequently asked questions
Is this an acoustic design I can build from?
No — it is an indicative screening tool. It uses Sabine's equation with typical published absorption values for each surface to size a treatment and point you at the right product. A real specification uses per-frequency measured data at the actual mounting, and for a regulated space such as a BB93 classroom a qualified acoustician should model the room.
Where does the panel αw come from?
You enter it. The αw is a property of the specific panel build-up, measured to EN ISO 11654 from ISO 354 tests and stated on the panel's test report. We never assume an αw for a product — you supply the tested figure, and the tool sizes the area and count from it.
Will the panels the tool recommends soundproof my room?
No. This tool sizes absorption, which reduces reverberation and echo within the room — how the space sounds to the people in it. It does not stop sound passing between rooms; that is sound insulation, a matter of mass and construction, not an absorptive finish. If your problem is noise through a wall or floor, panels are not the answer.
How accurate is the panel count?
Treat it as a starting quantity, not a cutting list. It divides the extra absorption you need by your panel's αw to get an area, then divides by the coverage of one panel — so it depends on the αw you enter and the typical surface values chosen. Add a margin for cuts and offsets, and confirm against measured data for anything critical.