Enter your room’s size and finishes to get its reverb time (RT60) and the acoustic treatment it needs to hit your target.
Room acoustics describe how sound reflects, decays, and disperses within a space — factors that directly impact speech clarity, comfort, and code compliance. Our acoustic treatment calculator uses Sabine’s Formula to estimate reverberation time (RT60) from your room’s dimensions and surface finishes, helping you determine if additional treatment is needed.
This tool applies Sabine’s Formula — a proven method for predicting reverberation time — using your room’s volume and the Noise Reduction Coefficient (NRC) of each surface. It helps architects, contractors, and designers quickly assess whether additional acoustic treatment is needed before construction or renovation.
The right reverb time depends on how a space is used. Rooms built around speech need short reverb, while music and worship spaces benefit from a little more warmth.
Speech Clarity
Balanced
Echo Control
Musical WarmthEffective acoustic design typically combines both strategies. Absorption shortens RT60 and removes harsh reflections, while diffusion keeps the room from feeling “dead” by breaking up concentrated sound energy.
Acoustic treatment projects across education, hospitality, offices, and restaurants — with the reverb results to show for it.
Diffusers + PanelsPolk State renovated its Arts & Music Building to improve clarity and manage reverberation. Ceiling diffusers, fabric panels, and scatter units balance frequencies across performance, rehearsal, and teaching spaces.
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450+ PanelsMore than 450 fabric panels and barrel diffusers were installed in the auditorium and band rooms to reduce reverberation, improve speech intelligibility, and lift performance quality.
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RT60 1.75 → 1.0sExcessive echo hurt conversation in this 55+ community’s clubhouse restaurant. A fabric wall system across all available surfaces cut RT60 from 1.75 to 1.0 seconds.
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Fabric WallHard surfaces from a remodel created echo that hurt speech clarity and client confidentiality. A seamless fabric wall system aligned with the cabinetry added absorption without breaking the design.
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RT60 1.2 → 0.7s14 custom fabric-wrapped panels across the walls, ceiling, and accent zones pulled reverb from 1.2 to 0.7 seconds — right in the window for clear conference calls.
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RT60 1.6 → <1.0sCustom panels sized to the room’s geometry cut reverb from over 1.6 seconds to under 1 second, so guests at the same table could finally hold a conversation.
Read the case study →RT60 is the standard measure of reverberation time. It tells you how echoey or controlled a space is, and affects everything from speech clarity to noise complaints.
It’s based on real-world NRC values and proven acoustic formulas. For pre-construction planning, it’s highly reliable. Final tuning may require field testing in sensitive applications.
That means your room is too reflective. You’ll need to add acoustic absorption, such as wall panels, ceiling baffles, or even carpets and drapes depending on the setting.
Ceiling treatments are most effective in large or tall rooms; wall panels are best at targeting side reflections and speech paths. Use both when possible for balanced control.