RT60 Targets for Conference Rooms (by Room Volume and Use Case)
RT60 targets are not one-size-fits-all. The right target depends on room volume and meeting use. This guide gives practical target bands for teams managing many hybrid rooms.
Who this guide is for: IT managers and facilities leaders managing 10-100 conference rooms in hybrid meeting environments.
Trust note: Keep measured values and inferred guidance separate when deciding room fixes.
Set RT60 by room size
Smaller rooms usually need lower RT60 than larger rooms.
A 0.8 second decay may be acceptable in a large room, but problematic in a small huddle space.
- Small rooms (under 30 m3): target 0.25-0.45s
- Medium rooms (30-150 m3): target 0.40-0.65s
- Large rooms (150+ m3): target 0.55-0.90s
Adjust for hybrid use
Hybrid meetings are less forgiving than in-room conversations.
Remote participants hear only what the mic captures. In remote-heavy rooms, target the lower half of each RT60 range.
Avoid false precision
Use RT60 as a directional KPI with confidence scoring.
A repeatable range and trend line matter more than pretending every reading is lab-grade.
FAQ
What RT60 is too high for Zoom Rooms?
For most speech-focused Zoom Rooms, sustained values above about 0.8s often create clarity complaints and listening fatigue.
Should we target the same RT60 in every room?
No. Target by volume and use case, then calibrate based on observed call quality outcomes.
Can furniture changes move RT60 noticeably?
Yes. Added soft furniture, panels, or curtains can shift RT60 enough to improve speech intelligibility.
Related Guides
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