Meeting Room Acoustic Design to ISO 3382-1:2009
Meeting rooms require controlled reverberation for clear face-to-face and video-conference communication. The small volume and hard glass partitions common in modern offices make them prone to excessive reverberation and poor speech clarity.
Under ISO 3382-1:2009, a meeting room of 60-100 m³ (typical dimensions 6m × 4m × 2.8m) requires an RT60 of ≤ 0.6s at 500-2000 Hz. A minimum STI of 0.6 is required for speech intelligibility. ISO 3382-2:2008 provides the measurement methodology for reverberation time in ordinary rooms including meeting rooms.
Specific Requirements
| Parameter | Target | Clause Reference | Notes |
|---|---|---|---|
| Frequency Range | 500-2000 Hz | — | Octave bands for compliance assessment |
Step-by-Step Compliance Calculation
- 1
Select measurement method
Use interrupted noise or impulse response method per ISO 3382-2 clause 5 for meeting room RT60 measurement.
- 2
Set up source-receiver grid
Position source at typical speaker location. Distribute receivers across seating positions, minimum 3 per room.
- 3
Measure T20/T30
Record decay at 125-4000 Hz octave bands. Report T20 or T30 depending on signal-to-noise ratio available.
- 4
Report per ISO 3382-2
Document room conditions, measurement equipment, positions, and spatially-averaged results.
Recommended Materials
| Surface | Material Category | Min NRC | Coverage % |
|---|---|---|---|
| Ceiling | Mineral wool ceiling tile | 0.85 | 80% |
| Walls | Acoustic panel | 0.75 | 30% |
Browse the full acoustic materials database for absorption coefficients and product specifications.
Common Failure Modes
⚠️Non-standard measurement positions
Measurements taken at a single position do not satisfy ISO 3382-2 requirements for spatial averaging.
⚠️Background noise contamination
RT60 measurements taken with HVAC running can produce inaccurate results due to noise floor limitations.
Frequently Asked Questions
What RT60 does ISO 3382-1:2009 require for a meeting room?
ISO 3382-1:2009 requires a reverberation time of ≤0.6s at 500-2000 Hz for meeting room spaces. ISO 3382-2:2008 provides the measurement methodology for reverberation time in ordinary rooms including meeting rooms. Parameters including T20 and T30 are measured at octave bands. The standard also informs STI prediction models used in IEC 60268-16 for assessing speech intelligibility in conference spaces.
Does ISO 3382-1:2009 set a background noise limit for a meeting room?
ISO 3382-1:2009 does not specify a background noise limit specifically for meeting room spaces. For noise criteria, refer to complementary standards such as BS 8233 or ASHRAE Handbook Chapter 49, which provide recommended background noise levels for this room type.
How much acoustic treatment does a meeting room need to comply with ISO 3382-1:2009?
A typical meeting room (60-100 m³) requires Mineral wool ceiling tile (NRC ≥0.85) covering 80% of the ceiling as the primary treatment. Additional wall absorption on 1 surface(s) is typically needed. Use the AcousPlan calculator with the pre-loaded dimensions (6m × 4m × 2.8m) to calculate the exact absorption deficit for your room.
Calculate ISO 3382-1:2009 Compliance for Your Meeting Room
Pre-loaded with typical meeting room dimensions (6m × 4m × 2.8m) and an RT60 target of 0.6s per ISO 3382-1:2009. Enter your actual dimensions, select materials, and verify compliance instantly.
Open Calculator with PresetRelated Guides
Meeting Room under other standards
ISO 3382-1:2009 for other room types
Further Reading
Complete meeting room acoustic design guide with all applicable standards, failure modes, and material recommendations.
Full ISO 3382-1:2009 standard overview: scope, key clauses, all room type requirements, and implementation guidance.
Browse 5,000+ acoustic materials with absorption coefficients, NRC ratings, and specifications from 115 manufacturers.
In-depth guides on RT60 calculation, acoustic treatment design, and compliance methodology.