📊DIN 18041:2016 · Germany

Meeting Room Acoustic Design to DIN 18041:2016

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.

TL;DR

Under DIN 18041:2016, a meeting room of 60-100 m³ (typical dimensions 6m × 4m × 2.8m) requires an RT60 of ≤ 0.5s at 500-2000 Hz. Background noise must not exceed 35 dBA. A minimum STI of 0.65 is required for speech intelligibility. DIN 18041:2016 classifies meeting rooms as Group A (speech communication).

RT60 Target

≤ 0.5s

Noise Limit

35 dBA

STI Minimum

≥ 0.65

Frequency Range

500-2000 Hz

Specific Requirements

Parameter	Target	Clause Reference	Notes
Reverberation Time (RT60)	≤ 0.55s	—	250-2000 Hz, Furnished, unoccupied, Group A3 at 100 m³
Background Noise Limit	≤ 35 dBA	—	HVAC + building services, unoccupied
Speech Transmission Index (STI)	≥ 0.6	—	Per IEC 60268-16:2020
Frequency Range	500-2000 Hz	—	Octave bands for compliance assessment

Step-by-Step Compliance Calculation

1
Classify as Group A
Confirm meeting room falls in DIN 18041 Group A for speech communication. Set Quality Class A targets.
2
Target RT60 <= 0.5s
Calculate absorption for 0.5s target at 500-2000 Hz. This typically requires ceiling plus 30-40% wall treatment.
3
Verify STI >= 0.65
Model STI at worst-case positions. Ensure early reflections from ceiling support speech reinforcement.
4
Address table reflections
Use table pads, acoustic table mats, or angled ceiling reflectors to manage specular reflections from large tables.
5
Commission per DIN 18041
Measure RT60 and STI in furnished, unoccupied condition per DIN 18041 measurement methodology.

Recommended Materials

Surface	Material Category	Min NRC	Coverage %
Ceiling	Mineral wool ceiling tile	0.90	85%
Rear and side walls	Fabric-wrapped absorber	0.85	40%
Floor	Carpet	0.30	100%

Browse the full acoustic materials database for absorption coefficients and product specifications.

Common Failure Modes

⚠️Insufficient STI at far positions

Even with correct RT60, poor early reflection design can produce STI below 0.65 at positions opposite the speaker.

⚠️Conference table reflections

Large polished conference tables create a strong specular reflection that degrades speech clarity for distant participants.

Frequently Asked Questions

What RT60 does DIN 18041:2016 require for a meeting room?

DIN 18041:2016 requires a reverberation time of ≤0.5s at 500-2000 Hz for meeting room spaces. DIN 18041:2016 classifies meeting rooms as Group A (speech communication). Quality Class A requires RT60 <= 0.5s with STI >= 0.65 at all listener positions. The German ASR A3.7 workplace regulation supplements this with specific conference room noise requirements.

What is the maximum background noise level for a meeting room under DIN 18041:2016?

DIN 18041:2016 sets a maximum background noise level of 35 dBA for meeting room spaces. This includes noise from HVAC systems, building services, and external intrusion, measured with the room unoccupied. Exceeding this limit degrades speech intelligibility and occupant comfort.

How much acoustic treatment does a meeting room need to comply with DIN 18041:2016?

A typical meeting room (60-100 m³) requires Mineral wool ceiling tile (NRC ≥0.9) covering 85% of the ceiling as the primary treatment. Additional wall absorption on 2 surface(s) is typically needed. Use the AcousPlan calculator with the pre-loaded dimensions (6m × 4m × 2.9m) to calculate the exact absorption deficit for your room.

Calculate DIN 18041:2016 Compliance for Your Meeting Room

Pre-loaded with typical meeting room dimensions (6m × 4m × 2.9m) and an RT60 target of 0.5s per DIN 18041:2016. Enter your actual dimensions, select materials, and verify compliance instantly.

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