Meeting Room Acoustic Requirements Under BS 8233:2014
Conference rooms, boardrooms, video conferencing spaces. Typical volume: 30-150 m³.
What BS 8233:2014 Requires for a Meeting Room
Clause reference: BS 8233:2014 Table 4
RT60 target: ≤ 0.6s
Background noise limit: ≤ 35 dBA
Measurement condition: Furnished
How to Calculate BS 8233:2014 Compliance for a Meeting Room
- 1
Identify the applicable standard and target
Look up BS 8233:2014 (BS 8233:2014 Table 4). For a meeting room, the RT60 target is ≤ 0.6s. Measurement condition: furnished.
- 2
Measure or model the room geometry
Record the length, width, and height of the room to calculate the volume. A typical meeting room has a volume of 30-150 m³.
- 3
List all surfaces and their absorption coefficients
For each surface (floor, ceiling, walls, windows, doors), find the absorption coefficient at each octave band frequency (125Hz to 4kHz) from ISO 354 test data or a materials database.
- 4
Calculate total absorption and apply the Sabine or Eyring equation
Sum all surface absorption values: A = sum of (alpha x area). Then apply T60 = 0.161 x V / A (Sabine) or T60 = -0.161 x V / (S x ln(1 - alpha_avg)) (Eyring). Use Eyring when average alpha exceeds 0.20.
- 5
Compare result against the standard and specify treatment if needed
If the calculated RT60 exceeds the target of ≤ 0.6s, specify additional absorption. 10-16 m² is typical for a meeting room to achieve compliance.
Typical Acoustic Treatment for a Meeting Room
Treatment Area
10-16 m²
Estimated Cost
£3,500-£7,000 installed
Meeting Room: BS 8233:2014 vs Other Standards
| Requirement | BS 8233:2014 | WELL v2 Feature 74 |
|---|---|---|
| RT60 Target | ≤ 0.6s | ≤ 0.6s |
| STI Target | Not specified | ≥ 0.60 |
| Background Noise | ≤ 35 dBA | ≤ 35 dBA |
| Measurement | Furnished | Furnished |
Frequently Asked Questions
What RT60 does BS 8233:2014 require for a meeting room?
BS 8233:2014 (BS 8233:2014 Table 4) requires a reverberation time of ≤ 0.6s for meeting room spaces, measured in the furnished condition per ISO 3382-2.
What background noise level is acceptable in a meeting room under BS 8233:2014?
BS 8233:2014 sets a background noise limit of ≤ 35 dBA for meeting room spaces. This typically refers to HVAC and building services noise measured with the room unoccupied.
How much acoustic treatment does a meeting room need to comply with BS 8233:2014?
A typical meeting room requires 10-16 m² of acoustic treatment to meet BS 8233:2014 compliance. Estimated installed cost is £3,500-£7,000 installed.
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