🎵ISO 3382-1:2009 · International

Concert Hall Acoustic Design to ISO 3382-1:2009

Concert halls represent the pinnacle of acoustic design, requiring simultaneous optimisation of seven ISO 3382-1 parameters. The target RT60 of 1.

TL;DR

Under ISO 3382-1:2009, a concert hall of 6,000-10,000 m³ (typical dimensions 35m × 22m × 14m) requires an RT60 of 1.8–2.2s at 500-1000 Hz. ISO 3382-1:2009 is the definitive international standard for concert hall acoustics.

RT60 Target

1.8–2.2s

Noise Limit

N/A

STI Minimum

N/A

Frequency Range

500-1000 Hz

Specific Requirements

Parameter	Target	Clause Reference	Notes
Reverberation Time (RT60)	1.8–2.2s	—	500-1000 Hz, Unoccupied, informative Annex A values for symphony halls
Frequency Range	500-1000 Hz	—	Octave bands for compliance assessment

Step-by-Step Compliance Calculation

1
Define ISO 3382-1 parameter targets
Set targets for all seven parameters: RT60 1.8-2.2s, EDT close to RT60, C80 -2 to +2 dB, LF 0.15-0.35, etc.
2
Design hall geometry
Shape volume for target parameters. Shoebox halls favour LF and IACC; vineyard halls favour G uniformity.
3
Model acoustic response
Use ray-tracing or image-source software to predict all ISO 3382-1 parameters at the measurement grid positions.
4
Construct and commission
Measure all seven parameters per ISO 3382-1 clause 5 using at least 6 source and 12 receiver positions.
5
Report and benchmark
Compare measured values to published data from world-class halls. Document in ISO 3382-1 compliant format.

Recommended Materials

Surface	Material Category	Min NRC	Coverage %
Walls	Heavy masonry with diffusion	0.05	65%
Ceiling	Shaped reflective panels	0.08	70%
Audience	Upholstered seating	0.75	100%

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

Common Failure Modes

⚠️Poor IACC uniformity

Wide fan-shaped halls produce low lateral energy at centre seats, reducing the spatial impression and envelopment.

⚠️EDT/RT60 mismatch

If EDT is significantly shorter than RT60, the hall sounds less reverberant than measured RT60 suggests.

⚠️Insufficient Strength G at rear

Sound level drops excessively at distant seats in halls wider than 22m, requiring additional early reflections.

Frequently Asked Questions

What RT60 does ISO 3382-1:2009 require for a concert hall?

ISO 3382-1:2009 requires a reverberation time of 1.8–2.2s at 500-1000 Hz for concert hall spaces. ISO 3382-1:2009 is the definitive international standard for concert hall acoustics. It defines seven key parameters: RT60, EDT, Clarity C80, Definition D50, Strength G, Lateral Fraction LF, and Inter-Aural Cross-Correlation IACC. Measurement requires omnidirectional and figure-of-eight microphones at multiple positions.

Does ISO 3382-1:2009 set a background noise limit for a concert hall?

ISO 3382-1:2009 does not specify a background noise limit specifically for concert hall 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 concert hall need to comply with ISO 3382-1:2009?

A typical concert hall (6,000-10,000 m³) requires Shaped reflective panels (NRC ≥0.08) covering 70% 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 (40m × 22m × 15m) to calculate the exact absorption deficit for your room.

Calculate ISO 3382-1:2009 Compliance for Your Concert Hall

Pre-loaded with typical concert hall dimensions (40m × 22m × 15m) and an RT60 target of 2s per ISO 3382-1:2009. Enter your actual dimensions, select materials, and verify compliance instantly.

Open Calculator with Preset