Fraunhofer Institute for Building Physics IBP
View into the reverberation chamber at Fraunhofer IBP.
Sound absorption in a reverberation room
Acoustics
Sound Absorption Measurement According to DIN EN ISO 354
In the Fraunhofer IBP reverberation chamber, the sound absorption coefficient of sound absorbers, acoustic panels, noise barriers, and suspended ceilings can be determined. Similarly, the equivalent sound absorption area of items such as mobile partition walls, seatings and other individual objects can be determined. The measurements are carried out according to DIN EN ISO 354 with diffuse sound incidence. Due to its size and construction, the reverberation chamber also offers the possibility to carry out measurements in the low-frequency range. A unique feature of the reverberation chamber is its sliding door, which allows for sound absorption measurements to be carried out under both diffuse sound incidence and free-field conditions. This flexibility makes it possible to simulate a wide range of realistic acoustic scenarios. Additionally, the reverberation chamber is equipped with a vibration-damped structure that minimizes structure-borne sound transmission, ensuring highly accurate measurement results.
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| Measurement | Sound absorption coefficient (random sound incidence) |
| Standard | DIN EN ISO 354 |
| Measurement object |
Sound absorbers, suspended ceilings, wall linings, office screens,furniture, seats, panels, textiles, fabrics, noise barriers |
Technical data
| Floor area | 60 m2 |
| Room volume | 392 m3 |
| Entrance door (H x W) | 2,40 m × 2,19 m |
Special features
| Connection to a semi-anechoic room |
Measurement of sound insulation and sound absorption of elements between reverberation and anechoic room |
| Size of the connecting door (measuring surface) | 3,8 m × 2,35 m |
More information
- Area of the test object between 12 m² and max. 18 m², aspect ratio between 0.7 and 1
- Low vibration doors with high sound reduction
- Suppressed excitation of structure-borne sound of the walls due to a special basement