Fraunhofer Institute for Building Physics IBP
Acoustic semi-anechoic chamber (wall of sound absorbers) for measuring the sound pressure level and directional response pattern of a sound source.
Sound pressure level in a semi-anechoic chamber
Acoustics
How to achieve peak acoustic performance: Precision and expertise in Fraunhofer IBP's semi-anechoic chamber
At Fraunhofer IBP in the Acoustic Department's acoustically optimized semi-anechoic chamber, you have the opportunity to carry out precise sound measurements under optimal conditions. This chamber simulates the acoustic conditions of a free field above a reflecting plane and makes it possible to accurately determine the radiated sound power and directional characteristics of sound sources. Thanks to the special sound-absorbing materials that line the walls and ceilings, reflections are minimized, and an authentic free field is created.
Our facility is particularly suitable for conducting sound measurements in accordance with the standards DIN EN ISO 3744 and DIN EN ISO 3745. What's more, the connection to an adjacent reverberation chamber allows experiments to be carried out on partitioning elements and wall ducts. With a large number of floor openings, we can perform interference-free tests on sources with supply and exhaust air openings. Benefit from our extensive expertise and state-of-the-art equipment designed to meet your acoustic requirements efficiently and reliably.
By working with Fraunhofer IBP, you gain access to a globally-recognized competence center for acoustics. Our testing facilities not only offer technical excellence, but also allow you to carry out precise and standardized acoustic measurements that significantly improve your product development. With us as your partner, you benefit from tailor-made solutions and a better market position thanks to the optimized acoustic quality of your products.
How can we help? Find out more about our range of services now or send us an e-mail.
| Measurement | Sound pressure level (averaged values and statistical analysis), directional pattern of sound sources |
| Measurement object | Machinery and equipment, ventilation and air-conditioning systems, especially large measuring objects |
Technical data
| Free room size (L × W × H) | 19,43 × 5,25 × 6,17 m |
| Room volume | 629 m3 |
| Entrance door (H × W) | 1,90 × 2,37 m |
Special features
| Connection to a reverberation room | Measurement of sound insulation and sound absorption of elements between reverberation and anechoic room |
| Size of the connecting door (measuring surface) | 3,8 × 2,35 m |
More information
- Vibrational isolation by using “Omega Clamps” to suppress influence due to structure-borne sound
- Lower cut-off frequency 125 Hz (according to standard)