Fraunhofer Institute for Building Physics IBP
Entrance to the air-conditioned semi-anechoic chamber for measuring the sound power and directional response, e.g. of air conditioners and heat pumps.
Sound power in a semi-anechoic chamber
Acoustics
Precise acoustic measurements in variable environments
Our two acoustic semi-anechoic chambers provide optimal conditions for conducting precise sound measurements. In the first chamber, specially designed for measuring sound power and directional characteristics, you benefit from an environment that is acoustically optimized to simulate the conditions of a free field. The second chamber is also temperature-resistant, making it particularly advantageous when it comes to measuring the noise generated by heat pumps and air-conditioning units. This adaptability makes it possible to test acoustic performance under different climatic conditions, ensuring realistic and practical results.
By using our state-of-the-art test chambers, which are certified to the highest standards, you can be sure of precise and reliable measurement results. Our many years of experience in acoustic research and our ability to individually adapt test conditions offer you a clear competitive advantage. Experience the difference that tailor-made acoustic solutions can make to optimize your products and meet your customers’ requirements.
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| Measured variables | Sound power (enveloping surface method), sound intensity, sound source localization |
| Norms | DIN EN ISO 3745, DIN EN ISO 3744 |
| Test objects | Machines, devices and systems as well as other sources of noise with a volume of up to 1 m³ |
Technical data
| Chamber 1 | Chamber 2 | |
| Available space (L x W x H) | 19.43 m x 5.25 m x 6.17 m | 7.55 m x 4.45 m x 5.68 m |
| Chamber volume | 629 m3 |
191 m3 |
| Entrance door (H x W) | 1.90 m x 2.37 m | 2.40 m x 1.58 m |
| n Special feature: | Connection to a reverberation chamber: Measurement of sound insulation and sound absorption of components between reverberation chamber and anechoic chamber | Temperature-resistant for measurements in different climatic conditions |
| Sliding door to reverberation chamber (measuring area): 3.80 m x 2.35 m | Measurements of air-to-water heat pumps |
More Information
- Lower cut-off frequency (see sketch)
- Room ventilation only active when door is open
- Sound sources can be installed flush with the floor
- Semi-anechoic chamber Accuracy Class 1 according to DIN 45635, Part 1