Fraunhofer Institute for Building Physics IBP
Test tunnel of the silencer testing facility with sound source as seen from the transmitter room.
Insertion loss, pressure loss, flow noise of silencers and mufflers
Acoustics
Maximum efficiency in silencer testing: Your path to optimized ventilation and process air technology
Our state-of-the-art testing facilities at Fraunhofer IBP are specially designed to provide advanced solutions in silencer and component testing. We perform standardized measurements in compliance with DIN EN ISO 7235 to precisely analyze the insertion loss, sound power and pressure losses of your products. Equipped with both rectangular and round test tunnels, our facilities enable us to carry out comprehensive tests on silencers and other components used in ventilation and process air systems. The tests we carry out ensure that your products are developed with the highest quality and efficiency, so you can be certain that your solutions meet the strictest international standards. Our dedicated team of acoustic experts works closely with customers to develop tailored solutions designed to meet their specific requirements. Put your trust in our expertise and commitment to innovation to take your silencers and components to the next level.
By working with us, you benefit from first-class research and state-of-the-art technology that will advance your products to new heights. Our test facilities not only deliver precise measurements but also help you comply with international standards, increasing your market opportunities. Direct access to our experienced team in the Department of Acoustics ensures that your specific needs are understood and met. You can depend on Fraunhofer IBP to make your silencers and components more efficient and powerful.
How can we help? Find out more about our range of services now or send us an e-mail.
| Measurement | Insertion loss, sound power, pressure loss |
| Standard | DIN EN ISO 7235 |
| Measurement object | Silencers as splitters, ducted silencers, special construction of silencers, ventilation and air-conditioning components, (filters, heat exchangers, etc.) |
Technical data
| Rectangular test tunnel (L× H) | 12 m × 0.5 m |
| Width of rectangular test tunnel | 500 to 1300 mm (50mm increments), special structures possible |
| Round test tunnel (DN) | n 400 mm n 200 mm ≥ DN ≤ 800 mm standard measurement Other diameters based on the standard |
| Fan | n Volume flow ≤ 35 m³/s Pressure difference ≤ 2500 Pa |
| Max. size rectangular test tunnel (L x H) | 6000 mm x 498 mm |
| Max. size round test tunnel | 6000 mm long, DN 1200 mm and 6 tons in weight |
Special feature
| Type of test facility | Wind tunnel with closed loop ventilation duct |
More information
- Special sound source (loudspeaker wall, 2800 W) for uniform radiation into the test duct
- Continuously adjustable air flow speed
- Uniform and noiseless air flow
- Sound power measurement in the receiving room out of the air flow
- Stationary measuring system for static and dynamic pressure