Fraunhofer Institute for Building Physics IBP
Kanal des Schalldämpfer-Prüfstands mit Schallquelle aus Sicht des Senderaums.
Insertion loss, pressure loss, flow noise of silencers and mufflers
Acoustics
| 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
| Test duct (L × H) | 12,0 m × 0,5 m |
| Width of the test duct | 500 to 1300 mm (50 mm steps) |
| Fan | Flow rate ≤ 35 m3/s, pressure difference ≤ 2500 Pa |
| Max. size of test samples (L × H) | 6,000 m × 0,498 m |
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