Sound absorption in an impedance tube
| Measurement |
Sound absorption coefficient (normal sound incidence) |
| Standard |
DIN EN ISO 10534
|
| Measurement object |
Sound absorbers, suspended ceilings, wall linings, panels, fabrics, textiles, granular materials, active material systems |
Technical data
| Size of test samples |
198 × 198 mm and diameter 100 mm |
| Thickness of test samples |
max. 250 mm (including rear wall distance) |
| Further tubes and sizes |
248 × 248 mm and diameter 30 mm |
Special features
| Horizontal and vertical installation |
Sound absorption measurement of granular materials in lying position |
Anechoic termination
(measuring surface) |
248 mm × 248 mm |
Fraunhofer Institute for Building Physics