Flanking sound transmission via ventilation ducts and shafts
| Measurement |
Normalized flanking level difference (German “Schachtpegeldifferenz”) |
| Standard |
DIN 52210
|
| Measurement object |
Ventilation ducts and shafts, exhaust systems, components of ventilation systems |
Technical data
| Floor area (both rooms) |
20 m² |
| Room volume (2 rooms) |
70.6 m³ and 50.0 m³ |
| Entrance doors (H × W) |
2.18 × 0.83 m and 2.02 × 1.95 m |
| Size of mounting place |
Variable cross-section of ducts and shafts |
Special feature
| Max. sound reduction (related to the size of test sample) |
Dw ≥ 55 dB
|
Fraunhofer Institute for Building Physics