Fraunhofer Institute for Building Physics IBP
Akustischer Halb-Freifeldraum (Wand aus Schallabsorbern) zur Messung des Schalldruckpegels und Richtcharakteristik einer Schallquelle.
Sound pressure level in a semi-anechoic chamber
Acoustics
| Measurement | Sound pressure level (averaged values and statistical analysis), directional pattern of sound sources |
| Measurement object | Machinery and equipment, ventilation and air-conditioning systems, especially large measuring objects |
Technical data
| Free room size (L × W × H) | 19,43 × 5,25 × 6,17 m |
| Room volume | 629 m3 |
| Entrance door (H × W) | 1,90 × 2,37 m |
Special features
| Connection to a reverberation room | Measurement of sound insulation and sound absorption of elements between reverberation and anechoic room |
| Size of the connecting door (measuring surface) | 3,8 × 2,35 m |
More information
- Vibrational isolation by using “Omega Clamps” to suppress influence due to structure-borne sound
- Lower cut-off frequency 125 Hz (according to standard)