Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Rockwool blanket, 4 inch thick batt (Full-Thick), covered with 3/16 inch thick perforated cement asbestos board (Transite), 11% open area, mounted over 2 inch air space
PTB reference data
Original description
Rockwool blanket, 4 inch thick batt (Full-Thick), covered with 3/16 inch thick perforated cement asbestos board (Transite), 11% open area, mounted over 2 inch air space
Material properties
Thickness: 101.6 mm
Wall distance: 50.8 mm
Perforation: 11%
Backing: 4.76 mm thick perforated cement asbestos board (Transite)
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.78
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.60 | 0.90 | 1.00 | 0.90 | 0.70 | 0.60 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Method (354): Measured