Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Rockwool blanket, 2 inch thick batt (Semi-Thik), 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, 2 inch thick batt (Semi-Thik), covered with 3/16 inch thick perforated cement asbestos board (Transite), 11% open area, mounted over 2 inch air space
Material properties
Thickness: 3/16 inch (Transite), 2 inch (Rockwool)
Wall distance: 2 inch
Perforation: 11%
Backing: 2 inch Rockwool blanket
Surface: perforated cement asbestos board (Transite)
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.67
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.65 | 1.00 | 0.90 | 0.60 | 0.50 |
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Method (354): Measured