Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Value from the PTB table, not verified
Rockwool blanket, 4 inch thick batt (Full-Thik), with 3/16 inch Transite facing
PTB reference data
Original description
Rockwool blanket, 4 inch thick batt (Full-Thik), with 3/16 inch Transite facing
Material properties
Thickness: 4 inch
Wall distance: 1 inch
Perforation: 11%
Backing: 3/16 inch thick perforated cement asbestos board (Transite)
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.50
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.45 | 0.90 | 1.00 | 0.90 | 0.70 | 0.30 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.50 | 0.44 | 0.88 | 0.99 | 0.88 | 0.70 | 0.30 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: