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
Mineral or glass wool blanket, covered with open weave fabric
PTB reference data
Original description
Mineral or glass wool blanket, covered with open weave fabric
Material properties
Thickness: 2 inch
Wall distance: 1 inch
Surface: open weave fabric
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.90
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.70 | 0.90 | 0.90 | 0.95 | 0.90 |
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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 |
|---|---|---|---|---|---|---|---|
| 2-in · 5-15 lb/ft² · 1-in · open weave fabric | 0.90 | 0.35 | 0.70 | 0.90 | 0.90 | 0.95 | 0.90 |
Measured values as a table (1 measurement)
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