WoodHighly 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 10% perforated or 20% slotted hardboard
PTB reference data
Original description
Mineral or glass wool blanket covered with 10% perforated or 20% slotted hardboard
Material properties
Thickness: 2 inch
Wall distance: 1 inch
Perforation: 10%, 20%
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.00
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|
| αp | 0.40 | 0.80 | 0.90 | 0.85 | 0.75 |
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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 |
|---|---|---|---|---|---|---|
| 2-in · 5-15 lb/ft² · 1-in · 10 % perforated or 20% slotted hardboard | 0.00 | 0.40 | 0.80 | 0.90 | 0.85 | 0.75 |
Measured values as a table (1 measurement)
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