WoodLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Hardboard panel, 1/8 inch, 1 lb/ft² with bituminous roofing felt
PTB reference data
Original description
Hardboard panel, 1/8 inch, 1 lb/ft² with bituminous roofing felt
Material properties
Thickness: 1/8 inch
Wall distance: 2 inch
Surface weight: 1 lb/ft²
Backing: bituminous roofing felt
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.33
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.90 | 0.45 | 0.25 | 0.15 | 0.10 | 0.10 |
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Method (354): Measured