WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
1 inch Tectum over 2 1/2 inch OCF noise barrier batt
panel
PTB reference data
Original description
1 inch Tectum over 2 1/2 inch OCF noise barrier batt
Material properties
Manufacturer: Tectum
Thickness: 3 1/2 inch
Wall distance: 40 mm
Backing: 2 1/2 inch OCF noise barrier batt
Surface: perforated facing
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.85
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.70 | 1.00 | 0.95 | 0.75 | 0.95 |
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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 |
|---|---|---|---|---|---|---|---|
| 3 1/2 inch · 2.8 lb/ft² · covered with perforated facing, airspace 40 mm | 0.85 | 0.32 | 0.70 | 1.09 | 0.93 | 0.76 | 0.94 |
Measured values as a table (1 measurement)
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