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 1/2 inch Tectum over 2 1/2 inch OCF noise barrier batt
panel
PTB reference data
Original description
1 1/2 inch Tectum over 2 1/2 inch OCF noise barrier batt
Material properties
Manufacturer: Tectum
Thickness: 4 inches
Wall distance: 1.6 in
Backing: 2 1/2 inch OCF noise barrier batt
Surface: perforated facing
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.95
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.85 | 1.00 | 0.85 | 0.95 | 0.85 |
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Value from the PTB table, not verified
NRC: 0.95 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 4 inches · 3.5 lb/ft² · covered with perforated facing, airspace 40 mm | 0.95 | 0.40 | 0.84 | 1.18 | 0.87 | 0.93 | 0.87 |
Measured values as a table (1 measurement)
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