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
Structural roof deck
Tectum I
PTB reference data
Original description
Structural roof deck
Material properties
Manufacturer: Tectum
Thickness: 1 1/2 inch, 2 inch, 2 1/2 inch, 3 inch
Wall distance: 0 in
Application: roof
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 4 variants
NRC
0.80
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.40 | 1.00 | 0.75 | 1.00 | 0.95 |
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| Compare | Value | ||
|---|---|---|---|
| 3 inches | 5.3 lb/ft² | NRC0.80 | |
| 2 1/2 inches | 4.5 lb/ft² | NRC0.65 | |
| 2 inches | 3.5 lb/ft² | NRC0.60 | |
| 1 1/2 inch | 2.4 lb/ft² | NRC0.55 |
NRC: 0.80 (derived from ISO 354 lab data)
Dimensions: 48 x 96 inches
Distance: 0
Measured values as a table (4 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1 1/2 inch · 2.4 lb/ft² · 0 | 0.55 | 0.07 | 0.22 | 0.48 | 0.82 | 0.64 | 0.96 |
| 2 inches · 3.5 lb/ft² · 0 | 0.60 | 0.15 | 0.26 | 0.62 | 0.94 | 0.64 | 0.92 |
| 2 1/2 inches · 4.5 lb/ft² · 0 | 0.65 | 0.20 | 0.31 | 0.72 | 0.84 | 0.77 | 0.90 |
| 3 inches · 5.3 lb/ft² · 0 | 0.80 | 0.21 | 0.41 | 1.00 | 0.75 | 1.00 | 0.97 |
Measured values as a table (4 measurements)
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