MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter www.owa.de
Value from the PTB table, not verified
OWAtecta perfora micro-perforated steel ceiling tile, 0.64% open area
OWAtecta – perfora
PTB reference data
Original description
OWAtecta perfora micro-perforated steel ceiling tile, 0.64% open area
Material properties
Manufacturer: Odenwaldwerk
Wall distance: 7.9 in
Perforation: 0.64%
Application: ceiling
Mounting: suspension height 7.9 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.50
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.60 | 0.65 | 0.40 | 0.35 | 0.15 |
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Value from the PTB table, not verified
NRC: 0.50 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 200 mm | 0.50 | 0.19 | 0.37 | 0.42 | 0.52 | 0.65 | 0.70 | 0.73 | 0.66 | 0.58 | 0.37 | 0.41 | 0.49 | 0.43 | 0.35 | 0.28 | 0.21 | 0.17 | 0.12 |
Measured values as a table (1 measurement)
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