WoodBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 84
Value from the PTB table, not verified
Deweton acoustic panel Type D (Helmholtz resonator), 4 mm slots
PTB reference data
Original description
Deweton acoustic panel Type D (Helmholtz resonator), 4 mm slots
Material properties
Manufacturer: Danzer Furnierwerke GmbH
Thickness: 1 in
Wall distance: 1.2 in
Perforation: 0.2 in wide slots on visible side at 1.3 in spacing
Hole size: 0.5 in diameter (tube)
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 3 variants
NRC
0.50
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.25 | 0.35 | 0.55 | 0.85 | 0.55 |
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| Compare | Value |
|---|---|
| NRC0.50 | |
| NRC0.50 | |
| NRC0.35 |
NRC: 0.50 (derived from ISO 354 lab data)
Weight / density: 11 kg / m²
Dimensions: width 24 in, Längen: 24 in, 48 in, 72 in, 98 in, 118 in.
Application: Wand- and Deckenplatte
Distance: 1.2 in
Measured values as a table (3 measurements)
| 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 | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 mm · 11 kg / m² · 30 mm · Wand- and Deckenplatte · Spezialspanplatte beidseitig furniert and mattiert | 0.50 | 0.18 | 0.23 | 0.26 | 0.25 | 0.18 | 0.17 | 0.20 | 0.23 | 0.30 | 0.40 | 0.53 | 0.70 | 0.90 | 1.03 | 1.06 | 0.85 | 0.63 | 0.53 | 0.55 |
| 25 mm · 11 kg / m² · 30 mm · Wand- and Deckenplatte · Spezialspanplatte beidseitig furniert and mattiert | 0.50 | 0.26 | 0.28 | 0.30 | 0.26 | 0.25 | 0.24 | 0.30 | 0.35 | 0.43 | 0.48 | 0.58 | 0.63 | 0.70 | 0.86 | 1.00 | 0.80 | 0.50 | 0.35 | 0.36 |
| 25 mm · 11 kg / m² · 30 mm · Wand- and Deckenplatte · Spezialspanplatte beidseitig furniert and mattiert | 0.35 | 0.15 | 0.19 | 0.32 | 0.40 | 0.30 | 0.25 | 0.32 | 0.31 | 0.31 | 0.29 | 0.30 | 0.35 | 0.45 | 0.57 | 0.68 | 0.55 | 0.36 | 0.20 | – |
Measured values as a table (3 measurements)
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