WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter http://www.lignoform.com, Feb. 01
Value from the PTB table, not verified
Lignoform perforated gym panel, ball-impact resistant
Lignoform perforated panel, gym panel
PTB reference data
Original description
Lignoform perforated gym panel, ball-impact resistant
Material properties
Manufacturer: Lignoform Benken AG
Thickness: 0.7 in
Wall distance: 2.4 in
Perforation: perforated
Backing: acoustic non-woven
Application: gymnasium walls
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.80
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.65 | 0.90 | 0.90 | 0.70 | 0.45 |
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Value from the PTB table, not verified
NRC: 0.80 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18 mm · 60 mm · Holzoberfläche | 0.80 | 0.07 | 0.10 | 0.25 | 0.52 | 0.69 | 0.74 | 0.90 | 0.91 | 0.87 | 0.88 | 0.90 | 0.89 | 0.83 | 0.65 | 0.57 | 0.52 | 0.42 | 0.45 |
Measured values as a table (1 measurement)
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