Plastic & filmHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerunterlagen
Value from the PTB table, not verified
ESO-KVO absorber panel
ESO-KVO absorber panel
PTB reference data
Original description
ESO-KVO absorber panel
Material properties
Manufacturer: ESO-Akustik Brigitte Schmelzle
Thickness: 1.1 in
Wall distance: 2 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.65
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.50 | 0.75 | 0.80 | 0.70 | 0.75 |
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Value from the PTB table, not verified
NRC: 0.65 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 28 mm · 50 mm (gefüllt) · Holzrahmenkonstruktion · gelochte Kuststoff-/ Schaumoberfläche, Lochdurchmesser 42 mm, Lochflächenanteil 35 % | 0.65 | 0.13 | 0.19 | 0.25 | 0.37 | 0.48 | 0.59 | 0.70 | 0.74 | 0.88 | 0.86 | 0.84 | 0.72 | 0.66 | 0.62 | 0.75 | 0.92 | 0.77 | 0.62 |
Measured values as a table (1 measurement)
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