FoamHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 144
Value from the PTB table, not verified
Gummi-Stricker PSST sound absorption panel FN 71/25
PSST sound absorption panel – FN 71/25
PTB reference data
Original description
Gummi-Stricker PSST sound absorption panel FN 71/25
Material properties
Manufacturer: Gummi-Stricker
Thickness: 1 in
Wall distance: 0 in
Surface: glass mesh fabric
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 | 0.05 | 0.15 | 0.40 | 0.65 | 0.85 | 1.00 |
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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 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 mm · 0,5 kg / m² · 0 | 0.50 | 0.04 | 0.07 | 0.12 | 0.17 | 0.22 | 0.30 | 0.38 | 0.45 | 0.55 | 0.63 | 0.75 | 0.80 | 0.90 | 0.92 | 0.96 | 0.99 |
Measured values as a table (1 measurement)
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