Plastic & filmHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 a 4-9
Value from the PTB table, not verified
Mineral shot panel with porous hard foil
PTB reference data
Original description
Mineral shot panel with porous hard foil
Material properties
Thickness: 15 mm
Wall distance: 50 mm
Surface weight: 4.4 kg/m²
Surface: porous hard foil on both sides
Flow resistance: 400 Rayl
Mounting: on 24/48 mm cross-battening
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.50
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.45 | 0.70 | 0.50 | 0.45 | 0.55 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 mm · 4,4 kg/m^2 · 50 mm · Montiert on Kreuzlattung 24/48 mm, Air cavity 50 mm, horizontaler Abstand 800 mm, vertikaler Abstand 625 mm, Ränder der Prüffläche seitl. geschlossen · poröse Hartfolie | 0.50 | 0.02 | 0.09 | 0.17 | 0.22 | 0.50 | 0.58 | 0.70 | 0.74 | 0.68 | 0.58 | 0.54 | 0.43 | 0.45 | 0.48 | 0.48 | 0.53 | 0.55 | 0.50 | 0.55 |
Measured values as a table (1 measurement)
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