FoamLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Value from the PTB table, not verified
Plastic, fiberglass reinforced phenolic foam, filled with aluminum hydroxide, faced with very thin layer plywood
PTB reference data
Original description
Plastic, fiberglass reinforced phenolic foam, filled with aluminum hydroxide, faced with very thin layer plywood
Material properties
No further information available.
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.15
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.25 | 0.15 | 0.10 | 0.10 | 0.10 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz | 8000 Hz |
|---|---|---|---|---|---|---|---|---|
| 4 kg / m² | 0.15 | 0.25 | 0.23 | 0.16 | 0.12 | 0.11 | 0.10 | 1.80 |
Measured values as a table (1 measurement)
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