Plastic & filmLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data im Internet
Value from the PTB table, not verified
RAS Raumakustik SAG-TA 1 foil absorber
SAG-TA 1
PTB reference data
Original description
RAS Raumakustik SAG-TA 1 foil absorber
Material properties
Manufacturer: RAS Raumakustik GmbH
Application: low frequencies
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.40
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 1.00 | 0.65 | 0.50 | 0.25 | 0.25 | 0.15 |
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Value from the PTB table, not verified
NRC: 0.40 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 80 Hz | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.40 | 1.30 | 1.20 | 0.65 | 0.50 | 0.25 | 0.25 | 0.15 |
Measured values as a table (1 measurement)
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