Reference surfaceLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: JASA 104 (6) Dec 1998
Value from the PTB table, not verified
Wood sidewalls, 1 layer, 12 mm with doors & lighting
PTB reference data
Original description
Wood sidewalls, 1 layer, 12 mm with doors & lighting
Material properties
No further information available.
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.15
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.20 | 0.20 | 0.15 | 0.10 | 0.05 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
NRC: 0.15 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 6,2 kg/m² | 0.15 | 0.28 | 0.22 | 0.19 | 0.13 | 0.08 | 0.06 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: