Reference surfaceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Carpet: Loop pile tufted carpet, 0.7 kg/m²: With 1.4 kg/m² hair pad
PTB reference data
Original description
Carpet: Loop pile tufted carpet, 0.7 kg/m²: With 1.4 kg/m² hair pad
Material properties
Surface weight: 0.7 kg/m²
Backing: 1.4 kg/m² hair pad
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 | 0.10 | 0.20 | 0.35 | 0.80 | 0.70 | 0.80 |
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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 | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.50 | 0.10 | 0.19 | 0.35 | 0.79 | 0.69 | 0.79 |
Measured values as a table (1 measurement)
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