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
Loop pile tufted carpet on hair pad, 1.4 kg/m², 9.5 mm pile height
PTB reference data
Original description
Loop pile tufted carpet on hair pad, 1.4 kg/m², 9.5 mm pile height
Material properties
Surface weight: 1.4 kg/m²
Backing: hair pad, 1.4 kg/m²
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.55
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.25 | 0.55 | 0.70 | 0.60 | 0.85 |
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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 |
|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.55 | 0.03 | 0.25 | 0.55 | 0.70 | 0.62 | 0.84 |
Measured values as a table (1 measurement)
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