Reference surfaceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: CARPET_SOFT, C: Floors, D: 10
Value from the PTB table, not verified
Floors, 10 mm soft carpet on concrete
PTB reference data
Original description
Floors, 10 mm soft carpet on concrete
Material properties
Thickness: 0.4 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.20
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.10 | 0.20 | 0.25 | 0.25 | 0.35 |
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Value from the PTB table, not verified
NRC: 0.20 (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 |
|---|---|---|---|---|---|---|---|
| 10 mm · on concrete | 0.20 | 0.09 | 0.08 | 0.21 | 0.26 | 0.27 | 0.37 |
Measured values as a table (1 measurement)
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