Reference surfaceHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 a 6-4
Value from the PTB table, not verified
Carpet, loop pile, on felt underlay
PTB reference data
Original description
Carpet, loop pile, on felt underlay
Material properties
Thickness: 5.3 mm
Surface weight: 1.98 kg/m²
Backing: felt underlay
Surface: waffle structure
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.35
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.30 | 0.70 | 0.90 | 0.75 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5,3 mm · 1,98 kg/m^2 · verlegt on Filzunterlage, 8 mm thick, 1,38 kg/m^2, 36 Rayl. with Waffelstruktur on Oberseite · Schlingenwebart | 0.35 | 0.05 | 0.04 | 0.13 | 0.08 | 0.10 | 0.15 | 0.20 | 0.31 | 0.45 | 0.58 | 0.70 | 0.85 | 0.90 | 0.93 | 0.85 | 0.80 | 0.74 | 0.70 | 0.62 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: