Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.1-16
Value from the PTB table, not verified
Perforated asbestos cement cassette with non-woven fiber
PTB reference data
Original description
Perforated asbestos cement cassette with non-woven fiber
Material properties
Thickness: 0.2 in + non-woven fiber
Wall distance: 3.9 in
Dimensions: 600 x 24 in
Perforation: 17%
Hole size: 0.2 in
Backing: Non-woven fiber 15.5 Rayl
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.70
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.55 | 0.85 | 0.80 | 0.60 | 0.55 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
NRC: 0.70 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4 mm + Faservlies · 100 mm | 0.70 | 0.15 | 0.18 | 0.35 | 0.48 | 0.55 | 0.62 | 0.80 | 0.80 | 0.88 | 0.90 | 0.84 | 0.68 | 0.55 | 0.61 | 0.58 | 0.55 | 0.54 | 0.50 | 0.48 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: