Mineral woolLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
Ecophon X-Bass fiber absorber
Ecophon – X-Bass
PTB reference data
Original description
Ecophon X-Bass fiber absorber
Material properties
Manufacturer: Ecophon GmbH
Thickness: 3.9 in
Wall distance: 3.9 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.40
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.85 | 0.80 | 0.45 | 0.25 | 0.15 | 0.10 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
NRC: 0.40 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 63 Hz | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|---|
| 100 mm · tKh = 200 mm (totale Konstruktionshöhe) | 0.40 | 0.40 | 0.85 | 0.80 | 0.45 | 0.25 | 0.15 | 0.10 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: