Mineral woolHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer's product sheet
Value from the PTB table, not verified
Ecophon RT D gypsum board-glass wool absorber with Akutex T surface
Ecophon – RT D
PTB reference data
Original description
Ecophon RT D gypsum board-glass wool absorber with Akutex T surface
Material properties
Manufacturer: Ecophon GmbH
Thickness: 1.2 in
Wall distance: 7.9 in
Surface: smooth, Akutex T treated
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.75
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.40 | 0.60 | 0.90 | 1.00 | 0.90 |
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Value from the PTB table, not verified
NRC: 0.75 (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 |
|---|---|---|---|---|---|---|---|
| 30 mm · ca. 12 kg / m² incl. Unterkonstruktion · tKh = 200 mm (totale Konstruktionshöhe) · ceiling and Schalldämmung for Räume, deren Zwischenwände nicht bis to the structural ceiling hinaufreichen. Auch vertikale Schalldämmung von z.B. airborne and impact sound. Verdeckte Unterkonstruktion, diskretes Fugenmuster, demontierbar · Akutex T | 0.75 | 0.35 | 0.40 | 0.60 | 0.90 | 1.00 | 0.90 |
Measured values as a table (1 measurement)
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