WoodLow-frequency absorber

Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: Herstellerunterlagen

Value from the PTB table, not verified

ESO MODULATOR 22/3 plywood ceiling facing with mineral wool

ESO MODULATOR 22/3

PTB reference data

Original description

ESO MODULATOR 22/3 plywood ceiling facing with mineral wool

Material properties

Manufacturer: ESO-Akustik Brigitte Schmelzle
Thickness: 0.2 in
Wall distance: 7.9 in (filled), 2 in (filled)

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 2 variants

NRC
0.15

Frequency values

αp per octave band

f (Hz)1252505001k2k4k
αp0.550.250.150.100.100.20

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CompareValue
7.9 in (gefüllt)NRC0.15
2 in (gefüllt)NRC0.15

NRC: 0.15 (derived from ISO 354 lab data)

Application: Holzrahmenkonstruktion

Terms of use
Measured values as a table (2 measurements)
ESO MODULATOR 22/3 plywood ceiling facing with mineral wool: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-upNRC100 Hz125 Hz160 Hz200 Hz250 Hz315 Hz400 Hz500 Hz630 Hz800 Hz1000 Hz1250 Hz1600 Hz2000 Hz2500 Hz3150 Hz4000 Hz5000 Hz
5 mm · 200 mm (gefüllt) · Holzrahmenkonstruktion · geschlossene Holzoberfläche0.150.780.540.350.320.230.180.100.130.160.090.120.080.100.120.130.220.180.18
5 mm · 50 mm (gefüllt) · Holzrahmenkonstruktion · geschlossene Holzoberfläche0.150.530.580.550.350.270.170.130.130.080.070.100.070.100.090.090.080.120.18
Measured values as a table (2 measurements)

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