FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter http://www.illbruck-raumakustik.de
Value from the PTB table, not verified
illbruck FM C1 cassette inlay, melamine foam, A2
FM C1 cassette inlay
PTB reference data
Original description
illbruck FM C1 cassette inlay, melamine foam, A2
Material properties
Manufacturer: illbruck GmbH
Thickness: 10 mm, 5 mm
Up to fire class: A2
Application: ceiling facing
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.70
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.70 | 0.60 | 0.75 | 0.80 | 0.75 |
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| Compare | Value | |
|---|---|---|
| 10 mm thickness der Dämmstoffschicht | αw0.70 | |
| 5 mm thickness der Dämmstoffschicht | αw0.55 |
Dimensions: 595 x 595 mm, 620 x 620 mm, 1195 x 1195 mm, 1245 x 620 mm, 1250 x 830 mm
Measured values as a table (2 measurements)
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 mm thickness der Dämmstoffschicht | 0.70 | 0.48 | 0.52 | 0.52 | 0.70 | 0.71 | 0.70 | 0.66 | 0.54 | 0.54 | 0.74 | 0.76 | 0.80 | 0.79 | 0.83 | 0.79 | 0.77 | 0.75 | 0.72 |
| 5 mm thickness der Dämmstoffschicht | 0.55 | 0.44 | 0.50 | 0.60 | 0.70 | 0.68 | 0.60 | 0.52 | 0.42 | 0.43 | 0.53 | 0.57 | 0.61 | 0.62 | 0.64 | 0.65 | 0.61 | 0.60 | 0.55 |
Measured values as a table (2 measurements)
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