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: 0.4 in, 0.2 in
Up to fire class: A2
Application: ceiling facing
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 2 variants
NRC
0.70
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.70 | 0.60 | 0.75 | 0.80 | 0.75 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | |
|---|---|---|
| 0.4 in thickness der Dämmstoffschicht | NRC0.70 | |
| 0.2 in thickness der Dämmstoffschicht | NRC0.60 |
NRC: 0.70 (derived from ISO 354 lab data)
Dimensions: 595 x 23 in, 620 x 24 in, 1195 x 47 in, 1245 x 24 in, 1250 x 33 in
Measured values as a table (2 measurements)
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 0.60 | 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)
Access frequency bands, variants and export. Create a permanent free account
Last updated: