Plaster & sprayHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Cellulose-base fiber, white, sprayed on, textured finish
K13FC
PTB reference data
Original description
Cellulose-base fiber, white, sprayed on, textured finish
Material properties
Manufacturer: ICC International Cellulose Corp.
Thickness: 3/4 inch, 1 inch
Wall distance: 0 in, 16 in
Surface: textured finish
Mounting: sprayed
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 2 variants
NRC
0.90
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.40 | 0.90 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | |||
|---|---|---|---|---|
| 1 inch | 0.5 lb/ft² | 0 | NRC0.90 | |
| 3/4 inch | 0.38 lb/ft² | 16 in | NRC0.75 |
NRC: 0.90 (derived from ISO 354 lab data)
Measured values as a table (2 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 3/4 inch · 0.38 lb/ft² · 400 mm | 0.75 | 0.25 | 0.36 | 0.74 | 0.98 | 0.99 | 0.99 |
| 1 inch · 0.5 lb/ft² · 0 | 0.90 | 0.12 | 0.38 | 0.88 | 1.16 | 1.15 | 1.12 |
Measured values as a table (2 measurements)
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