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, "carpet" finish
K13
PTB reference data
Original description
Cellulose-base fiber, white, sprayed on, "carpet" finish
Material properties
Manufacturer: ICC International Cellulose Corp.
Thickness: 1 inch, 3 inch
Wall distance: 0 in
Surface: carpet finish
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 2 variants
NRC
1.00
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.60 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | ||
|---|---|---|---|
| 3 inch | 0.88 lb/ft² | NRC1.00 | |
| 1 inch | 0.29 lb/ft² | NRC0.95 |
NRC: 1.00 (derived from ISO 354 lab data)
Distance: 0
Measured values as a table (2 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1 inch · 0.29 lb/ft² · 0 | 0.95 | 0.19 | 0.60 | 1.05 | 1.11 | 1.03 | 0.98 |
| 3 inch · 0.88 lb/ft² · 0 | 1.00 | 0.59 | 0.99 | 1.04 | 1.03 | 1.00 | 0.98 |
Measured values as a table (2 measurements)
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