Mineral wool
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
Fissured acoustical tile
Auratone
PTB reference data
Original description
Fissured acoustical tile
Material properties
Manufacturer: USG Interiors
Thickness: 5/8 inch, 3/4 inch
Wall distance: 16 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 3 variants
NRC
0.65
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.35 | 0.75 | 0.75 | 0.70 | 0.70 |
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| Compare | Value | ||
|---|---|---|---|
| 3/4 inch | 1.2 lb/ft² | NRC0.65 | |
| 5/8 inch | 0.9 lb/ft² | NRC0.55 | |
| 5/8 inch | 1.2 lb/ft² | NRC0.55 |
NRC: 0.65 (derived from ISO 354 lab data)
Dimensions: 12 x 12 inches
Distance: 16 in
Measured values as a table (3 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 5/8 inch · 0.9 lb/ft² · 400 mm | 0.55 | 0.42 | 0.29 | 0.52 | 0.68 | 0.64 | 0.69 |
| 3/4 inch · 1.2 lb/ft² · 400 mm | 0.65 | 0.50 | 0.36 | 0.76 | 0.73 | 0.69 | 0.72 |
| 5/8 inch · 1.2 lb/ft² · 400 mm | 0.55 | 0.59 | 0.33 | 0.45 | 0.70 | 0.79 | 0.70 |
Measured values as a table (3 measurements)
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