Mineral woolHighly 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
Mat-faced, smooth, R duct liner (Manville Linacoustic)
Linacoustic
PTB reference data
Original description
Mat-faced, smooth, R duct liner (Manville Linacoustic)
Material properties
Manufacturer: Manville
Thickness: 1 inch, 1 1/2 inch
Wall distance: 0 in
Surface: smooth
Application: duct liner
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 | 0.05 | 0.50 | 0.95 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | ||
|---|---|---|---|
| 1 1/2 inch | 0.31 lb/ft² | NRC0.90 | |
| 1 inch | 0.23 lb/ft² | NRC0.70 |
NRC: 0.90 (derived from ISO 354 lab data)
Dimensions: roll
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 · 0.23 lb/ft² · 0 | 0.70 | 0.09 | 0.32 | 0.68 | 0.88 | 0.97 | 1.03 |
| 1 1/2 inch · 0.31 lb/ft² · 0 | 0.90 | 0.07 | 0.52 | 0.94 | 1.02 | 1.02 | 1.04 |
Measured values as a table (2 measurements)
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