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
Fiberglass acoustical blanket, max width: 96 inch, max length: 125 ft
Type KN
PTB reference data
Original description
Fiberglass acoustical blanket, max width: 96 inch, max length: 125 ft
Material properties
Manufacturer: Knauf Fiber Glass
Thickness: 1 inch, 1 1/2 inch
Wall distance: 0 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 6 variants
NRC
0.85
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.50 | 0.90 | 1.00 | 1.00 | 1.00 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | ||
|---|---|---|---|
| 1 1/2 inch | 0.13 lb/ft² | NRC0.85 | |
| 1 1/2 inch | 0.19 lb/ft² | NRC0.90 | |
| 1 1/2 inch | 0.75 lb/ft² | NRC0.75 | |
| 1 inch | 0.08 lb/ft² | NRC0.65 | |
| 1 inch | 0.13 lb/ft² | NRC0.65 | |
| 1 inch | 0.75 lb/ft² | NRC0.55 |
NRC: 0.85 (derived from ISO 354 lab data)
Dimensions: roll
Distance: 0
Measured values as a table (6 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1 inch · 0.75 lb/ft² · 0 | 0.55 | 0.12 | 0.18 | 0.51 | 0.72 | 0.78 | 0.86 |
| 1 1/2 inch · 0.75 lb/ft² · 0 | 0.75 | 0.20 | 0.42 | 0.82 | 0.87 | 0.94 | 0.91 |
| 1 inch · 0.08 lb/ft² · 0 | 0.65 | 0.17 | 0.24 | 0.62 | 0.79 | 0.88 | 0.96 |
| 1 1/2 inch · 0.13 lb/ft² · 0 | 0.85 | 0.31 | 0.50 | 0.89 | 0.98 | 1.01 | 1.01 |
| 1 inch · 0.13 lb/ft² · 0 | 0.65 | 0.03 | 0.28 | 0.56 | 0.82 | 0.90 | 0.94 |
| 1 1/2 inch · 0.19 lb/ft² · 0 | 0.90 | 0.21 | 0.51 | 0.97 | 1.08 | 1.07 | 1.06 |
Measured values as a table (6 measurements)
Access frequency bands, variants and export. Create a permanent free account
Last updated:
