Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Sound System Engineering, Don Davis and Carolyn Davis
Value from the PTB table, not verified
AF 100 fiberglass insulation blanket
AF 100, 1 inch, mounting 4
PTB reference data
Original description
AF 100 fiberglass insulation blanket
Material properties
Thickness: 1 inch, 2 inch
Mounting: mounting 4
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 5 variants
NRC
0.95
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.90 | 1.00 | 1.00 | 0.95 | 0.90 |
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| Compare | Value | |
|---|---|---|
| 2-in | NRC0.95 | |
| 2-in | NRC0.80 | |
| 2-in | NRC0.75 | |
| 1-in | NRC0.60 | |
| 1-in | NRC0.55 |
NRC: 0.95 (derived from ISO 354 lab data)
Measured values as a table (5 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1-in | 0.55 | 0.07 | 0.23 | 0.42 | 0.77 | 0.73 | 0.70 |
| 2-in | 0.75 | 0.19 | 0.51 | 0.79 | 0.92 | 0.82 | 0.78 |
| 1-in | 0.60 | 0.09 | 0.25 | 0.60 | 0.81 | 0.75 | 0.74 |
| 2-in | 0.80 | 0.20 | 0.56 | 0.89 | 0.93 | 0.84 | 0.80 |
| 2-in | 0.95 | 0.39 | 0.91 | 0.99 | 0.98 | 0.93 | 0.88 |
Measured values as a table (5 measurements)
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