Stone & concreteHighly 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
Slotted concrete masonry block, with fiberglass in cavities, metal septa
Type RSC – Soundblox
PTB reference data
Original description
Slotted concrete masonry block, with fiberglass in cavities, metal septa
Material properties
Manufacturer: Proudfoot Co.
Thickness: 12 inches
Wall distance: 0 mm
Backing: fiberglass in cavities, metal septa
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.65
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.75 | 1.00 | 0.95 | 0.55 | 0.60 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 12 inches · 70 lb/ft² · 0 | 0.65 | 0.57 | 0.76 | 1.09 | 0.94 | 0.54 | 0.59 |
Measured values as a table (1 measurement)
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