Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
Fonoleca nervato concrete block with expanded clay as cavity resonator
Cavity resonator – Fonoleca nervato
PTB reference data
Original description
Fonoleca nervato concrete block with expanded clay as cavity resonator
Material properties
Manufacturer: Associazione Nazionale Produttori Elementi Leca
Wall distance: 150 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.85
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.55 | 1.00 | 0.95 | 0.85 | 0.95 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 210 Kg/m^2 · 150 mm · rauhe Betonoberfläche with Löchern | 0.85 | 0.13 | 0.15 | 0.20 | 0.35 | 0.55 | 0.68 | 1.05 | 1.03 | 0.93 | 0.90 | 0.93 | 0.95 | 0.88 | 0.83 | 0.85 | 0.88 | 0.93 | 1.00 |
Measured values as a table (1 measurement)
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