Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data online at www.bausteine-briest.de, 01.02.2001
Value from the PTB table, not verified
Liakustik Liapor sound absorber blocks for track construction
Liakustik, Liapor 1-4
PTB reference data
Original description
Liakustik Liapor sound absorber blocks for track construction
Material properties
Manufacturer: Bausteine Briest GmbH
Wall distance: 30 mm
Application: track construction, between sleepers
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.80
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.90 | 0.70 | 0.80 | 0.85 | 0.85 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 mm | 0.80 | 0.53 | 0.65 | 0.75 | 0.94 | 0.92 | 0.81 | 0.68 | 0.64 | 0.72 | 0.83 | 0.81 | 0.83 | 0.85 | 0.82 | 0.82 | 0.84 | 0.85 | 0.82 |
Measured values as a table (1 measurement)
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