MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.2-6
Value from the PTB table, not verified
Metal baffle ceiling, aluminum with mineral fiber panel
PTB reference data
Original description
Metal baffle ceiling, aluminum with mineral fiber panel
Material properties
Thickness: 0.3 mm + baffle curvature
Wall distance: 176 mm
Surface weight: 3.2 kg/m
Backing: mineral fiber panel, 20 mm thick
Surface: surface-treated on room side
Flow resistance: 90 kPa·s/m
Mounting: on carrier rails
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.85
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.90 | 1.00 | 0.90 | 0.85 | 0.65 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0,3 mm + Lamellenwölbung · 176 mm | 0.85 | 0.55 | 0.78 | 0.89 | 0.98 | 1.03 | 1.00 | 1.02 | 0.90 | 0.88 | 0.88 | 0.93 | 0.88 | 0.78 | 0.68 | 0.61 | 0.62 |
Measured values as a table (1 measurement)
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