pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft (series 2)

EXPANDEDLINE – MEDIUM

PTB reference data

Original description

Material properties

Manufacturer: pinta acoustic gmbh

Thickness: 1.5 mm

Wall distance: 100 mm, 200 mm, 300 mm, 500 mm

Backing: glass cellulose non-woven

Surface: galvanized

Mounting: with distance to wall

ISO 354 – reverberation chamber· 4 variants

α_w

0.40

α_p per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.15	0.20	0.40	0.40	0.35	0.40

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Weight / density: 4,4 - 4,8 kg/m²

Dimensions: variabel

Measured values as a table (4 measurements)

pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft (series 2): sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	α_w	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz
1,5 mm · 4,4 - 4,8 kg/m² · 100 mm	0.25	0.05	0.05	0.15	0.40	0.35	0.35
1,5 mm · 4,4 - 4,8 kg/m² · 200 mm	0.35	0.10	0.15	0.25	0.40	0.35	0.35
1,5 mm · 4,4 - 4,8 kg/m² · 300 mm	0.35	0.10	0.15	0.25	0.40	0.35	0.40
1,5 mm · 4,4 - 4,8 kg/m² · 500 mm	0.40	0.15	0.20	0.40	0.40	0.35	0.40

Measured values as a table (4 measurements)

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Last updated: 15/09/2026