pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft

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: cassette insert

Mounting: as raft, wall-to-wall solution

ISO 354 – reverberation chamber· 4 variants

α_w

0.45

α_p per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.30	0.40	0.40	0.40	0.45	0.55

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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: 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	0.35	0.10	0.15	0.25	0.35	0.35	0.45
1,5 mm · 4,4 - 4,8 kg/m² · 200 mm	0.40	0.15	0.20	0.35	0.40	0.40	0.45
1,5 mm · 4,4 - 4,8 kg/m² · 300 mm	0.40	0.20	0.35	0.35	0.35	0.45	0.50
1,5 mm · 4,4 - 4,8 kg/m² · 500 mm	0.45	0.30	0.40	0.40	0.40	0.45	0.55

Measured values as a table (4 measurements)

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Last updated: 02/09/2026