Galvanized expanded metal, with PLANO A2 (thickness = 20 mm), closed ceiling, wall-to-wall solution

SPORTSLINE V

PTB reference data

Original description

Material properties

Manufacturer: pinta acoustic gmbh

Thickness: 0.8 in

Wall distance: 3.9 in, 7.9 in, 12 in, 20 in

Application: ceiling

Reverberation chamber (ASTM C423 / ISO 354)· 4 variants

NRC

0.65

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.30	0.50	0.60	0.70	0.75	0.75

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NRC: 0.65 (derived from ISO 354 lab data)

Weight / density: 5,9 - 8,3 kg/m²

Dimensions: 2500 x 49 in

Measured values as a table (4 measurements)

Galvanized expanded metal, with PLANO A2 (thickness = 20 mm), closed ceiling, wall-to-wall solution: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz
20 mm · 5,9 - 8,3 kg/m² · 100 mm	0.60	0.15	0.35	0.65	0.65	0.70	0.70
20 mm · 5,9 - 8,3 kg/m² · 200 mm	0.65	0.20	0.50	0.60	0.65	0.75	0.65
20 mm · 5,9 - 8,3 kg/m² · 300 mm	0.65	0.30	0.50	0.60	0.70	0.75	0.75
20 mm · 5,9 - 8,3 kg/m² · 500 mm	0.70	0.40	0.55	0.60	0.75	0.80	0.80

Measured values as a table (4 measurements)

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Last updated: 09/02/2026