FIELD: construction industry.
SUBSTANCE: present invention relates to a panel (100) with one or more perforations (140) containing a front surface (120) in which the Cm contrast between the front surface (120) and the specified one or more perforations (140) is less than 0.3, a sound-absorbing system containing a panel (100) and a masking layer (160), while the masking layer (160) is breathable, and the use of the specified panel or sound-absorbing system.
EFFECT: expansion of the range of sound-absorbing solution.
15 cl, 6 dwg
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