FIELD: physics.
SUBSTANCE: invention relates to screens equipped with means of reducing speckles. Speckle attenuation system comprises at least one main vibration element configured to be attached to the projection screen, wherein said at least one main vibration element is configured to communicate the projection screen with vibration in a given frequency spectrum; and masking made with possibility of attenuation of audible sound transmission from said at least one main vibration element. Said preset frequency spectrum has power widely distributed in given frequency spectrum, wherein message to projection screen of vibration weakens speckles to acceptable level.
EFFECT: technical result is reduction of speckles.
9 cl, 8 dwg
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