Noise barrier
AssigneeShowa Koji K.K.
InventorNorio Murakami
Life of this patent
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Abstract
Disclosed is a noise barrier which comprises a hollow-cell type block having as its principal components a perforated sound-absorbing plate opposed to the noise source and a sound-insulating plate disposed opposite said sound-absorbing plate and incorporating therebetween a sound-absorbing material, a free spacing plate disposed behind said block across an intervening free air layer and means for absorbing and damping sound energy (a vibration-repressing coupling). There is also disclosed a noise barrier having a plurality of adjacent hollow-cell type blocks provided jointly with a free spacing plate by the medium of a support column so as to cover the supporting face.
Claims13
A noise barrier comprising (1) a hollow cell type block composed of (a) a perforated sound-absorbing plate falling on the side confronting the noise source, (b) a sound-insulating plate disposed opposite said perforated sound-absorbing plate, (c) partition plates disposed between said two plates so as to divide the intervening space between said two plates into a plurality of cavities and (d) a sound-absorbing material placed to fill said cavities, (2) a free spacing plate disposed parallel to said sound-insulating plate and across a space therefrom so as to enclose a free air layer in conjunction with said sound-insulating plate and (3) vibration-repressing means coupling said hollow cell type block and said free spacing plate.
Dependencies are inferred from the claim text.