FIELD: physics, acoustics.
SUBSTANCE: invention relates to means of protecting industrial areas from negative acoustic-noise action. The resonance noise absorber comprises interconnected panel with working holes in which removable elements are inserted, and a box. The removable elements have holes which act as orifices, the diameter of which, as well as the length of said elements, the distance between the centres of the orifices and between the back inner wall of the box and the end of the removable element are selected to ensure the required range of absorbed frequencies. Stiffening ribs can be used to increase rigidness of the device. The removable elements are installed to ensure tight contact between the elements and the panel.
EFFECT: creating conditions for more effective protection from acoustic-noise contamination of open technospheric areas while reducing the cost of each separate device.
6 cl, 7 dwg
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