FIELD: machine building.
SUBSTANCE: sound damper is designed to suppress sound radiation into environment in systems for removal of industrial off-gases. A resonant sound damper of reflecting type comprises an acoustically transparent perforated pipeline, the first and second flange put onto edges of this pipeline and an external jacket covering the device along the perimetre of flanges. A set of Helmholtz resonators is installed in a volume limited with the first and second flanges with an acoustically transparent perforated pipeline and a jacket, besides, the volume of each Helmholtz resonator and geometry of its half is selected so that reflected acoustic capacity exceeds the absorbed one, and the band of reflected frequencies for the entire resonant sound damper covers the frequency band of suppressed noise.
EFFECT: ability to operate in a medium of hot industrial gases saturated with vapours of aggressive liquids.
2 dwg
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