FIELD: machine building.
SUBSTANCE: device is designed for damping noise in flow through channels. The sound absorbing flow-through channel device forms at least two flow through channels having an inlet orifice and an outlet orifice. The flow-through channels at least partially are restricted with three walls dissipating acoustic energy; the walls are formed with a package of the first, second and third sheets forming flow-through channels between them. Each of the said first, second and third channels is equipped with at least one lug and/or recess. The said lug partially enters the recess, so that the outlet orifice of the flow-through channel can not be visualised through the inlet orifice and vice versa.
EFFECT: additional dissipation of sound energy.
17 cl, 20 dwg
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