NOISE-ABSORBING STRUCTURE Russian patent published in 2017 - IPC F01N1/04 E04B1/86 

FIELD: physics.

SUBSTANCE: noise-absorbing construction is made in the form of a set of absorbing resonators, installed with a certain step relative to each other and forming a space lattice. Resonator chambers are made in the form of coaxial cylinders of different diameters, preferably one to three, whose ratio of throat diameter to their length is 1:4-6, and placed in such a way that the distance from the resonator neck to the front side of the enclosing structure does not exceed the resonator length, and the distance between the resonators is not less than 4-6 diameters of the largest chamber of the smallest resonator. The axis of symmetry of the coaxial cylinders of resonators is perpendicular to the direction of the incident wave.

EFFECT: increasing the efficiency of noise absorption and reduce vibration.

2 cl, 3 dwg, 2 tbl