SOUND SCREEN Russian patent published in 2016 - IPC E01F8/00 

FIELD: acoustics; construction.

SUBSTANCE: invention relates to noise reducing structures. Sound screen contains foundation base, bearing base, transverse posts, lengthwise profiles, rear sound-reflecting panel, face sound transparent panel, perforated with through holes, sound-absorbing panels. Sound-absorbing panels of sound screen are made as blocked separate structural container-type modules, presented by cavity containers with dismantled covers of automotive bodies of accumulator batteries, which ended their life cycle. Isolated container-type modules are mounted in separate cells of bearing base, presented by sheet or rod-shaped bearing matrix structure secured to cross bars, and/or longitudinal profiles and/or rear sound-reflecting panel and/or base of sound screen. Along perimeter folding parts of openings of each of cavernous container with dismantled covers of automotive bodies of accumulator batteries closing covers are coupled without gaps, using corresponding adhesive substances and/or mechanical connections, which are equipped with integrated open neck parts, forming frequency-adjusted sound power absorption devices in form of Helmholtz resonators, made by corresponding selection of their base composite structural elements, which are volume of cavity container V_k of separate structural container-type module with closing cover, geometrical length h and area of flow section of open neck part, made in form of one perforation hole, or total area of cross-section of open neck part of defined areas of separate components of flow passages of several identical in geometric form and dimensions perforation holes with flow section area F_holes of each of n_holes, determining total area of flow passage of open neck part n_holes·F_holes, frequency-adjusted sound power absorption device in form of Helmholtz resonators according to given formula and/or open neck parts of closing covers, equipped with integrated open neck parts, forming Helmholtz resonators, are presented by tubular elements, attached to them in consoles, flow section area F_holes, geometrical length h and dynamic length l_R of neck part, which is determined according to given formula, conductivity of open neck part of acoustic Helmholtz resonator, determined by given formula, free end sections, cuts of which are located inside and/or outside container-type modules with installed closing covers.

EFFECT: reduced contamination of environment.

14 cl, 27 dwg