CUBIC CUSTOM-MADE ACOUSTIC ABSORBER Russian patent published in 2008 - IPC E04B1/84 

FIELD: construction.

SUBSTANCE: cubic custom-made acoustic absorber consists of rigid frame that is suspended to production building ceiling with sound absorbing material that is wrapped in cloth and installed inside the frame. Frame is shaped as two cubic surfaces, one of which - external one - is made as perforated, and the other - internal one - as acoustically transparent. Sound absorbing material, which is wrapped with meshy capron fabric, is installed in the gap between the frames, which are connected between each other by means of resonance inserts of different diameter, and internal cavity is separated by partition into two resonance cavities, one of which is filled with acoustic absorber, at that lamps with power supply are installed in resonance inserts.

EFFECT: increase of sound-suppression efficiency and improvement of performance properties.

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