CYLINDRICAL RESONANT ACOUSTIC ABSORBING UNIT Russian patent published in 2007 - IPC E04B1/84 

FIELD: industrial acoustic means, particularly broadband sound absorbing units adapted to decrease noise from industrial equipment.

SUBSTANCE: cylindrical acoustic absorbing unit comprises rigid case suspended to industrial building ceiling by means of hooks and cables. Acoustic absorbing material covered with netted capron tissue is placed in the case. The case has cylindrical shape and made as perforated cup with perforated lid. The case is provided with fixed central rod extending along case axis. Round partitions are connected to the rod so that the partitions may be retained in place. The partitions define cavities filled with acoustic absorbing material covered with netted capron tissue. Acoustic absorbing material has any three-dimensional shape, for instance, spherical shape.

EFFECT: increased efficiency.

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