FIELD: industrial acoustics, particularly broadband noise reduction of industrial equipment.
SUBSTANCE: conical acoustic absorbing member comprises rigid cage suspended to industrial building ceiling by cables. The cage is filled with sound-absorbing material covered with caprone netting. The cage is made as cone and provided with semi-sphere fastened to lower cage flange. The sound-absorbing material may be placed in the case so that air cavities are formed around semi-sphere perimeter and inside the semi-sphere. The air cavities are arranged in staggered order along three perpendicular planes. Height/diameter ratio of acoustic absorbing member is H:D=2:1 ÷ 2:0.5.
EFFECT: increased sound absorbing efficiency due to extended frequency range and improved performance.
1 cl, 1 dwg
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