SOUNDPROOFING ENCLOSURE Russian patent published in 2018 - IPC F16P1/02 E01F8/00 

FIELD: acoustics.

SUBSTANCE: invention relates to noise reduction means. Sound-proof enclosure contains casing mounted on vibration-proof support made in form of box-like frame. Between frame walls is a sound-absorbing structure. Casing loosely rests on shelves, placed between frame walls along the support perimeter. Shock absorbers, made of soft rubber are fixed on the shelves. Lower part of the box is mounted on solid elastic gasket of sponge rubber and fixed to foundation with bolts and rubber-metal washers. Between box walls is a sound absorber consisting of oppositely located sound-absorbing elements rigidly fixed on support walls with formation of vent channel. Each of noise-absorbing elements is made in form of rigid wall and perforated wall, between which is two-layer combined sound-absorbing element. Layer adjacent to rigid wall is made sound-absorbing. Layer adjacent to perforated wall, is made of sound-reflecting material of complex profile with perforation consisting of uniformly distributed hollow tetrahedra.

EFFECT: increase in efficiency of noise suppression is achieved.

1 cl, 5 dwg