METHOD OF PROVIDING THE ACOUSTIC COMFORTABLE ROOM Russian patent published in 2018 - IPC E04B1/84 

FIELD: acoustics.

SUBSTANCE: invention relates to industrial acoustics, particularly, to broadband acoustic suppression, and can be used in all national economy industries as a means of protection from noise. According to the method of providing an acoustically comfortable room, the bearing walls are lined with sound-absorbing structures, and also install single sound absorbers, in which sound-absorbing material is placed, and install them over noisy equipment. For certain dependencies, octave levels of sound pressure are determined, taking into account the maximum possible sound absorption before installation of sound-absorbing structures in the workshop at workplaces in the direct sound zone. Sound absorbing device is spherical, containing sound absorbers of active and reactive types, placed on a rigid frame, the skeleton is made spherical with an internal congruent framework by a spherical resonance cavity formed by a rigid continuous spherical shell, an equidistant outer perforated spherical shell. Space between the spherical shells is filled with sound absorbing material, and the connection of the outer perforated spherical shell with the object, for example, the ceiling of the production room, are made by means of an elastic damping element and are pivotally connected to a suspension in the form of a rod, one end of which is connected to a hinge mounted on the resilient damping element, and the other with a ring designed to fix it to the object, and the spherical resonance cavity is rigidly connected to at least one sleeve with an axial hole serving as a neck of the Helmholtz resonator, with an outer perforated spherical shell, and the space between them is filled with a sound absorber. Bearing walls are lined with a sound-absorbing structure, which is performed in the form of a rigid and perforated wall, between which is a multilayer sound-absorbing element, which is made in the form of two layers: one of which, adjacent to the rigid wall, is sound-absorbing, and the other, adjacent to the perforated wall, is made with a perforation from a sound reflecting material of a complex profile consisting of uniformly distributed hollow tetrahedrons.

EFFECT: technical result is the increased efficiency of noise suppression.

1 cl, 6 dwg