RU2648733C2 - Device for acoustic protection of operator - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to means of safety of operation of operators in emergency situations, particularly at high levels of noise. Device for acoustic protection of operator comprises operator workstation, equipped with means of reducing noise. Operator workstation is located between acoustic shields, which protect operator from direct sound propagating from vibration active equipment. Above working zone there is suspended ceiling, arranged in upper zone of room. To reduce sound vibration operator workstation is equipped with floor on elastic base providing two staged protection of operator. Also there is rocker acoustic absorber, which consists of rigid frame suspended by hooks on ropes to building ceiling with sound absorbing material wrapped in mesh caproic fabric located inside frame. Expanded stretching steel sheet is fixed to frame. Frame is made in the form of a rectangular parallelepiped. Structure of the wall soundproof panel installed on the ceiling consists of a sound-absorbing plate of the Shumanet-ECO type (50 mm); gypsum fibre sheet 12.5 mm; gypsum board sheet 12.5 mm; profile type Vibronet PN 100/40; Vibrostec-M (2 layers); Vibrosil sealant, SHUMANET-BM boards are used as an effective middle layer in the construction of sound-proof frame partitions or linings made from plasterboard/gypsum board, chipboard, plywood sheets, and also in systems of acoustic perforated screens or suspended ceilings. When installing sandwich panels, a VIBROSTEK-M strip lining is used, which is laid in two layers in places where they are supported on the floor. Also in the places of contact of panels with side walls and ceiling during installation Vibrosil sealant is used: single-component vibration-insulating silicone sealant for sealing joints and joints in special soundproofing structures, and as vibration-insulating wall fasteners - VIBROFLEX - a cushioning device for solving problems of noise reduction and vibration transmission in premises of any type and purpose. For mounting to vertical enclosing structures wall versions of ER type fasteners, which is microporous polyurethane elastomer, especially for solving tasks of sound and vibration insulation. Acoustic enclosures are made in the form of rigid and perforated walls, between which are layers of sound-reflecting, and sound-absorbing materials of different density, arranged in two layers. Layers of the sound-reflecting material are made with a complex profile consisting of uniformly distributed hollow tetrahedra that allow to reflect sound waves incident in all directions and which are located respectively at the rigid and perforated walls. Layers of the sound-reflecting material are made of a heat-insulating material capable of supporting a given microclimate in the room, and in the central part of the enclosure there is a resonant cavity, bounded by solid walls of rigid vibration-damping material, in which there are holes, performing the function of the neck of a Helmholtz resonance cavity.

EFFECT: invention allows to improve efficiency of noise suppression.

1 cl, 8 dwg, 1 tbl

Description

The invention relates to safety equipment for operators in emergency situations, in particular at elevated noise levels.

Known low-noise structures for industrial buildings in the form of acoustic cladding and piece sound absorbers, the cavities of which are filled with sound-absorbing material [1, 2, 3, 4, 5]. Currently, fibrous sound absorbers are the most common in construction practice.

The disadvantages of the known designs of sound absorbers are their relatively low efficiency at low and medium frequencies, and they do not meet the increased requirements for the design of premises and the seismic resistance of structures under construction.

Low-noise cabins are known, which are lined with sound-absorbing structures, window and door openings, as well as piece sound absorbers containing a frame in which sound-absorbing material is located and installed above noisy equipment [6, 7, 8].

Their disadvantage is the relatively low noise attenuation efficiency at high frequencies, due to the lack of circuit designs containing Helmholtz resonators in structural elements.

Known low-noise earthquake-resistant industrial buildings containing basic load-bearing floor slabs are equipped in places of their attachment to the building's bearing walls with a spatial vibration isolation system consisting of horizontally located vibration isolators that accept vertical static and dynamic loads, as well as vertically located vibration isolators that accept horizontal static and dynamic loads [ 9, 10].

The disadvantages of the known building designs are their relatively low efficiency at low and medium frequencies, and they do not meet the increased requirements for the seismic resistance of structures under construction.

The closest technical solution to the technical nature and the achieved result is a low-noise building according to RF patent No. 129125 [11] for a utility model, the base of the building frame of which is made with vibration isolation of a reinforced concrete slab consisting of interconnected reinforced concrete beams at the base of the building.

The disadvantages of this device are the relatively low noise reduction efficiency at low and medium frequencies, as well as the relatively low damping at resonant frequencies in vibration isolation systems, and as a result, the relatively low seismic resistance.

The technical result is an increase in the efficiency of noise reduction.

This is achieved by the fact that in the operator’s acoustic protection device containing the operator’s workplace located between the acoustic screens and the acoustic suspended ceiling, the operator’s workplace is equipped with a floor on an elastic base in the upper area of the room to reduce sound vibration, while the operator performs two-stage vibration protection, acoustic barriers are made in the form of rigid and perforated walls, between which are layers of sound-reflecting, as well as sound-absorbing materials of different densities and located in two layers, the layers of sound-reflecting material made of a complex profile, consisting of uniformly distributed hollow tetrahedrons, which allow reflecting sound waves incident in all directions, and which are located respectively at the rigid and perforated walls, while the layers of sound-reflecting material are made of heat-insulating material capable of maintaining a given microclimate indoors, acoustic fences are made in the form of rigid and perforated walls, between which races layers of sound-reflecting and sound-absorbing materials of different densities are arranged, arranged in two layers, the layers of sound-reflecting material made of a complex profile, consisting of uniformly distributed hollow tetrahedrons, which allow reflecting sound waves incident in all directions, and which are located respectively at the rigid and perforated walls, while the layers of sound-reflecting material are made of heat-insulating material that can maintain a given microclimate in the room, in the central hydrochloric side fences resonant cavity is formed, bounded by solid walls of a rigid vibration damping material in which holes are made, the functions operating on the neck of the Helmholtz resonance cavity.

Figure 1 shows a General view of the device for acoustic protection of the operator, figure 2 - the floor structure of the premises on an elastic base, figure 3 - shock absorbing structure for installing a wall panel, figure 4 - structure of a wall sound-absorbing panel mounted on the ceiling , Fig.5 is a design of rocker sound absorbers, Fig.6 is a graph of the sound absorption efficiency of the applied panels, Fig.7 and 8 are options for wall sound absorbing panels.

The device for acoustic protection of the operator (Fig. 1) comprises a building frame made in the form of an elastic base 1, which is the floor of the room (Fig. 2), heat and sound insulating barriers 2, rigidly connected to columns 3, which in turn are connected to the metal structure 4, for example in the form of a farm. An acoustic suspended ceiling 5 is placed in the zone of the trusses 4, and is made in the form of rocker sound absorbers installed with a certain pitch, the lower part of which protrudes from the bottom of the trusses 4 towards the base 1. Acoustic wall panels 6 are fixed to the fences 2 (Fig. 3). On the elastic base 1 of the room installed vibroacoustic equipment 7 and 8 with different spectral characteristics of sound power levels. The operator’s workstation 15, including control panels 16 and 17 of equipment 7 and 8, is located between the acoustic screens 9 and 11, and in one of them, for example, on the 9th, a soundproof inspection hatch 10 is made to control visualization of observation of the process. The building frame is closed from above with a soundproof coating 12, which also functions as a roof, in which there are vertical 13 and inclined 14 window openings in the form of vacuum soundproof glass packets.

The floor structure on an elastic base (Fig. 2) contains a mounting plate 18 made of concrete reinforced with vibration damping material, which is installed on the base plate 19 of the floor with cavities 20 through layers of vibration damping material 21 and waterproofing material 22 installed with a gap relative to the bearing walls 23 production premises. In order to ensure effective vibration isolation of the mounting plate 18 in all directions, the layers of the vibration damping material 21 and the waterproofing material 22 are made with a flange that is closely adjacent to the supporting structures of the walls 7 and the base supporting plate 19 of the floor. To increase the efficiency of sound insulation and sound absorption in the workshops located under the floor, the cavities 20 are filled with vibration damping material, for example, foamed polymer, or polyethylene, or polypropylene.

The floor structure on an elastic base works as follows. When installing the vibroactive equipment 7 and 8 on the plate 18, a two-stage vibration protection occurs due to vibration damping inclusions in the mass of the plate 18, as well as due to the layer of vibration damping material 21, which can be used: needle-punched mats of the type “Vibrosil” based on silica or aluminoborosilicate fiber, a material made of solid vibration-damping materials, for example, plastic, from soundproofing plates based on glass staple fiber of the “Shumostop” type with a material density of 60 ÷ 80 kg / m ³ .

The transition of sound energy into thermal energy (dissipation, energy dissipation) occurs in the pores of sound-absorbing material, which is a Helmholtz resonator model, where energy losses occur due to friction of the mass of air in the resonator neck oscillating with the excitation frequency against the neck wall itself, having the form branched pore network of sound-absorbing material. Moreover, needle-punched mats consist of fibers having a diameter not lower than the maximum permissible hygienic value, do not contain carcinogenic asbestos and ceramic fibers, and such harmful binders as phenol are not included in their composition. Therefore, with confidence they can be attributed to the class of heat and sound insulating materials that meet high hygienic and fire safety requirements. We add that fiberglass materials have low thermal conductivity, are not influenced by steam, oil, water, and have high temperature stability.

Acoustic wall panels can be made in the form of slabs of rockwool basalt mineral wool, or URSA mineral wool, or P-75 basalt wool, or glass wool lined with glass wool, or foamed polymer, such as polyethylene or polypropylene moreover, the sound-absorbing element over its entire surface is lined with an acoustically transparent material, such as fiberglass type E3-100 or polymer type "Poviden."

Acoustic fencing (Fig.7) can be made in the form of rigid 30 and perforated 35 walls, between which are layers of sound-reflecting 31, 34, as well as sound-absorbing 32, 33 materials of different densities, located in two layers, and the layers of sound-reflecting material are made of a complex profile , consisting of uniformly distributed hollow tetrahedra, allowing to reflect sound waves incident in all directions, and which are located respectively at a rigid 30 and perforated 35 walls.

The layers of sound-reflecting material can be made of heat-insulating material that can maintain a given microclimate in the room due to the fact that it delays the loss of heat coming from the room through the perforated walls 35, and also does not allow the flow of cold air outside through the hard walls 30.

A variant is possible (Fig. 8) when a resonant cavity 36 is made in the central part of the enclosure, bounded by solid walls 37 and 38 of rigid vibration-damping material, in which holes 39 are made that serve as the neck of the Helmholtz resonance cavity.

A device for acoustic protection of the operator operates as follows.

The operator’s workplace 15 is placed between the acoustic screens 9 and 11, and protects the operator from direct sound that is spreading from the vibroactive equipment 7 and 8. In order to increase the effectiveness of protection from reflected sound waves above the work area (workplace), an acoustic suspended ceiling is installed 5, located in the upper zone of the room (farm zone 4). It reduces the levels of sound waves emanating from equipment 7 and 8 due to the multiple reflection of sound waves from the rocker sound absorbers. To reduce sound vibration, the operator’s workplace is equipped with a floor on an elastic base. When installing the vibroactive equipment 7 and 8 on the plate 18, a two-stage vibration protection occurs due to vibration damping inclusions in the mass of the plate 18, as well as due to the layer of vibration damping material 21, which can be used: needle-punched mats of the type “Vibrosil” based on silica or aluminoborosilicate fiber, a material made of solid vibration-damping materials, for example, plastic, from soundproofing plates based on glass staple fiber of the “Shumostop” type with a material density of 60 ÷ 80 kg / m ³ .

Indoors, where the area of open brick, plaster, concrete, tile, glass, metal is large, a long echo is always heard. If in such rooms there are several sources of sound (people's conversation, music, industrial noises), then direct sound is superimposed on its loud first reflections, which leads to speech illegibility and an increased noise level in the room. To reduce or correct the reverberation time of premises, sound-absorbing materials and structures (sound absorbers) are used in its decoration.

From an acoustic point of view, sound absorbers can be divided into the following groups: porous (including fibrous); porous with perforated screens; resonant; layered structures; piece or volume.

Porous sound absorbers are made in the form of plates that are attached to the enclosing surfaces directly or on the basis of light and porous mineral piece materials - pumice, vermiculite, kaolin, slag, etc. with cement or other binder. Such materials are strong enough and can be used to reduce noise in corridors, foyers, staircases of public and industrial buildings.

Material, object 125 250 500 1000 2000 4000 Unpainted concrete 0.01 0.012 0.016 0.019 0.023 0.035 Painted concrete 0.009 0.011 0.014 0.016 0.017 0.018 Marble 0.01 0.01 0.01 0.013 0.015 0.017 Brick unpainted 0.024 0.025 0.031 0.042 0.049 0.07 Painted brick 0.012 0.013 0.017 0.02 0.023 0.025 Gypsum plaster 0.02 0.026 0.04 0.062 0.058 0.028 Lime plaster 0.024 0.046 0.06 0.085 0.043 0.056 Fiberboard (MDF), 12 mm 0.22 0.3 0.34 0.32 0.41 0.42 Gypsum panel 10 mm to 100 mm from the wall 0.41 0.28 0.15 0.06 0.05 0.02 Parquet floor 0.04 0.04 0.07 0.06 0.06 0.07 Boardwalk Floor 0.2 0.15 0.12 0.1 0.08 0.07 Metlakh tile 0.01 0.01 0.02 0.02 0.02 0.03 Glazed Window Bindings 0.35 0.25 0.18 0.12 0.07 0.04 Lacquered Doors 0.03 0.02 0.05 0.04 0.04 0.04 Wool carpet 9 mm thick for concrete 0.02 0.08 0.21 0.26 0.27 0.37

The raw materials for their production are wood fibers, mineral wool, glass wool, synthetic fibers. The surface of the fibrous absorbers is treated with special porous paints that allow air to pass through (for example, Acutex T) or coated with breathable fabrics or non-woven materials, such as Lutrasil.

Currently, fibrous sound absorbers are the most common in construction practice. They not only proved to be the most effective from an acoustic point of view in a wide frequency range, but also meet the increased requirements for room design.

In fibrous absorbers, the dissipation of the energy of air vibrations and its transformation into heat occurs at several physical levels. Firstly, due to the viscosity of the air, and there is a lot of it in the interfiber space, the oscillation of air particles inside the absorber leads to friction. In addition, there is air friction on the fibers, the surface of which is also large. Thirdly, the fibers rub against each other and, finally, energy dissipation occurs due to the friction of the crystals of the fibers themselves. This explains that at medium and high frequencies the sound absorption coefficient of fibrous materials is in the range of 0.4 ... 1.0.

Recall that the sound absorption coefficient α is equal to the ratio of the energy of the air vibrations not reflected (absorbed inside and passed through) from the surface to the total energy acting on the surface. Sound absorption coefficients for most building materials are shown in Table 1. Fibrous and porous materials are used mainly to improve acoustic performance in cinemas, theaters, concert halls, studios, and auditoriums. In addition, they are used to reduce noise in kindergartens, schools, hospitals, restaurants, offices, retail halls, lobbies, waiting rooms, industrial premises.

The operator’s workstation 15 is reliably protected both from the acoustic load on the operator and from mechanical factors of the production environment, such as, for example, shavings in the workshop, or moving parts of the equipment.

Sound energy from the equipment 7 and 8 located in the room, passing through the perforated wall of the acoustic wall panels 6, falls on the layers of sound-absorbing material (which can be soft, for example, from basalt or glass fiber, or hard, for example, shell rock). The transition of sound energy into thermal energy (dissipation, energy dissipation) occurs in the pores of a sound absorber, which are the Helmholtz resonator model, where energy losses occur due to friction of the mass of air in the resonator neck oscillating with the excitation frequency against the neck wall, which has the form of a branched sound absorber pore network. The perforation coefficient of the perforated wall is taken to be equal to or more than 0.25. To prevent the eruption of a soft sound absorber, a fiberglass fabric, for example, type EZ-100, is located between the sound absorber and the perforated wall. In this case, the acoustic suspended ceiling 5, located in the upper zone of the room (farms zone 4), reduces the levels of sound waves emanating from equipment 7 and 8, and the operator’s workstation 15, located between the acoustic screens 9 and 11, is reliably protected as from acoustic load on the operator, and on the mechanical factors of the production environment, such as, for example, shavings in the workshop, or moving parts of the equipment.

Figure 4 presents the design of the wall sound-absorbing panel mounted on the ceiling, which consists of a 24-sound-absorbing plate type Schumanet-ECO (50 mm); 25-sheet gypsum fiber 12.5 mm; 26-sheet drywall 12.5 mm; 27-profile type Vibronet PN 100/40; 28-type gasket Vibrostek-M (2 layers); 29 Vibrosil type sealant.

Sound-absorbing plate such as Schumanet-ECO or SHUMANET-BM: Sound-absorbing plate made of mineral wool. SHUMANET-BM slabs are used as an effective middle layer in the design of soundproofing frame partitions or claddings of sheets GKL / GVL, chipboard, plywood, as well as in systems of acoustic perforated screens or suspended ceilings. Composition: hydrophobized mineral wool slab based on basalt rocks. Dimensions: Plate length: 1000 mm. Plate width: 600 mm. Plate thickness: 50 mm. Physical characteristics: bulk density: 40 kg / m ³ . The number of plates in the package: 4 pcs. Amount of packaging: 2.4 m ² . Packing volume: 0.12 m3. Package weight: 5.5 kg.

Vibrostek-M is a tape packed from a soundproof fiberglass packed in a roll. Structural noise isolation is ensured by the elastic properties of the porous-fibrous structure of the material. This determines the stable physical and mechanical characteristics of the gasket under static and dynamic loads, as well as the preservation of the declared acoustic properties over a long service life.

VIBROSTEK-M is used as a cushioning material in building structures during the installation of a panel system, frame soundproofing partitions and cladding, as well as wooden floors and ceilings. Composition: multilayer soundproof fiberglass LB300, based on fiberglass type “C”. Vibroacoustic characteristics: dynamic modulus of elasticity Unit: 0.18 MPa at a load of 2 kPa, 0.35 MPa at a load of 5 kPa. Relative compression ratio of units: 0.25 at a load of 2 kPa, 0.35 at a load of 5 kPa.

When installing sandwich panels, the VIBROSTEK-M strip gasket is laid in two layers at the points of their support on the floor, as well as at the places where the panels come in contact with the side walls and the ceiling. When mounting frame partitions and claddings, the VIBROSTEK-M material is used between the frame profiles (fasteners) and the supporting building structures. VIBROSTEK-M material tapes are also used in the places where the cladding sheets of the partition (cladding) are adjacent to other building structures.

Vibrosil type sealant: VIBROSIL, a one-component vibration-isolating silicone sealant, is designed to seal joints and joints in special soundproof structures. Sealant provides high vibration isolation of joints between building structures. Reduces the spread of structural noise over them and, thereby, increases their own sound insulation. It is used to fill joints in the construction of soundproof (floating) floors, panel systems, frame soundproofing partitions and claddings. Composition: sealant is made on the basis of silicone resins and silicon-containing modifying additives.

Vibro-insulating wall mounts VIBROFLEX (Fig. 3) is a shock-absorbing device for solving problems of reducing noise and transmitting vibrations in rooms of any type and purpose. For mounting to vertical enclosing structures, wall versions of EP type fasteners have been developed. Scope: wall mounts are used for soundproofing wall cladding, vibration isolation of pipelines of engineering networks, ventilation ducts, suspended engineering equipment and other vibration-emitting units. Composition: the design is based on the unique Sylomer material - it is a microporous polyurethane elastomer specially developed for solving problems of sound and vibration isolation.

Sound energy from the equipment 11 located in the room, passing through the perforated wall 35 of the acoustic fences 1, 2, 3, 4, of the industrial building falls on the layers of sound-reflecting material of a complex profile, consisting of uniformly distributed hollow tetrahedrons, which allow reflecting sound waves incident in all directions , and which are located respectively at the rigid 30 and perforated 35 walls, and then onto the layers 32, 33 of soft sound-absorbing material of different densities located in two layers (for example, filled with basalt or glass fiber). The transition of sound energy into thermal energy (dissipation, energy dissipation) occurs in the pores of a sound absorber, which are the Helmholtz resonator model, where energy losses occur due to friction of the mass of air in the resonator neck oscillating with the excitation frequency against the neck wall, which has the form of a branched sound absorber pore network. The perforation coefficient of the perforated wall is taken to be equal to or more than 0.25. To prevent the eruption of a soft sound absorber, a fiberglass fabric, for example, type EZ-100, is located between the sound absorber and the perforated wall.

The composite rocker sound absorber (Fig. 5) consists of at least two parts of a rigid frame, pulled together by clamps and suspended by hooks on rails (not shown in the drawing) or directly attached to the ceiling of a production building. Inside the frame is a sound-absorbing material wrapped in a mesh nylon fabric or fiberglass. In some cases, expanded glass sheet (not shown) may be attached over the glass fabric 3 to the frame. The frame can be made in the form of a rectangular parallelepiped with dimensions of d × h × b ribs, the ratio of which lies in the optimal range of d: h: b = 2: 1: 0.5 or a cube with k × L rib size, where min L = 100 mm; k is the coefficient of proportionality, lying in the range from 1 to 10 in steps of 2. Inside the wings, cavities not filled with sound-absorbing material can be made. For all suspension schemes, the optimum size ratios must be observed: m - from the point of suspension of the frame on the guide to the ceiling and c - the distance between the axes of adjacent frames, and the ratio of these sizes should be in the optimal range of values: m: c = 1: 1 ... 0, 5: 1. The filling is carried out with a sound-absorbing non-combustible material (for example, vinipore, fiberglass) with a protective layer of fiberglass, preventing the sound absorber from falling out.

Rocker sound absorber works as follows.

Sound waves propagating in the production room interact with cavities filled with sound absorber. Sound absorption at low and medium frequencies occurs due to the acoustic effect constructed on the principle of Helmholtz resonators formed by cavities. Different volumes of resonant cavities are used to suppress sound vibrations in the required sound frequency range, as a rule large volumes to suppress noise in the low-frequency range, and small ones in the medium and high frequencies.

The proposed method of acoustic protection is an effective way to combat industrial noise.

Literature

1. Kochetov O.S., Sazhin B.S. Noise and vibration reduction in production: theory, calculation, technical solutions. M .: MSTU im. A.N. Kosygina, 2001 .-- 319 p. (Fig. P. III.10, p. 263).

2. Kochetov OS Textile vibroacoustics. Textbook for universities. M .: MSTU im. A.N. Kosygina, the group "Sauvage Bevo" 2003. - 191 p. (Fig. A.2, p. 176).

3. Kochetov OS Laboratory workshop on industrial sanitation. Textbook for universities. M .: MSTU im. A.N. Kosygina, the group "Sovezh Bevo" 2004. - 168 p. (Fig.6.6, p. 120).

4. Kochetov O.S. Sound-absorbing structures to reduce noise in the workplace of industrial premises. The journal "Labor safety in industry", No. 11, 2010, pp. 46-50 (Fig. 1; p. 48 and Fig. 2; p. 48).

5. Kochetov O.S. Sound-absorbing construction of the workshop // Patent for invention No. 2414565. Published 03/20/2011. Bulletin of inventions No. 8.

6. Kochetov O.S. The method of acoustic protection of the operator // Patent for invention No. 2431022. Published on October 10, 2011. Bulletin of inventions No. 28.

7. Kochetov OS, Stareeva M.O. Production room with low noise // Patent for invention No. 2425931. Published on August 10th, 2011. Bulletin of inventions No. 22.

8. Durnev R.A., Kochetov O.S., Ivanova O.Yu. Earthquake-resistant building // Utility Model Patent No. 120447. Published on September 20, 2012. Bulletin of inventions No. 26.

9. Durnev R.A., Kochetov O.S., Ivanova O.Yu., Avgutsevichs A.Kh. Earthquake-resistant construction // Utility Model Patent No. 123433. Published on December 27th, 2012. Bulletin of inventions No. 36.

10. Durnev R.A., Kochetov O.S., Ivanova O.Yu., Avgutsevichs A.Kh. Earthquake-resistant brick wall panel // Utility Model Patent No. 118331. Published on July 20, 2012. Bulletin of inventions No. 20.

11. Durnev R.A., Ivanova O.Yu., Kochetov O.S. Low noise earthquake-resistant industrial building // Utility Model Patent No. 129125. Published 06/20/2013. Bulletin of inventions No. 17.

Claims (1)

A device for acoustic protection of an operator, comprising an operator’s workstation equipped with noise reduction means, an operator’s workplace is located between acoustic screens that protect the operator from direct sound propagating from vibroactive equipment, and an acoustic suspended ceiling is installed above the workspace located in the upper area of the room , and to reduce sound vibration, the operator’s workplace is equipped with a floor on an elastic base, which provides two-stage vibration protection of the operator, as well as a rocker absorber is provided, which consists of a rigid frame suspended by hooks on cables to the building ceiling with sound-absorbing material located inside the frame wrapped in mesh nylon fabric, and expanded metal sheet is attached to the frame, and the frame is made in the form of a rectangular parallelepiped with edge sizes d × h × b, the ratio of which lies in the optimal range of d: h: b = 2: 1: 0.5 or a cube with the edge size k × L, where min L = 100 mm; k is a proportionality coefficient ranging from 1 to 10 in increments of 2, and for all suspension schemes, the optimal size ratios must be observed: m - from the point of suspension of the frame on the guide 6 to the ceiling and c - the distance between the axes of adjacent frames, the ratio of these size should be in the optimal range of values: m: c = 1: 1 ... 0.5: 1, use the design of the wall sound-absorbing panel mounted on the ceiling, which consists of a sound-absorbing plate of the Schumanet-ECO type (50 mm); gypsum sheet 12.5 mm; gypsum plasterboard sheet 12.5 mm; profile type Vibronet PN 100/40; gaskets like Vibrostek-M (2 layers); Vibrosil type sealant, SHUMANET-BM boards are used as an effective middle layer in the design of soundproofing frame partitions or claddings of sheets GKL / GVL, chipboard, plywood, as well as in systems of acoustic perforated screens or suspended ceilings; when installing sandwich panels, they use tape laying VIBROSTEK-M, which is laid in two layers at the places of their support on the floor, as well as at the places where the panels come into contact with the side walls and the ceiling, use Vibrosil type sealant: one-component vibration gold-plated silicone sealant for sealing joints and joints in special soundproofing structures, and VIBROFLEX as a vibration-insulating wall mount, a shock-absorbing device for solving problems of reducing noise and transmitting vibrations in rooms of any type and purpose, and wall-mounted for mounting to vertical enclosing structures mounting options of the EP type - microporous polyurethane elastomer, especially for solving problems of sound and vibration isolation, characterized in that the acoustic Citizens are made in the form of rigid and perforated walls, between which are layers of sound-reflecting and sound-absorbing materials of different densities, arranged in two layers, and the layers of sound-reflecting material are made of a complex profile, consisting of uniformly distributed hollow tetrahedrons, which allow reflecting sound waves incident in all directions , and which are located respectively at the rigid and perforated walls, while the layers of sound-reflecting material are made of heat-insulating material capable of maintaining a given microclimate in the room, and in the central part of the enclosure there is a resonant cavity bounded by solid walls made of hard vibration damping material, in which holes are made that serve as the neck of a Helmholtz resonant cavity.

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