RU2578227C1 - Sound absorbing element - Google Patents

Sound absorbing element Download PDF

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Publication number
RU2578227C1
RU2578227C1 RU2014137353/03A RU2014137353A RU2578227C1 RU 2578227 C1 RU2578227 C1 RU 2578227C1 RU 2014137353/03 A RU2014137353/03 A RU 2014137353/03A RU 2014137353 A RU2014137353 A RU 2014137353A RU 2578227 C1 RU2578227 C1 RU 2578227C1
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RU
Russia
Prior art keywords
smooth
sound
absorbing
perforated
sections
Prior art date
Application number
RU2014137353/03A
Other languages
Russian (ru)
Inventor
Олег Савельевич Кочетов
Original Assignee
Олег Савельевич Кочетов
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Олег Савельевич Кочетов filed Critical Олег Савельевич Кочетов
Priority to RU2014137353/03A priority Critical patent/RU2578227C1/en
Application granted granted Critical
Publication of RU2578227C1 publication Critical patent/RU2578227C1/en

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B1/8409Sound-absorbing elements sheet-shaped
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8423Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8433Tray or frame type panels or blocks, with or without acoustical filling with holes in their face

Abstract

FIELD: acoustics.
SUBSTANCE: invention relates to industrial acoustics and can be used for machine drive noise reduction, for lining of manufacturing facilities and for other sound-absorbing structures. Sound absorbing element comprises a smooth and perforated surfaces between which there is a multilayer sound absorbing structure of a complex shape, which represents an alternation of solid and hollow sections. Solid sections are formed by smooth prismatic surfaces located perpendicular to the smooth and perforated surfaces and fixed to the smooth surface, as well as by two surfaces of a complex shape connected with them and inclined relative to the smooth prismatic surfaces, having a smooth surface on one side, and a toothy, or wavy surface on the other, or composed by spherical sections surface shape; at that, tops of teeth or protrusions are turned inside these surfaces, while the surfaces themselves are fixed on the perforated surface, and attached to the smooth surface there are prominent sound absorbing elements, for example, in the form of tetrahedrons.
EFFECT: invention allows to improve efficiency of sound absorption and reliability of the structure on the whole.
1 cl, 1 dwg

Description

The invention relates to industrial acoustics, and can be used to reduce the noise of the drive machines, facing industrial premises, and other sound-absorbing structures.
The closest technical solution to the technical nature and the achieved result is a sound-absorbing element used as a facing of industrial premises, known from the RF patent No. 2463412 (prototype).
The disadvantage of the technical solution adopted as a prototype is the relatively low noise reduction due to the presence of voids between the layers, where there is no sound absorption between the layers of the sound absorber.
The technical result is an increase in the efficiency of sound attenuation and the reliability of the structure as a whole.
This is achieved by the fact that in a sound-absorbing element containing a smooth and perforated surface, between which a multilayer sound-absorbing structure is placed, the sound-absorbing structure is made in the form of smooth and perforated surfaces, between which a sound-absorbing structure of complex shape, which is an alternation of solid sections and hollow sections, is placed at this solid areas in turn are formed by smooth prismatic surfaces located perpendicular to the smooth and perforated surfaces and fixed to a smooth surface, as well as two surfaces of complex shape connected with them and inclined relatively smooth prismatic surfaces, having a smooth surface on the one hand and a tooth shape on the other, serrated, or wavy, or spherical, with the vertices the teeth or protrusions face these surfaces, and the surfaces themselves are fixed on a perforated surface, and embossed sound-absorbing surfaces are attached elements, for example in the form of tetrahedrons.
The drawing shows a diagram of a sound-absorbing element.
The sound-absorbing element contains a smooth 1 and perforated 2 surfaces, between which a multilayer sound-absorbing structure is placed.
The sound-absorbing structure is made of complex shape and is an alternation of solid sections 3 and hollow sections 4. Solid sections 3, in turn, are formed by smooth prismatic surfaces 5 located perpendicular to smooth 1 and perforated to 2 surfaces and fixed to smooth 1 surface, as well as two connected with them and inclined relatively smooth prismatic surfaces 5, surfaces 6 of complex shape, having on one side a smooth surface, and on the other hand a serrated, or a flat, or spherical shape (not shown in the drawing) surface, the tops of the teeth or protrusions facing inward of these surfaces, and the surfaces themselves are fixed on a perforated 2 surface. Embossed sound-absorbing elements 7 are attached to the smooth surface 1, for example, in the form of tetrahedrons.
A material based on aluminum-containing alloys was used as a sound-absorbing material, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following strength properties: compressive strength in the range of 5 ... 10 MPa, tensile strength bending within 10 ... 20 MPa, for example foam aluminum.
Rockwool type mineral wool or URSA type mineral wool or P-75 type basalt wool or glass wool lined with glass wool or foamed polymer, such as polyethylene or polypropylene.
The material of the perforated surface is made of solid, decorative vibration-damping materials, for example, agate, antivibrate, and shvim plastic compounds, and the inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, such as fiberglass type EZ-100 or "Poviden" type polymer.
It is possible that the hollow sections 4 are filled with sound-absorbing material, for example, construction foam.
Sound-absorbing element operates as follows.
Sound energy, passing through a layer of perforated surface 2 and a third layer 8 of a sound-absorbing element made of foamed sound-absorbing material, falls on an intermittent sound-absorbing layer 4 located at the focus of a continuous profiled layer 3, where the primary dissipation of sound energy occurs. Then, the sound energy enters the continuous profiled layer 3 of sound-absorbing material formed by spherical surfaces forming a solid dome-shaped profile, and focusing the reflected sound onto a soft sound absorber 4. Here, the sound energy is converted into heat (dissipation, energy dissipation), i.e. in the pores of the sound absorber, which are the Helmholtz resonator model, there are energy losses due to friction, which fluctuates with the excitation frequency of the mass of air in the resonator neck against the walls of the neck itself, which has the form of an extensive network of micropores of the sound absorber. The perforation coefficient of the perforated surface 2 is taken to be equal to or more than 0.25.

Claims (1)

  1. A sound-absorbing element containing smooth and perforated surfaces, between which a multilayer sound-absorbing structure is placed, the sound-absorbing structure is made in the form of smooth and perforated surfaces, between which a sound-absorbing structure of complex shape is represented, which is an alternation of solid sections and hollow sections, while solid sections in turn formed by smooth prismatic surfaces located perpendicular to a smooth and perforated surface and attached to a smooth surface, as well as two surfaces connected with them and inclined relatively smooth prismatic surfaces of complex shape, having on one side a smooth surface, characterized in that, on the other hand, a serrated, or wavy, or spherical sections formed surface, the tops of the teeth or protrusions are turned inside these surfaces, and the surfaces themselves are fixed on the perforated surface, and relief sound-absorbing elements are attached to the smooth surface You, for example, in the form of tetrahedra, while a material based on aluminum-containing alloys is used as a sound-absorbing material, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following strength properties: compressive strength in the range of 5 ... 10 MPa, bending strength in the range of 10 ... 20 MPa, for example, foam aluminum, or rockwool type mineral wool or URSA type mineral wool was used as sound-absorbing material of the second, softer layer or bases cotton wool of type P-75, or glass wool with glass fiber lining, or foamed polymer, such as polyethylene or polypropylene, and the material of the perforated surface is made of solid, decorative vibration-damping materials, such as plastic compound such as "Agate", "Anti-vibration", "Shvim", moreover the inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, such as fiberglass type E3-100 or polymer like Poviden, and the hollow areas are filled enes absorbing material, such as the construction and assembly foam.
RU2014137353/03A 2014-09-16 2014-09-16 Sound absorbing element RU2578227C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2014137353/03A RU2578227C1 (en) 2014-09-16 2014-09-16 Sound absorbing element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2014137353/03A RU2578227C1 (en) 2014-09-16 2014-09-16 Sound absorbing element

Publications (1)

Publication Number Publication Date
RU2578227C1 true RU2578227C1 (en) 2016-03-27

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RU2014137353/03A RU2578227C1 (en) 2014-09-16 2014-09-16 Sound absorbing element

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2645381C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Sound absorption element with resonant inserts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
DE102004037260A1 (en) * 2004-07-31 2006-03-23 Südluft Systemtechnik GmbH & Co. KG Sound-absorbing or sound-damping cassette structure and a method for cleaning such
RU2391468C2 (en) * 2005-01-27 2010-06-10 Штефан КРЕСТЕЛЬ Assembly construction element in form of beam, and also method and device for manufacturing of this construction element
RU2463412C2 (en) * 2010-08-20 2012-10-10 Олег Савельевич Кочетов Sound-absorbing structure of production room
RU2471935C1 (en) * 2011-09-20 2013-01-10 Олег Савельевич Кочетов Comfort structure of room

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
DE102004037260A1 (en) * 2004-07-31 2006-03-23 Südluft Systemtechnik GmbH & Co. KG Sound-absorbing or sound-damping cassette structure and a method for cleaning such
RU2391468C2 (en) * 2005-01-27 2010-06-10 Штефан КРЕСТЕЛЬ Assembly construction element in form of beam, and also method and device for manufacturing of this construction element
RU2463412C2 (en) * 2010-08-20 2012-10-10 Олег Савельевич Кочетов Sound-absorbing structure of production room
RU2471935C1 (en) * 2011-09-20 2013-01-10 Олег Савельевич Кочетов Comfort structure of room

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2645381C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Sound absorption element with resonant inserts

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