WO2007040265A1 - Panneau insonorisant - Google Patents

Panneau insonorisant Download PDF

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Publication number
WO2007040265A1
WO2007040265A1 PCT/JP2006/319974 JP2006319974W WO2007040265A1 WO 2007040265 A1 WO2007040265 A1 WO 2007040265A1 JP 2006319974 W JP2006319974 W JP 2006319974W WO 2007040265 A1 WO2007040265 A1 WO 2007040265A1
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WO
WIPO (PCT)
Prior art keywords
soundproof panel
sound
sound absorbing
case
facing direction
Prior art date
Application number
PCT/JP2006/319974
Other languages
English (en)
Japanese (ja)
Inventor
Tadashi Hatayama
Zenzo Yamaguchi
Ichiro Yamagiwa
Toshimitsu Tanaka
Kensuke Tsubota
Original Assignee
Kabushiki Kaisha Kobe Seiko Sho
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 Kabushiki Kaisha Kobe Seiko Sho filed Critical Kabushiki Kaisha Kobe Seiko Sho
Publication of WO2007040265A1 publication Critical patent/WO2007040265A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
    • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, 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
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, 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
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8428—Tray or frame type panels or blocks, with or without acoustical filling containing specially shaped acoustical bodies, e.g. funnels, egg-crates, fanfolds
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, 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
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, 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
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8442—Tray type elements

Definitions

  • the present invention relates to an improvement in a soundproof panel and a soundproof wall. More specifically, the present invention is highly recyclable and lightweight, and absorbs noise in a wide frequency band over a high frequency band. The present invention relates to a soundproof panel that can be used.
  • a sound absorbing structure As a sound absorbing structure, a structure in which a porous sound absorbing material such as glass wool and a material excellent in weather resistance, water resistance, and heat resistance has been used. However, with such a sound absorbing structure, the weather resistance, water resistance, and heat resistance of glass wool could be compensated, but this was not sufficient, and it did not solve the problem of recyclability. In addition, when using a resonator type sound absorbing structure or a plate vibration type sound absorbing structure that is a sound absorbing structure other than the case where a porous sound absorbing material typified by Dallas wool is used, due to the sound absorbing mechanism, the following There was a problem like this.
  • the sound absorption mechanism is energy dissipation due to a resonance phenomenon
  • the sound absorption performance with a narrow sound absorption frequency band is inferior to that of a porous sound absorbing material such as a porous sound absorbing material such as glass wool.
  • Patent Document 1 and 2 As a sound absorbing structure capable of solving the above-mentioned problems, for example, an aluminum foil or a structure having a configuration as described later using an aluminum thin plate is known (for example, Patent Document 1 and 2).
  • Patent Documents 1 and 2 The sound absorbing structures according to Patent Documents 1 and 2 will be described with reference to the attached drawings.
  • a soundproof structure according to Patent Document 1 will be described with reference to FIG. 14 in a perspective view and FIG. 15 in a sectional view. That is, in this sound absorbing structure, a first thin film 41 made of a metal thin film such as an aluminum foil and a second thin film 42 are laminated so as to be adjacent to each other. As shown in FIG. 15, the first thin film 41 and the second thin film 42 have a large number of protrusions a directed to one side in the stacking direction of the first thin film 41 and the second thin film 42. Is formed. Therefore, according to the soundproof structure according to Patent Document 1, when a sound wave is incident, the first and second thin films 41 and 42 vibrate, and the overlapped portions come into contact with each other and rub against each other. Result, sonic The energy dissipation occurs and the sound is absorbed.
  • the sound absorbing structure configured as described above, as described above, since the first and second thin films 41 and 42 are in contact with each other and rub against each other, the sound wave energy is dissipated. Compared to the sound absorbing structure to be used, it can exhibit excellent sound absorbing performance in a wider frequency band. In addition, by adopting a metal foil such as aluminum as the material of the first and second thin films 41 and 42, it is difficult to recycle the conventional sound absorbing glass wool that has to be disposed of as shredder dust. The sound absorbing structure is easier to recycle than the material.
  • the first and second thin films 41 and 42 are provided with many fine through holes!
  • this soundproof structure is configured such that the exterior plate 51 and the interior plate 52 having a large number of through holes 52a are arranged to face each other.
  • the interior plate 52 is set so that the plate thickness, the hole diameter, and the opening ratio satisfy a design condition to be described later that causes a viscous action to occur in the air flowing through the through hole 52a.
  • the frequency bandwidth with a sound absorption coefficient of 0.3 or more is set to 10% or more with respect to the resonance frequency.
  • Reference numeral 53 denotes an air layer.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-264374
  • Patent Document 2 Japanese Patent Laid-Open No. 2003-50586
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a soundproof panel that can exhibit excellent sound absorbing performance in a wide frequency band and that can easily be recycled. And
  • the present invention is a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and allows sound waves to pass therethrough.
  • a case having a front plate provided with a plurality of sound wave passages to be obtained, and a sound absorbing member housed in the case, wherein the sound absorbing member intersects the opposing direction of the back plate and the front plate, and And a plurality of metal members stacked in the facing direction, each of which has a large number of fine through holes penetrating in the facing direction and has a wave from a viewpoint in a specific direction perpendicular to the facing direction.
  • a cross-sectional shape to be a mold is formed in a corrugated shape extending in the specific direction, and each metal member is stacked in the facing direction with the tops of the corrugated shape in contact with each other.
  • the metal members are laminated so that the tops of the plurality of metal members formed in a corrugated shape are in contact with each other.
  • An air layer can be formed between the two. Therefore, when sound waves enter this soundproof panel, a resonance phenomenon of sound waves occurs in the air layer, and the air in a large number of fine through holes opened in these metal members vibrates violently, resulting in penetration caused by the viscosity of the air.
  • the sound absorption effect is exerted in a wide frequency band centered on the air frequency, and a wide frequency range including the resonance frequency Excellent sound absorption performance against noise
  • the sound absorbing member is also formed of a metal member, the shredder Recycling is easier compared to difficult-to-recycle materials such as glass wool with a sound-absorbing structure that has had to be disposed of as a single dust.
  • the present invention is a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave.
  • a case having a front plate provided with a plurality of sound wave passages that can pass through, and a sound absorbing member housed in the case, wherein the sound absorbing member intersects the opposing direction of the back plate and the front plate.
  • a plurality of first metal members and second metal members arranged in such a manner that each of the first metal members has a large number of fine through-holes penetrating in the facing direction.
  • the first metal member having the corrugated cross-sectional shape and the second metal member having the flat surface are alternately laminated, so that the top portion of the corrugated cross-sectional shape is formed on the flat surface.
  • an air layer can be formed between the corrugated recess and the flat surface of each metal member. Therefore, when a sound wave enters the soundproof panel, a resonance phenomenon of the sound wave occurs in the air layer, and the air in a large number of fine through holes opened in these metal members vibrates violently and is caused by the viscosity of the air. Sound energy is converted into thermal energy by friction with the inner surface of the through-hole. As a result, the sound absorption effect is exerted in a wide frequency range centered on the air frequency, including the resonance frequency! Exhibits excellent sound absorption performance against component noise.
  • the sound absorbing member since the sound absorbing member has the first and second metal member forces, the glass sound having the conventional sound absorbing structure that has to be disposed of as shredder dust or the like can be used. Recycling is easier compared to difficult-to-recycle materials.
  • the present invention is a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave.
  • a case having a front plate having a plurality of sound wave passages that can pass through, and a suction member housed in the case.
  • a sound member, and the sound absorbing member includes a plurality of metal members that intersect with a facing direction of the back plate and the front plate and are stacked in the facing direction.
  • a cross-sectional shape that is corrugated from the viewpoint of a specific direction orthogonal to the direction includes a corrugated portion extending in the specific direction, and a flat portion having a flat surface in the opposite direction, and the flat portion is V is laminated in the facing direction in a state where the corrugated portion of the adjacent metal member of the adjacent partner is in contact with the flat portion of the adjacent metal member of the adjacent counterpart.
  • a plurality of metal members each having a corrugated part and a flat part are laminated, so that the corrugated part and the opposing flat part are in contact with each other and the flat part and the opposing wave are in contact with each other.
  • an air layer can be formed between the corrugated concave part and the flat part of each metal member. For this reason, when sound waves enter the soundproof panel, a resonance phenomenon of sound waves occurs in the air layer, and the air in a large number of fine through holes opened in these metal members vibrates violently, resulting from the viscosity of the air.
  • the sound absorbing member is also composed of a metal member, so that it is difficult to recycle such as glass wool having a sound absorbing structure according to the related art that has to be disposed of as shredder dust or the like. Recycling is easier compared to
  • the present invention provides a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave.
  • a case having a front plate provided with a plurality of sound wave passages that can pass through, and a sound absorbing member housed in the case, wherein the sound absorbing member intersects the opposing direction of the back plate and the front plate.
  • a soundproofing panel characterized in that the soundproofing panels are spaced apart in the facing direction.
  • air layers are respectively formed between the metal member and the back plate and the front plate. Therefore, a sound wave resonance phenomenon occurs in this air layer, and the air in a large number of fine through holes opened in these metal members vibrates violently, resulting in the space between the inner surface of the through holes caused by the air viscosity.
  • sound wave energy being converted into thermal energy by friction, it exhibits sound absorption performance over a wide frequency bandwidth centered on air frequency, and excellent sound absorption performance for noise of a wide frequency component including the resonance frequency Demonstrate.
  • the sound absorbing member is also composed of a metal member, it is difficult to recycle the conventional sound absorbing structure such as glass wool, which has to be disposed of as shredder dust or the like. Recycling is easier compared to
  • FIG. 1 is a front view of a soundproof wall according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic front view of a soundproof panel used for a soundproof wall according to Embodiment 1 of the present invention.
  • FIG. 3 is a cross-sectional view taken along the line ⁇ - ⁇ of FIG.
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • Fig. 5 is a perspective view illustrating an assembled state of an aluminum sheet with an arcuate corrugated corrugated cover of an acoustical panel used in the soundproof wall according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic front view of a soundproof panel used for a soundproof wall according to Embodiment 4 of the present invention.
  • FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG.
  • FIG. 9 is a schematic cross-sectional view of a soundproof panel used for a soundproof wall according to Embodiment 6 of the present invention.
  • FIG. 10 is a schematic cross-sectional view of a soundproof panel used for a soundproof wall according to Embodiment 7 of the present invention.
  • FIG. 11 is an explanatory diagram of the oblique incidence sound absorption coefficient measurement test situation.
  • FIG. 12 is a graph for explaining the sound absorption rate of a soundproof wall using the soundproof panel shown in FIGS. 2 to 4.
  • FIG. 13 is a graph for explaining the sound absorption coefficient of the soundproof wall using the soundproof panel shown in FIG.
  • FIG. 14 is a perspective view of a soundproof structure according to a conventional technique.
  • FIG. 15 is a cross-sectional view of a soundproof structure according to a conventional technique.
  • FIG. 16 is a cross-sectional view of a soundproof structure according to a conventional technique.
  • FIG. 1 is a front view of a soundproof wall according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic front view of a soundproof panel used for the soundproof wall according to Embodiment 1 of the present invention
  • FIG. 3 is a ⁇ - ⁇ line of FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • Reference numeral 1 shown in FIG. 1 denotes a soundproof wall according to Embodiment 1 of the present invention, and 16 soundproof panels 2 having a configuration described later are used for the soundproof wall 1.
  • the soundproof panel 2 is made of aluminum and includes a rectangular case 2a (described later) and a sound absorbing member (described later) housed in the case 2a.
  • the case 2a detachably covers a rectangular frame portion 2b, a back plate 2c attached to one side of the frame portion 2b, and the opening side on the other side of the frame portion 2b, and allows sound waves to pass therethrough.
  • a front plate 2d having a thickness of 0.8 mm having a plurality of sound wave passages Pa.
  • the sound wave passage Pa is a through hole having a diameter of 0.8 mm.
  • the sound absorbing member has a corrugated cross-sectional shape extending in the vertical direction from the viewpoint of the case 2a in the vertical direction in the figure (a specific direction orthogonal to the opposing direction of the back plate 2c and the front plate 2d).
  • Corrugated aluminum sheet (metal member) 2f having a corrugated cross-sectional shape extending in the left-right direction and a number of fine through holes (not shown) penetrating in the opposite direction. Consists of alternating layers It has become.
  • the corrugated aluminum sheet has a three-layer structure, but is not limited to a three-layer structure, and may be a two-layer structure or a four-layer structure.
  • the number of layers of corrugated aluminum sheet should be determined by specifications.
  • the aluminum thin plate 2e with the vertical arc corrugation and the aluminum thin plate 2f with the horizontal arc corrugation are both 0.1 to 0.3 mm thick. It is.
  • the aluminum thin plate 2e with corrugated vertical arc and the aluminum thin plate 2f with corrugated horizontal arc have a large number of fine through-holes with a diameter of about 0.1 mm, for example, by rolling, and then height is formed by, for example, press molding. It was manufactured by applying an arc corrugated process with a dimension of 20mm.
  • Such a soundproof panel 2 is manufactured at a factory and then transported to the site and attached to a soundproof frame.
  • the soundproof wall 1 or the soundproof panel 2 according to the first embodiment of the present invention compared with the sound absorbing structure that dissipates the sound wave energy using only the resonance phenomenon, Excellent sound absorption performance can be exhibited in a wider frequency band.
  • the sound absorbing material uses the aluminum thin plate, so It is easier to recycle compared to difficult-to-recycle materials such as glass wool with a sound-absorbing structure that must be disposed of as redder dust.
  • FIG. 5 is a perspective view illustrating the assembled state of the aluminum sheet with arcuate inclined corrugations that has been arcuately corrugated. Note that the overall configuration of the soundproof wall according to the second embodiment using the soundproof panel is the same as that of the soundproof wall according to the first embodiment, and therefore the description of the soundproof wall configuration is omitted.
  • the sound absorbing member of the soundproof panel according to Embodiment 2 has a corrugated cross-sectional shape of the frame portion 2b.
  • a plurality of aluminum thin plates 2g with an inclined arc corrugation which are formed in a corrugated shape extending in a direction inclined with respect to each side, and provided with a number of fine through-holes. Waveforms are alternately stacked so as to cross each other between adjacent ones, and stored in a case (not shown).
  • the diameters of the numerous fine through-holes and the height of the arc corrugation of this thin arc-shaped corrugated aluminum thin plate 2g are set to the same values as in the above-described Embodiment 1.
  • the arcuate waveform is inclined to the soundproof wall according to the first embodiment by being added to the aluminum thin plate. It is only different from the soundproof panel used. Therefore, the soundproof panel used for the soundproof wall according to the second embodiment of the present invention has the same effect as the soundproof panel used for the soundproof wall according to the first embodiment.
  • the arc waveforms of the overlapping aluminum thin plates with arc-shaped corrugations intersect with each other and the tops are in contact with each other, but the arc waveforms of the aluminum thin plates with overlapping arc-shaped corrugations They do not have to cross each other.
  • the soundproof panel according to Embodiment 3 of the present invention is configured as described later.
  • the arc waveforms of the overlapping aluminum thin plates with arc-shaped corrugations that are not shown are oriented in the same direction, and the tops of the arc-shaped corrugations are in contact with each other.
  • FIG. 6 is a schematic front view of a soundproof panel used for a soundproof wall according to Embodiment 4 of the present invention
  • FIG. 7 is a sectional view taken along line VII-VII in FIG. 6
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG. .
  • the soundproof panel 3 used for the soundproof wall according to the fourth embodiment of the present invention has a case 3a having the same configuration as the case according to the first embodiment, and is housed in the case 3a. It is comprised from the sound-absorbing member mentioned later.
  • the sound absorbing member is a wave whose corrugated cross-sectional shape extends in the specific direction as viewed from the vertical direction of the case 3a (a specific direction orthogonal to the facing direction of the front plate 3d and the back plate 3c).
  • first metal member 3e provided with a large number of fine through-holes (not shown) penetrating into the aluminum plate (first metal member) 3e and an aluminum thin plate provided with a number of fine through-holes penetrating in the opposite direction ( (Second metal member) 3f and alternately stacked
  • the longitudinally corrugated aluminum thin plate 3e of the soundproof panel 3 used for the soundproof wall according to this embodiment 4 is formed into an aluminum thin plate having a thickness of 0.1 to 0.3 mm, for example, by roll rolling with a diameter of about 0.1 mm After a number of fine through-holes are drilled, a vertical arc corrugated force having a height dimension of 20 mm is applied, for example, by press molding, and is the same as in the case of the first embodiment.
  • the soundproof panel 3 used for the soundproof wall according to this form 3 is a force that employs an aluminum thin plate 3e with a vertical arc corrugation. With the horizontal arc waveform used for the soundproof panel used for the soundproof wall according to the above form 1. It can be replaced with an aluminum sheet.
  • an aluminum thin plate may be adhered to a shoji frame-shaped adhesive frame using a double-sided tape, and the adhesive frame in which the aluminum thin plate is adhered may be incorporated into the case.
  • a rectangular aluminum sheet mounting frame with the channel-shaped aluminum member facing the opening side is created, and the end of the aluminum sheet is inserted into the groove of the aluminum sheet mounting frame.
  • an aluminum sheet with a square rubber string may be attached to the aluminum sheet, and then install the aluminum sheet mounting frame with the aluminum sheet attached to the case.
  • a rectangular aluminum thin plate mounting frame may be prepared, and the aluminum thin plate may be wound around the aluminum thin plate mounting frame to make it endless, and then the aluminum thin plate mounting frame wound with the aluminum thin plate may be incorporated into the case.
  • an aluminum thin plate may be attached to an aluminum thin plate mounting frame, and an aluminum thin plate mounting frame with an aluminum thin plate attached may be incorporated into the case.
  • the soundproof panel 3 used for the soundproof wall according to the fourth embodiment of the present invention as in the case of the soundproof panel used for the soundproof wall according to the first embodiment, the arc waveform of the aluminum thin plate 3e with the vertical arc waveform And an air layer is formed between the aluminum thin plate 3f and the flat surface of the aluminum thin plate 3f, so that the sound wave resonance occurs, and the air that vibrates vigorously in the numerous fine through-holes formed in these corrugated aluminum thin plates.
  • the viscous energy dissipates sonic energy. Therefore, as in the case of Patent Document 1, it is possible to exhibit excellent sound absorbing performance in a wider frequency band than the sound absorbing structure that dissipates sound wave energy using only the resonance phenomenon. This is the same as the soundproof panel used for the soundproof wall according to Form 1.
  • a soundproof panel used for the soundproof wall according to Embodiment 5 of the present invention will be described. Note that the overall configuration of the soundproof wall using this soundproof panel is the same as that of the soundproof wall according to the first aspect, and therefore the description of the soundproof wall is omitted.
  • the sound absorbing member of the soundproof panel used for the soundproof wall according to the fifth embodiment is configured by alternately laminating two kinds of aluminum thin plates with circular corrugations described later.
  • portions corrugated portions
  • the central part is flat.
  • a large number of fine through holes are provided in the circular arc corrugated region (the corrugated portion) and the plane portion.
  • the other second arcuate corrugated aluminum sheet laminated on the first arcuate corrugated aluminum sheet is subjected to a plurality of arcuate corrugations in which the top part contacts the flat part of the first arcuate corrugated aluminum sheet.
  • the other four portions (flat portions) are flat.
  • a large number of fine through holes are provided in the arc corrugated region and the planar region.
  • an air layer is formed between the arcuate waveform of one of the first arcuate corrugated aluminum thin plates and the flat surface of the other second arcuate corrugated aluminum thin plate. And an air layer is formed between the arcuate waveform of the other second arc-shaped corrugated aluminum sheet and the flat portion of the one first arc-corrugated aluminum sheet. . Therefore, according to the soundproof panel used for the soundproof wall according to the fifth embodiment of the present invention, an air layer is formed between the arcuate waveform and the flat surface portion, so that a sound wave resonance phenomenon occurs, and these corrugated aluminum thin plates are formed. Since the sonic energy is dissipated by the viscous action of air that vibrates vigorously in a large number of fine through-holes that are opened, the fifth embodiment has the same effect as the first embodiment.
  • the sound-absorbing member of the soundproof panel according to Embodiments 1 to 5 of the present invention is a plate in which fibers are adhered to the surface, even if it is a force foil in which an arc-corrugated aluminum thin plate force is also configured. Alternatively, it may be a foil in which fibers are attached to a good surface.
  • the aluminum with arc corrugation is a sound absorbing member of the soundproof panel according to Embodiments 1 to 5 of the present invention.
  • the edge of the thin plate is attached to the inner wall of the case by any of the means described below.
  • An edge attachment member having a screw hole is provided at the edge of the aluminum corrugated thin aluminum plate, and the edge attachment member is fixed by a screw fitted in a hole provided in the case.
  • the edge of the aluminum corrugated thin aluminum plate is moved to the inner wall side of the case by an edge receiving member projecting from the inner wall of the case and a screw fitted in a hole provided in the case. It is fixed by an edge pressing member that presses the edge of the corrugated metal member received by the edge receiving member.
  • the waveform applied to the thin aluminum plate that is the sound absorbing member of the soundproof panel used for the soundproof wall of the highway is an arc waveform.
  • a case has been described as an example.
  • the waveform processed into the aluminum thin plate is not particularly limited to the arc waveform.
  • an aluminum sheet may be square-wave processed or trapezoidal waveform processed, or a triangular waveform processed, or any waveform that is acceptable. Can be demonstrated.
  • the soundproof panel 5 used for the soundproof wall according to the sixth embodiment of the present invention is made of aluminum including a rectangular case 5a and a sound absorbing member to be described later housed in the case 5a.
  • the case 5a detachably covers a rectangular frame portion 5b, a back plate 5c attached to one side of the frame portion 5b, and the opening side of the other side of the frame portion 5b, and allows sound waves to pass therethrough.
  • a front plate 5d having a plurality of sound wave passages Pa to be obtained.
  • the sound wave passage Pa is a through hole having a diameter of 0.8 mm.
  • the sound absorbing member includes three aluminum foils 5f provided with an air layer between the back plate 5c, the front plate 5d, and themselves. At the edges of these aluminum foils 5f, there are holes provided in corresponding positions on the upper and lower sides of the case 5a, respectively, with holes having a circular cross section along the longitudinal direction and grooves communicating with opposing side force holes. A round bar-like engaging member 5g that can be locked to the three pairs of end locking portions 5e provided is formed. Each aluminum foil 5f is provided with a large number of fine through holes. Each of these aluminum foils 5f is attached by fitting the engaging member 5g into the hole of the end locking portion 5e. Of course, after the mounting operation is completed, the side members are fixed to form the case 5a. In this case, the aluminum foil 5f has a three-layer structure. In particular, the aluminum foil 5f should be changed according to specifications not limited to the three-layer structure.
  • the soundproof panel 5 used in the soundproof wall 1 according to the sixth embodiment has a thickness of 30 / zm for all of the aluminum foil 5f.
  • the end locking portion 5e is formed in a shape having a hole having a circular cross section, and the engaging member 5g has a round bar shape.
  • the present invention is not limited to this.
  • the end locking portion 5e is formed into a shape having a square cross section, and
  • the engaging member 5g can be formed into a square bar shape. That is, since an extrusion mold material is used, the above can be easily realized.
  • the soundproof panel 6 used for the soundproof wall according to the seventh embodiment of the present invention is made of aluminum including a rectangular case 6a and a sound absorbing member to be described later housed in the case 6a.
  • the case 6a detachably covers a rectangular frame portion 6b, a back plate 6c attached to one side of the frame portion 6b, and the opening side on the other side of the frame portion 6b, and allows sound waves to pass through.
  • a front plate 6d having a plurality of sound wave passages Pa to be obtained.
  • the sound wave passage Pa is a through hole having a diameter of 0.8 mm.
  • the sound absorbing member includes three aluminum foils 6f provided with an air layer between the back plate 6c, the front plate 6d, and between themselves.
  • the edges of these aluminum foils 6f are provided at the corresponding positions of the upper and lower parts in the case 6a, and are opposite to the surfaces of the three pairs of flat strip-like sticking members 6e protruding in opposite directions. It is attached via a tape.
  • Each aluminum foil 6f has a number of fine through holes. In this case, the force of the aluminum foil 6f having a three-layer structure is to be changed according to the specification, not limited to the three-layer structure, as in the case of the fifth embodiment.
  • the thickness of the aluminum foil 6f is 30 m.
  • edge of the aluminum foil can be attached to the inner wall of the case by means to be described later other than Embodiments 6 and 7.
  • An edge attachment member having a screw hole at the edge is provided on the edge of the aluminum foil, and the edge attachment member is fixed by a screw fitted in a hole provided in the case (mode 9).
  • edge of the aluminum foil is moved to the inner wall side of the case by an edge receiving member protruding from the inner wall of the case and a screw fitted in a hole provided in the case, to the edge receiving member.
  • the received corrugated metal member is fixed by an edge pressing member that presses the edge (form 10).
  • a force aluminum-thin plate using an aluminum foil as a sound absorbing member can be used, an aluminum plate in which fibers are attached to the surface can be used, and the surface can be used. It is also possible to use an aluminum foil in which fibers are stuck to each other.
  • the sound absorbing effect of the soundproof panel can be improved by providing a plurality of partition plates in a direction orthogonal to the longitudinal direction inside the case of the soundproof panel according to the first to twelfth aspects. A soundproofing effect can be obtained.
  • the sound wave that has entered the sound-insulating panel is orthogonal to the sound-absorbing member.
  • the sound absorption effect of the soundproof panel is improved because the sound can be advanced in the direction (opposite direction).
  • the partition plate with a spacing other than a multiple of 1Z2 of the wavelength of the sound to be sound-insulated the direction along the sound-absorbing member of the sound wave that has entered the sound-proof panel Therefore, the sound absorbing effect of the soundproof panel is improved.
  • partition plates at a plurality of different intervals it is possible to prevent the sound absorption performance of sound waves having a specific frequency that have entered the soundproof panel from being deteriorated. Will improve. Therefore
  • the soundproof wall is realized by implementing the soundproof wall. be able to.
  • the one end side force of the case is also installed by inserting a plate-like partition plate.
  • a plate-shaped partition plate is disposed when the sound absorbing member is disposed in the case.
  • the material of the partition plate is not particularly limited to a material which may be a metal (preferably from the viewpoint of recyclability) or a resin.
  • the partition plate may be disposed on the sound absorbing member with an adhesive or the like, or disposed on the constituent member on the end surface of the case and not connected to the sound absorbing member. .
  • 0 is an arithmetic average of ⁇ (0) measured every 15 ° from 0 to 45 °.
  • a metal plate such as a steel plate, a copper plate, a magnesium plate, or a titanium plate is used as the material of the metal member constituting the sound absorbing member. Therefore, it is not limited to aluminum.
  • a metal plate such as a steel plate, a copper plate, a magnesium plate, or a titanium plate is used as the material of the metal member constituting the sound absorbing member. Therefore, it is not limited to aluminum.
  • Embodiments 1 to 12 are only specific examples of the present invention, the scope of the technical idea of the present invention is not limited by these embodiments.
  • the present invention is a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave. And a sound absorbing member housed in the case, and the sound absorbing member has a facing direction between the back plate and the front plate.
  • a cross-sectional shape that is corrugated from the viewpoint is formed into a corrugated shape extending in the specific direction, and each of the metal members is laminated in the facing direction with the tops of the corrugated shapes in contact with each other.
  • Soundproofing pad characterized by Provide a channel.
  • the metal members are laminated so that the tops of the plurality of metal members formed in a corrugated shape are in contact with each other.
  • An air layer can be formed between the two. Therefore, when sound waves enter this soundproof panel, a resonance phenomenon of sound waves occurs in the air layer, and the air in a large number of fine through holes opened in these metal members vibrates violently, resulting in penetration caused by the viscosity of the air.
  • the sound absorbing member is also composed of a metal member, so that it is difficult to recycle such as glass wool having a sound absorbing structure according to the related art that has to be disposed of as shredder dust or the like. Recycling is easier compared to
  • the specific directions of the metal members can be set to directions different from the opposing direction.
  • each metal member is set to be parallel to each side of the rectangular frame portion and to be orthogonal to each other for each adjacent metal member, An air layer can be formed between these metal members by inclining each side of the shape frame and setting the adjacent metal members in different directions. .
  • the present invention provides a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, and an opening side on the other side of the frame portion, and generates sound waves.
  • a case having a front plate provided with a plurality of sound wave passages that can pass through, and a sound absorbing member housed in the case, wherein the sound absorbing member intersects the opposing direction of the back plate and the front plate.
  • a plurality of first metal members and second metal members arranged in such a manner that each of the first metal members has a large number of fine through-holes penetrating in the facing direction.
  • a cross-sectional shape that is corrugated from the viewpoint of a specific direction orthogonal to the direction is formed into a corrugated shape extending in the specific direction, and the second metal member has a large number of fine through-holes penetrating in the facing direction.
  • the surface in the opposite direction is a flat surface.
  • the top portion of the corrugated cross-sectional shape is formed on the flat surface.
  • an air layer can be formed between the corrugated recess and the flat surface of the first and second metal members. Therefore, when a sound wave enters the soundproof panel, a sound wave resonance phenomenon occurs in the air layer, and the air in a large number of fine through holes opened in the first and second metal members vibrates violently.
  • the acoustic wave energy being converted into thermal energy by friction between the inner surface of the through-hole caused by viscosity, It exhibits sound absorption effect in a wide frequency band centered on the air frequency, and exhibits excellent sound absorption performance for noise with a wide frequency component including resonance frequencies.
  • the sound absorbing member since the sound absorbing member has the first and second metal member forces, the glass sound having the conventional sound absorbing structure that has to be disposed of as shredder dust or the like can be used. Recycling is easier compared to difficult-to-recycle materials.
  • the present invention provides a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave. And a sound absorption member housed in the case, the sound absorption member intersecting with the opposing direction of the back plate and the front plate. And a plurality of metal members stacked in the facing direction, and these metal members are corrugated portions having a corrugated cross-sectional shape extending in the specific direction from the viewpoint of the specific direction orthogonal to the facing direction.
  • the corrugated portion and the counterpart flat portion are in contact with each other, and the flat portion and the counterpart wave are in contact with each other.
  • an air layer can be formed between the corrugated concave part and the flat part of each metal member.
  • the sound absorbing member is also composed of a metal member, so that it is difficult to recycle such as glass wool having a sound absorbing structure according to the related art, which has to be disposed of as shredder dust or the like. Recycling is easier compared to
  • the metal member is a plate having a surface with fibers attached thereto. It is preferable.
  • the metal member is preferably a foil having a surface with fibers attached thereto.
  • the present invention is a soundproof panel, which covers a rectangular frame portion, a back plate attached to one side of the frame portion, an opening side on the other side of the frame portion, and a sound wave. And a sound absorption member housed in the case, the sound absorption member intersecting with the opposing direction of the back plate and the front plate. And a metal member having a large number of fine through holes penetrating in the facing direction.
  • the metal member has a flat surface in the facing direction and is opposed to the back plate and the front plate. It is spaced apart in the said opposing direction, It is characterized by the above-mentioned.
  • an air layer is formed between the metal member and the back plate and the front plate, respectively, so that a sound wave resonance phenomenon occurs in the air layer and the metal member is opened by these metal members.
  • the air in a large number of minute through holes vibrates vigorously, and the sound wave energy is converted into thermal energy by friction with the inner surface of the through hole caused by the viscosity of the air. Demonstrates sound absorption performance in the frequency bandwidth, and exhibits excellent sound absorption performance for a wide range of noise components including the resonance frequency.
  • the sound absorbing member is also composed of a metal member, it is difficult to recycle the conventional sound absorbing structure such as glass wool, which has to be disposed of as shredder dust or the like. Recycling is easier compared to
  • the metal member is preferably a multiple foil in which a plurality of foils or foils having pores are stacked.
  • the planar metal member is a foil or a multiple foil in which a plurality of foils having a porous structure are stacked
  • the same configuration as that of Patent Document 1 is adopted, so that the sonic energy due to friction is further increased. Can also be obtained. Therefore, the same as in the case of the soundproof structure according to Patent Documents 1 and 2.
  • the sound absorbing performance can be exhibited in a wider frequency band than the sound absorbing structure that uses only the resonance phenomenon to dissipate sonic energy.
  • the metal member is preferably a plate having fibers attached to its surface.
  • the metal member is preferably a foil having a surface with fibers attached thereto.
  • the sound absorbing members are arranged at intervals smaller than 1Z2 of the wavelength of the sound to be soundproofed in a direction orthogonal to the facing direction, and a plurality of partition plates extending in the facing direction I prefer to be equipped with.
  • the partition plates are provided at intervals smaller than 1Z2 of the wavelength of the sound to be soundproofed in the direction orthogonal to the facing direction. Therefore, the sound wave that has entered the soundproof panel travels in a direction perpendicular to the sound absorbing member, so that the sound absorbing effect of the soundproof panel is improved.
  • the sound absorbing members are arranged at intervals other than a multiple of 1Z2 of the wavelength of the sound to be soundproofed in a direction orthogonal to the facing direction, and a plurality of members extending in the facing direction. It is preferable to have a partition plate.
  • the partition plates are provided at intervals other than a multiple of 1Z2 of the wavelength of the sound to be soundproofed in the direction orthogonal to the facing direction. Therefore, the sound wave that has entered the soundproof panel travels in a direction perpendicular to the sound absorbing member that does not travel in the direction along the sound absorbing member, so that the sound absorbing effect of the soundproof panel is improved.
  • the sound absorbing member may be provided at a plurality of different intervals in a direction orthogonal to the facing direction and provided with a plurality of partition plates extending in the facing direction. I like it.
  • the soundproofing panel differs in a direction orthogonal to the facing direction. Partition plates are provided at a plurality of intervals. Accordingly, since the sound absorption performance of the sound wave having a specific frequency that has entered the soundproof panel is prevented from being lowered, the sound absorption effect of the soundproof panel with respect to the sound of a plurality of frequencies is improved.
  • an air layer is formed between the corrugations of the metal members or between the corrugations of the metal members and the planar metal member. Therefore, a resonance phenomenon of sound waves occurs in the air layer, and these Air in a large number of minute through-holes opened in a metal member vibrates vigorously, and sonic energy is converted into thermal energy by friction with the inner surface of the through-hole caused by the viscosity of the air. Exhibits sound absorption effect in a wide frequency range centered, and exhibits excellent sound absorption performance for noise of wide frequency components including resonance frequencies.
  • an air layer is formed between the metal member and the back plate and the front plate, respectively, and therefore, a sound wave resonance phenomenon occurs in the air layer and is opened by these metal members.
  • air in a large number of fine through-holes vibrates vigorously, and sonic energy is converted into thermal energy by friction with the inner surface of the through-hole caused by the viscosity of the air. It exhibits sound absorption performance in a range of frequency bandwidths, and exhibits excellent sound absorption performance for noise with a wide frequency range including resonance frequencies.
  • the sound absorbing member is also composed of a metal member, it is difficult to recycle the conventional sound absorbing structure such as glass wool, which has to be disposed of as shredder dust or the like. Recycling is easier compared to

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Abstract

Panneau insonorisant capable de présenter d’excellentes performances d’absorption du son sur une large bande de fréquence et facilitant le recyclage d’un matériau d'insonorisation. Le panneau insonorisant (2) s’obtient en logeant le matériau insonorisant dans un boîtier (2a), et le boîtier (2a) présente une section d’encadrement rectangulaire, une plaque arrière (2c) fixée à un côté de la section d'encadrement, et une plaque frontale amovible (2d) permettant de recouvrir l'ouverture de l'autre côté de la section d'encadrement et présentant des passages d'onde sonore permettant le passage d’une onde sonore. Le matériau insonorisant s’obtient en superposant de manière alternée de minces feuilles d’aluminium ondulées longitudinalement (2e) et de minces feuilles d’aluminium ondulées latéralement (2f) les unes au-dessus des autres. Les minces feuilles d’aluminium ondulées longitudinalement (2e) présentent des ondulations orientées pour s’étendre dans une direction du boîtier (2a) et possèdent un grand nombre de trous traversants. Les minces feuilles d’aluminium ondulées latéralement (2f) présentent des ondulations orientées pour s’étendre dans l'autre direction perpendiculaire à la direction des ondulations formées dans les minces feuilles d'aluminium ondulées longitudinalement (2e) et possèdent également un grand nombre de fins trous traversants.
PCT/JP2006/319974 2005-10-05 2006-10-05 Panneau insonorisant WO2007040265A1 (fr)

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JP2005-292773 2005-10-05
JP2005292773A JP2007101959A (ja) 2005-10-05 2005-10-05 防音パネルおよび防音壁

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WO2007040265A1 true WO2007040265A1 (fr) 2007-04-12

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CN101278336A (zh) 2008-10-01

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