GB2486714A - Acoustic louvre having sound energy absorption element encased by a watertight element - Google Patents

Acoustic louvre having sound energy absorption element encased by a watertight element Download PDF

Info

Publication number
GB2486714A
GB2486714A GB1021888.1A GB201021888A GB2486714A GB 2486714 A GB2486714 A GB 2486714A GB 201021888 A GB201021888 A GB 201021888A GB 2486714 A GB2486714 A GB 2486714A
Authority
GB
United Kingdom
Prior art keywords
louvre
sound
energy absorption
watertight
exterior acoustic
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB1021888.1A
Other versions
GB201021888D0 (en
Inventor
Peter Braybrook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Levolux AT Ltd
Original Assignee
Levolux AT Ltd
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 Levolux AT Ltd filed Critical Levolux AT Ltd
Priority to GB1021888.1A priority Critical patent/GB2486714A/en
Publication of GB201021888D0 publication Critical patent/GB201021888D0/en
Priority to EP11193884A priority patent/EP2469004A3/en
Priority to US13/329,283 priority patent/US20120160603A1/en
Publication of GB2486714A publication Critical patent/GB2486714A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/38—Other details
    • E06B9/386—Details of lamellae
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08—Louvre doors, windows or grilles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Ventilation (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The acoustic louvre 10 comprises a body 12 defining major upper 22 and lower 24 surfaces and minor side surfaces 20, the body including a support element 38, sound energy absorption element 40, and a flexible watertight element 50, wherein the absorption element is supported by the support element and encased by the watertight element, and the watertight-encased absorption element is accessible from the upper and lower surfaces of the body. The watertight element may comprise a single or double skinned membrane 52 formed from rubber, silicon or plastics vacuum or pressure formed onto the absorption element. The absorption element may be split into two parts 42,44, separated by a baffle 46. The support element may include perforated plates 16,18 and end caps that are engageable with the perforated plates. The louvre may be used to dampen sounds emanating from exterior fan units.

Description

Exterior Acoustic Louvre The present invention relates to an exterior acoustic louvre, for example, for deadening or damping sound emanating from exterior fan units.
Exterior acoustic louvres are known and as mentioned above commonly used to deaden or damp noise being generated by exteriorly placed electromechanical units, such as fans, whilst also providing adequate ventilation and shielding against ambient environmental conditions, such as sun and rain.
However, to date known exterior acoustic louvres including internal sound-insulating material are only open on a lower surface to absorb incident sound energy. The upper surface is fully closed by the louvre body to prevent or limit the ingress of rain and other precipitation.
This is problematic, since in use any sound energy which is reflected from the lower surface of the louvre is immediately reflected by the solid upper surface of the neighbouring louvre below.
The present invention seeks to provide a solution to this problem.
According to the present invention, there is provided an exterior acoustic louvre comprising a louvre body defining major upper and lower surfaces and minor side surfaces, the louvre body including a support element, a sound-energy absorption element supported by the support element, and a flexible plastics watertight element for watertightly encasing the sound-energy absorption element, whereby the watertightly encased sound-energy absorption element is accessible in the directions of both the upper and lower major surfaces of the louvre body.
Preferable and/or optional features of the invention are set forth in claims 2 to 14, inclusive.
The invention will now be more particularly described, by way of example only, with reference to the accompanying drawing, in which: Figure 1 shows a diagrammatic lateral cross-sectional view of one embodiment of an exterior acoustic louvre, in accordance with the present invention.
Referring to the drawing, there is shown one embodiment of an exterior acoustic louvre which comprises a louvre body 12 connectable to an exterior support system (not shown). Preferably, the exterior support system includes a plurality of brackets for engaging a plurality of the said acoustic louvres 10 in spaced apart relationship.
Furthermore, the brackets may locate a lateral extent of the or each said acoustic louvre at an angle to a horizontal plane or a vertical plane.
The louvre body 12 includes opposing longitudinal capping elements 14, lateral end caps (not shown) for interengaging the capping elements 14, and upper and lower cover elements 16, 18 which extend between the longitudinal capping elements 14 and the lateral end caps. The capping elements 14 and the end caps define minor side surfaces of the louvre body 12, whereas the cover elements 16, 18 define at least a major portion of the upper and lower major surfaces 22, 24 of the louvre body 12.
The capping elements 14 are preferably metal or plastics extrusions, and may for example be aerodynamically profiled to reduce wind resistance when in use. Each capping element 14 includes a slot 26 along its upper and lower rear-facing longitudinal edges 28 for receiving a longitudinal edge 30 of the respective cover element 16, 18.
The end caps may also be metal or plastics, and are preferably fastened via screw-threaded fasteners to screw-ports 32 of the capping elements 14. Additional or alternative fastening means can also be considered, such as welding and bonding.
The cover elements 16, 18 are also preferably metal or plastics planar plates 34. In this case, each plate 34 is perforated with a multiplicity of small spaced-apart apertures 36.
However, fewer and larger apertures may be considered. It is even possible that only a single large aperture may be utilised whereby the cover element 16, 18 forms a perimeter border interconnecting the capping elements 14 and the end caps.
The longitudinal capping elements 14, the lateral end caps, and the upper and lower cover elements 16, 18 form a support element 38 in which is housable a sound-energy absorption element 40. The sound-energy absorption element 40 is preferably an insulator, such as rockwool or open-cell polyurethane foam, for example. An advantage of utilising substantially rigid polyurethane foam board as the insulator will be described hereinafter.
In this embodiment, the sound-energy absorption element 40 includes upper and lower sound-energy absorption parts 42, 44 interposed between which is a baffle element 46.
The baffle element 46 is a preferably solid sheet of metal, such as aluminium, or plastics and to which the upper and lower sound-energy absorption parts 42, 44 are mounted or abut.
The sound-energy absorption element 40 extends substantially fully between the capping elements 14 and the end caps, and substantially fully between the upper and lower cover elements 16, 18.
The baffle element 46, similarly, extends substantially fully between the capping elements 14 and the end caps, and may extend slightly beyond the outer side faces 48 of the upper and lower sound-energy absorption parts 42, 44.
To protect or shield the sound-energy absorption element 40 from the elements, the louvre body 12 includes a, preferably soft and/or tactile, flexible plastics watertight element 50 which fully encases the sound-energy absorption element 40 and the baffle element 46. The watertight element 50 is preferably a lightweight membrane 52, for example, formed from rubber, silicon or plastics, which extends along the minor side surfaces 48 and the upper and lower major surfaces 54, 56 of the sound-energy absorption element 40.
Optionally, instead of utilising a single membrane 52 to cover both upper and lower sound-energy absorption parts 42, 44, each sound-energy absorption part 42, 44 may be separately encased, and then mounted on the baffle element 46.
Furthermore, the watertight membrane or element 50 may be double skinned for improved durability.
The watertight membrane 52 may be a bag, and/or may be a vacuum formed or pressure formed layer or film. Preferably, the sound-energy absorption element 40 may be coated with a base layer of adhesive prior to the membrane being applied. This would provide greater puncture resistance.
In any event, the watertight element 50 is sufficiently thin to allow substantially unobstructed passage of sound energy into the sound-energy absorption element 40, whilst being sufficiently robust or resilient to protect against being punctured, for example, from flying debris or detritus. Preferably, the watertight element 50 is drawn tightly across the sound-energy absorption parts 42, 44, so that at least the outer surfaces 58 are smooth and at least substantially uncreased or unwrinkled.
Beneficially, the watertight element 50 is coloured to match or substantially match at least the outer surface 60 of the adjacent cover element 16, 18. This is particularly important from an aesthetic perspective, since architects and designers are not inclined to specify parts or features which detract from the overall appearance of a building or installation. By colour matching the watertight element 50 to the cover element 16, 18, the watertight element 50 becomes barely noticeable through the apertures 36 of the upper and lower cover elements 16, 18, especially at distance.
In use, the exterior acoustic louvre 10 can thus be utilised to absorb incident sound energy directed onto both the upper and lower major surfaces 22, 24 of the louvre body 12. The baffle element 46 prevents or limits the passage of unabsorbed sound energy through and back out of the louvre body 12, and by having open upper and lower major surfaces 22, 24, any reflected sound energy is typically directed to an adjacent major surface 22, 24 of a neighbouring like exterior acoustic louvre 10, whereby it is absorbed or dissipated.
The watertight element 50 prevents the ingress of moisture, precipitation and other particulate matter into the sound-energy absorption element 40, thereby maintaining its integrity and functionality.
The apertured upper and lower cover elements 16, 18 aid in protecting the watertight element 50 and the sound-energy absorption element 40 from environmental conditions, and disguise the watertight element 50 especially when formed with the same or similar colour.
In a modification to the embodiment described above, the watertight element 50 may be non-uniformly planar, for example, by including a rippling or sinusoidal wavy outer surface. This may be beneficial in dispersing or dissipating reflected sound energy. In this case, any reflected sound energy may be incident on an underside surface 62 of the adjacent cover element 16, 18, and thus be reflected again back to the watertight element 50 and into the sound-energy absorption element 40.
In a further modification, the cover elements 16, 18 may be dispensed with, whereby the upper and lower surfaces 64, 66 of the watertight element 50 thus at least in part define the upper and lower major surfaces 22, 24 of the louvre body 12. In this case, the longitudinal capping elements 14 hold the watertight element 50 and the sound-energy absorption element 40, creating a rigid or substantially rigid louvre body 12. The watertight element 50 would need to be suitably resilient to withstand environmental conditions without being punctured or perforated.
To promote better drainage either with or without the cover elements 16, 18, the watertight element 50 and/or the sound-energy absorption element 40 may have at least one major surface, typically being the upper major surface 64, which is sloped or ramped to promote runoff The sloping or ramped surface may be planar, multifaceted, curved or domed, by way of example. Other non-uniform cross-sectional profiles along one or more dimensional axes can also be considered to improve the aerodynamics of the louvre body 12, drainage, airflow and pressure drops thereacross.
Although preferably planar, the cover elements 16, 18 may also be non-planar in at least one dimension or direction as necessity dictates.
It may also be feasible that the watertightly encased sound-energy absorption element defines, fully or at least in part, the minor and major outer surfaces of the louvre body 12. This would be particularly achievable by utilising the aforementioned polyurethane foam board. This may enable the longitudinal capping elements 14 and/or the lateral end caps to be dispensed with. In this case, the baffle element 46 may be utilised to provide a hidden or discrete bracket for supporting the exterior acoustic louvre 10 and for connection to the supports of the exterior louvre system.
It is thus possible to provide an exterior acoustic louvre whereby the watertightly encased sound-energy absorption element is accessible by incident sound energy in the directions of both the upper and lower major surfaces of the louvre body.
The embodiments described above are provided by way of examples only, and various other modifications will be apparent to persons skilled in the field without departing from the scope of the invention as defined by the appended claims.

Claims (15)

  1. Claims 1. An exterior acoustic louvre comprising a louvre body defining major upper and lower surfaces and minor side surfaces, the louvre body including a support element, a sound-energy absorption element supported by the support element, and a flexible plastics watertight element for watertightly encasing the sound-energy absorption element, whereby the watertightly encased sound-energy absorption element is accessible in the directions of both the upper and lower major surfaces of the louvre body.
  2. 2. An exterior acoustic louvre as claimed in claim 1, wherein the flexible plastics watertight element is coloured coordinated to match or substantially match a colour of the support element.
  3. 3. An exterior acoustic louvre as claimed in claim 1 or claim 2, wherein the flexible plastics watertight element is a membrane.
  4. 4. An exterior acoustic louvre as claimed in any one of claims 1 to 3, wherein the flexible plastics watertight element is vacuum formed around the sound-energy absorption element.
  5. 5. An exterior acoustic louvre as claimed in any one of claims I to 4, wherein the flexible plastics watertight element has non-smoothly planar upper and lower major surfaces, so as to disperse reflected incident sound-energy.
  6. 6. An exterior acoustic louvre as claimed in any one of claims 1 to 5, wherein the sound-energy absorption element has a non-uniform cross-section in at least one direction.
  7. 7. An exterior acoustic louvre as claimed in claim 6, wherein the sound-energy absorption element is at least in part ramped.
  8. 8. An exterior acoustic louvre as claimed in any one of claims 1 to 7, further comprising a baffle element interposed between two parts of the sound-energy absorption element.
  9. 9. An exterior acoustic louvre as claimed in claim 8, wherein the baffle element forms at least part of the support element.
  10. 10. An exterior acoustic louvre as claimed in any one of claims 1 to 9, wherein the support element of the louvre body includes cover elements which define at least in part the major upper and lower surfaces, each cover element including at least one opening providing access to the sound-energy absorption element.
  11. 11. An exterior acoustic louvre as claimed in claim 10, wherein each cover element is a plate.
  12. 12. An exterior acoustic louvre as claimed in claim 10 or claim 11, wherein each cover element has a plurality of apertures therethrough.
  13. 13. An exterior acoustic louvre as claimed in any one of claims 10 to 12, wherein each cover element is perforated.
  14. 14. An exterior acoustic louvre as claimed in any one of claims 10 to 13, wherein the support element includes longitudinal end caps, the cover elements being engagable with the longitudinal end caps.
  15. 15. An exterior acoustic louvre substantially as hereinbefore described with reference to the accompanying drawing.
GB1021888.1A 2010-12-23 2010-12-23 Acoustic louvre having sound energy absorption element encased by a watertight element Withdrawn GB2486714A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1021888.1A GB2486714A (en) 2010-12-23 2010-12-23 Acoustic louvre having sound energy absorption element encased by a watertight element
EP11193884A EP2469004A3 (en) 2010-12-23 2011-12-15 Exterior acoustic louvre
US13/329,283 US20120160603A1 (en) 2010-12-23 2011-12-18 Exterior Acoustic Louvre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1021888.1A GB2486714A (en) 2010-12-23 2010-12-23 Acoustic louvre having sound energy absorption element encased by a watertight element

Publications (2)

Publication Number Publication Date
GB201021888D0 GB201021888D0 (en) 2011-02-02
GB2486714A true GB2486714A (en) 2012-06-27

Family

ID=43598925

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1021888.1A Withdrawn GB2486714A (en) 2010-12-23 2010-12-23 Acoustic louvre having sound energy absorption element encased by a watertight element

Country Status (3)

Country Link
US (1) US20120160603A1 (en)
EP (1) EP2469004A3 (en)
GB (1) GB2486714A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9518757B2 (en) * 2012-12-18 2016-12-13 David James Boyce Air return grille assembly
GB2528950A (en) * 2014-08-06 2016-02-10 Aaf Ltd Sound suppression apparatus
CA2957902C (en) * 2016-02-24 2019-05-07 VAW Systems Ltd. Duct mounted sound attenuating baffle with an internally suspended mass layer
CN108119033B (en) * 2018-01-05 2019-09-20 湖南固尔邦幕墙装饰股份有限公司 Heat-insulating sound-insulating aluminium door plate
CN108518171A (en) * 2018-04-20 2018-09-11 佛山汇众森泰科技有限公司 A kind of noise abatement purification intelligent domestic door
US11592205B2 (en) * 2018-12-18 2023-02-28 Johnson Controls Tyco IP Holdings LLP Silencer assembly for air handling unit of an HVAC system
CN110242183B (en) * 2019-06-27 2020-12-18 铜陵市鼎辉新材料科技有限公司 Composite wooden door

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756568A1 (en) * 1977-12-19 1979-06-21 Wrede & Niedecken Gmbh Ventilation system adjustable air inlet - has tilting slats with core enclosed in layer giving weather protection and sound deadening
GB1556823A (en) * 1975-07-30 1979-11-28 Industrial Acoustics Co Silencer
WO1999013274A1 (en) * 1997-09-11 1999-03-18 Hrl Technology Pty. Ltd. An improved sound attenuating device
JPH11182152A (en) * 1997-12-20 1999-07-06 Sanki Louver Kk Vertical soundproof/waterproof louver
JPH11247546A (en) * 1997-12-09 1999-09-14 Chubu Electric Power Co Inc Vertical type soundproof waterproof louver
DE10104923C1 (en) * 2001-01-25 2002-10-02 Lta Lufttechnische Komponenten Fireproof flap for ventilation systems such as ventilation ducts in buildings, has flap leaf which consists of perforated plate on both sides and filled with insulating material
JP2004084991A (en) * 2002-08-23 2004-03-18 Asahi Glass Buil-Wall Co Ltd Louver-like structure
GB2442141A (en) * 2006-09-23 2008-03-26 Gilberts Thermally insulating, multi-bladed damper device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2270825A (en) * 1939-12-12 1942-01-20 Johns Manville Sound-absorbing structure
DE2019416B2 (en) * 1970-04-22 1972-04-20 Isoliertechnik Horst Grassmann, 6000 Frankfurt SILENCER FOR STREAMING GASES
US3656576A (en) * 1970-11-19 1972-04-18 Gunter Gubela Noise shield panels and method of fabrication
US3983956A (en) * 1974-11-04 1976-10-05 Manhart J Kenneth Noise reduction barrier
DE3219339C1 (en) * 1982-05-22 1983-02-03 Metzeler Schaum Gmbh, 8940 Memmingen Flat element for airborne sound absorption
JP2866860B2 (en) * 1993-06-07 1999-03-08 ゼオン化成株式会社 Soundproofing material
DE4413009A1 (en) * 1994-04-15 1995-10-19 Naeher Georg Gmbh Sound absorbers for motor vehicles
US5696361A (en) * 1995-11-13 1997-12-09 Chen; Chia-Hsien Multi-ducts sound eliminator for air pipe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1556823A (en) * 1975-07-30 1979-11-28 Industrial Acoustics Co Silencer
DE2756568A1 (en) * 1977-12-19 1979-06-21 Wrede & Niedecken Gmbh Ventilation system adjustable air inlet - has tilting slats with core enclosed in layer giving weather protection and sound deadening
WO1999013274A1 (en) * 1997-09-11 1999-03-18 Hrl Technology Pty. Ltd. An improved sound attenuating device
JPH11247546A (en) * 1997-12-09 1999-09-14 Chubu Electric Power Co Inc Vertical type soundproof waterproof louver
JPH11182152A (en) * 1997-12-20 1999-07-06 Sanki Louver Kk Vertical soundproof/waterproof louver
DE10104923C1 (en) * 2001-01-25 2002-10-02 Lta Lufttechnische Komponenten Fireproof flap for ventilation systems such as ventilation ducts in buildings, has flap leaf which consists of perforated plate on both sides and filled with insulating material
JP2004084991A (en) * 2002-08-23 2004-03-18 Asahi Glass Buil-Wall Co Ltd Louver-like structure
GB2442141A (en) * 2006-09-23 2008-03-26 Gilberts Thermally insulating, multi-bladed damper device

Also Published As

Publication number Publication date
EP2469004A2 (en) 2012-06-27
GB201021888D0 (en) 2011-02-02
US20120160603A1 (en) 2012-06-28
EP2469004A3 (en) 2012-12-05

Similar Documents

Publication Publication Date Title
US20120160603A1 (en) Exterior Acoustic Louvre
US9534385B2 (en) Room delimitation element
GB2387395A (en) An inflatable panel
WO2013169788A2 (en) Acoustic damping device and installation
JP4918514B2 (en) Sound barrier
JP2002317408A (en) Translucent sound insulation board and sound insulation wall
KR101435007B1 (en) Noise reduction Louver
JP2006299698A (en) Soundproof panel and soundproof wall
KR101916003B1 (en) Fixing equipments for soundproof panel of noise barrier tunnel
JP3121094U (en) Silencer hood for air conditioner outdoor unit installation
JP3625392B2 (en) Translucent soundproof board and soundproof wall using the same
JP3529303B2 (en) Sound barrier
JP2002146727A (en) Translucent soundproof plate and sound insulating wall
JP3543909B2 (en) Interior panel for tunnel and method of mounting the same
JP3992656B2 (en) Sound absorption and translucent soundproof wall
JP2011052415A (en) Parting material and detailing structure thereof
JP3151924U (en) Soundproof louver
CN218971058U (en) Shutter device
JP3833036B2 (en) Thin soundproof panel
JP3844331B2 (en) Translucent soundproof board and soundproof wall using the same
JP2015034391A (en) Ventilation component for shed roof
JP4531493B2 (en) Soundproofing
JP3141032U (en) Duct integrated ventilation louver
JP3289233B2 (en) Translucent sound absorbing panel
KR20180067035A (en) A soundproof wall with a function of diffused reflection

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)