EP1069243A2 - Panneau acoustique pour barriere antibruit - Google Patents

Panneau acoustique pour barriere antibruit Download PDF

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Publication number
EP1069243A2
EP1069243A2 EP00115350A EP00115350A EP1069243A2 EP 1069243 A2 EP1069243 A2 EP 1069243A2 EP 00115350 A EP00115350 A EP 00115350A EP 00115350 A EP00115350 A EP 00115350A EP 1069243 A2 EP1069243 A2 EP 1069243A2
Authority
EP
European Patent Office
Prior art keywords
sheet
soundproofing panel
soundproofing
panel
sound
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Withdrawn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
EP00115350A
Other languages
German (de)
English (en)
Other versions
EP1069243A3 (fr
Inventor
Luigi Cicinnati
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.)
Metalmeccanica Fracasso SpA
Original Assignee
Metalmeccanica Fracasso SpA
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
Priority claimed from IT99BO000394 external-priority patent/IT1309335B1/it
Priority claimed from IT99BO000467 external-priority patent/IT1310457B1/it
Priority claimed from IT1999BO000557 external-priority patent/IT1311098B1/it
Application filed by Metalmeccanica Fracasso SpA filed Critical Metalmeccanica Fracasso SpA
Publication of EP1069243A2 publication Critical patent/EP1069243A2/fr
Publication of EP1069243A3 publication Critical patent/EP1069243A3/fr
Withdrawn legal-status Critical Current

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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
    • E01F8/0052—Grate-style, e.g. as wall facing
    • E01F8/0058—Grate-style, e.g. as wall facing with damping material, e.g. rockwool, sand

Definitions

  • the present invention relates to a soundproofing panel for acoustic barriers.
  • the present invention relates to a panel for acoustic barriers used to prevent the propagation of pollutant sound waves in open spaces, to which application the following description refers purely by way of example.
  • acoustic barriers comprising a number of sound-absorbing and/or soundproofing panels placed adjacent to one another on supporting frames to form a substantially vertical wall surrounding, normally seamlessly, the pollutant sound source.
  • Currently used sound-absorbing and/or soundproofing panels are rectangular, and are defined by a parallelepiped-shaped outer box shell normally made of zinc plated, painted sheet metal and filled with glass wool or similar.
  • the outer box shell is formed by fitting together two half-shells, and mainly provides for soundproofing, while the filler material mainly provides for sound absorption.
  • the main drawback of currently used sound-absorbing and/or soundproofing panels is their inability to adapt, or rather be “tuned”, to the characteristics, i.e. the frequency spectrum, of the incident sound wave, so as to maximize shielding capacity.
  • the characteristics of the pollutant sound wave in fact, vary according to the pollutant sound source (moving vehicles and trains, machinery, etc.), whereas the curve representing attenuation of the incident sound wave as a function of the frequency of the sound-absorbing and/or soundproofing panel is of a given fixed shape (continuous line in Figure 3).
  • a panel for acoustic barriers characterized by being defined exclusively by a sheet having, on one of the two lateral surfaces, a number of longitudinal sound-breaking fins parallel to and facing one another, and each for breaking the front of the incident sound wave.
  • Number 1 in Figures 1 and 2 indicates as a whole a soundproofing panel particularly suitable for forming acoustic barriers for preventing the propagation of pollutant sound waves in preferably, though not necessarily, open spaces.
  • Soundproofing panel 1 is defined by a sheet 2 having, on one of the two lateral surfaces, a number of longitudinal sound-breaking fins 3 parallel to and facing one another, and each for breaking the front F of the incident sound wave.
  • sheet 2 is made of metal, such as steel or aluminium, possibly painted and/or zinc plated to withstand atmospheric agents, but may obviously also be made of plastic material or similar.
  • Longitudinal sound-breaking fins 3 are T-shaped in section and equally spaced over the whole of lateral surface 2a of sheet 2 to define a number of open gaps 4 for preventing propagation of the incident sound wave, in the same way as currently marketed double glazing. Being located side by side and full of air, in fact, gaps 4 define a layer of air, which simultaneously provides for soundproofing and sound absorption, in the same way as the layer of air trapped between the two panes of glass of a double-glazed window. Gaps 4 also act as sound boxes by more effectively attenuating a given sound frequency spectrum depending on the geometric dimensions of gaps 4.
  • sheet 2 has a fretted profile, so that longitudinal sound-breaking fins 3 are defined by the stiffening ribs of sheet 2, and sheet 2 may thus be obtained directly by subjecting a flat rolled section to a succession of rolling, die-forming operations or similar production process.
  • sheet 2 preferably, though not necessarily, comprises a number of stiffening drawings 5, which are X-shaped in the example shown, are equally spaced along the back of gaps 4, and provide for increasing the structural rigidity of sheet 2 and the soundproofing capacity of panel 1 by raising the natural resonance frequency of sheet 2.
  • drawings 5 may vary to adjust the natural resonance frequency of sheet 2 as required.
  • soundproofing panel 1 also comprises a number of inserts 9 made of soundproofing and/or sound-absorbing material, and each housed inside a respective gap 4 on the panel. Inserts 9 extend the full length of respective gaps 4, may vary in thickness according to their position on soundproofing panel 1, and are all preferably, though not necessarily, made of the same soundproofing and/or sound-absorbing material.
  • each insert 9 is retained inside respective gap 4 by a retaining grille 10 inserted inside gap 4, directly over insert 9.
  • Each grille on soundproofing panel 1 is obviously fitted between the two longitudinal sound-breaking fins 3 defining respective gap 4, to prevent insert 9 from falling out when soundproofing panel 2 is set up.
  • sheet 2 of soundproofing panel 1 also comprises a number of preferably, though not necessarily, semispherical auxiliary drawings 11 appropriately distributed along the back of gaps 4.
  • the concavity of each drawing 11 may selectively face inwards or outwards of soundproofing panel 1, i.e. inwards or outwards of respective gap 4, so as to vary the total volume of each gap 4 of soundproofing panel 1 as required.
  • the number, depth, shape and arrangement of auxiliary drawings 11 may obviously vary inside each gap 4.
  • each gap 4 acts as a sound box for more effectively attenuating a given sound frequency spectrum, depending on the geometric dimensions, i.e. volume, of gap 4.
  • FIG. 3 shows, as a function of frequency, the attenuation curve A 0 (f) of a conventional panel (continuous line), and the attenuation curves A 1 (f), A 2 (f), A 3 (f) of three different geometric configurations of soundproofing panel 1 (dash lines).
  • Attenuation curve A(f) may obviously also be adjusted using different soundproofing and/or sound-absorbing materials for inserts 9.
  • soundproofing panel 1 it is now possible to produce acoustic barriers specially designed to attenuate the sound waves generated by specific pollutant sound sources. This may obviously also be achieved using adjacent soundproofing panels 1 with appropriately differing attenuation curves.
  • a further advantage of soundproofing panel 1 as described and illustrated above lies in it being much cheaper to produce than currently used panels, by having no sound-absorbing filler material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP00115350A 1999-07-14 2000-07-14 Panneau acoustique pour barriere antibruit Withdrawn EP1069243A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
IT99BO000394 IT1309335B1 (it) 1999-07-14 1999-07-14 Pannello fonoisolante per barriere acustiche.
ITBO990394 1999-07-14
ITBO990467 1999-09-01
IT99BO000467 IT1310457B1 (it) 1999-09-01 1999-09-01 Pannello fonoisolante per barriere acustiche.
IT1999BO000557 IT1311098B1 (it) 1999-10-15 1999-10-15 Pannello fonoisolante per barriere acustiche.
ITBO990557 1999-10-15

Publications (2)

Publication Number Publication Date
EP1069243A2 true EP1069243A2 (fr) 2001-01-17
EP1069243A3 EP1069243A3 (fr) 2001-06-06

Family

ID=27273906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00115350A Withdrawn EP1069243A3 (fr) 1999-07-14 2000-07-14 Panneau acoustique pour barriere antibruit

Country Status (6)

Country Link
EP (1) EP1069243A3 (fr)
AR (1) AR029380A1 (fr)
CA (1) CA2314165A1 (fr)
IL (1) IL137249A0 (fr)
MX (1) MXPA00006895A (fr)
TR (1) TR200002066A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100507755B1 (ko) * 2003-04-25 2005-08-10 이근식 트랩형 방음판
CN109192190A (zh) * 2018-09-19 2019-01-11 中国人民解放军国防科技大学 一种薄层超材料吸声结构
CN111749151A (zh) * 2019-03-29 2020-10-09 比亚迪股份有限公司 隔音板、声屏障和轨道系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244439A (en) * 1977-11-10 1981-01-13 Elektronikcentralen Sound-absorbing structure
CH641228A5 (en) * 1979-09-11 1984-02-15 Gysi Gebr Ag Sound-absorbing element which can be mounted on a load-bearing structure
EP0786759A1 (fr) * 1994-10-11 1997-07-30 Nitto Boseki Co., Ltd. Corps, panneau et unite pour absorption phonique
EP0843045A1 (fr) * 1996-11-19 1998-05-20 METALMECCANICA FRACASSO S.p.A. Panneau d'isolation acoustique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244439A (en) * 1977-11-10 1981-01-13 Elektronikcentralen Sound-absorbing structure
CH641228A5 (en) * 1979-09-11 1984-02-15 Gysi Gebr Ag Sound-absorbing element which can be mounted on a load-bearing structure
EP0786759A1 (fr) * 1994-10-11 1997-07-30 Nitto Boseki Co., Ltd. Corps, panneau et unite pour absorption phonique
EP0843045A1 (fr) * 1996-11-19 1998-05-20 METALMECCANICA FRACASSO S.p.A. Panneau d'isolation acoustique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100507755B1 (ko) * 2003-04-25 2005-08-10 이근식 트랩형 방음판
CN109192190A (zh) * 2018-09-19 2019-01-11 中国人民解放军国防科技大学 一种薄层超材料吸声结构
CN109192190B (zh) * 2018-09-19 2020-05-08 中国人民解放军国防科技大学 一种薄层超材料吸声结构
CN111749151A (zh) * 2019-03-29 2020-10-09 比亚迪股份有限公司 隔音板、声屏障和轨道系统
CN111749151B (zh) * 2019-03-29 2022-01-07 比亚迪股份有限公司 隔音板、声屏障和轨道系统

Also Published As

Publication number Publication date
TR200002066A3 (tr) 2001-02-21
MXPA00006895A (es) 2004-10-28
IL137249A0 (en) 2001-07-24
CA2314165A1 (fr) 2001-01-14
AR029380A1 (es) 2003-06-25
EP1069243A3 (fr) 2001-06-06
TR200002066A2 (tr) 2001-02-21

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