EP4350686A1 - Module de connexion pour un dispositif de protection contre le bruit - Google Patents

Module de connexion pour un dispositif de protection contre le bruit Download PDF

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Publication number
EP4350686A1
EP4350686A1 EP23199711.5A EP23199711A EP4350686A1 EP 4350686 A1 EP4350686 A1 EP 4350686A1 EP 23199711 A EP23199711 A EP 23199711A EP 4350686 A1 EP4350686 A1 EP 4350686A1
Authority
EP
European Patent Office
Prior art keywords
suspended mass
connection
mass element
base element
connection module
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.)
Pending
Application number
EP23199711.5A
Other languages
German (de)
English (en)
Inventor
Alberto Corigliano
Chiara Gazzola
Francesco Braghin
Luca D'ALESSANDRO
Giovanni CAPELLARI
Stefano CAVERNI
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.)
Pantecnica SpA
Original Assignee
Pantecnica 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
Application filed by Pantecnica SpA filed Critical Pantecnica SpA
Publication of EP4350686A1 publication Critical patent/EP4350686A1/fr
Pending legal-status Critical Current

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    • 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

Definitions

  • the present invention is developed in the field of acoustic noise shielding.
  • acoustic insulation is made with panels formed by a single layer or multiple layers.
  • the efficacy of the acoustic insulation of the panel is expressed by means of the sound-insulating power (transmission loss), i.e. a ratio in decibels of the sound pressure that is transferred to the downstream environment to the sound pressure incident on the panel in the upstream environment.
  • the sound-insulating power varies based on the frequency of the sound and the physical properties of the panel, in particular its density and its stiffness or elasticity.
  • stiffer layers and more elastic layers are usually alternated.
  • Such a panel can be physically modelled as a system with a series of masses and springs, which reduce the propagation of the sound between the two sides of the panel.
  • Acoustic shielding panels based on the metamaterial technology are also known in the art. Unlike traditional panels, where the stiffness and mass properties are determined by the elasticity and density of the microscopic structure of the chosen materials, as well as by their thickness, in metamaterials multiple macroscopic components are connected to each other in such a way as to confer the desired properties of mass and stiffness.
  • metamaterials allow to achieve high performance with lower weights and thicknesses than the traditional panels.
  • the panel is formed by substantially cubic modules connected to each other.
  • Each module has planar mass elements arranged along the faces of the cube, without the faces of the cube being joined together along the edges. Instead, the faces of the cube are connected by stiffening elements placed inside the cube, with various possible substantially linear conformations, in particular straight or curvilinear, like for example circular or arched.
  • Aim of the present invention is to allow the realization of acoustic shielding devices based on metamaterials, which are realizable with simpler and economically competitive industrial processes.
  • connection module for the realization of a noise shielding device, and by an acoustic shielding device, according to any one of the appended claims.
  • connection module comprises a base element and a suspended mass element, spaced apart from each other in a thickness direction and connected to each other by means of connection elements.
  • a first face of the base element is provided for connection to a first panel of the device, and a second face of the suspended mass element is provided for connection to the second panel.
  • a perimeter edge of the suspended mass element, and an inner edge of an opening of the base element, are shaped so that, in a projection in the thickness direction, the shape of the suspended mass element is internal to the shape of the opening of the base element.
  • the module can be made simply by injection moulding.
  • the cost of injection moulding itself, and of the materials suitable for injection moulding, for example regenerated PVC, are drastically lower than 3D moulding, and more competitive than the traditional panels.
  • the regenerated PVC also makes the product eco-sustainable.
  • the desired mass and stiffness properties can be obtained in order to achieve an optimal sound-insulating power, with limited thicknesses and weights.
  • a noise shielding device is indicated in the figures by the numeral 100.
  • the shielding device 100 comprises two stiff panels 110, arranged parallel to each other, spaced apart from each other in a thickness direction X-X, and facing each other in the thickness direction X-X.
  • the two panels 110 therefore delimit a gap 120 between them, shown in figure 5 .
  • the two panels 110 may be made in a known manner in one or more layers, without, however, the panels 110 necessarily having significant noise shielding properties per se.
  • the shielding device 100 further comprises a plurality of connection modules 1, preferably identical to each other. Therefore, the modules 1 can be realized in series and used in the most appropriate number and position for the specific desired application.
  • the modules 1 are arranged between the two panels 110, inside the gap 120, and connect the two panels 110 to each other. It is worth noting that the modules 1 can be provided separately from the panels 110, and subsequently assembled with panels 110 of simple realization and easily available, to make a shielding device 100. In the following, a single connection module 1 will be described with reference to the characteristics of all modules 1.
  • connection module 1 is realizable by injection moulding, and is preferably formed in a single piece.
  • the preferred material for the connection module 1 is polyvinylchloride (PVC), specifically regenerated PVC.
  • the module 1 comprises a base element 2 and a suspended mass element 3, connected to each other.
  • the base element 2 and the suspended mass element 3 each comprise a first face 21, 31 facing toward a first of the two panels 110, and a second face 22, 32, opposite the respective first face 21, 31 and facing toward a second of the two panels 110.
  • the first face 21 of the base element 2 is configured for connection to the first panel 110 and is in contact with the first panel 110, while the first face 31 of the suspended mass element 3 is spaced apart from the first panel 110.
  • the second face 22 of the base element 2 is spaced apart from the second panel 110, while the second face 32 of the suspended mass element 3 is configured for connection to the second panel 110 and is in contact with the second panel 110. Therefore, the base element 2 and the suspended mass element 3 are spaced apart or staggered from each other in the thickness direction X-X.
  • the first face 21 of the base element 2 and the second face 32 of the suspended mass element 3 are preferably substantially planar.
  • modules 1 of the device 100 can all have the base element 2 connected to the same first panel 110 and the suspended mass element 3 connected to the same second panel 110, or each panel can be connected to the base element 2 of at least one module 1 and to the suspended mass element 3 of at least another module 1. It is to be understood that, for each module 1, the first face 21 of the base element 2 and the second face 32 of the suspended mass element 3 are fixed to two distinct panels 110.
  • the suspended mass element 3 has a perimeter edge 33, around the second face 32, with a first predetermined shape, also referred to below as the shape of the suspended mass element 3.
  • the preferred shape for the suspended mass element 3 is illustrated in figures 1 and 2 .
  • Figures 3 and 4 show other simplified examples, with suspended mass elements of rhomboidal and circular shape.
  • the base element 2 has a through opening 23 having an inner edge 24 with a second predetermined shape, also referred to below as the shape of the opening 23.
  • the first predetermined shape when projected along the X-X thickness direction, is internal to the second predetermined shape.
  • a projection view along the thickness direction X-X is shown in Fig. 2 .
  • the shape of the suspended mass element 3 is such that the suspended mass element, if translated along the thickness direction X-X would be suitable to be contained in the opening 23 of the base element 2.
  • this translation is prevented in the preferred embodiments for the connection modes between the suspended mass element 3 and the base element 2, detailed below.
  • injection moulding entails pouring liquid material between two half-moulds, causing the liquid material to solidify, and separating the half-moulds from each other.
  • the described conformation of the suspended mass element 3 and of the opening 23 of the base element 2 allows the separation of the half-moulds also following the solidification of the material.
  • the shape of the suspended mass element 3 defines in the second face 32 a central portion 34 of the suspended mass element 3 and a plurality of lobes 35 of the suspended mass element 3.
  • the lobes 35 are distributed circumferentially around the central portion 34, and protrude radially from the central portion 34.
  • each lobe 35 has one or more tabs 36 extending predominantly in the radial direction.
  • radial direction is meant a direction, in a plane perpendicular to the thickness direction X-X, extending away from a centre, placed in the central portion 34 of the suspended mass element 3.
  • circumferential direction is meant a direction, in a plane perpendicular to the thickness direction X-X, which wraps around the aforementioned centre. The radial, circumferential and thickness directions therefore identify a system of cylindrical coordinates.
  • the perimeter edge 33 of the suspended mass element 3 and the inner edge 24 of the opening 23 of the base element 2 delimit a gap 4 between them.
  • the perimeter edge 33 and the inner edge 24 are spaced apart from each other in the thickness direction X-X and/or in the radial direction.
  • the inner edge 24 of the base element 2 develops at least in part along the perimeter edge 33 of the suspended mass element 3, although spaced apart therefrom. Therefore, some portions of the inner edge 24 and of the perimeter edge 33 (even if they were curvilinear) can be substantially parallel, i.e. be positioned at a substantially constant distance from each other, along their length extension.
  • the shape of the opening 23 has a plurality of peninsula portions 25 which, in a projection in the thickness direction X-X, are positioned between consecutive lobes 35 of the suspended mass element 3.
  • the peninsula portions 25, in a projection in the thickness direction X-X, extend radially towards the central portion 34 of the suspended mass element 3.
  • the shape of the opening 23 has a plurality of gulf portions 26 joining consecutive peninsula portions 25.
  • connection module 1 has a plurality of connection elements 5 connecting the base element 2 and the suspended mass element 3.
  • the connection elements 5 are preferably shaped as connection legs, i.e. elements with predominantly linear development, without necessarily being straight, for example straight, curvilinear, broken lines, or a combination thereof.
  • connection elements 5 are also made in one piece with the base element 2 and the suspended mass element 3, in the same injection moulding process. Therefore, all these elements are made of the same material, substantially stiff.
  • connection elements 5 confers stiffness but also elasticity to the module 1.
  • a vibration for example acoustic
  • the stiffness or elasticity properties of the connection elements 5 are prevalent.
  • connection elements 5 can be designed so that the connection module 1 is similar to a mass and spring system, with the masses represented by the base and suspended mass elements 2, 3, and the springs represented by the connection elements 5.
  • connection element 5 has a first end portion 51 connected to the base element 2, a second end portion 52 connected to the suspended mass element 3, and a joining portion 53 connecting the first and second end portion 51, 52.
  • the connection element 5 can advantageously develop substantially linearly between the first and second end portion 51, 52.
  • the two end portions 51, 52 are spaced apart from each other at least in a radial direction. The spacing in the radial direction allows to increase the length of the connection elements 5, increasing the elasticity properties thereof.
  • connection elements 5 connect the base element 2 to the central portion 34 of the suspended mass element 3. More in detail, the connection elements 5 connect gulf portions 26 of the opening 23 of the base element 2 with the central portion 34 of the suspended mass element 3.
  • the lobes 35 increase the mass of the suspended mass element 3 and the surface of its second face 32 useful for connection to the second panel 110.
  • gulf portions 26, in a projection in the thickness direction X-X are arranged around lobes 35 of the suspended mass element 3, while other gulf portions 26, always in a projection, can be arranged around connection elements 5. At these latter gulf portions 26, the inner edge 24 of the opening 23 may also deviate significantly from the outer edge 33 of the suspended mass element 3.
  • the base element 2 in addition to the opening 23 with the inner edge 24, has an outer contour 27.
  • the outer contour 27 has four sides, and is substantially shaped as a square.
  • other shapes are possible, preferably such as to allow multiple modules 1 to be placed side by side along the sides of their outer contours 27, such as for example triangular or hexagonal shapes, or even other shapes, such as circular shapes.
  • the outer contour 27 of the base element 2 has a plurality of interlocking portions 28, 29, shaped for fixing multiple connection modules 2, preferably identical, side by side to one another.
  • the interlocking portions 28, 29 may comprise male interlocking portions 28, with an interlocking element protruding from the outer contour 27, and female interlocking portions 29, recessed towards the inside of the outer contour 27 and shaped to receive respective male interlocking portions 28.
  • Each side of the outer contour 27 may have a single interlocking portion 28, 29 or multiple interlocking portions 28, 29, which may all be male interlocking portions 28, all female interlocking portions 29, or a combination thereof.
  • connection modules 1 can be arranged spaced apart or in contact with each other, preferably interlocked with each other through the interlocking portions 28, 29. This is shown schematically in figures 6 and 7 , where for simplicity's sake the modules 1 have been represented substantially square, with a low level of detail, and dashed as they are covered by one of the panels 110.
  • a shielding device 100 has been described, two panels 110 of which have been mentioned, with a single gap 120 between them, and connection modules 1 in this gap 120.
  • Embodiments with three or more panels 110, which delimit two or more gaps 120, and multiple connection modules 1 in each gap 120 for connecting pairs of consecutive panels 110 are also possible.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Body Structure For Vehicles (AREA)
EP23199711.5A 2022-10-05 2023-09-26 Module de connexion pour un dispositif de protection contre le bruit Pending EP4350686A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200020508 2022-10-05

Publications (1)

Publication Number Publication Date
EP4350686A1 true EP4350686A1 (fr) 2024-04-10

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EP23199711.5A Pending EP4350686A1 (fr) 2022-10-05 2023-09-26 Module de connexion pour un dispositif de protection contre le bruit

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200471099Y1 (ko) * 2012-08-10 2014-02-03 성윤 전자드럼 연주용 방진보드
WO2019072746A1 (fr) 2017-10-09 2019-04-18 Politecnico Di Milano Dispositif de module d'isolation vis-à-vis des vibrations à basse fréquence et à large bande interdite et structure périodique associée
WO2019141794A1 (fr) 2018-01-19 2019-07-25 Politecnico Di Milano Dispositif de module d'isolation vibro-acoustique à basse fréquence et large spectre, et structure périodique relative
WO2022013274A1 (fr) * 2020-07-14 2022-01-20 Phononic Vibes S.R.L. Panneau multicouche ignifuge d'isolation acoustique
CN114619726A (zh) * 2022-03-09 2022-06-14 江苏科技大学 一种基于声学黑洞的新型点阵夹芯板及制作方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200471099Y1 (ko) * 2012-08-10 2014-02-03 성윤 전자드럼 연주용 방진보드
WO2019072746A1 (fr) 2017-10-09 2019-04-18 Politecnico Di Milano Dispositif de module d'isolation vis-à-vis des vibrations à basse fréquence et à large bande interdite et structure périodique associée
WO2019141794A1 (fr) 2018-01-19 2019-07-25 Politecnico Di Milano Dispositif de module d'isolation vibro-acoustique à basse fréquence et large spectre, et structure périodique relative
WO2022013274A1 (fr) * 2020-07-14 2022-01-20 Phononic Vibes S.R.L. Panneau multicouche ignifuge d'isolation acoustique
CN114619726A (zh) * 2022-03-09 2022-06-14 江苏科技大学 一种基于声学黑洞的新型点阵夹芯板及制作方法

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