EP2575127A1 - Elément d'absorption acoustique - Google Patents

Elément d'absorption acoustique Download PDF

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Publication number
EP2575127A1
EP2575127A1 EP11007957A EP11007957A EP2575127A1 EP 2575127 A1 EP2575127 A1 EP 2575127A1 EP 11007957 A EP11007957 A EP 11007957A EP 11007957 A EP11007957 A EP 11007957A EP 2575127 A1 EP2575127 A1 EP 2575127A1
Authority
EP
European Patent Office
Prior art keywords
plate
sound absorption
gaps
element according
absorption element
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.)
Granted
Application number
EP11007957A
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German (de)
English (en)
Other versions
EP2575127B1 (fr
EP2575127C0 (fr
Inventor
Kuhn Christian
Lunn Serge
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.)
Dukta GmbH
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Dukta GmbH
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.)
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Publication date
Application filed by Dukta GmbH filed Critical Dukta GmbH
Priority to ES11007957T priority Critical patent/ES2952382T3/es
Priority to EP11007957.1A priority patent/EP2575127B1/fr
Publication of EP2575127A1 publication Critical patent/EP2575127A1/fr
Application granted granted Critical
Publication of EP2575127B1 publication Critical patent/EP2575127B1/fr
Publication of EP2575127C0 publication Critical patent/EP2575127C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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 relates to a sound absorption element according to the preamble of claim 1 and to a method for producing the sound absorption element.
  • Sound that is generated in a room spreads out as an airborne sound wave and hits room boundary surfaces that partially absorb and partly reflect the sound.
  • room boundary surfaces that partially absorb and partly reflect the sound.
  • a device for producing a perforated plate is approximately in EP-A-0686963 described. This includes a rotating drum and a plurality of them mounted flexible polymer plates with needles embedded therein, which are intended to apply a predetermined gap pattern on an acoustic panel.
  • the CH-B-698 170 again refers to a sound absorbing element in the form of a dimpled sheet with holes, wherein the holes are formed as slit-like openings with smooth edges and smooth ends.
  • a particular directed to the improvement of the room acoustics sound absorption element is in the CH-B-697 277 disclosed.
  • This has a front side and a multiplicity of rotationally symmetrical recesses extending from the front side into the element, which have a section in which they taper in cross-section as viewed from the outside to the front side.
  • Object of the present invention is therefore to provide a sound absorption element with very good absorption properties, which can be easily manufactured and flexibly adapted to the respective room acoustics.
  • the invention relates to a sound absorbing element comprising a plate having a first plate surface intended to face a sound source and a second plate surface opposite and spaced from the first plate surface by the thickness of the plate and two opposite plate side surfaces.
  • the plate has transversely extending sound absorption gaps which are continuous in the thickness direction and non-continuous in the transverse direction and whose width is bounded in each case by two gap side surfaces spaced from each other.
  • the sound absorption gaps are thus open, as a result of which the sound impinging on the sound absorption element, according to the principle of the perforated plate vibrator, sets the air in the respective gap into oscillation.
  • At least two sound absorption gaps are arranged consecutively in the (perpendicular to the transverse direction) longitudinal direction.
  • a first part of the sound absorption gaps starts from a first of the two side surfaces of the plate and passes therethrough in the thickness direction through the plate; a second part of the sound absorption column starts from the second of the two plate side surfaces and at this in the thickness direction through the plate.
  • two longitudinally successive sound absorption gaps in the transverse direction are offset from one another and arranged overlapping each other.
  • the plate Due to the specific arrangement of the sound absorption column, the plate is flexible. This implies that the plate can be both stretched and compressed elastically by applying force parallel to its plane. In addition, there is flexibility transverse to the plane of the plate. In particular, the plate can be elastically bent or rotated (by the action of a torsional moment).
  • the plate is flexible even when a material comprising wood and / or plastic is used, which is naturally rigid.
  • the invention thus makes it possible to align the topography of the sound absorption element according to the respective space requirements in an almost unlimited manner.
  • the sound absorption gaps or the material webs formed between the sound absorption gaps can be aligned with the sound source in such a way that optimum sound absorption (through the gaps) or sound reflection and sound scattering (through the material) is obtained.
  • the flexibility of the plate allows almost any adjustment of the volume of air on the side facing away from the sound source side of the plate, whereby a very wide frequency spectrum can be absorbed.
  • the invention thus allows both in terms of sound absorption as well as in terms of sound reflection and sound scattering optimal adaptation to the particular room acoustics, which are also limited in terms of adaptation to the geometry of space limits.
  • the sound absorption element of the present invention thus necessarily has open sound absorption gaps. It differs fundamentally from previously known sound absorption elements in that the material is flexible due to the arrangement of the sound absorption gaps.
  • the width of the sound absorption gap i. the distance from the one gap side surface to the other side surface gap of a gap, greater than about 1.5 mm, preferably greater than about 3 mm.
  • the gap length and the respective gap from gap to gap are decisive for the flexibility of the plate and the absorption properties of the sound absorption element. These too can be optimally adapted depending on the objective.
  • the gap length is in a range of 40 mm to 200 mm, preferably in a range of 50 mm to 80 mm.
  • the distance between two longitudinally successive gaps is usually in a range of 2 mm to 15 mm, preferably in a range of 2 mm to 10 mm and particularly preferably in a range of 3 mm to 5 mm.
  • the plate is preferably formed of a material comprising wood and / or plastic, as is commonly used for wall coverings. As mentioned, the plate is flexible by the inventive arrangement of the sound absorption column in the choice of this material.
  • every second of the longitudinally superimposed sound absorption gaps is configured identically in terms of its extension and its arrangement in the transverse direction, which is likewise in the sense of uniform flexibility and, moreover, of a highly aesthetic appearance.
  • the sound absorption gaps have a rectangular shape in a section through a sectional plane running parallel to the plate surfaces. Such a plate is easily accessible from a production point of view, as described below in connection with the method according to the invention, and moreover exhibits very good absorption properties.
  • the column side surfaces in the unbent state of the plate, extend in mutually substantially parallel planes. This is in the Contradiction with the relevant prior art documents, in particular the doctrine of CH-B-697 277 according to which it is precisely essential that the side wall of the recess has an inclination varying over the depth of the recess.
  • the sound absorption gaps it is also conceivable, however, for the sound absorption gaps to have a different axisymmetric shape than a rectangular shape in a section through a sectional plane running parallel to the plate surfaces.
  • a lens mold it is also conceivable, however, for the sound absorption gaps to have a different axisymmetric shape than a rectangular shape in a section through a sectional plane running parallel to the plate surfaces.
  • At least one of the sound absorption gaps is designed in such a way that its extension in the transverse direction (i.e., its length) in the thickness direction decreases at least in sections continuously. This results in a Schallaufauer- or sound collection effect, which further enhances the absorption properties of the inventive sound absorption element.
  • the plate can be formed from two identical partial plates, each with different gap patterns on their partial plate surfaces, wherein the partial plates are connected such that the respective partial plate surfaces lie on each other with the same slit pattern.
  • the resulting plate thus has the same gap pattern on both sides; Although it is formed of two partial plates, it is nonetheless flexible.
  • those partial plate surfaces are connected to each other, on which the sound absorption gaps have a shorter length than on the opposing partial plate surface.
  • a textile layer between the plates This can be used for about the adjustment of the flexibility or the strength of the plate. It is also conceivable, however, to provide a sound-absorbing textile, such as an acoustic fleece, in order to additionally increase the absorption properties.
  • connection of the two plates can be made by any conceivable method which appears suitable to the person skilled in the art and generally takes place by means of a bond.
  • At least two of the sound absorption gaps lie on a straight line in the transverse direction. Consequently, there are several separate sound absorption gaps on a transverse straight line, which are separated from one another by material webs. This allows the Flexibility of the plate can be adjusted in almost any way without their stability would be unacceptably impaired.
  • at least one of the two side walls of the plate does not extend from the sound absorption gaps lying on a straight line. As a result, a very high strength is ensured without this would severely affect the achievable flexibility.
  • a sound absorption gap or two or more sound absorption gaps lying on a straight line in a region near the surface may be further preferred for a sound absorption gap or two or more sound absorption gaps lying on a straight line in a region near the surface to form a groove extending from one plate side surface to the other plate side surface. It is conceivable that the groove is formed only on one or both plate surfaces.
  • the longitudinally successive sound absorption gaps are each equidistant, which results in uniform flexibility over the entire length of the component.
  • the plate it is also conceivable for the plate to have two further plate surfaces running at right angles to the described plate surfaces and plate side surfaces, in which sound absorbing gaps in turn are arranged as described above.
  • the longitudinal direction corresponds to the first two opposite plate surfaces of the thickness direction with respect to the second two opposing plate surfaces and vice versa.
  • the present invention relates to a method for producing the above-described sound absorption element, wherein the plate is obtained from a plate-shaped structure in which the absorption gaps are formed by removing material.
  • the removal of material by means of a circular saw preferably a multi-blade circular saw unit.
  • the circular saw is moved in the transverse direction parallel to the plate surface, wherein it is lowered at the points provided for this purpose in the thickness direction in the plate. More preferably, the circular saw oscillates in the thickness direction while being transversely driven, describing a sinusoidal curve.
  • the plate 2 of the inventive sound absorbing member comprises a first plate surface 4 and a first plate surface opposite, in a plane parallel thereto and spaced by the thickness of the plate second plate surface 6.
  • the plate defines a longitudinal direction L and a transverse direction Q, such as in Fig. 4 is shown.
  • the plate has two opposite plate side surfaces 8, 10, which extend in a plane perpendicular to the plate surfaces 4, 6.
  • the plate 2 has transversely extending Schallabsorptionssspalte 12. These are continuous in the thickness direction D (see, for example, FIG Fig. 5 ) and in the transverse direction Q are not continuous and are each bounded by two spaced gap side surfaces 14, 16.
  • a plurality of sound absorption gaps 12 are arranged in succession.
  • a first part 12a of the sound absorption column 12 extends from a first of the two plate side surfaces 8 and at this in the thickness direction through the plate.
  • a second part 12b of the sound absorbing gaps 12 extends from the second of the two plate side surfaces 10 and therethrough in the thickness direction through the plate.
  • two successive in the longitudinal direction L Schallabsorptionssspalte 12 are offset in the transverse direction Q to each other and arranged overlapping each other.
  • every second one of the longitudinal absorption L superimposed sound absorption column 12 is designed to be identical in terms of its extension and its arrangement in the transverse direction Q.
  • the sound absorption gaps 12 have a rectangular shape, with their expansion in the transverse direction Q continuously decreasing in the thickness direction D, so that the expansion of the respective sound absorption gap 12 in the transverse direction Q on the first plate surface 4 is greater than on the second plate surface 6.
  • the sound absorption gaps 12 are milled into the plate such that they form (only) on one of the two plate surfaces 4 in a near-surface region 15 a groove 17 extending from one plate side surface 8 to the other plate side surface 10.
  • Such a plate is obtained approximately when the milling for generating the sound absorption gaps takes place only from one side, in the figure from the side of the first plate surface 4 ago. It is conceivable, for example, that the milling is done with a circular saw, which - while it is driven in the direction of a plate side surface 8 and 10 to the other plate side surface 10 and 8 - permanently sawed into the material of the plate.
  • FIG. 5 A corresponding sectional view is in Fig. 5 shown.
  • this material webs 18 are obtained, which have approximately the shape of an isosceles and symmetrical trapezium in section, the two diagonals are slightly curved concave.
  • corresponding material webs 18 ' are obtained, which is a form of a right triangular triangle with a curved concave hypotenuse on average.
  • the bending is due to the fact that, during sawing, the inclination of the gap in the thickness direction D continuously decreases from the first plate surface 4 to the second plate surface 6, and continuously increases from the second plate surface 6 to the first plate surface 4.
  • the sound absorption gaps 12 on both plate surfaces 4, 6 form a continuous groove 17 in a respective near-surface region 15.
  • Such a plate is obtained approximately when the milling for generating the sound absorption column of done on both sides; a corresponding sectional view with an approximately sectioned in the shape of a hexagon or an isosceles triangle material web 18 "or 18"'is analogous to Fig. 5 in Fig. 6 shown.
  • the plate thus obtained has one of the plate of Fig. 2 corresponding external appearance, ie that on both plate surfaces 4a, 4b the sound absorption gaps form a continuous groove.
  • a textile insert 20 - such as an acoustic fleece - is inserted, as in Fig. 3 will be shown.
  • the sound absorption obtained with the sound absorption element according to the invention is achieved by means of the in Fig. 7 shown results of the reverberation time shown.
  • the measurement was based on the standard SN EN ISO 3382 "Acoustics - Measurements of room acoustics parameters - Part 2: Reverberation time in ordinary rooms (ISO 3382-2: 2008)", using the precision method.
  • the measurement was carried out in a usual use according to the furnished room, with windows and doors were closed.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Building Environments (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP11007957.1A 2011-10-01 2011-10-01 Elément d'absorption acoustique Active EP2575127B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES11007957T ES2952382T3 (es) 2011-10-01 2011-10-01 Elemento de absorción acústica
EP11007957.1A EP2575127B1 (fr) 2011-10-01 2011-10-01 Elément d'absorption acoustique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11007957.1A EP2575127B1 (fr) 2011-10-01 2011-10-01 Elément d'absorption acoustique

Publications (3)

Publication Number Publication Date
EP2575127A1 true EP2575127A1 (fr) 2013-04-03
EP2575127B1 EP2575127B1 (fr) 2023-06-07
EP2575127C0 EP2575127C0 (fr) 2023-06-07

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EP (1) EP2575127B1 (fr)
ES (1) ES2952382T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105427852A (zh) * 2014-09-04 2016-03-23 北京市劳动保护科学研究所 一种吸声板
CH711582A1 (en) * 2015-09-29 2017-03-31 Akustik & Raum Ag Sound-absorbing element.
US12209426B2 (en) 2020-04-23 2025-01-28 Spinneybeck Enterprises Inc. Privacy enclosure

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116233U1 (de) * 1991-04-10 1992-06-17 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Schallabsorbierende Verglasung
EP0686963A2 (fr) 1994-06-08 1995-12-13 USG INTERIORS, Inc. Dispositif pour la production d'un panneau fissuré de plafond acoustique et procédé pour fabriquer ledit dispositif
EP1138842A1 (fr) 2000-03-27 2001-10-04 Mäger AG Innenausbau Procédé de fabrication d'un élément insonorisant en forme de panneau et dispositif pour la mise en oeuvre du procédé
WO2003030144A1 (fr) * 2001-09-27 2003-04-10 Faist Automotive Gmbh & Co. Kg Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes
US20050133302A1 (en) * 1999-05-06 2005-06-23 Klaus Pfaffelhuber Sound shielding element, use thereof and method of producing the same
CH697277B1 (de) 2003-08-18 2008-07-31 Holzindustrie Leitinger Ges M Schallabsorbierendes Element.
US7484592B2 (en) * 2001-04-17 2009-02-03 Airbus France Sound attenuation panel comprising a resistive layer with reinforced structural component
CH698170B1 (de) 2004-02-18 2009-06-15 Sevex Ag Schallabsorbierendes Element und Verfahren zur Herstellung desselben.
US20100301161A1 (en) * 2006-11-16 2010-12-02 Airbus France Acoustic coating for an aircraft incorporating a frost treatment system by joule effect

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH707224B1 (de) * 2007-07-23 2014-05-30 Serge Lunin Flächiges Bauelement.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116233U1 (de) * 1991-04-10 1992-06-17 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Schallabsorbierende Verglasung
EP0686963A2 (fr) 1994-06-08 1995-12-13 USG INTERIORS, Inc. Dispositif pour la production d'un panneau fissuré de plafond acoustique et procédé pour fabriquer ledit dispositif
US20050133302A1 (en) * 1999-05-06 2005-06-23 Klaus Pfaffelhuber Sound shielding element, use thereof and method of producing the same
EP1138842A1 (fr) 2000-03-27 2001-10-04 Mäger AG Innenausbau Procédé de fabrication d'un élément insonorisant en forme de panneau et dispositif pour la mise en oeuvre du procédé
US7484592B2 (en) * 2001-04-17 2009-02-03 Airbus France Sound attenuation panel comprising a resistive layer with reinforced structural component
WO2003030144A1 (fr) * 2001-09-27 2003-04-10 Faist Automotive Gmbh & Co. Kg Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes
CH697277B1 (de) 2003-08-18 2008-07-31 Holzindustrie Leitinger Ges M Schallabsorbierendes Element.
CH698170B1 (de) 2004-02-18 2009-06-15 Sevex Ag Schallabsorbierendes Element und Verfahren zur Herstellung desselben.
US20100301161A1 (en) * 2006-11-16 2010-12-02 Airbus France Acoustic coating for an aircraft incorporating a frost treatment system by joule effect

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105427852A (zh) * 2014-09-04 2016-03-23 北京市劳动保护科学研究所 一种吸声板
CH711582A1 (en) * 2015-09-29 2017-03-31 Akustik & Raum Ag Sound-absorbing element.
US12209426B2 (en) 2020-04-23 2025-01-28 Spinneybeck Enterprises Inc. Privacy enclosure

Also Published As

Publication number Publication date
EP2575127B1 (fr) 2023-06-07
ES2952382T3 (es) 2023-10-31
EP2575127C0 (fr) 2023-06-07

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