EP0745738A1 - Acoustic panel as well as procedure for production of the same - Google Patents

Acoustic panel as well as procedure for production of the same Download PDF

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Publication number
EP0745738A1
EP0745738A1 EP95890167A EP95890167A EP0745738A1 EP 0745738 A1 EP0745738 A1 EP 0745738A1 EP 95890167 A EP95890167 A EP 95890167A EP 95890167 A EP95890167 A EP 95890167A EP 0745738 A1 EP0745738 A1 EP 0745738A1
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EP
European Patent Office
Prior art keywords
layer
grooves
slits
acoustic panel
cover layer
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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
EP95890167A
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German (de)
French (fr)
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EP0745738B1 (en
Inventor
Michael Albert Dipl-Ing. Stache
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Wiesner-Hager Baugruppe Gesmbh
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Wiesner-Hager Baugruppe Gesmbh
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    • 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
    • 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
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • 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
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/849—Groove or slot type openings
    • 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
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Definitions

  • the invention relates to an acoustic panel and a method for producing the same.
  • Acoustic panels made of wood-based materials usually plywood panels, with row holes at certain center distances are currently available. These holes are through holes and have the task of absorbing the sound that occurs in a reverberation room (e.g. gyms or similar), i.e. to reduce or specifically influence the reverberation time in the reverberation room by converting the sound energy into thermal energy.
  • This degree of sound absorption can be influenced in acoustic panels with through holes by attaching a sound-absorbing insulating material over the entire surface on the side facing away from the reverberation room and using a suitable substructure to create a defined distance (enclosed reverberation room volume) from the supporting wall or ceiling. With the change in the enclosed reverberation volume, the measurement curves in the third octave bands can be shifted slightly. Additional options for influencing are offered by varying the plate thickness and the proportion of holes (by changing the hole pattern and / or hole diameter).
  • laminated veneer lumber or plywood panels are currently being produced, which have a regular slit structure in the surface.
  • the panels are whole (slit-shaped opening) or partially slotted.
  • the degree of sound absorption of the partially slotted panels can be influenced by varying the slot depth, the slot spacing and the slot width. The same influencing options apply to the slotted plates as to the drilled plates.
  • MDF boards Medium Density Fibreboard
  • acoustic panel is slotted on the visible side up to the middle of the board thickness and drilled from the back in the form of row holes to the bottom of the slot.
  • the same variation options apply to this type of acoustic panel as to the exclusively drilled version.
  • the object of the invention is to provide an acoustic panel, the sound-absorbing effect of which is significantly improved over that of the known acoustic panels made of wood-based materials by utilizing basic physical or acoustic principles.
  • an acoustic panel which is characterized according to the invention in that it consists of a three-layer solid wood panel with two top layers running parallel to one another with respect to the fiber direction and a central layer running transversely to these there is that the (layer side) cover layer has longitudinally extending and reaching to the central position slits, and that the central layer on its side facing the slotted cover layer has parallel, the slots cutting grooves.
  • the invention is based on the idea of letting the sound impinging obliquely on the plate level run dead with the aid of a cavity within the plate cross section by means of multiple sound reflection between the cavity walls.
  • a plurality of such cavities is formed within the panel cross section by the grooves provided in the central position and cutting the slots in the cover layer on the reverberation chamber side.
  • the sound enters these cavities at the intersections of these slots and grooves and is reflected several times by the walls thereof. With every reflection, the sound within the cavities loses energy, as this is converted into heat due to the friction that occurs.
  • the degree of sound absorption achievable with an acoustic panel according to the invention can be influenced essentially by varying the slot and / or groove spacing, and to a lesser extent by different groove depths and slot and / or groove shapes.
  • the grooves of the central layer cut the slits of the cover layer on the reverberation chamber side at a right angle, since this facilitates the manufacture of the plate because the grooves are then to be produced in the longitudinal direction of the boards forming the central layer.
  • the slits and / or grooves can have a rectangular, rounded, triangular, chamfered, or caries-arch cross-section.
  • the other cover layer can also have slits extending in the longitudinal direction and reaching to the middle layer, which are preferably aligned with the slits of one cover layer, and the middle layer on its side facing the other cover layer parallel and coinciding with the slits of the other cover layer Have grooves, the sum of the depths of the grooves on both sides of the middle layer being greater than the thickness of the middle layer.
  • This design creates openings at the interfaces of the grooves, through which the sound can also pass through the panel, as is the case with the known slotted or drilled acoustic panels, so that there is a further possibility of influencing the degree of sound absorption.
  • the process is first planed or milled in boards intended for the central position on one side in parallel grooves which preferably run in the longitudinal direction of the boards, then the boards provided with the grooves with the boards forming the two top layers in the press be glued to a blank plate, then the blank plate is cut into panels of the size intended for the finished acoustic panel, and finally with the help of planing or milling tools in the one adjacent to the grooves of the central layer (on the hall side) of such a cover layer Plate slits running in the longitudinal direction and reaching to the central position are produced, whereby in the other cover layer, too, longitudinal slits are produced, preferably aligned with the slits of the one cover layer, which extend into the central position and thus simultaneously in the central position with the Slots of this other top layer form coincident grooves.
  • FIG. 1 shows an oblique view of a first embodiment of the acoustic panel according to the invention
  • FIG. 2 shows the acoustic panel according to FIG. 1 in plan view
  • FIG. 3 shows an oblique view of a second embodiment of the acoustic panel according to the invention
  • FIG. 4 shows the acoustic panel according to FIG. 3 in top view.
  • 1 and 2 consists of a three-layer solid wood panel with two cover layers 1, 2 running parallel to each other with respect to the fiber direction, of which the cover layer 1 represents the cover layer on the reverberation chamber side, and a central layer 3 running transversely to these cover layers.
  • the basic structure of this three-layer solid wood panel corresponds to the guidelines of the ⁇ -Norm B3022.
  • the cover layer 1 on the reverberation chamber side has slits 1 a extending in the longitudinal direction and extending to the central position 3.
  • parallel grooves 3a are provided which cut the slits 1a at an angle of 90 ° and which form cavities within the plate cross section which undercut the slits 1a. From the walls of these cavities, the sound entering the acoustic panel at the intersections of the slots 1a and grooves 3a is reflected several times, so that its energy is converted into heat by the resulting friction.
  • FIGS. 3 and 4 represents a further development of the invention, as the top layer 2 has longitudinally extending and up to the middle layer 3 slits 2a, which are aligned with the slits 1a, and the middle layer 3 on their Cover layer 2 facing side has further grooves 3b, which coincide with the slots 2a of the cover layer 2.
  • the depths of the grooves 3a and 3b are dimensioned such that their sum exceeds the thickness of the central layer 3, so that openings 4 (shown hatched in FIG.
  • the grooves 3a of the central layer 3 it is not absolutely necessary for the grooves 3a of the central layer 3 to cut the slots 1a of the cover layer 1 at a right angle, although this is currently the preferred embodiment.
  • An inclination of the grooves 3a with respect to the slots 1a could e.g. serve to produce decorative patterns in a wall or ceiling to be clad with acoustic panels according to the invention.
  • the slits 1a are as over the entire acoustic panel shown throughout. However, it would also be possible to interrupt these slits at locations where there are no grooves 3a or to let them end before the edge of the plate. A decorative effect could also be achieved with this.
  • these cross sections can also have any other suitable shape instead of the rectangular shape shown.
  • rounded, triangular, chamfered or caries-like cross-sections also lend themselves here.
  • the sound absorption effect of the acoustic panel can be influenced to a certain extent via the cross-sectional shape of the slots 1a and grooves 3a.
  • various decorative effects can be achieved through the various cross-sectional shapes.
  • the procedure for producing the acoustic panel according to the invention is as follows.
  • the grooves 3a are planed or milled on one side into the boards intended for the formation of the middle layer 3.
  • the middle-layer boards prepared in this way are integrated into the normal production process for three-layer solid wood panels and glued to a board blank in the press with the boards forming the two top layers 1 and 2.
  • the cover layer 1 After the press has been emptied, the grooves 3a of the middle layer are covered by the cover layer 1.
  • the blank disc is then formatted, i.e. cut into individual panels of the size intended for the acoustic panels.
  • the top layer 1 of such a board is slit in the run up to the middle layer 3 with the help of planing or milling tools (slits 1a), whereby an acoustic board according to FIG. 1 is completed.
  • the top layer 2 In the case of the acoustic panel according to FIG. 2, the top layer 2, u. between. In the middle layer 3, slotted, whereby at the same time the slots 2a of the top layer 2 and the coincident with these slots 3b grooves of the middle layer 3 are formed.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Panels For Use In Building Construction (AREA)

Abstract

The acoustic panel is made from a triple-layered solid wooden board with two cover layers (1,2) parallel to each other in relation to the fibre direction and one centre layer (3) running across it. The cover layer (1) on the room side has longitudinally aligned slits (1a) reaching to the centre layer. The centre layer has on its side facing this slit layer grooves (3a) crossing the slits. The grooves and slits criss-cross at right angles. The slits and/or grooves can have a rectangular, rounded, triangular or chamfered cross- section. The other cover layer can also have slits aligned with those of the room-facing layer.

Description

Die Erfindung betrifft eine Akustikplatte sowie ein Verfahren zur Herstellung derselben.The invention relates to an acoustic panel and a method for producing the same.

Derzeit werden Akustikplatten aus Holzwerkstoffen, in der Regel Sperrholzplatten, mit Reihenlochbohrungen in bestimmten Achsabständen angeboten. Diese Bohrungen sind Durchgangsbohrungen und haben die Aufgabe, in einem Hallraum (z.B.: Turnhallen od. ähnl.) den auftretenden Schall zu absorbieren, d.h. durch Umwandlung der Schallenergie in Wärmeenergie die Nachhallzeit im Hallraum zu verringern bzw. gezielt zu beeinflussen. Zur Charakterisierung der Schallabsorption dient der Schallabsorptionsgrad (α = absorbierende Energie / auftreffende Energie).Acoustic panels made of wood-based materials, usually plywood panels, with row holes at certain center distances are currently available. These holes are through holes and have the task of absorbing the sound that occurs in a reverberation room (e.g. gyms or similar), i.e. to reduce or specifically influence the reverberation time in the reverberation room by converting the sound energy into thermal energy. The degree of sound absorption is used to characterize sound absorption (α = absorbing energy / incident energy).

Dieser Schallabsorptionsgrad ist bei Akustikplatten mit Durchgangsbohrungen beeinflußbar, indem man auf der dem Hallraum abgewandten Seite ein schallabsorbierendes Dämmaterial vollflächig befestigt und mit Hilfe einer geeigneten Unterkonstruktion einen definierten Abstand (eingeschlossenes Hallraumvolumen) zur tragenden Wand oder Decke herstellt. Mit der Veränderung des eingeschlossenen Hallraumvolumens können die Meßkurven in den Terzbändern leicht verschoben werden. Zusätzliche Möglichkeiten zur Beeinflussung bieten sich durch Variation der Plattendicke und des Lochanteils (durch Änderung der Lochraster und/oder Lochdurchmesser).This degree of sound absorption can be influenced in acoustic panels with through holes by attaching a sound-absorbing insulating material over the entire surface on the side facing away from the reverberation room and using a suitable substructure to create a defined distance (enclosed reverberation room volume) from the supporting wall or ceiling. With the change in the enclosed reverberation volume, the measurement curves in the third octave bands can be shifted slightly. Additional options for influencing are offered by varying the plate thickness and the proportion of holes (by changing the hole pattern and / or hole diameter).

Ferner werden derzeit Furnierschichtholz- bzw. Sperrholzplatten erzeugt, welche in der Oberfläche eine regelmäßige Schlitzstruktur besitzen. Je nach Einsatz sind die Platten ganz (schlitzförmiger Durchbruch) oder teilweise geschlitzt. Der Schallabsorptionsgrad der teilweise geschlitzten Platten kann durch Variation der Schlitztiefe, der Schlitzabstände und der Schlitzbreite beeinflußt werden. Für die durchgeschlitzten Platten gelten die gleichen Beeinflussungsmöglichkeiten wie für die durchgebohrten Platten.Furthermore, laminated veneer lumber or plywood panels are currently being produced, which have a regular slit structure in the surface. Depending on the application, the panels are whole (slit-shaped opening) or partially slotted. The degree of sound absorption of the partially slotted panels can be influenced by varying the slot depth, the slot spacing and the slot width. The same influencing options apply to the slotted plates as to the drilled plates.

Weiterhin ist eine dritte Variante bekannt, welche eine Kombination aus den obengenannten Ausführungen darstellt. In diesem Fall werden MDF-Platten (Medium Density Fibreboard = Mitteldichte Faserplatte) auf der Sichtseite ca. bis zur Mitte der Plattendicke geschlitzt und von der Rückseite in Form von Reihenbohrungen bis zum Grund des Schlitzes durchbohrt. Auch für diesen Typ von Akustikplatte gelten die gleichen Variationsmöglichkeiten, wie sie auch für die ausschließlich durchgebohrte Version gelten.Furthermore, a third variant is known, which represents a combination of the above-mentioned statements. In this case, MDF boards (Medium Density Fibreboard) are slotted on the visible side up to the middle of the board thickness and drilled from the back in the form of row holes to the bottom of the slot. The same variation options apply to this type of acoustic panel as to the exclusively drilled version.

Aufgabe der Erfindung ist, eine Akustikplatte anzugeben, deren schallabsorbierende Wirkung gegenüber jener der bekannten Akustikplatten aus Holzwerkstoffen durch Ausnutzung physikalischer bzw. schalltechnischer Grundgesetze entscheidend verbessert ist.The object of the invention is to provide an acoustic panel, the sound-absorbing effect of which is significantly improved over that of the known acoustic panels made of wood-based materials by utilizing basic physical or acoustic principles.

Diese Aufgabe wird durch eine Akustikplatte gelöst, die erfindungsgemäß dadurch gekennzeichnet ist, daß sie aus einer Dreischicht-Massivholzplatte mit zwei in bezug auf die Faserrichtung parallel zueinander verlaufenden Decklagen und einer zu diesen querverlaufenden Mittellage besteht, daß die eine (hallraumseitige) Decklage in Längsrichtung verlaufende und bis zur Mittellage reichende Schlitzungen aufweist, und daß die Mittellage auf ihrer der geschlitzten Decklage zugewandten Seite parallele, die Schlitzungen schneidende Nuten besitzt.This object is achieved by an acoustic panel, which is characterized according to the invention in that it consists of a three-layer solid wood panel with two top layers running parallel to one another with respect to the fiber direction and a central layer running transversely to these there is that the (layer side) cover layer has longitudinally extending and reaching to the central position slits, and that the central layer on its side facing the slotted cover layer has parallel, the slots cutting grooves.

Die Erfindung basiert auf der Idee, den schräg auf die Plattenebene auftreffenden Schall mit Hilfe eines Hohlraumes innerhalb des Plattenquerschnitts durch mehrfache Schallreflexion zwischen den Hohlraumwänden totlaufen zu lassen.The invention is based on the idea of letting the sound impinging obliquely on the plate level run dead with the aid of a cavity within the plate cross section by means of multiple sound reflection between the cavity walls.

Bei der erfindungsgemäßen Akustikplatte wird durch die in der Mittellage vorgesehenen und die Schlitzungen der hallraumseitigen Decklage schneidenden Nuten eine Vielzahl solcher Hohlräume innerhalb des Plattenquerschnitts gebildet. Der Schall tritt an den Schnittstellen dieser Schlitzungen und Nuten in diese Hohlräume ein und wird von den Wänden derselben mehrfach reflektiert. Mit jeder Reflexion verliert der Schall innerhalb der Hohlräume an Energie, da diese aufgrund der entstehenden Reibung in Wärme umgesetzt wird. Der Grad der mit einer erfindungsgemäßen Akustikplatte erreichbaren Schallabsorption ist im wesentlichen durch Variation der Schlitz- und/oder Nutabstände, und in beschränkterem Maß durch unterschiedliche Nuttiefen und Schlitz- und/oder Nutformen beeinflußbar.In the acoustic panel according to the invention, a plurality of such cavities is formed within the panel cross section by the grooves provided in the central position and cutting the slots in the cover layer on the reverberation chamber side. The sound enters these cavities at the intersections of these slots and grooves and is reflected several times by the walls thereof. With every reflection, the sound within the cavities loses energy, as this is converted into heat due to the friction that occurs. The degree of sound absorption achievable with an acoustic panel according to the invention can be influenced essentially by varying the slot and / or groove spacing, and to a lesser extent by different groove depths and slot and / or groove shapes.

In der bevorzugten Ausführungsform schneiden die Nuten der Mittellage die Schlitzungen der hallraumseitigen Decklage unter einem rechten Winkel, da dies die Herstellung der Platte erleichtert, weil die Nuten dann in Längsrichtung der die Mittellage bildenden Bretter herzustellen sind.In the preferred embodiment, the grooves of the central layer cut the slits of the cover layer on the reverberation chamber side at a right angle, since this facilitates the manufacture of the plate because the grooves are then to be produced in the longitudinal direction of the boards forming the central layer.

Nach weiteren Merkmalen der Erfindung können die Schlitzungen und/oder Nuten im Querschnitt rechteckig, gerundet, dreieckig, abgefast oder karniesbogenförmig ausgebildet sein.According to further features of the invention, the slits and / or grooves can have a rectangular, rounded, triangular, chamfered, or caries-arch cross-section.

Gemäß einer Weiterbildung der Erfindung kann auch die andere Decklage in Längsrichtung verlaufende und bis zur Mittellage reichende Schlitzungen aufweisen, die vorzugsweise mit den Schlitzungen der einen Decklage fluchten, und die Mittellage auf ihrer der anderen Decklage zugewandten Seite parallele und mit den Schlitzungen der anderen Decklage zusammenfallende Nuten besitzen, wobei die Summe der Tiefen der Nuten auf den beiden Seiten der Mittellage größer ist als die Dicke der Mittellage. Durch diese Ausbildung entstehen an den Schnittstellen der Nuten Durchbrüche, durch die der Schall auch durch die Platte hindurchtreten kann, wie es bei den bekannten durchgeschlitzten oder durchgebohrten Akustikplatten der Fall ist, sodaß sich hier eine weitere Möglichkeit einer Beeinflussung des Schallabsorptionsgrades ergibt.According to a further development of the invention, the other cover layer can also have slits extending in the longitudinal direction and reaching to the middle layer, which are preferably aligned with the slits of one cover layer, and the middle layer on its side facing the other cover layer parallel and coinciding with the slits of the other cover layer Have grooves, the sum of the depths of the grooves on both sides of the middle layer being greater than the thickness of the middle layer. This design creates openings at the interfaces of the grooves, through which the sound can also pass through the panel, as is the case with the known slotted or drilled acoustic panels, so that there is a further possibility of influencing the degree of sound absorption.

Zur Herstellung einer erfindungsgemäßen Akustikplatte wird so vorgegangen, daß zunächst in für die Mittellage bestimmten Brettern einseitig parallele und vorzugsweise in Längsrichtung der Bretter verlaufende Nuten gehobelt bzw. gefräst werden, sodann die mit den Nuten versehenen Bretter mit die beiden Decklagen bildenden Brettern in der Presse zu einem Plattenrohling verleimt werden, danach der Plattenrohling zu Platten der für die fertige Akustikplatte vorgesehenen Größe geschnitten wird, und schließlich mit Hilfe von Hobel- bzw. Fräswerkzeugen in der den Nuten der Mittellage benachbarten einen (hallraumseitigen) Decklage einer solchen Platte in Längsrichtung verlaufende und bis zur Mittellage reichende Schlitzungen hergestellt werden, wobei gegebenenfalls auch in der anderen Decklage in Längsrichtung verlaufende und vorzugsweise mit den Schlitzungen der einen Decklage fluchtende Schlitzungen hergestellt werden, die bis in die Mittellage hineinreichen und damit gleichzeitig in der Mittellage mit den Schlitzungen dieser anderen Decklage zusammenfallende Nuten bilden.To produce an acoustic panel according to the invention, the process is first planed or milled in boards intended for the central position on one side in parallel grooves which preferably run in the longitudinal direction of the boards, then the boards provided with the grooves with the boards forming the two top layers in the press be glued to a blank plate, then the blank plate is cut into panels of the size intended for the finished acoustic panel, and finally with the help of planing or milling tools in the one adjacent to the grooves of the central layer (on the hall side) of such a cover layer Plate slits running in the longitudinal direction and reaching to the central position are produced, whereby in the other cover layer, too, longitudinal slits are produced, preferably aligned with the slits of the one cover layer, which extend into the central position and thus simultaneously in the central position with the Slots of this other top layer form coincident grooves.

Nachstehend ist die Erfindung anhand der Zeichnungen näher erläutert. In diesen zeigen: Fig. 1 eine Schrägansicht einer ersten Ausführungsform der erfindungsgemäßen Akustikplatte, Fig. 2 die Akustikplatte nach Fig. 1 in Draufsicht, Fig. 3 eine Schrägansicht einer zweiten Ausführungsform der erfindungsgemäßen Akustikplatte, und Fig. 4 die Akustikplatte nach Fig. 3 in Draufsicht.The invention is explained in more detail below with reference to the drawings. 1 shows an oblique view of a first embodiment of the acoustic panel according to the invention, FIG. 2 shows the acoustic panel according to FIG. 1 in plan view, FIG. 3 shows an oblique view of a second embodiment of the acoustic panel according to the invention, and FIG. 4 shows the acoustic panel according to FIG. 3 in top view.

Die in den Fig. 1 und 2 dargestellte Akustikplatte besteht aus einer Dreischicht-Massivholzplatte mit zwei in bezug auf die Faserrichtung parallel zueinander verlaufenden Decklagen 1,2, von denen die Decklage 1 die hallraumseitige Decklage darstellt, und einer zu diesen Decklagen querverlaufenden Mittellage 3. Der grundsätzliche Aufbau dieser Dreischicht-Massivholzplatte entspricht den Richtlinien der Ö-Norm B3022.1 and 2 consists of a three-layer solid wood panel with two cover layers 1, 2 running parallel to each other with respect to the fiber direction, of which the cover layer 1 represents the cover layer on the reverberation chamber side, and a central layer 3 running transversely to these cover layers. The basic structure of this three-layer solid wood panel corresponds to the guidelines of the Ö-Norm B3022.

Erfindungsgemäß weist die hallraumseitige Decklage 1 in Längsrichtung verlaufende und bis zur Mittellage 3 reichende Schlitzungen 1a auf. Auf der dieser Decklage 1 zugewandten Seite der Mittellage 3 sind parallele, die Schlitzungen 1a unter einem Winkel von 90° schneidende Nuten 3a vorgesehen, die die Schlitzungen 1a hinterschneidende Hohlräume innerhalb des Plattenquerschnitts bilden. Von den Wänden dieser Hohlräume wird der an den Schnittstellen der Schlitzungen 1a und Nuten 3a in die Akustikplatte eintretende Schall mehrfach reflektiert, sodaß seine Energie durch die dabei entstehende Reibung in Wärme umgewandelt wird.According to the invention, the cover layer 1 on the reverberation chamber side has slits 1 a extending in the longitudinal direction and extending to the central position 3. On the side of the middle layer 3 facing this cover layer 1, parallel grooves 3a are provided which cut the slits 1a at an angle of 90 ° and which form cavities within the plate cross section which undercut the slits 1a. From the walls of these cavities, the sound entering the acoustic panel at the intersections of the slots 1a and grooves 3a is reflected several times, so that its energy is converted into heat by the resulting friction.

Die in den Fig. 3 und 4 gezeigte Ausführungsform stellt insoferne eine Weiterbildung der Erfindung dar, als auch die Decklage 2 in Längsrichtung verlaufende und bis zur Mittellage 3 reichende Schlitzungen 2a aufweist, die mit den Schlitzungen 1a fluchten, und die Mittellage 3 auf ihrer der Decklage 2 zugewandten Seite weitere Nuten 3b besitzt, die mit den Schlitzungen 2a der Decklage 2 zusammenfallen. Die Tiefen der Nuten 3a und 3b sind dabei so bemessen, daß ihre Summe die Dicke der Mittellage 3 übersteigt, sodaß an den Schnittstellen der Nuten 3a und 3b Durchbrüche 4 (in Fig. 4 schraffiert dargestellt) vorhanden sind, durch die der Schall auch durch die Akustikplatte hindurchtreten kann, wodurch eine zusätzliche Schallabsorptionswirkung, wie sie bei den bekannten durchgeschlitzten bzw. durchgebohrten Akustikplatten auftritt, erzielbar ist.The embodiment shown in FIGS. 3 and 4 represents a further development of the invention, as the top layer 2 has longitudinally extending and up to the middle layer 3 slits 2a, which are aligned with the slits 1a, and the middle layer 3 on their Cover layer 2 facing side has further grooves 3b, which coincide with the slots 2a of the cover layer 2. The depths of the grooves 3a and 3b are dimensioned such that their sum exceeds the thickness of the central layer 3, so that openings 4 (shown hatched in FIG. 4) are present at the intersections of the grooves 3a and 3b, through which the sound also passes the acoustic panel can pass through, whereby an additional sound absorption effect, as occurs in the known slotted or drilled acoustic panels, can be achieved.

Wie bereits erwähnt, ist es nicht unbedingt erforderlich, daß die Nuten 3a der Mittellage 3 die Schlitzungen 1a der Decklage 1 unter einem rechten Winkel schneiden, wenn dies auch derzeit die bevorzugte Ausführungsform darstellt. Eine Schrägstellung der Nuten 3a gegenüber den Schlitzungen 1a könnte z.B. dazu dienen, in einer mit erfindungsgemäßen Akustikplatten zu verkleidenden Wand oder Decke dekorative Muster zu erzeugen.As already mentioned, it is not absolutely necessary for the grooves 3a of the central layer 3 to cut the slots 1a of the cover layer 1 at a right angle, although this is currently the preferred embodiment. An inclination of the grooves 3a with respect to the slots 1a could e.g. serve to produce decorative patterns in a wall or ceiling to be clad with acoustic panels according to the invention.

In den dargestellten Ausführungsformen sind die Schlitzungen 1a als über die gesamte Akustikplatte durchgehend dargestellt. Es wäre jedoch auch möglich, diese Schlitzungen an Stellen, wo keine Nuten 3a vorhanden sind, zu unterbrechen oder schon vor dem Plattenrand enden zu lassen. Auch damit ließe sich ein Dekoreffekt erzielen.In the illustrated embodiments, the slits 1a are as over the entire acoustic panel shown throughout. However, it would also be possible to interrupt these slits at locations where there are no grooves 3a or to let them end before the edge of the plate. A decorative effect could also be achieved with this.

Was schließlich die Ausbildung der Querschnitte der Schlitzungen 1a und Nuten 3a betrifft, so können diese Querschnitte anstelle der dargestellten Rechteckform auch jede andere geeignete Form besitzen. Insbesondere bieten sich hier auch gerundete, dreieckige, abgefaste oder karniesbogenartige Querschnitte an. Wie bereits ausgeführt, kann über die Querschnittsform der Schlitzungen 1a und Nuten 3a in einem gewissen Maß die Schallabsorptionswirkung der Akustikplatte beeinflußt werden. Daneben sind durch die diversen Querschnittsformen unterschiedliche dekorative Wirkungen zu erzielen.Finally, with regard to the formation of the cross sections of the slots 1a and grooves 3a, these cross sections can also have any other suitable shape instead of the rectangular shape shown. In particular, rounded, triangular, chamfered or caries-like cross-sections also lend themselves here. As already stated, the sound absorption effect of the acoustic panel can be influenced to a certain extent via the cross-sectional shape of the slots 1a and grooves 3a. In addition, various decorative effects can be achieved through the various cross-sectional shapes.

Zur Herstellung der erfindungsgemäßen Akustikplatte wird wie folgt vorgegangen.The procedure for producing the acoustic panel according to the invention is as follows.

Es werden zunächst in die für die Bildung der Mittellage 3 bestimmten Bretter einseitig die Nuten 3a gehobelt bzw. gefräst. Die so vorbereiteten Mittellagenbretter werden in den normalen Fertigungsprozeß für Dreischicht-Massivholzplatten eingebunden und mit den die beiden Decklagen 1 und 2 bildenden Brettern in der Presse zu einem Plattenrohling verleimt. Nach dem Entleeren der Presse sind die Nuten 3a der Mittellage durch die Decklage 1 abgedeckt. Der Plattenrohling wird sodann formatiert, d.h. zu einzelnen Platten der für die Akustikplatten vorgesehenen Größe geschnitten. Im Anschluß daran wird die Decklage 1 einer solchen Platte mit Hilfe von Hobel- bzw. Fräswerkzeugen im Durchlauf bis zur Mittellage 3 geschlitzt (Schlitzungen 1a), womit eine Akustikplatte nach Fig. 1 fertiggestellt ist.First, the grooves 3a are planed or milled on one side into the boards intended for the formation of the middle layer 3. The middle-layer boards prepared in this way are integrated into the normal production process for three-layer solid wood panels and glued to a board blank in the press with the boards forming the two top layers 1 and 2. After the press has been emptied, the grooves 3a of the middle layer are covered by the cover layer 1. The blank disc is then formatted, i.e. cut into individual panels of the size intended for the acoustic panels. Subsequently, the top layer 1 of such a board is slit in the run up to the middle layer 3 with the help of planing or milling tools (slits 1a), whereby an acoustic board according to FIG. 1 is completed.

Im Falle der Akustikplatte nach Fig. 2 wird mit Hilfe von Hobel- bzw. Fräswerkzeugen auch die Decklage 2, u. zw. bis in die Mittellage 3 hinein, geschlitzt, wodurch gleichzeitig die Schlitzungen 2a der Decklage 2 und die mit diesen Schlitzungen zusammenfallenden weiteren Nuten 3b der Mittellage 3 entstehen.In the case of the acoustic panel according to FIG. 2, the top layer 2, u. between. In the middle layer 3, slotted, whereby at the same time the slots 2a of the top layer 2 and the coincident with these slots 3b grooves of the middle layer 3 are formed.

Claims (5)

Akustikplatte aus Holzwerkstoff, dadurch gekennzeichnet, daß sie aus einer Dreischicht-Massivholzplatte mit zwei in bezug auf die Faserrichtung parallel zueinander verlaufenden Decklagen (1,2) und einer zu diesen querverlaufenden Mittellage (3) besteht, daß die eine (hallraumseitige) Decklage (1) in Längsrichtung verlaufende und bis zur Mittellage (3) reichende Schlitzungen (1a) aufweist, und daß die Mittellage (3) auf ihrer der geschlitzten Decklage (1) zugewandten Seite parallele, die Schlitzungen (1a) schneidende Nuten (3a) besitzt.Acoustic panel made of wood-based material, characterized in that it consists of a three-layer solid wood panel with two cover layers (1, 2) running parallel to one another with respect to the direction of the fibers and a central layer (3) running transversely to these, that the one (reverb side) cover layer (1 ) in the longitudinal direction and up to the middle layer (3) reaching slots (1a), and that the middle layer (3) on its side facing the slotted cover layer (1) has parallel grooves (3a) intersecting the slots (1a). Akustikplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Nuten (3a) der Mittellage (3) die Schlitzungen (1a) der einen Decklage (1) unter einem rechten Winkel schneiden.Acoustic panel according to claim 1, characterized in that the grooves (3a) of the central layer (3) cut the slits (1a) of one cover layer (1) at a right angle. Akustikplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schlitzungen (1a) und/oder die Nuten (3a) im Querschnitt rechteckig, gerundet, dreieckig, abgefast oder karniesbogenförmig ausgebildet sind.Acoustic panel according to claim 1 or 2, characterized in that the slits (1a) and / or the grooves (3a) are rectangular, rounded, triangular, chamfered or shaped like an arc of a cross-section. Akustikplatte nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß auch die andere Decklage (2) in Längsrichtung verlaufende und bis zur Mittellage (3) reichende Schlitzungen (2a) aufweist, die vorzugsweise mit den Schlitzungen (1a) der einen Decklage (1) fluchten, und die Mittellage (3) auf ihrer der anderen Decklage (2) zugewandten Seite parallele und mit den Schlitzungen (2a) der anderen Decklage (2) zusammenfallende Nuten (3b) besitzt, wobei die Summe der Tiefen der Nuten (3a,3b) auf den beiden Seiten der Mittellage (3) größer ist als die Dicke der Mittellage (Fig. 2).Acoustic panel according to one of Claims 1 to 3, characterized in that the other cover layer (2) also has slits (2a) which extend in the longitudinal direction and extend to the central layer (3), preferably with the slits (1a) of the one cover layer (1 ) and the middle layer (3) has on its side facing the other cover layer (2) parallel grooves (3b) coinciding with the slots (2a) of the other cover layer (2b), the sum of the depths of the grooves (3a, 3b) on both sides of the middle layer (3) is greater than the thickness of the middle layer (Fig. 2). Verfahren zur Herstellung einer Akustikplatte nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zunächst in für die Mittellage bestimmten Brettern einseitig parallele und vorzugsweise in Längsrichtung der Bretter verlaufende Nuten gehobelt bzw. gefräst werden, sodann die mit den Nuten versehenen Bretter mit die beiden Decklagen bildenden Brettern in der Presse zu einem Plattenrohling verleimt werden, danach der Plattenrohling zu Platten der für die fertige Akustikplatte vorgesehenen Größe geschnitten wird, und schließlich mit Hilfe von Hobel- bzw. Fräswerkzeugen in der den Nuten der Mittellage benachbarten einen (hallraumseitigen) Decklage einer solchen Platte in Längsrichtung verlaufende und bis zur Mittellage reichende Schlitzungen hergestellt werden, wobei gegebenenfalls auch in der anderen Decklage in Längsrichtung verlaufende und vorzugsweise mit den Schlitzungen der einen Decklage fluchtende Schlitzungen hergestellt werden, die bis in die Mittellage hineinreichen und damit gleichzeitig in der Mittellage mit den Schlitzungen dieser anderen Decklage zusammenfallende Nuten bilden.A process for the production of an acoustic panel according to one of claims 1 to 4, characterized in that grooves are first planed or milled in boards intended for the central position on one side and parallel and preferably running in the longitudinal direction of the boards, then the boards provided with the grooves with the two Boards that form the top layers are glued in the press to form a blank plate, then the blank plate is cut into panels of the size intended for the finished acoustic panel, and finally with the help of planing or milling tools in the top layer (one on the hall side) adjacent to the grooves in the middle layer such a plate in the longitudinal direction and extending to the middle position are produced, where appropriate also in the other top layer extending in the longitudinal direction and preferably aligned with the slots of the one top layer, the slits into the middle position rich and thus simultaneously form grooves coinciding in the middle position with the slits of this other cover layer.
EP95890167A 1995-06-02 1995-09-21 Acoustic panel as well as procedure for production of the same Expired - Lifetime EP0745738B1 (en)

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AT945/95 1995-06-02
AT0094595A AT405069B (en) 1995-06-02 1995-06-02 ACOUSTIC PANEL AND METHOD FOR PRODUCING THE SAME

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EP0745738B1 EP0745738B1 (en) 1999-04-14

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992636A3 (en) * 1998-10-06 2001-06-06 Lignoform Benken AG Sound insulating panel for interior decoration
EP1109150A3 (en) * 1999-12-17 2001-09-05 ISOLITH Leichtbauplattenwerk M. Hattinger Gesellschaft mbH Acoustic panel
WO2002043047A1 (en) * 2000-11-21 2002-05-30 Thomas Wiegel Layered material
EP1357237A3 (en) * 2002-04-22 2004-01-28 Pream S.R.L. Sound absorbent panel and related manufacturing method
DE10248072A1 (en) * 2002-10-15 2004-05-13 Waldemar Staudigel Sound-absorbing panel
EP1380699A3 (en) * 2002-07-10 2004-11-17 Tavapan SA Sound absorbing panel
EP1612343A2 (en) * 2004-07-01 2006-01-04 Lignotrend AG Wooden panel
ES2304085A1 (en) * 2006-05-04 2008-09-01 Grupo Sansano Valero, S.L. Procedure for obtaining a wooden coating in acoustic panels, and panel obtained with such coating. (Machine-translation by Google Translate, not legally binding)
EP2039841A1 (en) 2007-09-20 2009-03-25 VS Vereinigte Spezialmöbelfabriken GmbH & Co. KG Cupboard or shelf furniture
ITMI20120343A1 (en) * 2012-03-06 2013-09-07 Radaelli Angelo S A S Di Renata Va Gni Radaelli & SOUND-ABSORBING PANEL STRUCTURE.

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AT285130B (en) * 1966-11-28 1970-10-12 Francais Isolants Plate for sound absorption and vibration isolation
EP0150500A2 (en) * 1984-01-17 1985-08-07 Karl Danzer KG Acoustical panel of agglomerated wood particles provided with tubular cavities
EP0361025A1 (en) * 1988-09-16 1990-04-04 AG Hunziker & Cie. Noise barrier device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT285130B (en) * 1966-11-28 1970-10-12 Francais Isolants Plate for sound absorption and vibration isolation
EP0150500A2 (en) * 1984-01-17 1985-08-07 Karl Danzer KG Acoustical panel of agglomerated wood particles provided with tubular cavities
EP0361025A1 (en) * 1988-09-16 1990-04-04 AG Hunziker & Cie. Noise barrier device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0992636A3 (en) * 1998-10-06 2001-06-06 Lignoform Benken AG Sound insulating panel for interior decoration
EP1109150A3 (en) * 1999-12-17 2001-09-05 ISOLITH Leichtbauplattenwerk M. Hattinger Gesellschaft mbH Acoustic panel
WO2002043047A1 (en) * 2000-11-21 2002-05-30 Thomas Wiegel Layered material
EP1357237A3 (en) * 2002-04-22 2004-01-28 Pream S.R.L. Sound absorbent panel and related manufacturing method
EP1380699A3 (en) * 2002-07-10 2004-11-17 Tavapan SA Sound absorbing panel
DE10248072B4 (en) * 2002-10-15 2006-08-24 Waldemar Staudigel Sound-absorbing panel
DE10248072A1 (en) * 2002-10-15 2004-05-13 Waldemar Staudigel Sound-absorbing panel
EP1612343A2 (en) * 2004-07-01 2006-01-04 Lignotrend AG Wooden panel
EP1612343A3 (en) * 2004-07-01 2007-03-07 Lignotrend AG Wooden panel
ES2304085A1 (en) * 2006-05-04 2008-09-01 Grupo Sansano Valero, S.L. Procedure for obtaining a wooden coating in acoustic panels, and panel obtained with such coating. (Machine-translation by Google Translate, not legally binding)
EP2039841A1 (en) 2007-09-20 2009-03-25 VS Vereinigte Spezialmöbelfabriken GmbH & Co. KG Cupboard or shelf furniture
DE102007044875A1 (en) 2007-09-20 2009-04-02 VS Vereinigte Spezialmöbelfabriken GmbH & Co. KG Plate-shaped component
ITMI20120343A1 (en) * 2012-03-06 2013-09-07 Radaelli Angelo S A S Di Renata Va Gni Radaelli & SOUND-ABSORBING PANEL STRUCTURE.

Also Published As

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DE59505656D1 (en) 1999-05-20
ATA94595A (en) 1998-09-15
ATE178964T1 (en) 1999-04-15
AT405069B (en) 1999-05-25
EP0745738B1 (en) 1999-04-14

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