CH719045A2 - Sound absorbing acoustic element and sound absorber. - Google Patents

Abstract

The invention relates to a sound-absorbing acoustic element (1) which has a front (2) and a rear, with three, four or six narrow sides (4) being arranged between the front (2) and the rear. Dabe (5), the acoustic element (1) on the front (2) and on the narrow sides (4) is provided with a decor (5). The decoration (5) is formed from a printed impregnated paper or from a printed plastic film or from a veneer. The invention also relates to a sound absorber with at least two such acoustic elements (1).

Description

The invention relates to a sound-absorbing acoustic element according to the preamble of claim 1 and a sound absorber, which is composed of several acoustic elements.

According to the state of the art, acoustic wall or ceiling constructions are supplied as individual panels which, in combination with absorbers and mounting systems, are put together to form a system.

There are also known finished components in the form of baffles or acoustically effective images that are hung on the wall or under the ceiling.

On the Internet at the address https://www.romakowski.com/de/daemmsvsteme/produkte/wandpaneele/mwakustikpaneel-typ-afp an acoustic panel with an insulating core made of mineral wool and a perforated sheet steel on the front is disclosed. On two opposite narrow sides, it has a device for connecting to the adjacent acoustic panel. More precisely, two mutually parallel springs are provided on one narrow side, and two mutually parallel grooves are correspondingly provided on the opposite narrow side.

At the edge of a planar combination of such acoustic elements and in particular when such an acoustic element is to be used as a single baffle, the narrow sides of the acoustic elements or of the acoustic element are visible, the visual appearance of which is suboptimal.

DE 10 2014 213 785 A1 discloses a cuboid acoustic element that is covered not only on its large outer side or main surface, but also on its four narrow sides with a decorative material made of fabric or fabric.

Accordingly, the invention is based on the object of creating a sound-absorbing acoustic element and a sound absorber in which the visual appearance of the narrow sides is optimal. The aim is to improve the possibilities for cleaning the decor. In particular, it should be possible to wipe off dirt (preferably also with a damp cloth) or else to wipe off special whiteboard colors (lettering, painting).

[0008] This object is achieved by an acoustic element having the features of patent claim 1 and by a sound absorber having the features of patent claim 16.

[0009] Further advantageous refinements of the invention are described in the dependent patent claims.

The claimed sound-absorbing acoustic element has a front and a—preferably approximately parallel—back, wherein at least three, four or six narrow sides are arranged between the front and the back, resulting in a triangular, quadrangular or hexagonal acoustic element. According to the invention, the acoustic element is provided with a decoration on the front and on the narrow sides, while no visual demands are made on the rear. This creates an acoustic element whose visual appeal is improved when the front side and exposed narrow sides are viewed. The term ¿narrow side¿ is to be understood as meaning the peripheral side surfaces, for example in the case of an acoustic element with large rectangular surfaces (front / back), the two lateral longitudinal surfaces and the shorter end surfaces connecting them. According to the invention, the decor is formed from a printed impregnated paper (CPL, HPL) or a printed plastic film (PE, PP, PET, PUR, PVC) or a wood veneer.

Alternatively or in addition to the decoration, the front side can also be designed (e.g. coated) in such a way that it can be used as a projection surface (e.g. for a beamer). For this purpose, the decor is preferably monochromatic and flat.

The decor of the front and the narrow sides is preferably the same, then a one-piece flat stretchable material - in particular a sound-permeable film - are used.

In particular, if the acoustic element is to be used without connection to other acoustic elements, it can be designed as a picture or as a baffle.

[0014] If, on the other hand, the acoustic element is used in a modular manner in conjunction with other acoustic elements and is to be developed into a (so-called) sound absorber, the mechanical and static demands are higher. For this purpose, the acoustic element can have a stiffening frame that is covered with the stretchable material on its front side and on the narrow sides. An insulating core or a sound-absorbing material is used in the frame. This can be open-cell foam or PET or fleece or felt. Wood fiber boards or wood wool boards are also possible.

The frame can be covered on the front and / or back with a plate, which are designed to be sound-permeable at least on one side. The non-decorative back can also be covered with a film or a textile.

In acoustic elements not belonging to the invention, the decor can be produced directly on the surface of the plate by printing and painting. The surface of the board can also be designed with easy-to-clean properties, so that it can be used as a whiteboard.

In a preferred embodiment of the acoustic element according to the invention its decor is designed with easy-to-clean properties, so that it can be used as a whiteboard.

Magnetic properties for attaching magnet holders, for example, can also be implemented here.

If the insulating core has sufficient inherent strength, the frame can be dispensed with. The insulating core can then be covered on the front with a stiffening panel or covered directly with the decor. For example, an edge banding is attached as a decoration, which encloses the insulating core on the narrow sides.

Preferably, the panel consists of a wood material or gypsum or other mineral materials or plastic or metal.

In the case of acoustic elements not belonging to the invention, the decoration is made of carpet or non-woven fabric.

In the further development of the acoustic element according to the invention with the panel, the panel and the decoration are preferably perforated, e.g. needled, punched or slotted, in order to optimize the sound absorption.

If the acoustic element is to be used modularly with other acoustic elements that are basically similar or structurally identical and to be developed into the sound absorber, it is particularly preferred if the acoustic elements can be attached directly to one another.

[0024] It is also possible for non-sound-absorbing or reverberant elements to be integrated in the sound absorber. In principle, these further elements are designed in the same way as the acoustic elements with regard to their shape (in particular the number of narrow sides) and their fastening options. This results in free combination options for acoustic elements and other elements in the sound absorber.

So that the acoustic elements can be fastened directly to one another, a narrow-sided fastening device can be provided on the narrow sides, with which the respective narrow side can be fastened to a narrow side of the further acoustic element, or with which the rear side can be in contact with a rear side of the further acoustic element is durable. The narrow side fastener is preferably a groove. This preferably runs around the acoustic element over all of the narrow sides.

For the second case, a U-shaped connecting element can be provided, the two legs of which can be inserted into the respective groove, so that the rear side can be held in contact with the rear side of the further acoustic element. The acoustic element can thus be doubled, so to speak, with the two rear sides lying against one another and therefore being covered.

In the first case, an external spring - e.g. a connecting pin - can be provided, the two end sections of which can be inserted into the respective groove, whereby the narrow side is fastened to the narrow side of the further acoustic element. This allows a wall covering to be created from the acoustic elements, e.g. in a cross bond or in an English bond.

In a very flexibly usable development of the acoustic element according to the invention, the rear has a rear fastening device with which the rear can be fastened to a rear and/or to a narrow side of another acoustic element. In the first case, the acoustic element can be doubled, so to speak, with the two rear sides being covered. In the second case, a right-angled arrangement of two acoustic elements is possible.

In an embodiment that is simple in terms of device technology and assembly technology, the rear fastening device is a - preferably circular-cylindrical - recess which, by means of a - preferably circular-cylindrical - connecting pin on a corresponding - preferably circular-cylindrical - recess on the rear side of the further acoustic element or on a groove on the narrow side of the further Acoustic element can be attached.

In a particularly flexible development of the acoustic element according to the invention, the front and the back are rectangular (in the special case, square), so that the acoustic element is cuboid. Then not only can flat wall coverings be produced in different associations, but also the expansive or cubic assembly is particularly flexible and simple.

The acoustic element can also be curved or curved. Then the front and the back are curved or bent accordingly. In the case of the acoustic element with four narrow sides, two opposite narrow sides are straight and the other two narrow sides are curved or curved.

[0032] Light elements can also be integrated into the acoustic element. In particular, light-transmitting elements are preferably integrated into the decor and the panel (e.g. lenses made of glass or plastic), and lighting means (e.g. LEDs) are arranged inside the acoustic element.

The sound absorber according to the invention has at least two described acoustic elements.

In a first embodiment, the sound absorber is designed as a wall covering with a plurality of acoustic elements which are fastened to one another with their narrow sides via their narrow-side fastening devices.

In a second embodiment, the sound absorber is designed as a free-standing wall with a plurality of acoustic elements, which are attached to one another in pairs with their rear sides via their rear fastening devices.

The acoustic elements are preferably arranged in such a way that acoustic decoupling between two rooms is made possible, with which room and building acoustic insulation/damping is made possible. Conventional constructions are mechanically fixed in the intermediate wall. This leads to sound bridges between the partitioned rooms.

In the second configuration as a free-standing wall, an upper wall section can be angled relative to a lower wall section. The top wall section can be inclined or horizontal. The top wall section can be segmented.

In the second configuration as a free-standing wall, two upper wall sections can be angled relative to a lower wall section. The two upper wall sections can be horizontal. The top wall sections can be segmented.

The top wall sections may be pivoted to the bottom wall sections. After the free-standing wall has been erected, its acoustic properties can be optimized and/or the height can be adjusted.

In the second configuration as a free-standing wall, the above-mentioned bent or curved acoustic elements can be connected to one another in such a way that two curved, preferably approximately identical, wall sections are produced. Each wall section has a concave curved face composed of the decor-bearing faces of the acoustic elements. Each wall section also has a convexly curved backside composed of the backsides of the acoustic elements. The two wall sections are fastened to one another with their convexly curved rear sides. This eliminates the need for feet on the free-standing wall.

In the second embodiment as a free-standing wall, vertical structural elements can be provided which can serve as shelves. As a result, the free-standing wall can also be used as a shelf or shelf.

The free standing walls can be sized and light weight to be mobile. For example, preferred configurations can be moved by two people.

In a third embodiment, the sound absorber is designed as a cuboid (in the special case cube-shaped) cube with at least four acoustic elements, the backs of which point inwards. Two acoustic elements are fastened to the narrow-side fastening devices of the other two acoustic elements with their respective rear fastening devices and can thus form a peripheral wall of the cube.

The cube can be closed, for which purpose a fifth acoustic element is provided as a cover, the back of which points downwards.

According to a first variant, the fifth acoustic element is fastened with its four narrow-side fastening devices to respective rear fastening devices of the first four acoustic elements. Alternatively, the back of the fifth acoustic element can rest on the narrow sides of the other four acoustic elements. Then the fifth acoustic element is fastened with its rear fastening devices to the upper narrow-side fastening devices of the four other acoustic elements.

An embodiment of the acoustic element according to the invention and several embodiments of the sound absorber according to the invention are shown in the figures.

1 shows the exemplary embodiment of the acoustic element according to the invention in a perspective front view, FIG. 2 shows the acoustic element from FIG of a sound absorber according to the invention, Figures 5a and 5b, two acoustic elements fastened to one another according to Figures 1 and 2, Figure 6 a further exemplary embodiment of a sound absorber according to the invention with four acoustic elements which are fastened to one another according to Figures 5, in a perspective view, Figure 7 a further exemplary embodiment of a sound absorber according to the invention with five acoustic elements fastened to one another in a perspective view, Figure 8 a further exemplary embodiment of a sound absorber according to the invention with twelve acoustic elements fastened to one another in a perspective view, Figure 9 two acoustic elements fastened to one another, Figure 10 the exemplary embodiment of the acoustic element according to the invention from Figures 1 and 2 in a schematic sectional representation; and FIGS. 11 to 17 each show sound absorbers designed as free-standing walls.

1 shows a cuboid embodiment of the acoustic element 1 according to the invention in a perspective view of its front side 2. The acoustic element 1 has four narrow sides 4, of which only two narrow sides 4 can be seen in FIG. The front 2 and the four narrow sides 4 are provided with a uniform 5 decor.

A fastening device in the form of a groove 6 which extends along the narrow side 4 is introduced on each narrow side 4 . So that the groove 6 is circumferential.

FIG. 2 shows the acoustic element 1 from FIG. 1 in a perspective view of its rear side 8. It can be seen that the decoration 5 extends around the edges of the rear side 8. The largest part of the back 8 is covered with a textile 10 to which no particular optical requirement is made.

In each corner area of the back 8, another fastening device is provided in the form of a circular-cylindrical recess 12, which can be designed as a blind hole.

Figures 3a and 3b show the attachment of two acoustic elements 1 by means of their grooves 6 according to sectional representations. In the two grooves 6 a connecting external spring 14 is used.

Figure 4 shows a first variant above and a second variant below as a wall covering 15; 115-trained sound absorber with acoustic elements 1 according to Figures 1 and 2. These can be attached to one another with the grooves 6 and the external tongue 14 according to Figures 3 and/or with adhesive on their narrow sides 4. An English bond is realized in the upper area, while a cross bond is realized in the lower area.

Figures 5a and 5b show two at right angles attached to each other acoustic elements 1 according to Figures 1 and 2 in two different views. It is fastened by means of the groove 6 of the acoustic element 1 (on the left in FIG. 5b) and the recess 12 of the acoustic element 1 (on the right in FIG. 5b), into which a connecting pin 16 is inserted.

FIG. 6 shows a further exemplary embodiment of a sound absorber according to the invention in a perspective view. It is formed from four acoustic elements 1 fastened to one another, which are fastened to one another with the grooves 6 and recesses 12 and connecting pins 16 shown in FIG. 5 and/or with adhesive. A cube 22 is produced in this way, the four walls of which are formed with a respective acoustic element 1 .

FIG. 7 shows a cube 24 with five acoustic elements 1 fastened to one another. The structure corresponds to that from FIG. 6, and a fifth acoustic element 1 is additionally used as a cover. The fifth acoustic element 1 is fastened with its four narrow-sided grooves 6 to the respective rear recesses 12 of the four first-mentioned acoustic elements 1 .

FIG. 8 shows a further exemplary embodiment of a sound absorber according to the invention, which is designed as a free-standing wall 30 . The wall 30 is composed of a grid of pairs of acoustic elements 1 fastened to one another with their rear sides. In the exemplary embodiment shown, the grid is formed from six pairs of acoustic elements 1 .

The wall 30 can be placed in a passage connecting two rooms. The acoustic elements 1 are arranged in such a way that acoustic decoupling between the two rooms is made possible.

The two acoustic elements 1 of each pair are attached to one another via their rear recesses 12 and via connecting pins 16 (both shown in FIG. 5b). The six pairs of acoustic elements 1 are in turn fastened to one another via their narrow-sided grooves 6, only exposed and therefore unused grooves 6 being visible in FIG. Furthermore, feet 18 are provided.

In a variant of the sound absorber shown, which is designed as a free-standing wall, the acoustic elements have respective panels on their front sides, which are designed with easy-to-clean properties, so that they can be used as a whiteboard. Furthermore, the plates have magnetic properties for attachment z. B. of magnetic holders.

FIG. 9 shows a sectional representation of a pair of acoustic elements 1 fastened to one another. The backs 8 are held in contact with each other. In the exemplary embodiment shown, this takes place with the narrow-sided grooves 6, into which a respective leg of a U-shaped connecting element 20 is inserted in pairs. The attachment can be reinforced with the rear recesses 12 in which the connecting pins 16 are inserted.

FIG. 10 shows a section of the acoustic element 1 from FIG. 1 and without the end faces 2 in a schematic sectional exploded view. It can be seen that the decoration 5 arranged on the front side 2 is carried by a plate 28 . An insulating core 26 is arranged on the underside of the plate 28 . The decoration 5 is formed from printed impregnated paper or from a printed plastic film or from a veneer. The plate 28 is made of a wood material or gypsum or other mineral materials or plastic or metal. To optimize the sound absorption, the plate 28 and the decoration 5 are perforated, e.g. needled, punched or slotted.

FIG. 11 shows a sound absorber which is composed of acoustic elements 1 according to FIGS. 1, 2 and 10 and which is designed as a free-standing wall 130 . An upper inclined wall section 130b is fastened to a lower vertical wall section 130a via a joint 130c.

Two transverse feet 118 are arranged under the wall 130.

FIG. 12 shows the free-standing wall 130 from FIG. 12 in a side view. Via the joint 130c, the inclination of the upper inclined wall section 130b and thus the overall height and the soundproofing behavior of the wall 130 can be adjusted.

The two feet 118, of which only one foot 118 can be seen in FIG. 12, protrude comparatively far under the wall 130 on both sides in order to ensure that the wall 130 stands securely even with a sharply angled upper wall section 130b.

FIG. 13 shows a sound absorber composed of acoustic elements 1 according to FIGS. 1, 2 and 10 to form a free-standing wall 230 . The lower vertical wall section 130a, the joint 130c and the feet 118 correspond to those of the exemplary embodiment from FIGS the sound insulation is optimal when sitting.

FIG. 14 shows a sound absorber which is composed of acoustic elements 1 according to FIGS. 1, 2 and 10 and which is designed as a free-standing wall 330 . Two upper wall sections 130b are provided, both of which are articulated opposite the lower wall section 130a via a respective hinge 130c on the lower vertical wall section 130a. Either or both of the top wall sections 130b may be segmented.

FIG. 15 shows a sound absorber which is composed of acoustic elements 1 according to FIG. 10 and which is designed as a free-standing wall 430 . two upper wall sections 430b are angled at right angles to the lower wall section 130a. Thus the two upper wall sections are horizontal 430b. Either or both of the top wall sections 430b may be segmented.

FIG. 16 shows a sound absorber which is composed of individual bent or curved acoustic elements and which is designed as a free-standing wall 530 . For this purpose, the acoustic elements are connected to one another in such a way that two curved, approximately identical wall sections 530d are formed. Each wall section 530d has a concavely curved side composed of the decor-bearing faces of the acoustic elements. Each wall section 530d further has a convexly curved back surface composed of the back surfaces of the acoustic elements. The two wall sections 530d are attached to one another with their convexly curved rear sides. More precisely, the acoustic elements of a middle horizontal row of one wall section 530d are connected in pairs to acoustic elements of a middle horizontal row of acoustic elements of the other wall section 530d. No feet are needed with this freestanding wall 530.

FIG. 17 shows a sound absorber designed as a free-standing wall 630 . The wall 630 has a vertical wall section 130a formed from acoustic elements 1 according to FIG. 10, to which horizontal structural elements 630e are fastened, which serve as shelves. As a result, the free-standing wall 630 can also be used as a shelf. The horizontal structural elements 630e are formed from non-sound absorbing or reverberant elements.

Both feet 118, of which only one foot 118 is shown in Figure 17, protrude comparatively far, in particular under the horizontal structural elements 630e (to the right in Figure 17), in order to ensure that the wall 630 is stable even when structural elements 630e are loaded guarantee.

A sound-absorbing acoustic element 1 is disclosed, which has a front side 2 and a rear side 8--preferably approximately parallel thereto--with several narrow sides 4--preferably four--being arranged between the front and the rear side. The acoustic element 1 is provided with a decoration 5 - e.g. a sound-permeable foil - on the front side 2 and on the narrow sides 4, while no visual requirements are placed on the rear side 8. The decor 5 of the front side 2 and the narrow sides 4 is preferably the same, then a one-piece, flat, stretchable material can be used uniformly.

Reference List

1 acoustic element 2 front side 4 narrow side 5 decor 6 groove 8 back side 10 textile 12 recess 14 external tongue 15; 115 wall covering 16 connecting pin 18; 118 base 20 U-shaped connecting element 22 Cube 24 Cube 26 insulation core 28 plate 30; 130; 230; 330; 430; 530; 630 free-standing wall 130a lower vertical wall portion 130b; 430b top wall section 130c hinge 530d curved or curved wall section 630e horizontal structural member

Claims (20)

1. Sound-absorbing acoustic element with a front (2) and a back (8), between which at least three, four or six narrow sides (4) are arranged, the front (2) and the narrow sides (4) having a decoration (5) are provided, characterized in that the decoration (5) is formed from impregnated paper or from a printed plastic film or from a veneer. 2. Acoustic element according to claim 1 with a frame which is covered with the decoration (5) on its front side (2) and on the narrow sides (4). 3. Acoustic element according to one of the preceding claims, with an insulating core (26) which has a plate (28) on its front side to which the decoration (5) is attached. 4. Acoustic element according to claim 3, wherein the plate (28) is made of a wood material or plaster or other mineral materials or plastic or metal. 5. Acoustic element according to one of claims 3 to 4, wherein the plate (28) and the decoration (5) are perforated. 6. Acoustic element according to one of the preceding claims, wherein a narrow-side fastening device is provided on each of the narrow sides (4), with which the respective narrow side (4) can be fastened to a narrow side of a preferably structurally identical further acoustic element, or with which the rear side (8) can be held in place on a rear side of the further acoustic element. 7. Acoustic element according to claim 6, wherein the narrow-side fastening device is a groove (6). 8. Acoustic element according to claim 7 with a U-shaped connecting element (20), the two legs of which can be inserted into the respective groove (6), whereby the back (8) can be held in contact with the back of the further acoustic element. 9. Acoustic element according to claim 7 with an external spring (14), the two end sections of which can be inserted into the respective groove (6), whereby the narrow side (4) can be fastened to the narrow side of the further acoustic element. 10. Acoustic element according to one of the preceding claims, wherein the rear (8) has a rear fastening device with which the rear (8) can be fastened to a rear or to a narrow side of another acoustic element. 11. Acoustic element according to claim 11, wherein the rear fastening device is a recess (12) which can be fastened to a corresponding recess in the rear of the further acoustic element or to a groove in the narrow side of the further acoustic element by means of a connecting pin (16). 12. Acoustic element according to one of the preceding claims, wherein the front (2) and the back (8) are rectangular, whereby the acoustic element is cuboid. 13. Acoustic element according to one of claims 1 to 11, which is curved or bent. 14. Acoustic element according to one of the preceding claims, in which at least one light element is integrated. 15. Acoustic element according to one of the preceding claims, wherein this layer or a layer forming the decoration (5) or a plate (28) carrying the decoration (5) is designed with magnetic properties. 16. Sound absorber with at least two acoustic elements (1) according to any one of the preceding claims. 17. Sound absorber according to claim 16, which is designed as a wall covering (15; 115) with a plurality of acoustic elements (1) which are fastened to one another with their narrow sides (4) via their narrow-side fastening devices. 18. Sound absorber according to claim 16, which is designed as a free-standing wall (30; 130; 230; 330; 430; 530; 630) with a plurality of acoustic elements (1), of which at least a subset is connected in pairs with their rear sides (8) over their rear Fastening devices are attached to each other. 19. Sound absorber according to claim 18, wherein the composite acoustic elements (1) have decoupling properties. 20. The sound absorber according to claim 16, which is designed as a cuboid cube (22; 24) with at least four acoustic elements (1), the rear sides (8) of which point inwards, with two acoustic elements (1) with their respective rear fastening devices on the narrow-side fastening devices of the other two acoustic elements (1) are attached.