Acoustic panel

Abstract

The invention is directed to an acoustic panel comprising at least two sound absorbing elements forming an abutment line, wherein a support element is arranged on at least a part of the abutment line.

Description

[0001] P7579PC00

[0002] 1

[0003] Acoustic panel

[0004] Disclosed herein is an acoustic panel comprising a support element, which provides stability to the acoustic panel.

[0005] Background

[0006] The indoor climate is affected by many different factors. One such factor is for example the sound or acoustics of a room. Depending on the function of the room different acoustic properties are desired and being able to control how sound travel is key in providing an optimal acoustic experience in a room.

[0007] Furthermore, another factor in the indoor climate is the visual aspects of a room. Thus, when implementing products that control the acoustics of the room it is also important that those products fit in visually.

[0008] One such acoustic product are acoustics panels that are formed of a frame that can be hung on the wall. A sound absorbing arrangement may then be arranged within the frame. A canvas or cover sheet can be arranged over the sound absorbing arrangement. The canvas can have a uniform color, a pattern, or a print such as a photo on it depending on the visual appearance that is desired.

[0009] Such known solutions are well suited for smaller and medium sized acoustic panels.

[0010] For larger acoustic panels stability issues may arise since the weight of the construction may cause deformation of the frame. This can for example be prevented by properly fixing the frame to the wall. However, if fixing the frame to the wall is not desired, e.g. because the wall is not suited or the frame is hanging from a ceiling, other ways of stabilising a large acoustic panel is needed.

[0011] Furthermore, larger acoustic panels are typically formed of multiple sound absorbing elements, which are arranged against each other within the frame. The elements may particularly in larger arrangement be slightly misaligned. Also, the line created where two sound absorbing elements abut, or are close to each other and have gaps, may be visible. Thus, there also is a need to reduce such misalignment and undesirably visual features.P7579PC00

[0012] 2

[0013] Even further, the sound absorbing element may shift around slightly and thus move away from each other which creates gaps between neighbouring sound absorbing elements. Thus, in order to reduce the risk of such gaps there exists a need to reduce the risk that the sound absorbing elements move away from each other.

[0014] Summary

[0015] In a first aspect there is disclosed an acoustic panel. The acoustic panel comprises a frame defining an opening. The opening can be described comprising an opening width w0, an opening height h0and an opening thickness t0. A sound absorbing arrangement is arranged in the opening of the frame.

[0016] The sound absorbing arrangement comprises at least a first sound absorbing element and a second sound absorbing element. The elements are arranged next to each other and as they abut against each other an abutment line is formed. Such an abutment line should be understood broadly, i.e. it can be considered an abutment zone or an interface area where the sound absorbing arrangement changes from the first sound absorbing element to the second sound absorbing element. As will be understood herein elements or gaps may be arranged between the first and second sound absorbing element and thus the abutment line may comprise such element or gaps for such embodiments.

[0017] In cases where it is desired that the sound absorbing arrangement is perceived as a unitary element, such an abutment line may be visually undesired even though the acoustic properties perform as desired. Furthermore, offset in the thickness directions, e.g. where the two sound absorbing elements are not flush with each other, may even further enhance the visibility of the abutment line as shadows may occur. Thus, in order to mitigate such issues, the acoustic panel further comprises a support element, wherein the support element comprises a cover flange. The cover flange is arranged on at least a part of the abutment line. The cover flange covers at least a part of the abutment line and at least a part of the first sound absorbing element and at least a part of the second sound absorbing element next to the at least part of the abutment line.

[0018] The support element also stabilises the construction of the acoustic panel. In particular where larger acoustic panels are constructed and the sound absorbing arrangement comprises multiple sound absorbing element as discussed herein there is a risk that the frame deforms and / or the sound absorbing arrangement shifts or even falls out. TheP7579PC00

[0019] 3

[0020] support element ensures that a stable and secure construction of the acoustic panel may be provided which holds the elements together and in place.

[0021] In one embodiment the sound absorbing arrangement comprises an arrangement width and an arrangement height corresponding to the dimensions across the sound absorbing arrangement. The arrangement width and height may correspond to, or be slightly lower, than the opening width w0and height h0. An arrangement thickness can also be defined, which extend transverse to the arrangement width and the arrangement height. The arrangement thickness will typically be smaller than the opening thickness t0such that the sound absorbing arrangement is fully received in the frame and do not protrude out therefrom.

[0022] In one embodiment the sound absorbing element, such as the first and / or the second sound absorbing element, comprises a first major face and a second major face which face in opposite directions.

[0023] The sound absorbing element can for example be understood as a three-dimensional geometrical shape, where two major opposite surfaces define the first and second major faces. The first and the second major faces are connected by side faces. The width and the height of the major faces define the width and height of the sound absorbing element and when multiple sound absorbing elements are arranged next to teach other to provide a sound absorbing arrangement, the accumulated widths and heights of the sound absorbing elements form the arrangement width and the arrangement height of the sound absorbing arrangement.

[0024] The thickness of the sound absorbing element, i.e. the distance between the two major faces, corresponds to the thickness of the sound absorbing arrangement.

[0025] When arranged on a wall the acoustic panel can be considered to have an outer surface which faces out into the room and an inner surface facing towards the wall. Thus, the sound absorbing arrangement and the sound absorbing elements forming the arrangement can also be considered to have outer and inner surfaces. For example, in one embodiment, a sound absorbing element can be arranged in the frame such that the first major face of the sound absorbing element forms an outer face which faces toward the room, and accordingly the second major face forms an inner face which faces towards the wall when the acoustic panel is arranged on a wall.P7579PC00

[0026] 4

[0027] In one embodiment the cover flange is arranged on the outer faces of the first and the second sound absorbing elements, such that the abutment line which could be seen by a viewer is covered by the cover flange. In such an embodiment an outer surface of the cover flange becomes visible.

[0028] The acoustic panel as disclosed herein is especially suited for use with sound absorbing elements which are formed of a mineral wool, such as glass wool or stone wool. Mineral wool materials are generally relative compressible which may result that the sound absorbing elements fall out of commonly known acoustic panels due to the compressible nature of the mineral wool, where sound absorbing elements formed of more rigid materials such as foam, wood or cement based materials typically will stay in the frame due to their stability and / or frictional fit characteristics. Such sound absorbing element formed of stone wool may for example in one embodiment comprise a density between 40 - 200 kg / m3, such as 80 - 150 kg / m3, for example 90 kg / m3.

[0029] The sound absorbing elements can for example be formed by a process comprising collecting mineral fibres and binder entrained in air on a travelling collector to form a web, curing the binder to form a bonded sound absorbing element having a density of 40 to 200 kg / m3 (which may also be referred to as a sound absorbing element), cutting the bonded sound absorbing element in a plane parallel to the bonded sound absorbing element, smoothing the cut surface by abrasion, and applying the facing or fabric to the cut and abraded surface of the bonded sound absorbing element. This result in sound absorbing elements of moderate density and having good acoustic properties (for instance aw of at least 0.8 or 0.85 and preferably above 0.9 or 0.95), good mechanical properties (in particular edge strength) and having a flat front face.

[0030] A sound absorbing element formed of stone wool can for example be produced using a known melting technique such as a cupola or an electrical melter. The melt may then be processed using a known spinning technique such as a cup or cascade spinner.

[0031] The sound absorbing element may for example comprise fibers with a diameter of 2 - 9 pm, for example between 3 -6 pm.

[0032] The sound absorbing element may further comprise an LOI (loss of ignition) between 2 -8%, for example between 3 - 5%.P7579PC00

[0033] 5

[0034] Mineral wool, and in particular stone wool, also provides good fire reaction properties to the acoustic panel and thus provide an acoustic panel which reduces the speed of the spread of fire. Typically, such acoustic panels using stone wool are classified as A1 or A2 / s1 , dO according to standard EN13501.

[0035] In a second aspect there is disclosed a method for providing an acoustic panel, for example an acoustic panel as described above in the relation to the first aspect. The method facilitates the production of the acoustic panel, and in particular facilitates this in an embodiment where the sound absorbing arrangement and the support element may be front mounted. Such front mounting allows for larger acoustic panels to be mounted on site on walls since no additional wall space is needed as for example when side mounting sound absorbing arrangement into a partially assembled frame.

[0036] The method may in one embodiment comprise the steps of:

[0037] - Providing a frame defining an opening. The frame opening may comprise an opening width w0, an opening height h0and an opening thickness t0.

[0038] - Arranging a sound absorbing arrangement in the opening of the frame. The sound absorbing arrangement comprises at least a first sound absorbing element and a second sound absorbing element arranged next to each other forming an abutment line.

[0039] - Arranging a support element comprising a cover flange in the acoustic panel. The cover flange is arranged on at least a part of the abutment line such that the cover flange covers the at least part of the abutment line and at least a part of the first sound absorbing element and at least a part of the second sound absorbing element next to the at least part of the abutment line.

[0040] The method may further facilitate the production of an acoustic panel as discussed herein. For example, in a further embodiment the method for providing an acoustic panel may comprise performing the following steps in sequence:

[0041] (i) Arranging the first sound absorbing element in the opening of the frame.

[0042] (ii) Arranging the support element in the opening of the frame.

[0043] (iii) Arranging the second sound absorbing element in the opening of the frame.

[0044] In a third aspect there is disclosed an array of acoustic panels comprising at least two acoustic panels which are arranged on a vertical surface such as a wall. This allows forP7579PC00

[0045] 6

[0046] different patterns and visual designs to be provided, for example in a puzzle like arrangement. The acoustic panels may for example be provided as discussed herein.

[0047] In a fourth aspect there is disclosed a support element for use in an acoustic panel, for example as discussed herein. The support element extends from a first end of the support element to a second end of the support element. The support element further comprises a cross section which is uniform along the extent of the support element.

[0048] A cover flange extends between the first and the second ends of the support element. A support flange extends perpendicular from the cover flange.

[0049] In one embodiment the support flange extends from the middle of the cover flange.

[0050] The support element may further comprise the features and elements of different embodiments as discussed herein, for example in relation to the acoustic panel.

[0051] In a fifth aspect there is disclosed a method of mounting an acoustic panel. The method comprises mounting the frame vertically on a wall and fix the frame with fasteners such as screws. The sound absorbing arrangement and the support element is inserted into the frame by pushing it into the opening of the frame.

[0052] In one embodiment a cover sheet may be arranged over the frame such that it covers the sound absorbing arrangement. The cover sheet is preferably arranged across the opening and covers the outer faces of the first and the second sound absorbing elements. The cover sheet may for example have a print or specific colour to provide at desired visual expression.

[0053] In a sixth aspect it should be understood that the acoustic panel and parts thereof may be provided as kits or a collection of parts. This allows for the acoustic panel to be assembled on site.

[0054] Detailed description

[0055] The support element should in one embodiment have a higher stiffness than the first sound absorbing element and the second sound absorbing element. This allows for the support element to control and withstand deformation of the sound absorbing elements.P7579PC00

[0056] 7

[0057] The support element can for example be formed of a plastic or a metal material. In one embodiment the support element is an extruded aluminium profile.

[0058] In one embodiment where the sound absorbing element is formed of stone wool as discussed herein the Young’s modulus of such a sound absorbing element is typically between 150 and 200kPa. A support element with a higher Young’s modulus would thus be suitable providing further stability to the sound absorbing arrangement and the acoustic panel. A support element with a Young’s modulus of above 0.5GPa would generally be preferred.

[0059] For example, plastic materials, such as PVC, PET and PP, have a Young’s modulus typically in the range of 1 - 4GPa. Aluminium has a Young’s modulus at 68GPa. As mentioned, all of these would be suitable choices for the support element depending on the size, use and application of the acoustic panel.

[0060] The support element, or a part of the support element, such as the outer surface of the cover flange, may be coated with a colour and / or texture similar or identical to the surface of the sound absorbing elements.

[0061] In order to increase the stiffness of the support element, the support element may further comprise a support flange, which extends perpendicularly from the cover flange. The cover flange and the support flange may for example form a support element in the shape of a T-profile, where the cover flange forms the top of the T and the support flange forms the leg of the T.

[0062] The support element is preferably arranged such that the support flange extends along the abutment line between the first sound absorbing element and the second sound absorbing element. Thus, it can be understood that the support flange forms part of the abutment line as it separates the first sound absorbing element and the second sound absorbing element.

[0063] In particular, the support element may in one embodiment be arranged such that the first sound absorbing element abuts a first side of the support flange and the second sound absorbing element abuts a second side of the support flange. The first side and the second side of the support flange face in opposite directions.P7579PC00

[0064] 8

[0065] In one embodiment the support element further comprises a first retaining flange, which extends from the first side of the support flange with a distance di to the cover flange. This provides a support element with increased stability. The first retaining flange also provides a first recess defined by the cover flange the support flange and the first retaining flange wherein a part of the first sound absorbing element can be received and held in place.

[0066] Similarly, in an additional or alternative embodiment, the support element comprises a second retaining flange, which extends from the second side of the support flange with a distance da to the cover flange. In other words, the second retaining flange and the first retaining flange extend in opposite directions from the support flange. As described above this further increases the stability of the acoustic panel. The second retaining flange also provides a second recess defined by the cover flange, the support flange and the second retaining flange wherein a part of the second sound absorbing element can be received and held in place.

[0067] In embodiments where both the first retaining flange and the second retaining flange are provided, the cover flange, the support flange and the retaining flanges together provide a support element in the form of an l-profile. Such an l-profile provides high stability. The first and the second recesses can be designed to hold the neighbouring first and second sound absorbing elements in place as described above and prevent that the first and second sound absorbing elements move away from each other, thereby providing a gap along the abutment line. The first and the second recesses also prevent that the absorbing elements shift laterally relative to each other, i.e. along the thickness of the opening t0when placed in the frame.

[0068] In one embodiment the first and / or the second retaining flange extends perpendicular to the respective first and / or second side of the support flange and parallel to the cover flange. However, the first and / or the second flange may also extend away from the respective first and / or second side of the support flange at an angle larger than 90°. This creates a funnel shaped first and / or second recess that facilitates the insertion of the respective sound absorbing elements into the recesses. Such an angle which creates such a funnel can for example be between 100° and 140°.P7579PC00

[0069] 9

[0070] In one embodiment the distance di and / or da corresponds to the thickness ti and / or t2of the respective first and / or second sound absorbing element. This provides a good fit when the sound absorbing elements are inserted into the respective recesses as described.

[0071] In one alternative embodiment the distance di and / or da are slightly smaller than the thickness ti and / or t2of the respective first and / or second sound absorbing element. This is particularly advantageous when the sound absorbing element can be compressed, e.g. when formed of a mineral wool material, such that when a slightly compressed sound absorbing element is inserted into a recess as described, the tensions of the compressed material will hold it better in place.

[0072] In one embodiment the first retaining flange extends a distance rwi from the first side of the support flange and the cover flange extends a distance cwi from the first side of the support flange, wherein the distance rwi is larger than the distance cwi.

[0073] Similarly in an alternative or additional embodiment the second retaining flange extends a distance rw2from the second side of the support flange and the cover flange extends a distance cw2from the second side of the support flange, wherein the distance rw2is larger than the distance cw2.

[0074] By having the retaining flanges extend further than the cover flange, access is provided to the retaining flange. This can for example be an advantage if the retaining flanges are used to secure the support element to the acoustic panel, for example to an anchor point as will be described below. Thus, by having longer retaining flanges it is easier to use a tool, such as a screwdriver, in order to screw through the retaining flange and into an anchor point.

[0075] A groove may in one embodiment be formed in the first and / or second retaining flange which facilitates positioning and drilling of the screw.

[0076] A first groove can in one embodiment be arranged on the first retaining flange at a distance from the first surface of the support flange greater than the extent of the cover flange from the first surface of the support flange.P7579PC00

[0077] 10

[0078] Similarly, a second groove can be arranged on the second retaining flange at a distance from the second surface of the support flange greater than the extent of the cover flange from the second surface of the support flange.

[0079] In one embodiment the support element extends along the abutment line between a first end of the support element at a first anchor point and a second end of the support element at a second anchor point. The anchor points are areas where the support element advantageously can be connected to the rest of the acoustic panel.

[0080] For example, in one embodiment, the first anchor point can be provided on the frame or another support element and the second anchor point can be provided on the frame or another support element.

[0081] Thus, the first end of the support element can be attached to the first anchor point and the second end of the support element can be attached to the second anchor point.

[0082] In one embodiment the sound absorbing arrangement may comprise more sound absorbing elements than two. Thus, the sound absorbing arrangement may for example comprise at least a third sound absorbing element and / or at least a fourth sound absorbing element.

[0083] Furthermore, in another embodiment, the acoustic panel may comprise a plurality of support elements arranged between different sound absorbing elements. For example, in one embodiment a first support element may be arranged where the first and the second sound absorbing elements abut or meet as described generally herein. However, in a similar manner, a second support element may be arranged where the second and a third sound absorbing elements abut and / or a third support element may be arranged where the third and a fourth sound absorbing elements abut, and so on.

[0084] In one embodiment a cover sheet may be stretched across the acoustic panel. The cover sheet may for example provide a desired visual effect, for example by having a print provided thereon.

[0085] In order to attach the cover sheet, the acoustic panel may in one embodiment comprise a cover recess provided in the frame. The cover recess may extend around the frame.P7579PC00

[0086] 11

[0087] Thus, a cover sheet, comprising a cover height and a cover width corresponding to the distance between the cover recess as it extends around the frame, can be arranged across the frame. In one embodiment the cover sheet may further comprise at least one attachment element for fastening the cover sheet to the frame by connecting the fastening elements in the cover recess.

[0088] Drawings

[0089] Figure 1 shows an exploded view of an acoustic panel as disclosed herein,

[0090] Figures 2a - 2e, show in one embodiment a method of assembling an acoustic panel as disclosed herein.

[0091] Figure 3, shows a section III - III of the frame of the acoustic panel of the above embodiment,

[0092] Figure 4, shows a section IV - IV of a first embodiment of a support element as disclosed herein and used in the above embodiment,

[0093] Figure 5, shows in section a second embodiment of a support element as disclosed herein,

[0094] Figure 6, shows an array of acoustic panels,

[0095] Figure 7, shows another embodiment of an acoustic panel, and

[0096] Figure 8, shows a cross section VIII - VIII of the acoustic panel of Figure 7.

[0097] Description of the drawings

[0098] An exploded view of one embodiment of an acoustic panel 1 as disclosed herein is shown in Fig. 1.

[0099] The acoustic panel comprises a frame 2 which in the current embodiment is formed of a first, a second, a third and a fourth side element 21, 22, 23, 24. The side elements 21, 22, 23, 24 are formed of aluminium extruded profiles which are cut in 45° at each end in order to form 90° mitered frame corners when the side elements are assembled.P7579PC00

[0100] 12

[0101] The frame 2 defines an opening 3. The opening has an opening width w0, an opening height h0and an opening thickness t0. A sound absorbing arrangement 4 is placed in the opening. A back surface 25 and a protrusion 26, as shown in section III - III of Fig.1 shown in Fig. 3, are formed on the inside of the frame extending around the opening 3. The back surface 25 and the protrusion 26 retain the sound absorbing arrangement in the opening as will be discussed and shown. The opening is a through-going opening where the back surface describes a back end or inner surface of the opening, and the opposite end of the through-going opening describes a front end or outer surface of the opening.

[0102] In the current embodiment the sound absorbing arrangement is formed of a first sound absorbing element 5 and a second sound absorbing element 6.

[0103] A support element in the shape of an l-profile 14 is arranged between the first sound absorbing element 5 and the second sound absorbing element 6.

[0104] The l-profile 14 is formed of a cover flange 8, a support flange 9, a first retaining flange 12 and a second retaining flange 13. The l-profile 14 is also seen in more detail along section IV-IV in Fig. 4.

[0105] The frame 2 can be pre-mounted on a wall and the sound absorbing arrangement 4 and the l-frame can be front mounted in the opening 3. However, the acoustic panel can also be fully assembled on a floor or off-site if needed and the l-profile will ensure a stable assembly which can be handled or transported if needed.

[0106] A first assembly step is shown in Fig. 2a where the first sound absorbing element is inserted in the frame. The first sound absorbing element is inserted through the front end of the opening in the frame. And the first sound absorbing element is pressed along the edges so that it is retained between the back surface 25 and the protrusion 26 and pushed against the second side element 22 of the frame 2.

[0107] In a second assembly step as shown in Fig. 2b the l-profile 14 is inserted into the frame 2 . The l-profile is inserted through the front end of the opening in the frame. The l-profile is inserted such that the free side of the first sound absorbing element (opposite the side arranged against the second side element 22 of the frame 2) is received in the recess ofP7579PC00

[0108] 13

[0109] the l-profile defined by the cover flange 8, the support flange 9 and the first retaining flange 12.

[0110] When arranged in the frame the first and the second retaining flanges 12, 13 of the I-profile abut against the back surface 25 of the frame 2. In order to secure the l-profile to the frame two screws 31 , 32 are drilled through the second retaining flange 13 and into a first anchor point 30 and a second anchor point (not visible) in the back surface 25 of the frame 2.

[0111] In a third assembly step as shown in Fig. 2c the second sound absorbing element 6 is inserted into the frame 2. The second sound absorbing element is inserted through the front end of the opening in the frame. The second sound absorbing element is inserted such that a side of the sound absorbing element 6 is received in the recess defined by the cover flange, the support flange and the second retaining flange of the l-profile. The second sound absorbing element is subsequently pressed into the frame such that it is received between the back surface 25 and the protrusion 26 of the frame, and the side of the second sound absorbing element 6 opposite the side received in the l-profile abuts against the fourth side element 24 of the frame 2.

[0112] After installing the second sound absorbing element 6, the sound absorbing arrangement 4 is fully installed in the frame as shown in Fig. 2d. The cover flange 8 of the support element 9 covers the abutment line (not seen as it is covered) where the first sound absorbing element transitions to the second sound absorbing element.

[0113] Finally, a cover sheet 40 is attached to the frame such that the cover sheet 40 covers the sound absorbing arrangement 4 and the l-profile 14, as shown in Fig. 2e. The cover sheet 40 may for example have a print thereon in order to provide a visually desired scene. A recess 41 extends around the edge of the frame and a friction element 42 attached to the edge of the cover sheet is pressed into the recess, whereby the cover sheet 40 is firmly attached to the frame 2. Other means of securing the cover sheet to the frame may be provided.

[0114] The l-profile 14 used in the embodiment discussed above is shown in in Fig. 4, corresponding to section IV - IV as illustrated in Fig. 1. As can be seen the cover flange 8 is arranged at one end of the support flange. The first retaining flange 12 and the secondP7579PC00

[0115] 14

[0116] retaining flange 13 are arranged at a second end of the support flange opposite the cover flange.

[0117] An outer surface 8’ of the cover flange is provided with a curvature which provides the visual effect of the cover flange, where the visibility of the cover flange is reduced through the cover sheet 40. The outer surface 8’ may also be coated in a colour similar or preferably identical to the colour of the outer surface of the first and second sound absorbing elements 5, 6. A roughened surface on the outer surface 8’ may also be provided which diffuses the reflected light which in some embodiment also reduces the visibility of the surface flange through the cover sheet.

[0118] The cross section, as shown in Fig. 4, is uniform along the extension of the l-profile. The support flange 9 extends perpendicular from the middle of the cover flange 8, such that the cover flange extends in two opposite directions from the support flange at equal distances cw1 and cw2.

[0119] The first retaining flange extends from a first side 9’ of the support flange 9 in a distance rw1 from the support flange and is spaced with a distance d1 to the cover flange 8.

[0120] In a similar manner extends the second retaining flange from a second side 9” of the support flange. The second side faces 9” in the opposite direction of the first side 9’. The second retaining flange extends in a distance rw2 from the support flange and is spaced with a distance d2 to the cover flange 8.

[0121] In the current embodiment the distances d1 and d2 are identical.

[0122] In the current embodiment the distances d1 and d2 also correspond to the thickness t1 and t2 of the first and second sound absorbing elements, respectively. However, in an alternative embodiment the distance d1 and d2 could be slightly smaller than the respective thicknesses t1 and t2 which would result in the sound absorbing element being compressed into the l-profile for a tight fit.

[0123] The first and the second retaining flanges also extend further from the support flange than the cover flange. I.e. the respective distances rw1 and rw2, corresponding to the extent of the respective first and second retaining flanges, are larger than the respectiveP7579PC00

[0124] 15

[0125] distances cw1 and cw2. As previously discussed, this allows easy access to the l-profile, e.g. when attaching it to the frame, such as described in relation to and shown in Fig.2b.

[0126] To facilitate attaching the l-profile to the frame by using a screw, a first and a second groove 121 , 131 are arranged on the first and second retaining flange respectively. This prevents the screw from sliding around on the surface of the retaining flanges and facilitates the mounting.

[0127] In order to provide easy access to the first and second groove during mounting they are arranged at a distance from the support flange greater than the extent of the cover flange from the support flange, i.e. greater than the respective distances cw1 and cw2.

[0128] The l-profile is formed by extruding an aluminium profile with the cross-section as shown in Fig.4. That means that the features shown and described with respect to the l-profile all extend from end to end on the aluminium profile. Some features may be applied after extruding but is generally avoided if possible as it adds to the manufacturing time and cost associated thereto. In the current embodiment the only post processing step of the aluminium profile discussed here is the coating and possible treatment of the outer surface 8’ of the cover flange.

[0129] A second embodiment of a support element 60 is shown in Fig. 5. The support element comprises a support flange 61 with a cover flange 62 at one end and a retaining flange 63 extends in one direction from the support flange at the opposite end of the cover flange.

[0130] As discussed, the acoustic panel can be used to improve the acoustic environment in a building, for example in a large office space. The acoustic panel as discussed herein allows for large installation as the support element, such as an l-profile, provides support for such installation.

[0131] However, an installation may in one embodiment also comprise an array of acoustic panels as shown in Fig. 6, where three acoustic panels 64, 65, 66 are arranged together.

[0132] The frames of the acoustic panels are connected to each other by screws 67’, 67”, 68’, 68” through neighbouring frames. By using frames as discussed herein where the sound absorbing arrangement can be mounted from the front it enables for a full frameP7579PC00

[0133] 16

[0134] construction to be installed and connected together to neighbouring frames via e.g. screws as shown in order to establish a robust and sturdy frame construction. The sound absorbing arrangement may then subsequently be installed which provides a much faster installation process than previously.

[0135] In another embodiment there is provided an acoustic panel 70 with a sound absorbing arrangement comprising a first sound absorbing element 71 , a second sound absorbing element 72 and a third sound absorbing element 73 arranged within a frame 74.

[0136] The first and second sound absorbing element thus forms a first abutment line which is covered by a first support element 75. Similarly, the first and second sound absorbing elements form a second abutment line against the third sound absorbing element which is covered by a second support element 76. As can be seen in Fig. 7, the second support element extends across the frame from one side to the opposite side, i.e. perpendicular to two opposing frame sides. The first support element extends from the frame, in the current case it extends from a frame side perpendicular to the two opposing frame sides securing the second support element, to the second support element. As can be seen the first support element extends transverse, such as perpendicular, to the second support element.

[0137] The second support element extends between a first end 761 and a second end 762. At the first and the second end the first support element is attached to the frame at respective anchor points (not visible) using screws in a manner similar as described above in relation to Fig.2b.

[0138] The first support element extends between a first end 751 and a second end 752. The first end 751 of the first support element is attached to the frame anchor point (not visible) using a screw in a manner as discussed in relation to Fig.2b and as the first and second ends 761 , 762 of the second support element above.

[0139] The second end 752 of the first support element is attached to the second support element at an anchor point 800, which in the current embodiment is an area on the support flange 763 of the second support element 76 as shown in Fig.8 as section VIII -VIII illustrated in Fig. 7. To simplify the view, the frame and the first, second and third sound absorbing elements have been removed from the section view in Fig.8.P7579PC00

[0140] 17

[0141] An angled bracket 801 is used to attach the first support element to the anchor point at the second support element. A first screw 802 is used to attach a first flange 803 of the angled bracket to the first second support element and a second screw 804 is used to attach a second flange 805 of the angled bracket to the second support element. The first and the second flanges are perpendicular to each other, forming a 90° angled bracket.

[0142] The first edge 753 and the second edge 754 of the second end 752 of the first support element have been cut to form tapered edges such that the first support element abuts against the support flange 763 of the second support element.

[0143] In order to prevent the screw from sliding around during mounting of the angled bracket 801, first and second screw grooves 755, 765 are provided on the first and second support elements, respectively.

[0144] Thus, it can be understood that the acoustic panel may comprise a plurality of support elements arranged between different sound absorbing elements. For example, in one embodiment a first support element may be arranged where the first and the second sound absorbing element abut or meet as described generally herein. However, in a similar manner, a second support element may be arranged where the second and a third sound absorbing element abut and / or a third support element may be arranged where the third and a fourth sound absorbing element abut, and so on.

[0145] Reference numbers

[0146] acoustic panel 1 ; 64; 65; 66; 70

[0147] frame 2; 74

[0148] first, second, third and fourth side elements of the frame 21 , 22, 23, 24

[0149] opening of the frame 3

[0150] sound absorbing arrangement 4

[0151] back surface of the frame 25

[0152] protrusion of the frame 26

[0153] first sound absorbing element 5; 71

[0154] second sound absorbing element 6; 72

[0155] third sound absorbing element 73

[0156] support element 14; 60; 75; 76

[0157] cover flange 8; 62

[0158] support flange 9; 61 ; 763P7579PC00

[0159] 18

[0160] first retaining flange 12; 63

[0161] second retaining flange 13

[0162] two screws 31 , 32

[0163] anchor point 30; 800

[0164] cover sheet 40

[0165] recess 41

[0166] friction element 42

[0167] outer surface 8’ of the cover flange

[0168] first side 9’ of the support flange 9

[0169] second side 9” of the support flange 9

[0170] first groove 121 on the first retaining flange 12

[0171] second groove 131 on the second retaining flange 13

[0172] screws 67’; 67”; 68’; 68”

[0173] first end 751 ; 761 of a support element

[0174] second end 752; 762 of a support element

[0175] angled bracket 801

[0176] first screw 802

[0177] first flange 803 of the angled bracket

[0178] second screw 804

[0179] second flange 805 of the angled bracket

[0180] first edge 753 of the second end 752 of the first support element

[0181] second edge 754 of the second end 752 of the first support element

[0182] first screw groove 755 on the first support element

[0183] second screw groove 765 on the second support element

[0184] Embodiments

[0185] 1. An acoustic panel (1 ; 64; 65; 66; 70) comprising

[0186] - a frame (2; 74) defining an opening (3),

[0187] - a sound absorbing arrangement (4) arranged in the opening (3) and comprising at least a first sound absorbing element (5; 71) and a second sound absorbing element (6; 72) arranged next to each other to form an abutment line, and - a support element (14; 75; 76) comprising a cover flange (8),

[0188] wherein the cover flange (8) is arranged on at least a part of the abutment line such that the cover flange (8) covers the at least part of the abutment line and at least a part of the first sound absorbing element (5; 71) and at least a part of theP7579PC00

[0189] 19

[0190] second sound absorbing element (6; 72) next to the at least part of the abutment line.

[0191] 2. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 1 , wherein the support element (14; 75; 76) further comprises a support flange (9; 763) which extend perpendicularly from the cover flange (8), wherein the support element (14; 75; 76) is arranged such that the support flange (9; 763) extends along the abutment line between the first absorbing element (5; 71 ) and the second absorbing element (6; 72).

[0192] 3. The acoustic panel (1; 64; 65; 66; 70) according to embodiment 2, wherein the first sound absorbing element (5) abuts a first side (9’) of the support flange (9) and the second sound absorbing element (6) abuts a second side (9”) of the support flange (9), where the first side (9’) and the second side (9”) of the support flange (9) faces in opposite directions.

[0193] 4. The acoustic panel (1 ; 64; 65; 66; 70) according to embodimentl, 2 or 3, wherein the support element (14; 75; 76) comprises a first retaining flange (12), which extend from the first side (9’) of the support flange (9) with a distance di to the cover flange (8).

[0194] 5. The acoustic panel (1; 64; 65; 66; 70) according to embodiment 4, wherein a part of the first sound absorbing element (5; 71 ) is received between the cover flange (8) and the first retaining flange (12).

[0195] 6. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 4 or 5, wherein the distance d1 corresponds to the thickness ti of the first sound absorbing element (5; 71).

[0196] 7. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 4, 5 or 6, wherein the first retaining flange (12) extend a distance rwi from the first side (9’) of the support flange (9) and the cover flange (8) extend a distance cwi from the first side (9’) of the support flange (9), wherein the distance rwi is larger than the distance cwi.

[0197] 8. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the preceding embodiments, wherein the support element (14; 75; 76) comprises a secondP7579PC00

[0198] 20

[0199] retaining flange (13), which extend from the second side (9”) of the support flange (9) with a distance da to the cover flange (8).

[0200] 9. The acoustic panel (1; 64; 65; 66; 70) according to embodiment 8, wherein a part of the second sound absorbing element (6; 72) is received between the cover flange (8) and the second retaining flange (13).

[0201] 10. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 8 or 9, wherein the distance da corresponds to the thickness t2of the second sound absorbing element (6; 72).

[0202] 11. The acoustic panel (1 ; 61 ; 62; 63; 70) according to embodiment 8, 9 or 10, wherein the second retaining flange (13) extend a distance rwa from the second side (9”) of the support flange (9) and the cover flange (8) extend a distance cw2from the second side (9”) of the support flange (9), wherein the distance rw2is larger than the distance cw2.

[0203] 12. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the embodiments 1 - 11, wherein the support element (14; 75; 76) extends along the abutment line between a first end (751 ; 761 ) of the support element (14; 75; 76) at a first anchor point (30; 800) and a second end (752; 762) of the support element (14; 75; 76) at a second anchor point (30; 800).

[0204] 13. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 12, wherein the first anchor point (30; 800) is the frame (2; 74) or another support element (14; 75; 76) and the second anchor point (30; 800) is the frame (2; 74) or another support element (14; 75; 76).

[0205] 14. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 12 or 13, wherein the first end (751 ; 761) of the support element (14; 75; 76) is attached to the first anchor point (30; 800) and the second end (752; 762) of the support element (14; 75; 76) is attached to the second anchor point (30; 800).

[0206] 15. The acoustic panel (70) according to any one of the embodiments 1 - 14, wherein the sound absorbing arrangement comprises an at least third (73) and a fourth sound absorbing element.P7579PC00

[0207] 21

[0208] 16. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the embodiments 1 - 15, wherein the cover flange covers at least a part of an outer face of the first sound absorbing element (5; 71 ) and at least a part of an outer face of the second sound absorbing element (6; 72), and a cover sheet is arranged across the opening and covers the outer faces of the first and the second sound absorbing elements.

[0209] 17. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the preceding embodiments wherein a cover recess (41) is provided in the frame (2; 74) and where the cover recess (41) extends around the frame (2; 74).

[0210] 18. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 17, wherein the acoustic panel (1 ; 64; 65; 66; 70) further comprises a cover sheet (40) comprising a cover height and a cover width corresponding to the distance between the cover recess (41) as it extends around the frame (2; 74) and wherein the cover sheet (40) further comprises at least one attachment element (42) for fastening the cover sheet (40) to the frame (2; 74) by connecting the at least one fastening element (42) in the cover recess (41).

[0211] 19. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the embodiments 1 - 18, wherein the at least first (5; 71 ) and second sound absorbing elements (6; 72) are formed of a mineral wool, such as glass wool or stone wool.

[0212] 20. The acoustic panel (1 ; 64; 65; 66; 70) according to embodiment 19, wherein the first (5; 71) and second sound absorbing elements (6; 72) are formed of stone wool with a density of between 40 - 200 kg / m3, such as 80 - 150 kg / m3, for example 90 kg / m3.

[0213] 21. A method for providing an acoustic panel (1 ; 64; 65; 66; 70), wherein the method comprises the steps of

[0214] - providing a frame (2; 74) defining an opening (3),

[0215] - arranging a sound absorbing arrangement (4) in the opening (3) of the frame (2; 74), wherein the sound absorbing arrangement (4) comprises at least a first sound absorbing element (5; 71) and a second sound absorbing element (6; 72) arranged next to each other forming an abutment line,P7579PC00

[0216] 22

[0217] - arranging a support element (14; 75; 76) comprising a cover flange (8) in the acoustic panel such that the cover flange (8) is arranged on at least a part of the abutment line such that the cover flange (8) covers the at least part of the abutment line and at least a part of the first sound absorbing element (5; 71) and at least a part of the second sound absorbing element (6; 72) next to the at least part of the abutment line.

[0218] 22. The method according to embodiment 21 , comprising the following steps in sequence - arranging the first sound absorbing element (5; 71) in the opening of the frame (2; 74),

[0219] - arranging the support element (14; 75; 76) in the opening of the frame, and - arranging the second sound absorbing element (6; 72) in the opening of the frame (2; 74).

[0220] 23. The method according to embodiment 21 or 22, wherein the method comprises providing an acoustic panel (1 ; 64; 65; 66; 70) according to any one of the embodiments 1 - 19.

[0221] 24. An array of acoustic panels (64; 65; 66) comprising at least two acoustic panels (64; 65; 66;) according to any one of the embodiments 1 - 20, arranged on a vertical surface such as a wall.

[0222] 25. A support element (14; 75; 76) for use in an acoustic panel according to embodiments 1 - 20, wherein the support element (14; 75; 76) extends from a first end (751; 761) of the support element to a second end (752; 762) of the support element, wherein the support element (14; 75; 76) comprises

[0223] - a cross section which is uniform along the extent of the support element (14; 75; 76, - a cover flange (8) extending between the first (751 ; 761) and the second ends (751; 762) of the support element (15; 75; 76), and

[0224] - a support flange (9) extending perpendicular to the cover flange (8).

[0225] 26. The support element (14; 75; 76) according to embodiment 25, wherein the support flange (9) extends from the middle of the cover flange (8).P7579PC00

[0226] 23

[0227] 27. The support element (14; 75; 76) according to embodiment 25 or 26, wherein a first retaining flange (12) extends from a first side (9’) of the support flange (9) with a distance di to the cover flange (8).

[0228] 28. The support element (14; 75; 76) according to embodiment 27, wherein the first retaining flange (12) extends a distance rwi from the first side (9’) of the support flange (9) and the cover flange (8) extends a distance cwi from the first side (9’) of the support flange (9), wherein the distance rwi is larger than the distance cwi.

[0229] 29. The support element (14; 75; 76) according to embodiment 28, wherein a first groove (121) is arranged on the first retaining flange (12) at a distance from the first surface (9’) of the support flange (9) greater than the extent, distance cwi , of the cover flange (8) from the first surface (9’) of the support flange (9).

[0230] 30. The support element (14; 75; 76) according to embodiment 27, 28 or 29, wherein a second retaining flange (13), extends from a second side (9”) of the support flange (9) with a distance da to the cover flange (8), wherein the first side (9’) and the second side (9”) of the support flange face in opposite directions.

[0231] 31. The support element (14; 75; 76) according to embodiment 30, wherein the second retaining flange (13) extends a distance rw2from the second side (9”) of the support flange and the cover flange (8) extends a distance cw2from the second side (9”) of the support flange, wherein the distance rw2is larger than the distance cw2.

[0232] 32. The support element (14; 75; 76) according to embodiment 31, wherein a second groove (131) is arranged on the second retaining flange (13) at a distance from the second surface (9”) of the support flange greater than the extent, distance cw2, of the cover flange (8) from the second surface (9”) of the support flange.

[0233] 34. A method of mounting an acoustic panel (1 ; 64; 65; 66; 70) according to any one of the embodiments 1 - 20, wherein the frame (2; 74) is mounted vertically on a wall and fixed with fasteners, such as screws, wherein the sound absorbing arrangement (4) is inserted into the frame (2; 74) by pushing it into the opening (3) of the frame.

[0234] 35. A method according to embodiment 34, wherein a covers sheet (40) is arranged over the frame (2; 74) such that it covers the sound absorbing arrangement (4).

Claims

P7579PC0024Claims1. An acoustic panel (1 ; 64; 65; 66; 70) comprising- a frame (2; 74) defining an opening (3),- a sound absorbing arrangement (4) arranged in the opening (3) and comprising at least a first sound absorbing element (5; 71) and a second sound absorbing element (6; 72) arranged next to each other to form an abutment line,- a support element (14; 75; 76) comprising a cover flange (8),wherein the cover flange (8) is arranged on at least a part of the abutment line such that the cover flange (8) covers the at least part of the abutment line and at least a part of an outer face of the first sound absorbing element (5; 71) and at least a part of an outer face of the second sound absorbing element (6; 72) next to the at least part of the abutment line, and- a cover sheet is arranged across the opening and covers the outer faces of the first and the second sound absorbing elements.

2. The acoustic panel (1 ; 64; 65; 66; 70) according to claim 1 , wherein the support element (14; 75; 76) further comprises a support flange (9; 763) which extends perpendicularly from the cover flange (8), wherein the support element (14; 75; 76) is arranged such that the support flange (9; 763) extends along the abutment line between the first absorbing element (5; 71 ) and the second absorbing element (6; 72).

3. The acoustic panel (1; 64; 65; 66; 70) according to claim 2, wherein the first sound absorbing element (5) abuts a first side (9’) of the support flange (9) and the second sound absorbing element (6) abuts a second side (9”) of the support flange (9), where the first side (9’) and the second side (9”) of the support flange (9) face in opposite directions.

4. The acoustic panel (1 ; 64; 65; 66; 70) according to claim 1 , 2 or 3, wherein the support element (14; 75; 76) comprises a first retaining flange (12), which extends from the first side (9’) of the support flange (9) with a distance di to the cover flange (8), and wherein a part of the first sound absorbing element (5; 71) is received between the cover flange (8) and the first retaining flange (12).

5. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the preceding claims, wherein the support element (14; 75; 76) comprises a second retaining flangeP7579PC0025(13), which extends from a second side (9”) of the support flange (9) with a distance da to the cover flange (8), and wherein a part of the second sound absorbing element (6; 72) is received between the cover flange (8) and the second retaining flange (13).

6. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the claims 1 - 5, wherein the support element (14; 75; 76) extends along the abutment line between a first end (751 ; 761) of the support element (14; 75; 76) at a first anchor point (30; 800), and a second end (752; 762) of the support element (14; 75; 76) at a second anchor point (30; 800), and wherein the first end (751 ; 761) of the support element (14; 75; 76) is attached to the first anchor point (30; 800) and the second end (752; 762) of the support element (14; 75; 76) is attached to the second anchor point (30; 800).

7. The acoustic panel (70) according to any one of the claims 1 - 6, wherein the sound absorbing arrangement (4) comprises at least a third sound absorbing element (73) and at least a fourth sound absorbing element.

8. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the preceding claims, wherein a cover recess (41) is provided in the frame (2; 74) and where the cover recess (41) extends around the frame (2; 74), and wherein the cover sheet (40) comprises a cover height and a cover width corresponding to the distance between the cover recess (41 ) as it extends around the frame (2; 74), and wherein the cover sheet (40) further comprises at least one attachment element (42) for fastening the cover sheet (40) to the frame (2; 74) by connecting the at least one fastening element (42) in the cover recess (41).

9. The acoustic panel (1 ; 64; 65; 66; 70) according to any one of the claims 1 - 8 wherein the first (5; 71) and second sound absorbing elements (6; 72) are formed of stone wool with a density of between 40 - 200 kg / m3, such as 80 - 150 kg / m3, for example 90 kg / m3.

10. A method for providing an acoustic panel (1 ; 64; 65; 66; 70), wherein the method comprises the steps of- providing a frame (2; 74) defining an opening (3),P7579PC0026- arranging a sound absorbing arrangement (4) in the opening (3) of the frame (2; 74), wherein the sound absorbing arrangement (4) comprises at least a first sound absorbing element (5; 71) and a second sound absorbing element (6; 72) arranged next to each other forming an abutment line,- arranging a support element (14; 75; 76) comprising a cover flange (8) in the acoustic panel such that the cover flange (8) is arranged on at least a part of the abutment line such that the cover flange (8) covers the at least part of the abutment line and at least a part of the first sound absorbing element (5; 71) and at least a part of the second sound absorbing element (6; 72) next to the at least part of the abutment line.

11. The method according to claim 10, comprising the following steps in sequence - arranging the first sound absorbing element (5; 71) in the opening of the frame (2; 74),- arranging the support element (14; 75; 76) in the opening of the frame, and - arranging the second sound absorbing element (6; 72) in the opening of the frame (2; 74).

12. The method according to claim 11 or 12, wherein the method comprises providing an acoustic panel (1 ; 64; 65; 66; 70) according to any one of the claims 1 - 9.

13. A support element (14; 75; 76) for use in an acoustic panel according to any one of the claims 1 - 9,wherein the support element (14; 75; 76) extends from a first end (751; 761) of the support element to a second end (752; 762) of the support element, wherein the support element (14; 75; 76) comprises- a cross section which is uniform along the extent of the support element (14; 75; 76,- a cover flange (8) extending between the first (751 ; 761) and the second ends (751 ; 762) of the support element (15; 75; 76), and- a support flange (9) extending perpendicular to the cover flange (8).

14. The support element (14; 75; 76) according to claim 13,wherein the support flange (9) extends from the middle of the cover flange (8).P7579PC002715. The support element (14; 75; 76) according to claim 13 or 14,wherein a first retaining flange (12) extends from a first side (9’) of the support flange (9) with a distance di to the cover flange (8), and wherein the first retaining flange (12) extends a distance rwi from the first side (9’) of the support flange (9), and the cover flange (8) extends a distance cwi from the first side (9’) of the support flange (9), wherein the distance rwi is larger than the distance cwi.

16. The support element (14; 75; 76) according to claim 13, 14 or 15,wherein a second retaining flange (13), extends from a second side (9”) of the support flange (9) with a distance da to the cover flange (8), wherein the first side (9’) of the support flange and the second side (9”) of the support flange face in opposite directions, and wherein the second retaining flange (13) extends a distance rw2from the second side (9”) of the support flange, and the cover flange (8) extends a distance cw2from the second side (9”) of the support flange, wherein the distance rw2is larger than the distance cw2.

Images