baffle

Abstract

Baffle, featuring: - a plate-shaped support structure (2) made of a material that is at least partially air-permeable and at least partially sound-absorbing, which has a first surface (2a), a second surface (2b) facing away from the first surface (2a), a thickness, and a recess (2c), - a frame structure (3) to which the support structure (2) is attached, - a layer (5) applied over the entire surface of the first surface (2a) of the support structure (2), which is at least partially sound-transparent and which in particular forms a projection surface for projecting an image or which is an imaging layer for displaying an image, and - a sound-generating transducer (4) arranged in the recess (2c) behind the layer (5), which is able to radiate the sound through the layer (5).

Description

[0001] The invention relates to a sound baffle with an integrated sound transducer.

[0002] EP 1 078 300 B1 discloses a projection screen with a projection surface formed from segments, at least two of which are sound-emitting segments capable of emitting sound waves from the projection surface. The projection surface is designed for projecting an image. The image is projected onto the projection surface, for example, using a projector. This makes it possible, for instance, to project a film onto the projection surface using a sequence of images. At least one sound transducer is required for the sound associated with the film.

[0003] The object of the present invention is to provide an improved sound baffle, in particular a projection screen with an integrated sound transducer.

[0004] The object of the invention is achieved by a sound baffle comprising a plate-shaped support structure made of a material that is at least partially air-permeable and at least partially sound-absorbing, which has a first surface, a second surface facing away from the first surface, a thickness, and a recess; a frame structure to which the support structure is attached; a layer that is at least partially sound-transparent and applied over the entire surface of the first surface of the support structure; and a sound-generating transducer arranged in the recess behind the layer, which is capable of radiating the sound through the layer. The layer is, in particular, a projection surface for projecting an image or an imaging layer for displaying an image.

[0005] Another aspect of the invention relates to a modular sound baffle device comprising several sound baffles designed as sound baffle modules according to the invention, which are arranged side by side, in particular in a matrix-like arrangement, to form the modular sound baffle device, and in particular the layers of the sound baffle modules together form a total projection surface or an imaging layer for displaying an image. "Side by side" is understood not only to mean that the sound baffle modules are arranged horizontally next to each other, but the transducers can also be arranged vertically next to each other.

[0006] Another aspect of the invention relates to a device comprising the sound baffle or the modular sound baffle device according to the invention, a projector for projecting a series of images onto the projection surface, and a control device connected to and controlling the sound transducer or transducers and the projector, such that the sound emitted by the sound transducer or transducers is synchronous with the series of images.

[0007] Another aspect of the invention relates to a device comprising the sound baffle according to the invention or the modular sound baffle device according to the invention, wherein the layer or layers are designed as an imaging layer or as imaging layers, and a control device connected to the sound transducer or transducers and the imaging layer or layers, which is configured to control the sound transducer or transducers and the imaging layer or layers in such a way that the sound emitted by the sound transducer or transducers is synchronous with a series of images displayed by the imaging layer or layers.

[0008] The sound baffle according to the invention therefore comprises the plate-shaped support structure made of a material that is at least partially air-permeable and at least partially sound-absorbing, the frame device, and the sound transducer. The frame device is preferably self-supporting and is, in particular, stable enough to bear the mass of the support structure, the sound transducer, and the layer.

[0009] The sound baffle is rectangular in shape and has, for example, side lengths of 0.6m to 3.0m.

[0010] The sound transducer is positioned in the recess of the support structure. It can be arranged that the sound transducer is attached directly to the support structure or to the frame assembly.

[0011] The frame device may also have at least one transverse and / or at least one longitudinal strut to increase stiffness or load-bearing capacity.

[0012] The frame is made of materials such as wood, plastic or metal, for example aluminum.

[0013] The transducer is, for example, a beamforming or beam steering transducer. Preferably, the transducer is a BMR (Balanced Mode Radiator) or, in particular, a DML (Distributed Mode Loudspeaker). This type of transducer can be relatively flat and therefore relatively easily positioned in the recess of the support structure. In combination with the support structure, this can also result in relatively good, if not very good, acoustic properties of the baffle.

[0014] For relatively good, if not very good, acoustic properties, the material of the support structure is at least partially, preferably largely, air-permeable and at least partially, preferably largely, sound-absorbing.

[0015] Preferably, the material of the supporting structure is such that it absorbs sound at least in a frequency range above 50 Hz, particularly above 90 Hz, and / or with an absorption coefficient of α > 0.5, preferably α > 0.8. The emission of sound at frequencies lower than approximately 50 or 90 Hz can be influenced, for example, by the use of sound absorbers, such as those known to those skilled in the art, e.g., as panel resonators. Further sound absorbers can, for example, be attached to the rear, i.e., the second surface of the baffle, or integrated into the frame.

[0016] The sound-absorbing properties of the support structure can be adjusted, for example, by choosing the material or adjusting its thickness. Expanded glass, PET, or a combination of these materials are preferred materials for the support structure itself.

[0017] The thickness of the support structure is preferably between 15 mm and 100 mm. This results in relatively favorable acoustic properties, while the sound baffle according to the invention remains relatively easy to transport.

[0018] The sound baffle according to the invention is not only intended to emit sound, in particular music or speech, by means of the sound transducer, but is also specifically intended for visual display. For this purpose, the sound baffle according to the invention comprises the layer arranged on the first surface of the support structure. The layer is designed such that it is completely arranged on the first surface, i.e., it also covers the first surface of the support structure in the area of ​​the recess.

[0019] The layer is at least partially permeable to sound, i.e., at least partially sound-transparent, preferably as sound-transparent as possible, so that the sound transducer arranged in the recess of the support structure can radiate its sound through the layer as unhindered as possible, i.e., is distorted as little as possible by the layer.

[0020] This is achieved in particular by making the layer as thin as possible, e.g., less than 3 mm thick, or between 0.1 mm and 3 mm thick. The thickness of the layer can influence its sound transmission.

[0021] For relatively good, if not very good, acoustic properties, the layer should be as non-sound-hard as possible.

[0022] According to one embodiment of the sound baffle according to the invention, the layer is designed as a projection surface for projecting an image. Suitable materials for such a layer include, for example, cellulose plaster, a relatively thin laminate layer, or PET fabric. Such a layer can, for example, be applied to the support structure after the latter has been provided with the recess. However, it is also possible for this layer to be applied to the support structure before the recess is created.

[0023] The color of the layer can be adjusted and, if necessary, optimized for the intended projection environment or type.

[0024] Alternatively, the layer can be an imaging layer, meaning it is configured to actively display an image or a series of images. This can be achieved, for example, by using QLEDs, OLEDs, or LCDs in the imaging layer, which are either woven into or adhered to a fabric.

[0025] The frame and the material of the support structure are connected. The material of the support structure can, for example, be entirely contained within the frame. In this case, the layer preferably extends over the frame. However, the material of the support structure can also extend above the frame and then be flush with its sides.

[0026] According to one embodiment of the sound baffle according to the invention, the recess in the support structure is designed as a continuous opening that completely covers the layer. This opening can, for example, be cut into the support structure.

[0027] According to an alternative embodiment of the sound baffle according to the invention, the support structure in the area of ​​the recess is designed as an indentation accessible from the second surface of the support structure. The thickness of this indentation in the area of ​​the first surface is significantly reduced compared to the thickness of the remaining support structure, so that the transducer is able to radiate its sound at least partially through this part of the support structure and the layer. The indentation can be produced, for example, by milling, leaving a layer of the support material intact. The cutout or milling is preferably slightly larger than the transducer in order to prevent, or at least reduce, any direct vibration transmission between transducers.

[0028] Due to the relatively thin layer and the possibility of mounting the transducer directly behind it, it is possible to reduce or even prevent depth shift during image reproduction. This depth shift, which leads to a difference between the viewing angle of the image and the angle to the sound-radiating surface of the transducer, is particularly important in the transverse plane (hearing in the horizontal plane), as deviations are most easily audible in this plane.

[0029] The sound baffle according to the invention preferably has a relatively shallow structural depth.

[0030] The deflection of the transducer's diaphragm, corresponding to an airflow, or the transducer's housing, should cause the supporting structure to vibrate as little as possible, or not at all, in order to ensure undisturbed image reproduction with different projector lenses. This can be achieved, for example, by a sufficiently rigid frame design.

[0031] The first surface can be planar or curved, in particular continuously curved, preferably doubly curved or doubly continuously curved. This makes it possible, in particular, to provide a curved, especially a doubly curved, projection surface or imaging surface. The curved version, in particular, can be manufactured relatively easily due to the support structure, thus enabling different image reproductions.

[0032] According to one embodiment of the sound baffle according to the invention, the support structure comprises several plate-shaped support structure segments arranged side by side in order to form at least an approximately curved first surface. Preferably, the layer is then designed such that it forms a continuously curved, preferably a doubly continuously curved, projection surface.

[0033] The first surface facing the layer can, for example, be milled in such a way that the individual support structure segments assume a curved, preferably doubly curved, shape. In the case of the imaging layer, this can also be designed in such a way that it is able to display a curved, in particular a doubly curved, image.

[0034] As already mentioned, the invention relates to the modular sound baffle device comprising several sound baffles designed as sound baffle modules according to the invention. The individual sound baffle modules are arranged side by side, e.g., fastened side by side by means of fastening means, so that the layers of the sound baffle modules together form the total projection surface or the image-forming layer for displaying an image. Due to the modularity, sound baffle devices of different sizes and / or different designs can be assembled.

[0035] According to a variant of the modular baffle device according to the invention, this device comprises at least one transducer-free module, which includes a further frame, a further support structure (in particular without a recess), the material of which corresponds to the material of the support structure of the baffle modules, and a further layer applied over the entire surface of the further support structure, corresponding to the layer of the baffle modules, such that the transducer-free module and the baffle modules together are able to form the modular baffle device. The transducer-free module therefore does not include a transducer.

[0036] In particular, the individual baffle modules and, if applicable, the transducer-free modules can have different sizes and shapes (planar, single and double curved). A frame substructure can be used to achieve the different shapes.

[0037] To achieve continuity in simple and double curves, a support material that is not sufficiently flexible can be segmented to obtain plate-shaped support structure segments. These are then connected to each other and inserted into the frame. The frame substructure can also be used to approximate the curvature and maintain the shape of the segmented support structure. Exact continuity can then be achieved by applying a layer of varying thickness to compensate for the discontinuities of the segmentation.

[0038] The baffle or baffle module can contain a single transducer or multiple transducers. If the baffle or baffle module contains multiple transducers, it can have several corresponding cutouts. It is also possible for two or more transducers to be arranged in a single cutout.

[0039] The layer can be printed for applications where image reproduction is not desired or necessary. The system can therefore also be designed as a purely absorbent, modular freeform system. Cutouts are possible (e.g., for doors), and the doors can be designed as independent modules.

[0040] The modules can be combined to form various shapes (e.g., cuboids, domes, amorphous walls). The modules can be connected either directly or via a load-bearing primary structure (e.g., in large installations or under high static loads, such as flying trusses).

[0041] The modular design of the baffle system allows for both permanent and temporary installations, as the modules are reusable and can be freely combined with each other. This also reduces the CO2 footprint of such installations.

[0042] The combination of freeform shapes and the described absorbing, (electro-)acoustic, and image-reproducing properties of the modules allows for the realization of any wall shape (planar, amorphous, etc.) and cubic forms (cuboids, cylinders, domes, etc.) without adverse acoustic effects such as flutter echoes. In spaces constructed in this way, adaptive / immersive / 3D acoustics can be combined with frontal or, in particular, 360° image reproduction (e.g., immersive theaters / concert halls, simulation rooms, planetariums, etc.).

[0043] Exemplary embodiments of the invention are shown in the accompanying schematic figures. These show: Fig. 1. A first version of a sound baffle in an exploded view, Fig. 2 a side view of the baffle of the Fig. 1 in cutaway view, Fig. 3 an alternative design of the sound baffle of the Fig. 1 in cutaway view, Fig. 4 a second version of a sound baffle in an exploded view, Fig. 5 a side view of the baffle of the Fig. 4 in cutaway view, Fig. 6 an alternative design of the sound baffle of the Fig. 4 in cutaway view, Fig. 7a, Fig. 7b an embodiment of a sound baffle with a simply curved surface in perspective view, Fig. 8 An embodiment of a sound baffle with a doubly curved surface in perspective view, and Fig. 9 - 14 modular sound baffle devices with several sound baffle modules designed as sound baffles.

[0044] The Fig. Figure 1 shows a first embodiment of a sound baffle 1a in an exploded view and the Fig. Figure 2 shows a side view of the baffle 1a in a cutaway view. Fig. Figure 3 shows an alternative design of the sound baffle 1a in a cutaway view.

[0045] The sound baffle 1a comprises a plate-shaped support structure 2 made of a material that is at least partially air-permeable and at least partially sound-absorbing, a frame device 3, a sound transducer 4 and a layer 5.

[0046] The plate-shaped support structure 2 comprises a first surface 2a, on which the layer 5 is applied or attached, and a second surface 2b facing away from the first surface 2a, which in particular forms the back of the sound baffle 1a.

[0047] The support structure 2 is arranged or attached to the frame device 3. In the present embodiment, the frame device 3 completely surrounds the support structure 2, and the layer 5 extends over the frame device 3 in such a way that it is flush with the frame device 3.

[0048] The frame device 3 is made of, for example, wood, plastic or metal, such as aluminum.

[0049] The frame device 3 is preferably self-supporting and is in particular stable enough to support the mass of the support structure 2, the sound transducer 4 and the layer 5.

[0050] The sound baffle 1a is particularly rectangular and has, for example, side lengths of 0.6m to 3.0m.

[0051] In the present embodiment, the material of the plate-shaped support structure 2 is such that it absorbs sound at least in a frequency range above 50 Hz, in particular above 90 Hz, and / or with an absorption coefficient of α > 0.5, preferably α > 0.8. The emission of sound at frequencies lower than approximately 50 or 90 Hz can be influenced, for example, by the use of sound absorbers (not shown), such as those known to those skilled in the art, for example, as plate resonators. Further sound absorbers can, for example, be attached to the rear, i.e., the second surface 2b, or integrated into the frame structure 3.

[0052] The sound-absorbing properties of the support structure 2 can be adjusted, for example, by choosing the material or by adjusting the thickness of the support structure 2. In the present embodiment, expanded glass or PET or a combination of these materials will be used.

[0053] In the present embodiment, the thickness of the support structure 2 is between 15mm and 100mm.

[0054] The support structure 2 includes a recess 2c in which the sound transducer 4 is arranged, or, in the present embodiment, attached to the support structure 2. However, it is also possible for the sound transducer 4 to be attached to the frame device 3. For this purpose, the frame device may include, for example, a transverse or longitudinal strut (not shown).

[0055] The sound transducer 4 is, for example, a sound transducer based on the principle of beamforming or beam steering. In the present embodiment, the sound transducer 4 is a BMR (Balanced Mode Radiator) sound transducer or preferably a DML (Distributed Mode Loudspeaker) sound transducer.

[0056] The recess 2c can, for example, be designed as an opening 22, as shown in the Fig. Figure 2 is shown. In this case, layer 5 extends over opening 22.

[0057] Layer 5 is at least partially permeable to sound, so that the sound transducer 4 is able to radiate the sound it generates through layer 5.

[0058] The recess 2c can also be designed as a recess 32, as shown in the Fig. Figure 3 illustrates this. In this case, the thickness of the support structure 2 in the area of ​​the recess 2c or indentation 32 is less than the remaining thickness of the support structure 2, so that the sound transducer 4 is able to radiate the sound it generates through the support structure 2 in the area of ​​the recess 2c or indentation 32 and through the layer 5. The indentation 32 is accessible via the back of the baffle 1a or via the second surface 2b of the support structure 2.

[0059] In the present embodiment, the sound baffle 1a is not only intended to emit sound, in particular music or speech, by means of the sound transducer 4, but is also intended for a visual display. For this purpose, the sound baffle 1a comprises the layer 5 arranged on the first surface 2a of the support structure 2. The layer 5 is designed in such a way that it is completely arranged on the first surface 2a, i.e., it also covers the first surface 2a of the support structure 2 in the area of ​​the recess 2c.

[0060] Layer 5 is made as thin as possible and, for example, has a thickness of less than 3 mm. In the present embodiment, layer 5 is as acoustically reflective as possible.

[0061] In the present embodiment, layer 5 forms a projection surface for projecting an image and is made, for example, of a cellulose plaster, a relatively thin laminate layer, or a PET fabric.

[0062] The color of layer 5 can be adjusted and, if necessary, optimized for the intended projection environment or type.

[0063] Alternatively, layer 5 is an imaging layer, meaning it is configured to actively display an image or a series of images. In the present embodiment, this is achieved by having layer 5, configured as an imaging layer, comprise QLEDs, OLEDs, or LCDs that are, for example, woven into or adhered to a fabric.

[0064] The Fig. Figure 4 shows a second embodiment of a sound baffle 1b in an exploded view and the Fig. Figure 5 shows a side view of the baffle 1b in a cutaway view. Fig. Figure 6 shows an alternative design of the sound baffle 1b in a cutaway view.

[0065] The in the Fig. 4, Fig. 5 to Fig. The sound baffle shown in section 6, 1b, differs essentially from the one shown in the Fig. 1, Fig. 2 to Fig. 3 shown sound baffle 1a by the fact that the support structure 2 overlaps the frame device 3 on the front and runs flush with the frame device 3 on the sides.

[0066] The support structure 2 of the in the Fig. The variant of the sound baffle 1b shown in Figure 5 comprises the recess 2c designed as an opening 22 and the support structure 2 of the Fig. The variant of the sound baffle 1b shown in 6 includes the recess 2c designed as a recess 32.

[0067] In the in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. In the 6 shown embodiments, the first surfaces 2a and thus the projection surfaces or the image-forming layers of the sound baffles 1a, 1b are planar.

[0068] The first surface 2a or layer 5 can also be curved, in particular doubly curved.

[0069] The Fig. 7a and Fig. Figure 7b shows an embodiment of a sound baffle 1c with a curved first surface 2a in perspective view. The curved first surface 2a is, in particular, simply curved. Fig. 7a shows the front and the Fig. Figure 7b shows the rear view of the baffle 1c.

[0070] The frame device 3 of the in the Fig. 7a, Fig. The sound baffle 1c shown in 7b is manufactured with a frame substructure, so that in the case of the present embodiment the frame device 3 comprises several bent or curved cross struts 3a.

[0071] The Fig. Figure 8 shows another embodiment of a sound baffle 1d. This differs essentially from those shown in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. 6 sound baffles 1a, 1b shown, in that the support structure 2 comprises several adjacent, plate-shaped support structure segments 82 to form at least an approximately curved, in particular doubly curved, first surface 1a.

[0072] In the present embodiment, layer 5 can be configured to form a curved, preferably doubly curved, optionally continuously curved or doubly continuously curved projection surface. The imaging layer can also be configured to display a curved, in particular a doubly curved, image.

[0073] The in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. The 8 sound baffles 1a, 1b, 1c, 1d shown can be designed as transducer modules, such that several transducer modules arranged side by side form a sound baffle device. The individual sound baffle modules are arranged next to each other, e.g., attached side by side by means of fasteners, so that the layers 5 of the sound baffle modules together form a total projection surface or an image-forming layer for displaying an image. Due to the modularity, sound baffle devices of different sizes and / or different designs can be assembled.

[0074] The Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13 to Fig. Figure 14 shows examples of such sound baffle devices 90, each comprising several sound baffles 1a to d designed as sound transducer modules 91. The sound baffle devices 90 can also have at least one sound transducer-free module 92, which includes a further frame device, a further support structure, in particular without a recess, the material of which corresponds to the material of the support structure 2 of the sound baffle modules, and a further layer, corresponding to layer 5 of the sound baffle modules 91, applied over the entire surface of the further support structure, such that the sound transducer-free module 92 and the sound baffle modules 91 together are able to form the modular sound baffle device.

[0075] In particular, the individual baffle modules 91 and, if applicable, the transducer-free modules 92 can have different sizes and shapes (planar, single and double curved). A frame substructure can be used to achieve the different shapes.

[0076] The one in Fig. The modular sound transducer device 90 shown in Figure 9 comprises, for example, six sound baffle modules 91, which, for example, correspond to the specifications in the Fig. The sound baffles 1a, 1b shown are 1 to 3 or 4 to 6.

[0077] The one in Fig. The modular sound transducer device 90 shown in section 10 comprises, for example, several sound baffle modules 91, which, for example, correspond to the specifications in the Fig. The system consists of sound baffles 1a, 1b (1 to 3 or 4 to 6 as shown) and several transducer-less modules 92. In particular, this is a room to whose walls the sound transducer device 90 is attached. The room can be entered via a door 100. The door 100 can also be equipped with a sound baffle module 91 or with a transducer-less module 92.

[0078] The one in Fig. The modular sound transducer device 90 shown in section 10 comprises, for example, several sound baffle modules 91, which, for example, correspond to the specifications in the Fig. 7a, Fig. 7b or Fig. The 8 illustrated sound baffles 1c, d are executed.

[0079] The one in Fig. The modular sound transducer device 90 shown in 11 comprises, for example, several sound baffle modules 91, which, for example, correspond to the ones shown in the Fig. 7a, Fig. 7b or Fig. The 8 illustrated sound baffles 1c, d are designed. This sound baffle device 90 has the form of an amorphous wall with passages.

[0080] The one in Fig. The modular sound transducer device 90 shown in Figure 12 comprises, for example, several sound baffle modules 91, which are arranged, for example, according to the specifications in the Fig. 7a, Fig. The sound baffle 1c shown in 7b is designed as follows. This sound baffle device 90 has the shape of a partial cylinder.

[0081] The one in Fig. The modular sound transducer device 90 shown in 13 comprises, for example, several sound baffle modules 91, which, for example, correspond to the ones shown in the Fig. 7a, Fig. 7b or Fig. The 8 illustrated sound baffles 1c, d are designed. This sound baffle device 90 is dome-shaped.

[0082] The one in Fig. The modular sound transducer device 90 shown in 14 comprises, for example, several sound baffle modules 91, which, for example, correspond to the ones shown in the Fig. 7a, Fig. 7b or Fig. The sound baffles 1c, d shown in the illustrations are designed as follows. This sound baffle device 90 is dome-shaped in its upper region and cylindrical in its lower region.

[0083] If the layers 5 are designed as projection surfaces, then the sound baffles 1a to 1d or the sound baffle devices 90 can be connected with a [missing information] in the Fig. 9 projector 93 shown for projecting a series of images onto the projection surface or the total projection surface, and combined with a control device 94 connected to and controlling the sound transducer 4 or the sound transducers 4 and the projector 93, so that the sound emitted by the sound transducer 4 or the sound transducers 4 is synchronous with the series of images.

[0084] If the layers are 5 imaging layers, then the sound baffles 1a to 1d or the sound baffle devices 90 can be used with one in the Fig. The control device 60 shown in Figure 6 is combined with the imaging layer(s) and the sound transducers 4 or the sound transducers 4 in such a way that the sound emitted by the sound transducer 4 or the sound transducers 4 is synchronous with a series of images displayed by the imaging layer or the imaging layers. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 1 078 300 B1

[0002]

Claims

[1] Baffle, comprising: - a plate-shaped support structure (2) made of a material that is at least partially air-permeable and at least partially sound-absorbing, which has a first surface (2a), a second surface (2b) facing away from the first surface (2a), a thickness, and a recess (2c), - a frame structure (3) to which the support structure (2) is attached, - a layer (5) applied over the entire surface of the first surface (2a) of the support structure (2), which is at least partially sound-transparent and which in particular forms a projection surface for projecting an image or which is an imaging layer for displaying an image, and - a sound-generating transducer (4) arranged in the recess (2c) behind the layer (5), which is able to radiate the sound through the layer (5). [2] Sound baffle according to claim 1, wherein the material of the support structure (2) absorbs sound at least in a frequency range above 50 Hz, preferably above 90 Hz. [3] Baffle according to claim 1 or 2, wherein the material of the support structure (2) absorbs sound with a sound absorption coefficient α > 0.5, preferably α > 0.

8. [4] Baffle according to one of claims 1 to 3, wherein the thickness of the support structure (2) is between 15mm and 100mm. [5] Baffle according to any one of claims 1 to 4, wherein the material of the support structure (2) comprises expanded glass or PET or a combination of these materials. [6] Baffle according to one of claims 1 to 5, wherein the recess (2c) of the support structure (2) is designed as an opening (22) and the layer (5) extends over the opening (22), or the recess (2c) of the support structure (2) is designed as an indentation (32), such that the thickness of the support structure (2) in the area of ​​the indentation (32) is less than the remaining thickness of the support structure (2), so that the sound transducer (4) is able to radiate the sound it generates through the support structure (2) in the area of ​​the indentation (32) and through the layer (5). [7] Sound baffle according to any one of claims 1 to 6, wherein the layer (5) is designed as a cellulose plaster, as a laminate layer, or as a fabric made of PET, and / or the layer (5) has a thickness between 0.1mm and 3mm. [8] Baffle according to one of claims 1 to 6, wherein the layer (5) forming the imaging layer comprises QLEDs, OLEDs or LCDs, which are in particular woven into or glued onto a fabric. [9] Baffle according to one of claims 1 to 8, wherein the recess (2c) of the support structure (4) is designed as a continuous opening (22) that completely covers the layer (5), or wherein the support structure (2) in the area of ​​the recess (2c) is designed as an indentation (32) accessible from the second surface (2b) of the support structure (2), the thickness of which in the area of ​​the first surface (2a) is significantly reduced compared to the thickness of the remaining support structure (2), so that the sound transducer (4) is able to radiate its sound at least partially through this part of the support structure (2) and the layer (5). [10] Baffle according to any one of claims 1 to 9, wherein the first surface (2a) is planar or curved, in particular doubly curved. [11] Baffle according to one of claims 1 to 10, wherein the support structure (2) has several adjacent, plate-shaped support structure segments (82) to form at least an approximately curved first surface (2a), and in particular the layer (5) is designed such that it forms a curved projection surface. [12] Modular sound baffle device comprising several sound baffles (1a-d) designed as sound baffle modules (91) according to one of claims 1 to 11, which are arranged next to each other, in particular in a matrix-like manner, to form the modular sound baffle device (90) and in particular the layers (5) of the sound baffle modules (91) together form a total projection surface or an imaging layer for displaying an image. [13] Modular sound baffle device according to claim 12, comprising at least one transducerless module (92) which includes a further frame device, a further support structure whose material corresponds to the material of the support structure of the sound baffle modules, and a further layer applied over the entire surface of the further support structure corresponding to the layer of the sound baffle modules, such that the transducerless module (92) and the sound baffle modules together are able to form the modular sound baffle device. [14] Device comprising a sound baffle according to one of claims 1 to 11 or a modular sound baffle device according to claim 12 or 13, a projector (93) for projecting a series of images onto the projection surface, and a control device (94) connected to and controlling the sound transducer (4) or the sound transducers (4) and the projector (93), such that the sound emitted by the sound transducer (4) or the sound transducers (4) is synchronous with the series of images. [15] Device comprising a sound baffle according to one of claims 1 to 11 or a modular sound baffle device according to claim 12 or 13, wherein the layer (5) or layers (5) is / are configured as an imaging layer or as imaging layers, and a control device (60) connected to the sound transducer (4) or the sound transducers (4) and the imaging layer or layers, which is configured to control the sound transducer(s) (4) and the imaging layer or layers such that the sound emitted by the sound transducer(s) is synchronous with a series of images displayed by the imaging layer or layers.

Images