Damping device and loudspeaker damping system for a motor vehicle

Description

[0001] The invention relates to a damping device, in particular for damping acoustic vibrations, such as those of a loudspeaker. Furthermore, the invention relates to a loudspeaker damping system comprising a damping device according to the invention, as well as to a motor vehicle comprising a damping device according to the invention and / or a loudspeaker damping system according to the invention.

[0002] Foam elements are used in a wide variety of applications to dampen vibrations, particularly acoustic vibrations. Among other things, foams are used in motor vehicles to dampen engine noise, road noise, or general exterior noise so that they do not penetrate the passenger compartment or are only significantly attenuated. Various implementations are known for the integration of foam components in motor vehicles.

[0003] For example, DE 100 16 758 A1 shows a motor vehicle door. An insulating element in the form of a foam layer is arranged between the outer wall of the motor vehicle door and the inner wall. The foam layer is clamped between the outer and inner walls. For this purpose, the outer and inner walls form a clamping area, which includes a variably designed undercut that engages with the foam layer. The foam layer has a thickened portion in the clamping area.

[0004] DE 10 2005 009 179 A1 also shows a motor vehicle door in which a modular component is arranged between the outer shell and the interior door panel. A sealing film in the form of a molded foam part is arranged between the outer shell and the modular component. This serves to provide sound insulation and to separate the vehicle door into a wet and a dry area. The molded foam part is also clamped in place.

[0005] DE 10 2006 052 900 A1 discloses a sound-absorbing component for covering parts or specific components of a motor vehicle engine. This component comprises, at least in sections, a foam body. The foam body is attached to a plastic cover by means of undercuts or is foamed onto it. DE 10 2006 052 900 A1 discloses a concrete implementation of this in the form of mushroom-shaped elements that are clipped into the foam body.

[0006] DE 102 20 536 C1 shows another solution according to the state of the art.

[0007] In addition to the general acoustic decoupling of the passenger compartment from disruptive vehicle or exterior noise, foamed bodies can also be used to dampen sound waves only in specific propagation directions. This is important, for example, in connection with loudspeakers, which are typically found in vehicle doors. The goal here is not to dampen the sound waves in the desired direction of propagation, namely into the passenger compartment, but to achieve maximum dampening in all other directions. Last but not least, it should be avoided that the sound waves excite other components to vibrate, which could generate unwanted interference or background noise. Especially in the area of ​​loudspeakers, the state of the art is to glue corresponding foamed bodies into a mount. This approach is associated with disadvantages with regard to processing times, environmental friendliness, and occupational safety.Another typical method involves clamping the foam body using special geometries. However, such a connection can easily be broken, for example, by vibrations, so that the foam body can potentially be lost during transport of the structural unit containing the foam body. If this goes unnoticed during the subsequent assembly process, considerable rework costs arise.

[0008] The present invention is based on the object of providing a damping device, a loudspeaker damping system and a motor vehicle in which an optimal influence on the sound waves of a loudspeaker can be realized in a simple and cost-effective manner.

[0009] The object is achieved according to the invention by a damping device according to claim 1 and by a loudspeaker damping system according to claim 7. Advantageous embodiments of the damping device are set forth in subclaims 2-6. In addition, a motor vehicle according to claim 8 is provided, which comprises at least one damping device according to the invention and / or one loudspeaker damping system according to the invention.

[0010] A first aspect of the invention is a damping device, in particular for damping acoustic vibrations of a loudspeaker, comprising a receiving device for receiving a foam body. The receiving device delimits, at least in part, a receiving space for receiving the foam body. Furthermore, the damping device according to the invention comprises a foam body for arrangement on or in the immediate vicinity of a loudspeaker. The foam body is arranged in the receiving space of the receiving device and a projection protruding in the direction of the respective other element is arranged or formed on at least one of the two elements, foam body and receiving device. This projection engages in a recess in the respective other element, such that the foam body is fixed in the receiving space of the receiving device in a form-fitting and / or force-fitting manner.

[0011] The projection is arranged on a lateral boundary wall of the receiving device that delimits the receiving space, and the foam body is arranged adjacent to the lateral boundary wall in an arrangement plane, so that the projection projects into the foam body, deforming it.

[0012] A foam body is understood to be a body made of a foamed material, typically a foamed plastic. It is not excluded that elements made of a different material may be foamed into the foamed material of the foam body and / or connected to it by means of another form-fitting and / or force-fitting connection.

[0013] The receiving device serves to receive the foam body. This means that the foam body is received or can be received in a receiving space which is at least partially delimited by the receiving device, in particular by boundary walls of the receiving device. On the other hand, the receiving device serves to position the foam body in the immediate vicinity of a loudspeaker or in contact with this loudspeaker. The receiving device serves in particular to arrange the foam body directly on the loudspeaker and is designed for arrangement on a panel, in particular an interior panel of a motor vehicle door, and is expediently equipped with corresponding fastening areas for attachment to the panel.

[0014] The projection is arranged or formed between opposite or adjacent sides of the receiving device and the foam body. The projection can form a structural unit with the element on which it is arranged. Alternatively, the projection can be a component that is mechanically connected to the respective element.

[0015] In other words, a hook element is formed by means of the projection, which serves as a fixing device between the receiving space of the receiving device and the foam body.

[0016] To form the damping device, the receiving device and the foam body are joined together in a single joining process. The foam body is introduced into the receiving space along, in particular parallel to, at least one boundary wall of the receiving device. In this way, the receiving device and the foam body are arranged essentially next to one another in an arrangement plane. Due to the spatial configuration of the receiving device and the foam body, this arrangement plane can also be formed by a volume defined by two mutually parallel boundary planes that extend at an angle to the boundary walls and delimit the foam body and the receiving device or its receiving space.

[0017] The joining direction is essentially perpendicular to the assembly plane. During the joining process, the projection engages a recess.

[0018] The projection engages in a recess of the respective other element, whereby the recess may also be created by the engagement. Likewise, the respective other element may already have a recess. In particular, the projection arranged on the receiving device engages in pores of the foam body.

[0019] The damping device according to the invention realizes a force-fitting and / or form-fitting connection between a foam body and a receiving device for a foam body in a simple and cost-effective manner.

[0020] In other words, at least one lateral boundary wall of the receiving device forms at least one projection that extends into the foam body and at least partially deforms it in the region of engagement. It cannot be ruled out that the deformation is at least partially irreversible.

[0021] The foam body is arranged adjacent to said lateral boundary wall of the receiving device in the arrangement plane. Advantageously, the facing sides of the respective elements touch each other at least in some areas.

[0022] In the sense of the invention, the receiving space is a space which is defined at least partially by lateral boundaries of the receiving device and by an upper boundary plane parallel to the arrangement plane and a lower boundary plane opposite thereto, wherein the boundary planes do not have to be formed by a wall, but delimit the receiving space in particular ideally.

[0023] The material of the receiving device is less elastic and / or more rigid than the foam body. Typically, the receiving device is a plastic part produced using an injection molding process. Preferably, the receiving device is made of polypropylene (PP) or acrylonitrile-butadiene-styrene copolymer (ABS).

[0024] Typically, the receiving device comprises at least two lateral boundary walls or at least sections of a lateral boundary wall, which are not arranged in one plane, advantageously substantially opposite one another. The at least partially elastic foam body is dimensioned in relation to the receiving device such that, when arranged as intended in the receiving device, it is in contact with the boundary walls and the restoring forces of the foam body press it against the boundary walls of the receiving device. An elastic restoring force of the foam body also causes the projection to exert constant pressure on the foam body, so that in addition to a positive fixation due to the engagement of the projection in the foam body or in the depression thereby created in the foam body, a friction-induced force connection between the projection and the foam body is also realized.

[0025] The main advantage of this design is that the projection engages with the foam body. This creates a force-locking and form-fitting connection between the foam body and the receiving device in a particularly simple, i.e., particularly easy-to-install manner.

[0026] In a specific embodiment, the foam body is arranged on a side of a lateral boundary wall facing away from a central region of the receiving device. In the case of an annular boundary wall, this means that the foam body is arranged on the outer circumference of the annular boundary wall.

[0027] In another specific embodiment, the foam body is arranged on a side of a lateral boundary wall facing away from a central region of the receiving device. In the case of an annular boundary wall, this means that the foam body is arranged on the inner circumference of the annular boundary wall.

[0028] In a further specific embodiment, the foam body is arranged between two boundary walls which, for example, form a groove into which the foam body is inserted.

[0029] In a further embodiment of the damping device according to the invention, the edges of the projection form a first acute angle in a first plane, at least in an end region facing the foam body. The first plane is aligned along the longitudinal extension of the projection and substantially perpendicular to the lateral boundary wall of the receiving space, as well as substantially perpendicular to the arrangement plane.

[0030] In other words, in a section through the damping device, the projection forms a tip in a plane that is spanned perpendicular to the lateral boundary wall and arrangement plane and runs through the projection, which tip projects at least partially into the foam body.

[0031] The end region of the projection is, for example, the last tenth in the direction of the length of the projection, although it cannot be ruled out that the projection also forms an acute angle over its entire length.

[0032] In the case of a curved boundary wall, the plane is to be understood as perpendicular to the tangent to the boundary wall, which runs at right angles to the length of the projection.

[0033] An acute angle is understood to be an angle of less than 90°. The angle is preferably less than 70°, particularly preferably less than 60°. In this way, the projection forms a wedge tapering toward the foam body, at least in its end region.

[0034] Due to the pointed shape of the projection in this first level, the projection can penetrate the foam body particularly well.

[0035] In a further embodiment of the damping device according to the invention, the body edges of the projection form a second acute angle in a second plane, at least in an end region facing the foam body. The second plane is aligned along the longitudinal extension of the projection and substantially perpendicular to the lateral boundary wall of the receiving space, as well as substantially parallel to the arrangement plane.

[0036] In other words, the projection or its body edges advantageously also form an acute angle in a second plane perpendicular to the first plane, which also extends along the length of the projection. This second acute angle is also formed at least in the end region of the projection, although it is also possible for the second acute angle to be formed over the entire length of the projection.

[0037] Starting with a rectangular base area of ​​the projection, which is essentially the area where the projection adjoins the lateral boundary wall, the projection essentially has a pyramidal shape, although not all body edges necessarily form the same angle. Starting with a round or oval base area, the projection essentially has the shape of a cone or a spike.

[0038] A projection designed in this way penetrates particularly well into the foam body, especially into the pores of a foam body, in order to form a positive and non-positive connection.

[0039] In a further embodiment of the damping device according to the invention, several projections are arranged at least on one lateral boundary wall of the receiving space.

[0040] In this embodiment, the damping device comprises at least two projections, which are advantageously—but not necessarily—arranged opposite one another. Several projections can also be arranged in groups, where a group of projections means that two or more projections are arranged closer together than the projections adjacent to the group. Preferably, the projections or groups of projections are distributed regularly, in particular equidistantly, on the lateral boundary wall to which the foam body is arranged adjacent. Within the meaning of the invention, "regular" means that their distribution follows an algorithm and is not random.

[0041] The projections on the lateral boundary wall defining the receiving space are distributed in at least one plane substantially parallel to the arrangement plane. It is also possible for projections to be arranged in several parallel planes.

[0042] In a specific embodiment, the foam body is preferably annular. The receiving device forms a hollow shape compatible with the shape of the foam body as a receiving space. When the foam body is arranged as intended in the receiving device, projections are arranged at regular intervals on at least one, preferably both, lateral boundary walls to which the foam body is adjacent, so that projections extend into each of two opposite sides of the foam body.

[0043] Other shapes of the foam body and compatible designs of the receiving space are not excluded.

[0044] The advantage of multiple projections is better mechanical fixation of the foam body in the receiving space.

[0045] In a further embodiment of the damping device according to the invention, a recess is arranged opposite the projection to facilitate demolding of the receiving device from a casting mold. The recess is arranged in a base surface of the receiving device that is arranged substantially parallel to the arrangement plane and defines a support plane at least in sections.

[0046] The base surface can be curved. In particular, the base surface can be adapted to the shape of the opposite side of the foam body.

[0047] The joining process takes place toward the floor surface. The floor surface acts as a support surface in certain sections, particularly during the joining process. The floor surface limits the joining process, although the foam body does not necessarily have to remain permanently in contact with the floor surface after the joining process in the damping device.

[0048] The recess primarily serves to manufacture the receiving device and its removal from a mold. The receiving device is preferably an injection-molded part that can be manufactured cost-effectively using a simple open-close tool. The recesses are located below the projections, eliminating the need for a slider, which is required to create an undercut.

[0049] It cannot be ruled out that the receiving device is a multi-component component into which, for example, fastening means and / or stiffening elements made of a different material are injected. In particular, it is possible that the projections of the damping device according to the invention are injected into the component.

[0050] In a further embodiment of the damping device according to the invention, the side of the projection facing away from a bottom surface of the receiving device arranged substantially parallel to the arrangement plane forms an obtuse angle with the lateral boundary wall on which the projection is arranged in order to facilitate the insertion of the foam body into the receiving space.

[0051] In other words, an obtuse angle is formed between the lateral boundary wall and the projection in the first plane. An obtuse angle is understood to be an angle of more than 90°, with the angle preferably being greater than 110°, particularly preferably greater than 130°.

[0052] Insertion into the receiving space is advantageously carried out essentially perpendicular to the assembly plane, toward the floor surface. During the joining process, the foam body can slide along the edges or surfaces of the projection that form the obtuse angle. This deforms the foam body but essentially leaves it undamaged.

[0053] This minimizes the risk of injury when handling the receiving device, especially when manually installing the foam body into the receiving device, as the tip of the projection is directed away from the installer. Furthermore, inserting the foam into the receiving device is facilitated and at least partially prevents it from slipping out in the opposite direction of insertion.

[0054] In a further embodiment of the damping device according to the invention, the side of the projection facing a base surface of the receiving device arranged substantially parallel to the arrangement plane forms an acute angle with the lateral boundary wall on which the projection is arranged in order to realize an undercut which counteracts a removal of the foam body from the receiving space.

[0055] In other words, removal of the foam body, especially unintentional removal, is blocked by the undercut formed at an acute angle.

[0056] This ensures that the foam body cannot be lost unnoticed during transport of the damping device between two assembly stations. A missing foam body that goes unnoticed during further assembly can potentially result in significant rework, which can be largely avoided with this design.

[0057] In a further embodiment of the damping device according to the invention, the compression set of the material of the foam body is less than 15%, preferably less than 10%, particularly preferably less than 5%.

[0058] Furthermore, the compressive strength of the foam body material is preferably 4 + / - 2 kPa, particularly preferably 4 + / - 1 kPa. Compressive strength is a measure of the strength of foams and is determined according to DIN EN ISO 3386-1. It determines the force required to compress a test specimen by 40% of its original height.

[0059] Preferably, the material of the foam body is essentially foamed polyurethane, although another foamable plastic is not excluded.

[0060] Advantageously, the foam body has no so-called skin, particularly on the side where the positive and / or non-positive connection is formed. In other words, the foam body is open-pored on the side facing the projection.

[0061] The bulk density of the foamed material from which the foam body is essentially formed is, measured according to DIN EN ISO 845, preferably 28 + / - 10 kg / m 3< , particularly preferably 28 + / - 5 kg / m 3< .

[0062] The elongation at break of the foamed material from which the foam body is essentially formed is preferably more than 100%, as determined according to DIN EN ISO 1798.

[0063] The tensile strength of the foamed material from which the foam body is essentially formed is determined according to DIN EN ISO 1798 preferably more than 70%, particularly preferably more than 80%.

[0064] A second aspect of the invention is a loudspeaker damping system comprising a damping device according to the invention and a loudspeaker which is at least partially surrounded by the foam body in a peripheral region.

[0065] A further component of the loudspeaker damping system can be a panel, such as a door panel, on the inside of which, facing away from the passenger compartment, a damping device according to the invention is arranged or formed.

[0066] In particular, the speaker penetrates at least partially into the foam body with a peripheral region, thereby deforming the foam body. The peripheral region of the speaker penetrates at least 1 mm, preferably at least 2 mm, and particularly preferably at least 4 mm into the foam body.

[0067] The receiving device preferably comprises connecting regions for the purpose of forming the mechanical connection with a supporting element, such as a door panel.

[0068] The fire behavior of the foamed material forming the foam body is characterized according to FMVSS302 by a burn rate of less than 120 mm / min, preferably less than 75 mm / min for material thicknesses of 1.5 mm and above. Such fire behavior is required in connection with the use of such materials in motor vehicles, especially in conjunction with electrical devices.

[0069] The advantage of the loudspeaker damping system according to the invention is the provision of a unit that combines a loudspeaker and a damping device.

[0070] A further aspect of the invention is a motor vehicle comprising at least one damping device according to the invention fastened to a panel of the motor vehicle, in particular the panel of a vehicle door, or formed by such a panel and / or at least one loudspeaker damping system according to the invention.

[0071] The damping device is arranged, for example, on a panel, such as between a door panel on its inside, or the damping device is formed by the panel. In both cases, the loudspeaker is mounted on a supporting structure, such as the supporting structure of a vehicle door.

[0072] When the door panel is positioned as intended on such a supporting structure of a vehicle door, the damping device is positioned in such a way that the foam body surrounds the loudspeaker essentially in one plane.

[0073] In principle, it is not excluded that the damping device according to the invention and / or the loudspeaker damping system according to the invention is also installed on structures of a motor vehicle other than on a door panel or the supporting structure of a vehicle door.

[0074] For the purpose of forming the mechanical connection with the cladding, the receiving device preferably comprises connecting areas designed in sections for this purpose.

[0075] The invention is explained below with reference to the embodiment shown in the accompanying drawings.

[0076] It shows Fig. 1 : an embodiment of the damping device according to the invention in a section perpendicular to the arrangement plane; Fig. 2 : a detail of the embodiment of the damping device according to the invention according to Figure 1 ; Fig. 3 : a design form of the receiving device for receiving the foam body in a three-dimensional view; Fig. 4 : a detail of the design of the reception facility according to Figure 3 as well as Fig. 5 : an embodiment of the loudspeaker damping system according to the invention in a section perpendicular to the arrangement plane.

[0077] Figure 1 shows an embodiment of the damping device 10 according to the invention. The damping device 10 is shown in a section perpendicular to the arrangement plane 51 along the joining direction 50 in which the foam body 20 is joined to the receiving device 30. In the illustration according to Figure 1 The foam body 20 is inserted from above into the receiving space of the receiving device 30. The receiving space 31 is essentially bounded by three sides, namely by the first lateral boundary wall 32, the second lateral boundary wall 33, which is essentially opposite the first lateral boundary wall 32, and the bottom surface 34, which bounds the receiving space 31 downwards along the joining direction 50. The two lateral boundary walls 32, 33 taper slightly toward the bottom surface 34, which serves to demold the receiving device 30 from its manufacturing tool, typically an injection molding tool.

[0078] A projection 40 is arranged on the first lateral boundary wall 32, which forms an acute angle toward the foam body 20 in the plane of the illustration, which corresponds to the first plane. The projection 40 clearly protrudes into the foam body 20.

[0079] Opposite the projection 40, the bottom surface 34 has a recess 35. This recess 35 also primarily serves for demolding the receiving device 30 from its manufacturing tool.

[0080] Not shown here is the porosity of the foam body 20, which is open-pored, particularly in the direction of the projections 40. In other words, the surface of the foam body 20 adjacent to the lateral boundary wall 32 is not smooth. The tip of the projection 40 penetrates the pores of the foam body 20 during the joining process.

[0081] Figure 2shows a detail of the embodiment of the damping device 10 according to the invention according to Figure 1 and illustrates the specific design of the projection 40. It can be seen that the projection 40 forms an obtuse angle 44 with the first lateral boundary wall 32 on its upper side, i.e., the side facing away from the base surface 34, whereas the projection 40 forms an acute angle 43 on its lower, opposite side. In this way, an undercut is realized, which enables easy insertion of the foam body 20 from above and simultaneously counteracts unintentional removal of the foam body 20.

[0082] Figure 3shows a specific embodiment of the receiving device 30 for receiving the foam body 20 in a three-dimensional view. In the illustrated embodiment, the receiving space 31 of the receiving device 30 is annular. Accordingly, it serves to receive essentially annular foam bodies 20. It can be seen that projections 40 are arranged on both the first lateral boundary wall 32 and the second lateral boundary wall 33, with two projections 40 forming a group on the first lateral boundary wall 32. The projections 40 or the groups of projections 40 are distributed regularly and essentially equidistantly around the circumference.

[0083] The recesses in the edge region 36 of the receiving device 30 serve to fix the receiving device 30 to a supporting structure, in particular an interior panel of a motor vehicle door. Provision is made for a loudspeaker 60 to be placed in the joining direction 50 onto the foam body 20 located in the receiving space 31. This occurs during an assembly movement of an interior door panel on which the receiving device 30 with the foam body integrated therein is arranged, wherein the loudspeaker is fastened to a supporting structure of the door itself. When installed in a motor vehicle door, the loudspeaker grille is arranged on the underside of the receiving device 30, as shown.

[0084] Figure 4 shows a detail of the design of the receiving device 30 according to Figure 3. Three projections 40 can be seen here, arranged on the two lateral boundary walls 32, 33, as well as the recesses 35 in the base surface 34 opposite them. The three-dimensional view shows that the projections 40 are designed such that, on their side facing the respective lateral boundary wall 32, 33, they have a substantially rectangular base surface, from which the body edges taper to a point in the manner of a pyramid along the longitudinal direction of the projection 40. In an alternative embodiment, a mandrel with a round or oval base surface can also be realized. It is in no way mandatory that the taper of the projection 40 be realized over approximately the entire longitudinal extent of the projection 40.

[0085] Figure 5shows schematically an embodiment of the loudspeaker damping system 70 according to the invention. The edge region of a loudspeaker 60 is placed on the foam body 20 and, in this specific embodiment, penetrates a few millimeters into the foam body 20, which is correspondingly elastically deformable.

[0086] The foam body 20 thus dampens the portion of the sound waves emitted by the loudspeaker in the direction of, for example, the interior of a door, so that disturbing noises are reduced or avoided. List of reference symbols

[0087] 10 Damping device 20 Foam body 30 Mounting device 31 Mounting space 32 First lateral boundary wall 33 Second lateral boundary wall 34 Floor surface 35 Recess 36 Edge area 40 Projection 43 Acute angle 44 Obtuse angle 50 Joining direction 51 Arrangement plane 60 Loudspeaker 70 Loudspeaker damping system

Claims

1. Damping device (10), in particular for damping acoustic vibrations of a loudspeaker (60), comprising a receiving device (30) for receiving a foam body (20), the receiving device (30) delimiting, at least in regions, a receiving space (31) for receiving the foam body (20), and comprising a foam body (20) for arrangement on or in the immediate vicinity of a loudspeaker (60), the foam body (20) being arranged in the receiving space (31) of the receiving device (30), and a projection (40) being arranged or formed on at least one of the two elements, the foam body (20) and the receiving device (30), which projection protrudes in the direction of the other element and engages in an indentation in the other element, so that the foam body (20) is fixed in the receiving space (31) of the receiving device (30) in a form-fitting and / or force-fitting matter, the projection (40) being arranged on a lateral delimiting wall (32, 33) of the receiving device (30), which delimits the receiving space (31), and the foam body (20) being arranged adjacent to the lateral delimiting wall (32, 33) in an arrangement plane (51), so that the projection (40) protrudes in a deforming manner into the foam body (20),characterized in that the body edges of the projection (40), at least in an end region pointing toward the foam body (20), form a second acute angle in a second plane which is oriented along the longitudinal extension of the projection (40), substantially perpendicularly to the lateral delimiting wall (32, 33) of the receiving space (31), and substantially in parallel with the arrangement plane (51).

2. Damping device (10) according to the preceding claim, characterized in that body edges of the projection (40) form, at least in an end region pointing toward the foam body (20), a first acute angle in a first plane which is oriented along the longitudinal extension of the projection (40), substantially perpendicularly to the lateral delimiting wall (32 33) of the receiving space (31), and substantially perpendicularly to the arrangement plane (51).

3. Damping device (10) according to either of the preceding claims, characterized in that a plurality of projections (40) are arranged on least on one lateral delimiting wall (32, 33) of the receiving space (31).

4. Damping device (10) according to any of the preceding claims, characterized in that, in a bottom surface (34) of the receiving device (30), which is arranged substantially in parallel with the arrangement plane (51) and which defines, at least in portions, a support plane, a recess (35) is arranged opposite the projection (40) in order to facilitate the demolding of the receiving device from a casting mold.

5. Damping device (10) according to any of the preceding claims, characterized in that the face of the projection (40) that faces away from a bottom surface (34) of the receiving device (30), which is arranged substantially in parallel with the arrangement plane (51), forms an obtuse angle (44) with the lateral delimiting wall (32, 33) on which the projection (40) is arranged, in order to facilitate the insertion of the foam body (20) into the receiving space (31).

6. Damping device (10) according to any of the preceding claims, characterized in that the face of the projection (40) that faces toward a bottom surface (34) of the receiving device (30), which is arranged substantially in parallel with the arrangement plane (51), forms an acute angle (43) with the lateral delimiting wall (32, 33) on which the projection (40) is arranged, in order to provide an undercut which counteracts a removal of the foam body (20) from the receiving space (31).

7. Loudspeaker damping system (70) comprising a damping device (10) according to any of the preceding claims and a loudspeaker (60) which is surrounded, at least in portions, by the foam body (20) in a peripheral region.

8. Motor vehicle comprising at least one damping device (10) according to any of claims 1-6 which is fastened to a panel of the motor vehicle, in particular to the panel of a vehicle door, or is formed by such a panel, or comprising at least one loudspeaker damping system (70) according to claim 7.