EP2916316A1 - Sound absorption body, device, sound absorption device, method for insertion and method for removing a sound absorption body - Google Patents

Abstract

A sound absorption body (5) with attached hooks (10) projecting from a region of a surface of the sound absorption body and connected to the surface in such a way that at least at the area the hooks move with the surface and consist of perforations (3) a substructure (2) can move out. An apparatus comprises a sound absorbing body and an auxiliary mounting device (11, 12, 13) in the form of a plate with a thickened or bent end. A sound absorption device comprises at least one substructure with perforations and at least one sound absorption body attached to the substructure. A method for inserting a sound absorbing body comprises: inserting a mounting side of a mounting auxiliary device, then inserting the sound absorbing body or introducing the sound absorbing body in the substructure together with the mounting auxiliary device; Positioning the sound absorption body; Remove the mounting aid. A method of removing a sound absorbing body comprises: inserting a disassembly side of an assembly auxiliary between the sound absorbing body and the substructure, whereby the hooks slip out of the perforations; Removing the sound absorbing body or removing the sound absorbing body together with the mounting auxiliary device.

Description

The invention relates to a sound absorption body according to the preamble of claim 1, a device according to the preamble of claim 13, a method for inserting a sound absorption body according to claim 16 and a method for removing an inserted sound absorption body according to claim 17 ,

State of the art

To prevent sound reflections, highly absorbent or sound-reflecting rooms are lined with sound absorption bodies of sound-absorbing materials, which usually have an articulated surface structure. For this purpose, in particular sound absorption body with a cuboid shaft and a wedge-shaped upper part or a pyramidal upper part are suitable. Wedge-shaped sound absorption bodies may be formed either symmetrically, wherein the two converging surfaces have the same angle of inclination with the base surface ( DE-PS 809 599 ) or asymmetrical, wherein only one wedge surface of the sound absorption body is inclined, while the other forms a right angle with the base surface ( DE-PS 25 02 846 ). In order to design a high-absorbing or low-sounding room, as required for example in television and recording studios, for example, several sound absorption bodies are placed close together between perforated metal substructures, which are arranged on the required areas of the room, so that no sound reflection on behind the sound absorption bodies located walls or surfaces can take place.

A sound absorbing body is fixed to the metal substructure by piercing the perforations of the metal substructures and the sound absorbing body having a plurality of hook pins parallel to the space surface.

In this type of attachment of the sound absorbing body, the order of insertion and fixing of the individual sound absorbing body must be planned very carefully, since the piercing by means of hook pins can be made only laterally from the free side and parallel to the room surface and not from the front of the room side , In order to avoid sound reflections through lying behind the sound absorption bodies space surfaces, the sound absorption body must be mounted close together. Therefore, attaching the last sound absorption body to achieve a closing of the surface designed by hook pins as very difficult to impossible, since there is usually no sufficient space laterally available.

Another problem often arises as soon as there is a need to remove one or more sound absorption body after completion of attachment, without having to remove a large area sound absorption body, for example, access to behind installations, such as electrical cables or boxes, test leads, water pipe installations, etc., too receive.

From the DE 10 2004 025 350 A1 It is known that sound absorbing element can be releasably connected by means of adhesive strips with a carrier; the adhesive strip may comprise a Velcro connection. Upon insertion of the absorbent member, the adhesive tape may be covered and the cover removed after insertion so that the hook and loop fastener will contact a hook and loop strap of the wearer. For example, the adhesive strip may be disposed on a sleeve which surrounds the core of the absorbent member and which is destroyed to remove the core. Subsequently, the shell is released from the carrier. Thus, with this type of connection, the sound absorbing element used can not be removed in the state in which it was used and therefore would not be suitable for immediate reuse.

Object of the invention

The invention has for its object to provide a sound absorption body and methods for inserting or removing inserted sound absorption bodies available that allow a flexible insertion or removal of sound absorption bodies, wherein the sound absorption body are suitable for use in public areas.

solution

The object is achieved by the sound absorption body according to claim 1, the device according to claim 13, the sound absorption device according to claim 15, the method for inserting a sound absorption body according to claim 16 and the method for removing an inserted sound absorption body according to claim 17. Preferred embodiments are in the Subclaims disclosed.

A sound absorbing body is characterized by hooks attached thereto, the hooks projecting from a portion of a surface of the sound absorbing body, and the hooks are connected to the surface such that at a pressure at least to the region, the hooks move with the surface and the hooks extend Can move out perforations of a substructure. Preferably, the hooks are arranged in a line perpendicular to an insertion direction or a removal direction of the sound absorption body in or out of the substructure.

By pressing on at least the area of the surface from which the hooks project, the thickness of the sound absorption body is reduced there, so that a distance is formed between the surface of the sound absorption body and the substructure. The reduction in the thickness of the sound absorption body requires that the hooks move with the surface and the hooks can move out of the perforations due to the resulting distance between the surface of the sound absorption body and the substructure.

The hooks may be attached to the sound absorbing body by means of needling. A needling can be a direct attachment of hooks on the sound absorbing body, for example by means of needles or staples.

The sound absorption body may comprise a band to which the hooks are attached by means of needling or loops, the band being sewn, riveted and / or glued to the sound absorption body. It can also be provided that hooks are attached to a sound absorption body both directly to the sound absorption body by means of needling and on a belt.

The sound absorption body may comprise an envelope, which consists for example of non-combustible fibers, preferably of glass fiber or glass filament fabric. Such a cladding can protect the sound absorbing body from soiling, which could otherwise penetrate, for example, into the pores of the material of the sound absorbing body. It is possible to replace or clean the envelope of a sound absorption body. The cladding preferably does not affect the sound absorbing properties of the sound absorbing body.

The hooks may be attached to the enclosure. Depending on the planned arrangement of the sound absorption body in a substructure hooks can be attached only to those surfaces of the sound absorption body, which come into contact with the substructure or are adjacent to it, so that hooks can engage in the perforations. On surfaces of the sound absorption body, which are adjacent to surfaces of another sound absorption body, preferably no hooks are arranged.

The hooks may be attached to the enclosure by means of needling or loops, the loops preferably being nonflammable. A needling can be a direct attachment of hooks on the envelope of the sound absorbing body, for example by means of needles or staples. The loops can be subsequently sewn to the wrapper or woven into it. For attaching the hooks can be threaded into the loops.

The sound absorbing body may comprise a band on the enclosure to which the hooks are attached, the band preferably being non-combustible. The hooks can be detachably connected to the band. The band can be replaced in case of wear, so that not the entire enclosure and / or the sound absorption body must be replaced. It can be provided that a sound absorption body comprises more than one band, so that hooks can be arranged at different positions of the sound absorption body. The band may be considered as a mechanical reinforcement of the enclosure in the area in which the hooks are arranged.

The hooks may be attached to the band by means of loops, the loops preferably being non-combustible. In this case, the loops can be subsequently sewn to the band or produced together with this. The loops allow, for example, a hooking and unthreading of the hook, so that depending on the planned arrangement of the sound absorption body hooks are attached only to those surfaces of the sound absorption body, which come into contact with the substructure or adjacent to it, so that hooks in the perforations can intervene. On one surface of the sound absorption body, which is adjacent to a surface of another sound absorption body, preferably no hooks are arranged.

The tape may be sewn, riveted and / or glued to the envelope of the sound absorbing body. Thus, for example, already existing sound absorption body can be changed by attaching one or more bands, so that they can be used according to the invention. Also, by means of the strap a certain mobility of the hooks with respect to the sound absorbing body may be possible, so that the engagement in the perforations as well as slipping out of the hooks from the perforations using a mounting aid in the form of a plate with a thickened or a bent end to Removing the sound absorption body can be favored.

The sound absorption body may comprise a cuboid shaft with at least one wedge-shaped upper part or at least one pyramidal upper part. A room wall covered with such sound absorption bodies has an articulated area structure facing the space, whereby a good transition of the airborne sound into the sound absorption body takes place, since no preferred plane for sound reflections is present.

The sound absorption body may comprise an open-pore material, preferably fiber materials, such as mineral fiber. The bulk density is well defined and very tight in tolerance within a range of ± 0.5 kg / m ³ . The shape of the sound absorption body depends on the lower limit frequency to be achieved. This is defined by the fact that for all frequencies that are greater than or equal to the reflection factor must be less than or equal to 0.1. Since this consideration takes place in the frequency range 25 Hz to 200 Hz, the wavelengths are scaled correspondingly different lengths, so that the shape of the wedges also depends on this cutoff frequency. As a rule, the wedge depth can be estimated with a quarter wavelength of the cutoff frequency. In any case, the flow resistance of the fiber material used is tuned to the field impedance of the acoustic field (408 Ns / m ³ ) for the standard case.

The surface of the sound absorption body may be impregnated. This can prevent moisture, vapors, fats or other impurities from entering the sound absorption body. The impregnation of the surface preferably does not impair the sound-absorbing properties of the sound absorption body.

It can also be provided that the envelope of the sound absorption body is impregnated.

The sound absorption body can be temperature resistant, for example in a temperature range of -20 ° C to +120 ° C. The temperature resistance is advantageous so that even at different temperatures, a highly absorbent or low-sound-absorbing room retains its property and it can not come to volume changes of the sound absorption body that behind the sound absorption bodies lying space surfaces are accessible to the sound when gaps form between the sound absorption bodies.

The sound absorbing body and / or the hooks may not be combustible. As well as the above-mentioned non-combustibility of the belt and / or the loops and the enclosure, a classification as non-flammable according to DIN 4102 or EN 13501 is useful and partly necessary, especially when used in test benches of the automotive industry, in climatic chambers as well as in TV and recording studios.

A device may comprise a sound absorbing body as described above or below and an auxiliary mounting device, wherein the auxiliary mounting device is in the form of a plate having a thickened end or a bent end.

The thickened or the bent end, also referred to as disassembly side, can be introduced to remove an inserted sound absorption body between an inserted sound absorption body and the substructure, wherein the assembly aid should be at least as far inserted between the sound absorption body and substructure that it exerts an effect on the hook. The engaged with the Perforating hooks are moved by the compression of the sound absorbing body by means of the mounting auxiliary device with the surface of the sound absorbing body and slip out of the perforations. The mounting auxiliary device introduced between the sound absorption body and the substructure can also act on the substructure and cause the substructure to be moved away from the sound absorption body since pressure is locally exerted on the substructure by the auxiliary mounting device. The width of the mounting auxiliary device may correspond to the width of a sound absorption body or the width along which the hooks are attached to the sound absorption body, so that the thickened end or the bent end can act on all hooks of the sound absorption body and by this action the engaged hooks slip out of the perforations.

The non-thickened end of the plate, also referred to as the mounting side, may be used together to insert a sound absorbing body, i. at the same time, be introduced into the substructure with the sound absorption body. In the simultaneous introduction, it is advantageous if the non-thickened or non-bent end of the plate covers the hook of the sound absorption body, so that it comes to the engagement of the hook of the sound absorption body to no engagement of the hooks in the perforations of the substructure. It can also be provided that an edge of the mounting side is located in the curvature of the hook. Thus, although there may be a temporary, generally partial, intervention of the hooks in the perforations, but the hooks are still pushed by the assembly aid to a desired end position. By removing the mounting aid, the hooks can then fully engage in their end position in perforations.

Also, the non-thickened or non-bent end of the plate can be introduced before the sound absorption body in the substructure and then the sound absorption body. Preferably, the width of the non-thickened or non-bent end of the plate also corresponds to the width of a sound absorption body or the width along which the hooks are attached to the sound absorption body, so that there is a mechanical delimitation between hooks and perforations in mounting aid incorporated into the substructure , Thus, the plate covers the hooks of the sound absorption body, and these can not interfere with the perforations of the substructure. The thickness of the plate is preferably designed so that the plate is sturdy enough for use as a mounting aid, but also thin enough to be incorporated into the substructure together with the sound absorbing body. To facilitate engagement of the hooks in the perforations, the mounting aid becomes pulled out after positioning the sound absorption body between the sound absorption body and the substructure.

It is also possible that different mounting auxiliary devices are used for the insertion or for the removal of a sound absorption body, in which one for insertion, for example, a mounting aid, and the other for the removal, for example, a disassembly aid, are suitable.

A diameter of the thickened end or the bent end may be greater than a height of the hooks. If the diameter of the thickened or the bent end is greater than the height of the hooks, so when inserting the thickened or the bent end between an inserted sound absorption body and substructure, a pressure on the area of the surface of the sound absorption body, in which the hooks are mounted , which results in slipping out of the hooks from the perforations, since they are pulled out by the dimensions of the thickened or the bent end completely out of the perforations of the substructure. A local pressure is also exerted on the substructure by the auxiliary assembly device, so that the substructure is moved away from the sound absorption body. In addition, clamped at such a diameter, the thickened or the bent end is not in the openings of the hook.

A sound absorption device comprises at least one substructure with perforations and at least one sound absorption body attached to the substructure as described above or below, the hooks of the sound absorption body engaging in the perforations of the substructure.

The perforations of the substructure may have round, oval, rectangular, hexagonal, octagonal, star-shaped or keyhole-like cross sections. For example, the perforations are arranged in a regular pattern, wherein the perforations can have a pitch p1 to each other. The hooks attached to the sound absorption body may have a pitch p2 to each other which is a positive integer multiple of the pitch p1, so that by this relative arrangement of hooks and perforations to each other, the engagement of the hooks in the perforations is possible.

A method for inserting a sound absorbing body, as described above or below, in a substructure comprising perforations, comprises the following steps: introducing a mounting side of a mounting aid in the substructure and then introducing the sound absorption body in the substructure or introducing the sound absorption body in the Substructure together with the mounting side of the assembly auxiliary device; then positioning the sound absorbing body; after that Removing the assembly aid from the substructure, whereby an engagement of the hooks takes place in the perforations of the substructure.

If the mounting side of the auxiliary assembly device is introduced into the substructure in front of the sound absorption body, the perforations of the substructure are covered by the auxiliary assembly device.

If the sound absorption body is introduced into the substructure together with the auxiliary installation device, the auxiliary installation device may be arranged relative to the sound absorption body such that during insertion the hooks of the sound absorption body are covered by the mounting side of the installation auxiliary device, whereby the engagement of the hooks in the perforations prevented becomes. The mounting side can be a plate. In addition, the hooks are protected by the mounting side of the assembly auxiliary device from mechanical impact of being pushed along the substructure. Particularly advantageous is the use of the assembly auxiliary device, if a positioning of the sound absorption body to take place, for example, by a lateral displacement. When the final position of the sound absorption body is reached, the assembly aid can be removed so that the hooks engage in the perforations of the substructure. On the other hand, the assembly aid can be arranged relative to the sound absorption body so that an edge of the mounting side is in the curvature of the hook. Thus, although there may be a temporary, generally partial, intervention of the hooks in the perforations, but the hooks are still pushed by the mounting aid to a desired end position. By removing the mounting aid, the hooks can then fully engage in their end position in perforations.

A method of removing an inserted sound absorbing body, as described above or below, from a substructure comprising perforations, comprises the steps of placing a disassembly side of an assembly aid between the attached sound absorbing body and the substructure, whereby the hooks slip out of the perforations of the substructure ; then removing the sound absorbing body or removing the sound absorbing body together with the mounting auxiliary device. The disassembly side of the mounting auxiliary device may be a thickened end or a bent end of a plate.

Short description of the figures

• Figur 1 eine schematische Ansicht von montierten Schallabsorptionskörpern aus dem Stand der Technik,
• Figur 2 eine schematische Ansicht eines erfindungsgemäß montierten Schallabsorptionskörpers,
• Figur 3a eine schematische Ansicht eines Schallabsorptionskörpers während der Montage unter Verwendung einer ersten Ausführungsform einer Montagehilfsvorrichtung,
• Figur 3b eine schematische Ansicht eines Schallabsorptionskörpers während der Montage unter Verwendung einer zweiten Ausführungsform einer Montagehilfsvorrichtung,
• Figur 4 eine schematische Ansicht zur Verwendung einer Demontageseite der zweiten Ausführungsform der Montagehilfsvorrichtung und
• Figur 5 die zweite Ausführungsform der Montagehilfsvorrichtung.

Further advantages and embodiments will become apparent from the accompanying drawings. In the drawings shows:

• FIG. 1 FIG. 2 is a schematic view of prior art mounted sound absorbing bodies; FIG.
• FIG. 2 a schematic view of an inventive mounted sound absorbing body,
• FIG. 3a a schematic view of a sound absorbing body during assembly using a first embodiment of a mounting auxiliary device,
• FIG. 3b a schematic view of a sound absorption body during assembly using a second embodiment of a mounting auxiliary device,
• FIG. 4 a schematic view of the use of a disassembly side of the second embodiment of the assembly auxiliary device and
• FIG. 5 the second embodiment of the assembly auxiliary device.

Detailed description of the figures

FIG. 1 shows a schematic view of a known from the prior art mounting method for sound absorption body 1 to a substructure 2, the perforations 3 has. The substructure 2 is attached to a wall of a room, not shown, which is to be designed with low reflection. The parts of the perforated substructure 2, on and between which the sound absorption body 1 are arranged, are aligned horizontally. It is also possible to arrange the substructures and, correspondingly, the sound absorption bodies on a ceiling of a room. In addition, an arrangement of sloping walls and / or ceilings of rooms is possible.

In order to attach a sound absorption body 1 to a substructure 2, two hook pins 4 are here passed through perforations 3 of the substructure 2 and pierce the sound absorption body 1 from top to bottom and parallel to the wall, not shown. Instead of the two hook pins 4 preferably used, a different number of hook pins 4 can also be used for fastening a sound absorption body 1 to a substructure 2. The introduction of the hook pins 4, the piercing of the perforations 3 and the sound absorption body 1 is generally possible only laterally from the free side.

By this way, the arrangement of the hook pins 4, it is necessary to observe the order in the assembly of the sound absorbing body 1, so that the wall can be completely covered with sound absorption bodies 1 and all sound absorption body 1 can be fastened by means of hook pins 4.

FIG. 2 shows a schematic view of a sound absorption body used according to the invention 5. The sound absorption body 5 has circumferentially on a band 6, which is sewn in the embodiment shown at the tape edges on the sound absorption body 5 by means of seams 7 and also attached to the belt center line with rivets 8.

On the upwardly facing side of the sound absorption body 5 6 hooks 10 are attached by means of loops 9 on the belt. The hooks 10 are arranged such that they are opened in the inserted state of the sound absorption body 5 on the side facing away from the wall not shown and hooked into perforations 3 of the substructure 2. With this arrangement, the inserted hooks 10 ensure a secure hold of the sound absorption body 5 on the substructure 2 and also for the possibility of the hooks 10 from the front, i. aushaken from the room side by using a disassembly side of a mounting aid.

The hooks 10 each have open ends, wherein in the illustration two hooks are connected by means of a transverse connection. The distance between the open ends is designed so that the hooks 10 can hook into the perforations 3. This hooking is therefore possible not only in a specific position of the sound absorption body 5 relative to the substructure 2, but in different positions, so that by means of several sound absorption bodies 5, a room wall or ceiling can be completely covered completely.

By way of example, the perforations 3 of the substructure 2 are designed with a rectangular cross-section, wherein the size of the perforations 3 is designed in each case such that one or more hooks 10 can engage and, in addition, a hold of the sound absorption body 5 is possible without it being extended too far the perforations 3 is displaced.

FIG. 3a shows a schematic view of a sound absorbing body 5 during insertion into a substructure 2 using a first embodiment of a mounting auxiliary device 11, wherein the mounting auxiliary device comprises a mounting side. The auxiliary assembly device 11 is introduced together with the sound absorption body 5 or in front of the sound absorption body 5 in the substructure 2, so that it comes to rest between the substructure 2 and the sound absorption body 5, whereby a hooking of the hooks is prevented in the perforations 3.

The thickness of the mounting auxiliary device 11 causes a compression of the sound absorption body 5 and thus also the area of the surface of the sound absorption body 5, in which the hooks 10 are mounted. Thus, an introduction of the sound absorbing body 5 between the substructures 2 is possible, and it can be moved for positioning and aligned, without causing the hooks 10 to hook, since the Assembly aid 11, the perforations 3 covers. If the sound absorption body 5 is then arranged in a desired position, the auxiliary assembly device 11 can be pulled out between the substructure 2 and the sound absorption body 5. The compressed sound absorption body 5 expands, with the hooks 10 move with the surface, so that the hooks 10 can hook into the perforations 3 of the substructure 2.

FIG. 3b shows a schematic view of a sound absorbing body 5 during insertion into a substructure 2 using a second embodiment of a mounting auxiliary 12,13, wherein the mounting auxiliary device 12, 13 comprises a mounting side 12 and a disassembly side 13. The mounting side 12 is introduced together with the sound absorption body 5 or in front of the sound absorption body 5 in the substructure 2, so that it comes to rest between the substructure 2 and the sound absorption body 5, whereby hooking the hooks is prevented in the perforations 3. The further handling is carried out as in the first embodiment of the assembly auxiliary device as in the FIG. 3a described.

FIG. 4 shows a schematic view of the use of the disassembly side 13 of the second embodiment of the mounting auxiliary device 12, 13, wherein the disassembly side 13 is an auxiliary device for removing a sound absorption body 5 from a substructure 2. To the sound absorption body 5, as in the FIG. 2 shown by hooks 10 in perforations 3 of the substructure 2 is hooked to remove, the disassembly side 13 can be used, which has a bent end 13. The diameter of the bent end 13 is in this case greater than the height of the hook 10. The mounting auxiliary device 12, 13 is pushed with the bent end 13, ie the disassembly side 13, forward between the substructure 2 and the sound absorption body 5. The sound absorption body 5 is thereby compressed and the hooks 10 move with the surface, whereby the hooks 10 slip out of the perforations 3 of the substructure 2. A sound absorption body 5 dissolved in this way can then be removed alone, with the auxiliary assembly device 12, 13 still being introduced into the substructure 2, or pulled out of the substructure 2 together with the auxiliary assembly device 12, 13.

FIG. 5 shows the second embodiment of the mounting auxiliary device 12, 13 with a mounting side 12, which is designed as a plate 12, and a disassembly side 13, which is designed as a bent end 13 of the plate 12. In the FIG. 5 illustrated embodiment thus corresponds to a mounting auxiliary device 12, 13, which is suitable both for the insertion and the removal of a sound absorption body 5.

Claims (17)

A sound absorbing body (5) characterized by hooks (10) attached thereto projecting from a portion of a surface of the sound absorbing body (5) and connected to the surface such that at a pressure at least to the portion, the hooks (10) are connected to the hooks (10) Move along surface and the hooks (10) from perforations (3) of a substructure (2) can move out. A sound absorbing body according to claim 1, wherein the hooks (10) are attached to the sound absorbing body (5) by needling. A sound absorbing body according to claim 1 or 2, wherein the sound absorbing body (5) comprises a band to which the hooks (10) are attached by means of needling or loops, the band being sewn, riveted and / or glued to the sound absorbing body. A sound absorbing body according to claim 1, wherein the sound absorbing body (5) comprises a cladding, the cladding being made of, for example, non-combustible fibers, preferably glass fiber or glass filament fabrics. A sound absorbing body according to claim 4, wherein the hooks (10) are attached to the enclosure, the hooks (10) preferably being attached to the enclosure by means of needling or loops (9), the loops (9) being preferably nonflammable. A sound absorption body according to claim 4 or 5, wherein the sound absorption body (5) comprises a band (6) on the enclosure to which the hooks (10) are attached, the band (6) preferably being non-combustible,
wherein the hooks (10) are preferably attached to the belt by means of loops (9), the loops (9) being preferably non-combustible. A sound absorbing body according to claim 6, wherein the tape (6) is sewn, riveted and / or adhered to the casing. Sound absorption body according to one of claims 1 to 7, wherein the sound absorption body comprises a cuboid shaft having at least one wedge-shaped upper part or at least one pyramidal upper part. Sound absorption body according to one of claims 1 to 8, wherein the sound absorption body (5) comprises an open-pore material, preferably fiber material, such as mineral fiber. Sound absorption body according to one of claims 1 to 9, wherein the surface of the sound absorption body (5) is impregnated. Sound absorption body according to one of claims 1 to 10, wherein the sound absorption body (5) is temperature-resistant, for example in a temperature range of - 20 ° C to +120 ° C. Sound absorption body according to one of claims 1 to 11, wherein the sound absorption body (5) and / or the hooks (10) are non-combustible. Apparatus characterized by a sound absorption body according to any one of claims 1 to 12 and an auxiliary assembly device (11, 12, 13), wherein the auxiliary assembly device (11, 12, 13) in the form of a plate (11, 12) with a thickened end or a bent end (13). The apparatus of claim 13, wherein a diameter of the thickened end or the bent end (13) is greater than a height of the hooks (10). Sound absorption device comprising at least one substructure (2) with perforations (3),
marked by
at least one mounted on the substructure (2) sound absorption body (5) according to one of claims 1 to 12, wherein the hooks (10) of the sound absorption body (5) engage in the perforations (3) of the substructure (2). Method for inserting a sound absorption body (5) according to one of Claims 1 to 12 into a substructure (2) comprising perforations (3), comprising the steps: - Introducing a mounting side (11, 12) of a mounting auxiliary device (11, 12, 13) in the substructure (2) and then introducing the sound absorption body (5) in the substructure (2) or introducing the sound absorption body (5) in the substructure (2 ) together with the mounting side (11, 12) of the mounting auxiliary device (11, 12, 13), - then positioning the sound absorption body (5), - Then removing the auxiliary assembly device (11, 12, 13) from the substructure (2), whereby an engagement of the hooks (10) in the perforations (3) of the substructure (2). Method for removing an inserted sound absorption body (5) according to one of Claims 1 to 12 from a substructure (2) comprising perforations (3), comprising the steps: - introducing a disassembly side (13) of a mounting auxiliary device (12, 13) between the attached sound absorption body (5) and the substructure (2), whereby the hooks (10) from the perforations (3) of the substructure (2) slip out, - Then removing the sound absorption body (5) or removing the sound absorption body (5) together with the mounting auxiliary device (12, 13).

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