DE7930730U1 - SOUND ABSORBING COMPONENT MADE OF PLASTIC FILM - Google Patents

Description

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The present innovation relates to a sound-absorbing component consisting only of at least two foils arranged one above the other for lining interiors, in particular plastic films, in which, according to DE-OS 27 58 041.2-25, at least one film has cup-shaped depressions lying next to one another in a grid-like manner, the bottom surfaces of which are to be exposed to the sound field during installation Incidence of sound can be excited into lossy vibrations, with the upper edges of the cup-shaped depressions being shared by another equally vibratable, but flat one Foil are covered, which hermetically seals the air volumes contained in the individual cup-shaped depressions.

This sound-absorbing component according to DE-OS 2758 041.2-2 is a sound absorber which, on the one hand, is very suitable for practical use because it is lightweight and has a dense, closed surface and is therefore easy to keep clean and hygienic, even in damp rooms does not become ineffective by soaking in moisture, and which on the other hand has good sound absorption because the dem the bottom surfaces of the cup-shaped depressions facing incident sound largely absorb this sound by that they are excited to vibrate by the incident sound and absorb a substantial part of the incident sound energy through internal friction, the sound absorption being particularly large in the resonance ranges. Except the Bottom surfaces of these cup-shaped depressions, the side surfaces are also excited to natural oscillations, and in addition, the cup shape of the depressions as a whole is also made stimulated to natural vibrations, which in turn are superimposed on the plate vibrations of the bottom and side surfaces of these cup-shaped depressions. All forms of vibration that occur are carried by the plastic due to the damping of the material

Foil from which the cup-shaped Verta..e * fungeöi are made contribute to the absorption of sound energy.

Since, as already mentioned, the sound absorption in the range of the resonance frequencies of the natural vibrations, to which the bottom surfaces, the side surfaces and the entire cup shape of the depressions are excited, is particularly good, on the other hand it is not so good outside the range of the resonance frequencies, Overall, the result is a relatively strong dependence of the sound absorption coefficient on the frequency. However, in the frequency range from about 100 to about 5000 Hz, which is mainly in question, it is desirable that the sound absorption is as uniform as possible, i.e. one starting from the frequency to achieve an independent degree of sound absorption in order to be able to reduce the overall noise level indoors as evenly as possible.

In DE-OS 27 58 041.2 it has also already been proposed to achieve broadband sound absorption by increasing the number of resonances for one and the same sound-absorbing component to make the bottom surface and / or the depth of individual cup-shaped depressions different from each other. Furthermore, according to the above DE-OS brings about a breltbandigere sound absorption through impressions in the bottom surface of the cup-shaped depressions will.

The present innovation is intended in particular to increase the broadband, i.e. the uniformity of the Sound absorption can be further improved over the sound frequency range in question, that is to say the sound absorption properties of the component according to the invention should still be improved closer to those of an ideal sound absorber.

According to the present innovation, therefore, a sound-absorbing component of the type mentioned is available.

::: :::. ..: sets in which to broaden · "the '" requeriizumfangs of sound absorption and to increase the sound absorption coefficient of the sound-absorbing component, the surface contours and / or surface structures and / or related to the unit area basis weights of the floor surfaces of different cup-shaped depressions of the schallabsorbiererden Component different from one another and / or the unit area based weight of the bottom surfaces of the cup-shaped depressions are different from the unit area weight of the remaining material of the film having the cup-shaped depressions.

The number of resonance frequencies can be determined in this way the floors, the side walls and the cup-shaped depressions as a whole significantly increase and thereby a considerable achieve a better course of the sound absorption coefficient over the sound frequency.

In particular, the sound-absorbing component can be designed so that the cup-shaped depressions of the same schallabsorbivj ^ ending component from two or more groups consist of depressions each having an elongated surface outline of the bottom surface, whereby the individual groups of depressions differ from one another in that that the ratio of the length or the maximum length to the width or the maximum width of the floor surfaces is different is.

Here, the surface outlines of the floor areas can be rectangles, ellipses or rhomboids; these forms are of course, only particularly preferred exemplary embodiments of elongated surface outlines, as in principle too other tons of elongated surface outlines applicable are.

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The main advantage of this' s rggesfcreekteh F-surface outlines consists in the fact that they can be excited to considerably more natural vibrations than "compact" surface outlines and thus the sound absorption more evenly over the ones in question Sound frequency range is distributed. In the context of the present application, “elongated” area outlines understood such surface outlines in which the length dimension is noticeably or substantially larger than the width dimension is, or, more generally, the in at least one direction a noticeable or substantially greater extent than in another direction, in particular in the direction perpendicular thereto. On the other hand, under "squat" Area outlines to understand such area outlines, the length dimensions of which are approximately equal to the width dimensions, or, More generally speaking, the same extent or essentially the same extent in all directions in the surface to have; Examples of such "compact" surface outlines are circles, squares, regular polygons or the like.

The reason why the squat surface outlines are not so are suitable, consists in the fact that plates with such compact surface outlines a number of natural vibrations occur at the same or almost the same frequency, while in the case of plates with elongated surface outlines the corresponding Natural vibrations are different, in such a way that they differ significantly from each other. These Relationships are described below in the context of the figure description based on the differences that occur in the natural vibrations of a square and a rectangular plate, explained in more detail.

It is particularly preferable to use a sound-absorbing component of the type explained last so that the length or the maximum length of the elongated surface outlines in all groups of cup-shaped depressions is the same, while the width or the maximum width of group to

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Group is different; or vice versa? / In this way, since one of the two aforementioned dimensions of the cup-shaped depressions is the same, these different Cup-shaped depressions can be joined together more easily without the narrow spaces required additional spaces remain »which would reduce the effectiveness of the sound-absorbing component.

A particularly preferred embodiment is characterized in that two groups of cup-shaped depressions are provided »where the ratio of the length or the maximum length to the width or the maximum width of the bottom surfaces in one group is about 1.2: 1 to about 2: 1, while in the other group it is about 2.2 : 1 to about 4: 1. When three groups of cup-shaped depressions are provided, it is preferable that the ratio the length or the maximum length to the width or to the maximum width in the first group from about 1.2: 1 to about 2: 1, in the second group from about 2.2: 1 to about 3: 1 and in the third group is from about 3 * 2: 1 to about 5: 1. In this way, a good distribution of the individual resonance frequencies is obtained over the entire sound frequency range of interest.

In a further embodiment of a new sound-absorbing component, the film material of the bottom surfaces of the cup-shaped depressions is thinner than the film material of S _e itenwände of the recesses and of the ridges between the recesses or between the side walls of adjacent wells. In this way, a small surface weight of the bottom surfaces of the cup-shaped depressions is achieved, while at the same time the side walls of the cup-shaped depressions and the webs between the cup-shaped depressions remain sufficiently firm, so that they give the entire component a sufficiently high stability. At the same time, the

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. · ::. ·: ':. . :; • ::::: · - Absorption curve for the plate resonances de * · Boe areas very wide and high, because the floor areas due to the above configuration have a high loss factor and a have a small area-related mass.

Un to broaden the absorption curve towards the lower frequencies, i.e. by the degree of sound absorption in the range of the To raise low frequencies sharply, the sound-absorbing component can be designed so that on the floor surfaces the cup-shaped recesses lumpy bodies are attached, the size of the cross-sectional area .jedes stükx kigen body is small compared to the size of the bottom surface of the respective recess. These lumpy bodies can be plastic particles, in particular balls, which are deposited on the floor surfaces the cup-shaped depressions are adhesively attached, in particular melted. Such a melting can be technically very easy to carry out, so that despite the application of the plastic particles, an inexpensive production of the sound-absorbing component according to the invention results.

If you want a stronger "detuning" of the resonance frequencies to reach lower frequency values, then lumpy bodies are used, which consist of a material, its Specific weight is large compared to the specific weight of the sheet material of the cup-shaped depressions. Such lumpy bodies are preferably metal particles, glass particles and mineral or slag particles, in particular Particles with a rounded surface, so preferably metal, glass, mineral or slag spheres or spheres.

Even in these cases where heavy materials are used for the lumpy body, a very inexpensive production of the sound-absorbing component can be achieved according to the. Invention achieve by the lumpy body so far with the Foil material of the bottom surfaces of the cup-shaped indentations

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encircles them in a form-fitting manner so that they are held in place by the material; This fixed connection between the piece-like body and the film is obtained in a special way Simply by placing the lumpy bodies in a deep-drawing mold in which the cup-shaped depressions are formed so that the film in the area of the bottoms of the cup-shaped depressions during deep drawing around the lumpy body and thereby holds them tight.

The diameter or the mean diameter of the lumpy bodies is preferably between approximately 1 mm and approximately ε mm, while the size of the bottom surface of the cup-shaped recess

fungen is between about 10 and about 100 cm. As was established by investigations within the scope of the present invention, these dimensions result in particularly favorable sound absorption properties.

Finally, there is another possibility of increasing the number of resonance frequencies and thus of achieving one broadband absorption in the fact that the cup-shaped depressions of the same sound-absorbing component two or comprise more groups which differ from one another in that the amount and / or the size and / or the distribution and / or the weight and / or the material of the lumpy bodies placed on the floor surfaces are different, so that the individual floor surfaces are "out of tune" with one another in terms of their resonance frequencies. Let go of this measure the resonance frequencies are so varied and well distributed that you get a sound-absorbing component with an almost ideal Course of the sound absorption coefficient over the sound frequencies.

Yet another possibility of detuning the individual floor surfaces with one another is that the cup-shaped Wells of the same sound-absorbing component two

or more groups which "differ from one another in that the arrangement and / or the size of the features provided in the bottom surfaces is different. The diameter of the features can now be between 1 urine and 10 mm, preferably between 3 mm and 7 mm, vary, while the size of the bottom surface of the cup-shaped depressions is between about 10 and 100 cm. It is particularly preferred that between about 0.5 and about 5, preferably between about 1 and about 2 values per square centi The characteristics can be distributed irregularly or statistically or according to a predetermined regular pattern on the floor surface Invention in all cases before add, in which broadband absorption is important, but the costs for the sound absorption material are particularly critical.

In all those cases in which several groups of different cup-shaped depressions are provided, should preferably the cup-shaped depressions of each of the individual groups are regular or irregular or statistical Be distributed over the entire sound-absorbing component so that, on average, in each surface area of the sound-absorbing component, the several cup-shaped depressions provide substantially the same sound absorption characteristics.

To stiffen the component, the at the top of the Cover film lying in cup-shaped depressions can be provided with profiling, preferably with beads. In addition, the back of the cover film can be designed to be self-adhesive, so that the sound-absorbing component according to the invention can be attached to ceilings in a very simple and cost-saving manner

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.j! j ::: · . · ^: .. \ and walls of interiors "can be attached."

The invention is explained in more detail below with reference to the figures of the drawing using a few particularly preferred exemplary embodiments; show it:

Fig. 1 Chladnian sound figures of a square bottom surface of a cup-shaped recess through which the Natural vibrations of this floor surface are illustrated at two different frequencies;

2 shows two rectangular bottom surfaces of the same size of adjacent cup-shaped depressions;

3 shows two bottom surfaces of different sizes of two adjacent cup-shaped depressions;

FIG. 4 shows the degree of sound absorption of the arrangement according to FIG. 1 and the arrangement according to FIG. 3 as a function of the Sound frequency;

5 shows a partial sectional view of a deep-drawing mold in which cup-shaped depressions lying next to one another in a grid-like manner are formed in a film by deep-drawing, wherein balls made of a relatively heavy material are arranged on the bottom of the deep-drawing mold, around which the resulting bottom of the cup-shaped recess lies around during the deep-drawing process to such an extent that they are held in a form-fitting manner by this bottom;

6 shows the degree of sound absorption of sound-absorbing components according to the invention, the bottoms of the depressions not being weighted down with balls on the one hand, and on the other hand with glass balls and once with lead balls;

Flg. 7 shows a section through a cup-shaped recess and a flat film used to cover the same,

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• · ■

where the bottom is once without and once with characteristics provided 1st; and

Fig. 8 shows the degree of sound absorption of a component according to the invention, in which the bottoms of the wells once are smooth, as shown in Fig. 7a, and in which these bases are provided with embossments, as illustrated in Fig. 7b.

Reference is first made to Fig. 1, which shows that the number of natural frequencies of a square plate is relatively limited. These natural vibrations can by the equation:

A - A _mn . sin ~. η. χ. sin - . m. y (1)

where the individual symbols mean the following:

A s deflection of the plate A. = amplitude for the natural oscillation a «side length of the square plate x, y» coordinates of the plate, one corner of the plate being in the zero point of the coordinate system, while the adjacent sides are along the x or .y axis extend. m, n «integers that are greater than or equal to.

For reasons of symmetry, the natural oscillations (m, n) and (n, m) occur at the same frequency in square plates. Fig. 1 shows, for example, a superposition of the plate vibrations (1,3) and (3 | 1) at 650 Hz and the natural oscillation (3.3) at 1100 Hz, the side length a of the square plate in these cases 6.7 cm amounts to.

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OU "'■^i"::' 7 from ^"rectangular shape" In contrast, the natural oscillations can "by the equation:

A ■ A _mn . sin - .nx. sin -! g-. my (2)

represent, where a is the length and b is the width of the rectangular Plate mean, while the other symbols have the same meaning as in the above equation.

In the case of rectangular plates, in contrast to square plates, the natural vibrations (m, n) and (n, m) are different Frequencies, so that there are considerably more natural oscillations in the case of rectangular plates, which is an improvement the total sound absorption means that the sound absorption has a maximum at the resonance frequencies. It is as a result, an advantage when the bottom surfaces of the mugfönnigen Wells in the sound-absorbing components are rectangular, and if there are still two or more groups different sized rectangular bottom surfaces of the cup-shaped Wells are provided on the same component, namely instesondere with different ratios from length a to width b.

To illustrate the effects that arise when using differently sized rectangles as the bottom surfaces of cup-shaped Resulting depressions, two sound absorption curves I and II are shown in Fig. 4, of which the curve I on the sound absorption of the arrangement according to FIG. 2 and curve II on the sound absorption of the arrangement according to FIG. 3 refers. The arrangement according to FIG. 2 comprises two bottom surfaces made of polyvinyl chloride film of 0.3 mm in diameter, which are the same large rectangles with length a = 70 mm and width b ss 32.5 mm. The arrangement of Fig. 3 also includes

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two floor areas which have been formed in the same Tffe.i'se acrs a polyvinyl chloride film of 0.3 mm thickness, but one rectangular floor area 2 is larger than the other rectangular floor area 3. In the exemplary embodiment, the length a of the two bottom surfaces 2, 3 was also 70 mm, but the bottom surface 2 had a width of b ^ = mm and the bottom surface 3 had a width of b ₂ = 30 mm.

As FIG. 4 shows, the arrangement according to FIG. 3 results in the degree of sound absorption over the frequency by the Curve II is shown, a broadened absorption curve compared to the arrangement according to FIG. 2, its sound absorption curve I only have a single maximum.

The above statements of course also apply in principle to other surface shapes, so that one can say generally can that elongated floor surfaces are preferable to compact floor surfaces, for example elliptical Floor surfaces are preferable to circular floor surfaces because the former have a larger number of natural frequencies than the latter have.

The detuning, i.e. the change in the natural frequencies of the individual bottom surfaces can also be achieved by, as indicated in FIG. 5, being a lumpy body 4, preferably Balls, on the foil-shaped bottom surfaces 5 of the cup-shaped depressions 6 attaches.

In Fig. 5 is a partial sectional view through a deep drawing shape 7, in which the cup-shaped recesses 6 lying next to one another in a grid-like manner by means of a plastic film 8 are trained. One of the many vacuum channels that open into the areas of the deep-drawing mold where the Bottom surfaces 5 arise during deep drawing, is indicated at 9. A particularly preferred method of attaching

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lumpy bodies 4, for example "Von 'Gles-" 6der lead balls on the bottom surface 5 of the cup-shaped recess 6 consists in that the lumpy body 4 before implementation of the deep drawing in the areas of the deep drawing mold 7, in which the bottom surfaces 5 of the cup-shaped depressions 6 arise during the deep-drawing process. Namely, if the cup-shaped depressions 6 are formed during the deep-drawing process, while the lumpy bodies 4 are arranged in the areas just mentioned, the plastic film 8 then lays down as a result of the negative pressure generated by the negative pressure channels 9 around the lumpy body 4 in a form-fitting manner, to the extent that this lumpy body 4 is much more than half of of the plastic film 8, so that after completion of the deep-drawing process and after the bottom surfaces 5 have cooled or solidified, they no longer separate from the bottom surfaces 5 but can be held in a form-fitting manner by this.

FIG. 6 illustrates the degree of sound absorption of various sound-absorbing components which, according to FIG DE-OS 27 58 041.2-25 grid-like juxtaposed Have cup-shaped depressions whose floor surfaces to be exposed to the sound field during installation become lossy Vibrations can be excited, the upper edges of the cup-shaped depressions being covered together by a further, also vibratable, but flat film which seals off the air volumes contained in the individual cup-shaped depressions in an airtight manner. The dash-dotted curve III illustrates the course of the degree of sound absorption in a component in which the floor surfaces of the cup-shaped depressions smooth and not with backwards Bodies are weighted; the bottom surfaces were rectangular and had a length of 9 cm and a width of 8 cnu

In contrast, the curve IV shown in solid lines and the curve V shown in dashed lines each show the influence of a

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Weighting of the floor surfaces by "stutkige'Rorper; Me floor surfaces each had a length of 9 cm and a width of 8 cm and were weighted in each case by ten lumpy bodies. Curve IV shows the degree of sound absorption when the floor surfaces are weighted by Glass balls with a diameter of 5 mm, and curve V shows the degree of sound absorption when the floor surfaces are weighed down by lead balls with a diameter of 5 mm. As you can see, the lumpy bodies increase the degree of sound absorption and broaden the usable frequency range towards lower frequencies. As curve V clearly shows, the lead balls considerably improve the absorption in the frequency range from 400 to 1200 Hz in particular, i.e. the sound absorption coefficient is increased significantly, with the sound absorption coefficient also being above that at the higher frequencies from 1200 to 3500 Hz Sound absorption level of the component is the bottom surfaces of the cup-shaped depressions are not weighed down; only above 3500 Hz does the sound absorption coefficient according to curve V fall below that of curve III.

As can be seen from curve IV, the weighting by glass balls in the exemplary embodiment described does not bring such a strong increase in the degree of sound absorption im lower frequency range, as is the case when the floor surfaces are weighed down with lead balls, which is also the case for the rest is understandable because of the lower weight of the glass spheres, but there is also an overall increase in the Degree of sound absorption due to the weighting with glass balls practically in the entire frequency range in question from 400 to almost 5000 Hz as well as a leveling of the course of the Sound absorption coefficient versus frequency, i.e. the differences between maxima and minima of curve IV are less than those of curve III »which means that the degree of sound absorption is less dependent on the respective sound frequency means.

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Finally, as shown in Fig. 7'urifl 8 VeranscAauld'chen, Another way to increase the number of resonance frequencies and thus to achieve a pulpy sand Absorption consists in the fact that the individual bottom surfaces of the cup-shaped depressions are detuned from one another by means of impressions in these bottom surfaces, so that there are two or two there are more groups of cup-shaped depressions 10, which differ in that their bottom surfaces 11 have differently arranged or formed features 12 are provided, as indicated by Fig. 7b. For comparison, a cup-shaped depression 10 is shown in FIG. 7a smooth bottom surface 11 of the same size shown; both cup-shaped depressions of FIGS. 7a and 7b are through a Cover film 13 covered.

In Fig. 8 is the sound absorption coefficient of a component with cup-shaped depressions 10, the bottom surfaces 11 are smooth, represented by the curve VI drawn in solid lines, while the curve VII illustrates the degree of sound absorption of a component in which the bottom surfaces 11 of the cup-shaped depressions 10 are provided with impressions 12. In detail lay the curves . VI and VII are based on the following, for example, configurations of the cup-shaped depressions:

In both cases, the bottom surfaces 11 of the cup-shaped depressions 10 were square, the side length a = 9 cm fraud; the height h, i.e. the distance between the bottom surface 11 and the cover film 13, was also in both cases 3 cm. In the bottom surfaces 11 of the embodiment according to FIG. 7b 100 expressions were provided in each case, distributed irregularly, with the diameter of the expressions between 3 mm and 7 mm and the depths of the features between about 3 mm and varied about 4 mm. The bottom surfaces 11 different beche shaped depressions 10 of one and the same component un differ in that the arrangement of the expressions

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• · · ι

> ι

different from floor surface to floor surface

How to get from Flg. 8 has been seen through this training and arrangement of the expressions 12 in the bottom surfaces 11 a significantly more uniform course of the degree of absorption in the The frequency range in question from about 500 to about 5000 Hz compared to smooth floor surfaces 11 is achieved.

The cover film 13 can, as FIG. 7b shows, for stiffening be provided with profiles 14, for example beads. In addition, the rear side, i.e. the side of the cover film 13 facing away from the bottom surface 11, can be self-adhesive for assembly reasons.

End of description.

Claims (27)

KRAUS & WOSE RT .: i ":;: PATENTANWÄLTE DR WALTER KRAUS DIPLOMCHEMIKER - DR.-ING. ANNEKATE WBSERT DIPL. 212156 kpatd TELEGRAM KRAUSPATENT 2181 JS / ps Protection claims 1. Sound absorbing, only at least two on top of each other arranged foils existing component for lining Ii interior spaces, in particular plastic foils, in which at least one foil is in a grid-like manner, cup-shaped depressions lying next to one another whose floor surfaces to be exposed to the sound field during installation become lossy in the event of sound incidence Vibrations can be excited, the upper edges of the cup-shaped depressions also being shared by another Vibration-proof, but flat film is covered, which the air volumes contained in the individual cup-shaped depressions airtight, characterized in that to broaden the frequency range of the sound absorption and to increase the degree of sound absorption of the sound-absorbing component, the surface cracks and / or the surface structures and / or the surface weights of the floor areas (2, 3 »5, 11) based on the unit area of different cup-shaped recesses (6,10) of the same sound-absorbing component and / or that on the surface unit related weight per unit area of the bottom surfaces (2,3,5,11) of the cup-shaped depressions (6,10) from the to the unit area based weight per unit area of the remaining material of the cup-shaped depressions (6,10) having foil (8) different are. 2. Schallabsorbierendes Bauei «menV« ria <ch claim 1, characterized in that the cup-shaped depressions of the same sound-absorbing component consist of two or more groups of each an elongated surface outline of the bottom surface (2,3) having depressions, the individual groups differ from depressions from one another in that the ratio of the length (a) or the maximum length to the width Cb ₁ , b 2) or to the maximum width of the bottom surface ( _{2, 3) is different.} 3. Sound-absorbing component according to claim 2, characterized in that the surface outlines the floor areas are rectangles. 4. Sound-absorbing component according to claim 2, characterized in that the surface outlines the bottom surfaces are ellipses. 5. The sound absorbing component according to claim 2, characterized in _t that said surface contours of the floor surfaces are rhomboids. 6. Sound-absorbing component according to one of claims 2 to 5, characterized in that the Length (a) or the maximum length of the elongated surface plan is the same in all groups of cup-shaped depressions is, while the width (b .., b ») or the maximum width ν Group to group is different; or the other way around. 7. Sound & bsorbierendes component according to one of claims 2 to 6, characterized in that two groups of cup-shaped depressions are provided, the ratio of the length (a) or the maximum length to the width (b ^, b ₂ ) or to the maximum width of the floor areas (2.2 in one group from about 1y2: "t to ^: * about J?: 1", while in the other group it is from about 2.2: 1 to about 4: 1. 8. Sound-absorbing component according to one of claims 2 to 6, characterized in that three groups of cup-shaped depressions are provided, the ratio of the length (a) or the maximum length to the width (b ^, b ₂ ) or to maximum width in the first group from about 1.2: 1 to about 2: 1, in the second group from about 2.2: 1 to about 3: 1, and in the third group from about 3.2: 1 to about 5 : 1 is. 9. Sound-absorbing component according to one of claims 1 to β, characterized in that the Foil material of the bottom surfaces (2,35,11) of the cup-shaped depressions (6,10) is thinner than the foil material of the side walls of the depressions (6,10) and the webs between the individual wells. (6,10) or between the side walls of adjacent wells (6,10). 10. Sound-absorbing component according to one of claims 1 to 9, characterized in that on the bottom surfaces (5) of the cup-shaped depressions (6) piece body (4) are attached, the size of the cross-sectional area of each of the piece body (4) small compared to the Size of the bottom surface (5) of the respective recess (6) 1st. 11. Sound-absorbing component according to claim 10, characterized in that the lumpy body (4) plastic particles, in particular -Balls, are the on the bottom surfaces (5.) of the cup-shaped depressions (6) are adhesively attached »in particular melted. 12. Sound-absorbing component according to claim 10, characterized in that the lumpy body per (4) made of a material, the specific weight is large compared to the specific weight of the film material (8) of the cup-shaped depressions (6). 13. Sound-absorbing component according to claim 12, characterized in that the lumpy body (4) are metal particles, in particular with a rounded surface, preferably metal balls. 14. Sound-absorbing component according to claim 12, characterized in that the lumpy body (4) glass particles, in particular with a rounded surface, are preferably glass spheres. 15. Sound-absorbing component according to claim 12, characterized in that the lumpy bodies (4) are mineral or slag particles, in particular with a rounded surface, preferably mineral or slag globules. 16. Sound-absorbing component according to one of claims 12 to 15, characterized in that the lumpy bodies (4) are positively enclosed by the film material (8) of the bottom surfaces (5) of the cup-shaped depressions (6) in such a way that they are held by the same. 17. Sound-absorbing component according to one of claims 10 to 16, characterized in that the diameter or the mean diameter of the lumpy body (4) is between about 1 mm and about 8 mm, while the size of the bottom surface (5) of the cup-shaped depression and gen (6) is between about 10 and about 100 cm. 18. Sound-absorbing component according to one of claims 10 to 17, characterized in that the cup-shaped depressions * include (β) of the "gieichen · sound-absorbing device two or more groups, which differ by the fact that the amount and / or the size and / or distribution and / or the weight and / oc tv the material of the at the bottom surfaces (5) applied lumpy body (A) is different. 19. Sound-absorbing component according to one of claims 1 to 9 »characterized in that the cup-shaped depressions (10) of the same sound-absorbing component comprise two or more groups, which differ from one another in that the arrangement and / or the size of the impressions (12) provided in the bottom surfaces (11) is different. 20. Sound-absorbing component according to claim 19, characterized in that the diameter of the Expressions (12) between 1 mm and 10 mm, preferably between 3 mm and 7 mm, while the size of the bottom surface (11) of the cup-shaped depressions (10) is between about 10 and 100 cm. 21. Sound-absorbing component according to claim 19 or 20, characterized in that between about 0.5 and about 5 », preferably between about 1 and about 2 Expressions (12) per square centimeter are provided. 22. Sound-absorbing component according to claim 19, 20 or 21, characterized in that the Expressions (12) are distributed irregularly on the bottom surface (11). 23 «Sound-absorbing component according to claim 19, 20 or 21, characterized in that the shaped areas (12) cough according to a predetermined, regular pattern are distributed on the bottom surface (11). 24. Sound absorbing component? »According to one of claims 1 to 23» characterized in that the lying on the upper edge of the cup-shaped depressions (10) Cover film (13) is provided with a profile (14), preferably with beads. 25. Sound-absorbing component according to one of claims 1 to 24, characterized in that the The back of the cover film (13) is self-adhesive. 26. Sound-absorbing component according to one of claims 1 to 25t, characterized in that the cup-shaped depressions (6,10) of each of the individual Groups regularly or irregularly or statistically about the entire "sound-absorbing component are distributed. 27. Sound-absorbing component according to one of claims 19 to 26, characterized in that the The depth of the embossments (12) varies between 2 mm and 5 mm, preferably between 3 mm and 4 mm.