EP3510590A1

EP3510590A1 - Planar element for the active compensation of noise in an interior room and anti-noise module therefor

Info

Publication number: EP3510590A1
Application number: EP17737722.3A
Authority: EP
Inventors: Reto SCHLÄPFER; Markus PINKPANK
Original assignee: Oaswiss AG
Current assignee: Oaswiss AG
Priority date: 2016-06-17
Filing date: 2017-06-14
Publication date: 2019-07-17
Anticipated expiration: 2037-06-14
Also published as: JP2019525223A; CN109328379A; DE102016007391A1; EP3510590B1; US10388266B2; US20190147846A1; WO2017216250A1

Abstract

The invention relates to a planar element (24), which can be designed as a curtain for a window (13), as a partition or dividing wall, or as a ceiling part or wall part, for the active compensation of noise (14') from different directions (17') in an interior room. The planar element is equipped with anti-noise modules (12), each having a microphone and an electronic circuit having a combination of filters for adjusting phase and amplitude and an electronically controllable amplifier and a loudspeaker for active noise cancellation. As a special characteristic, the planar element (24) is equipped over the width thereof with a plurality of anti-noise modules (12) controllable in an analog manner on each of a plurality of different longitudinally extending lines and is to be placed, for example, in front of a window having bounding walls (13). Said anti-noise modules (12) are at most 50 mm thick, at most 150 mm long, and at most 100 mm wide and have a maximum weight of 200 grams per anti-noise module (12) such that said anti-noise modules can be inconspicuously integrated into the planar element (24) and jointly form longitudinally extending chains of anti-noise modules (12), the anti-noise modules of each chain being arranged in succession over electrical supply lines jointly connecting the anti-noise modules in the form of just two electrical cables extending along the longitudinally extending line. The chain, with the supply lines thereof, is connected in parallel by two electrical supply cables or supply rails, which are under low voltage and which extend transversely to the longitudinally extending lines of the chains. The loudspeakers emit a canceling sound (16') with respect to the noise (15'), which canceling sound first passes through the planar element (24) and subsequently largely cancels the noise.

Description

Flat element for active compensation of

Noise in an interior as well as an anti-sound module

This invention relates to a sheet-like element for active compensation of background noise in an interior space, this sheet-like element can be designed as a curtain for a window, as a partition, as a partition or as a ceiling part. To compensate for the noise, anti-sound is generated, that is a targeted and artificially generated sound, which is superimposed on the noise and its phase is shifted from the background noise so that the background noise is extinguished or greatly attenuated. Ideally, the phase difference of the anti-sound is 180 degrees and also its volume or amplitude corresponds to that of the noise, so that the latter is then theoretically extinguished to 100%. In English, the terms Active Noise Reduction [ANR] or Active Noise Cancellation [ANC] are common. The anti-sound module associated with this planar element is likewise the subject of the invention.

"Noise reduction devices" or "active noice cancellation devices" are known in various designs, including those that work with an analog circuit. Essentially, it's about creating a counterwave, with the same frequency, intensity, or sound pressure, but shifted by 180 degrees. Such known anti-sound devices, with the exception of the known headphones, are characterized by a greater or lesser complexity and often require considerable constructive measures and / or complex signal processing in order to unfold their effect. Such known In principle, anti-noise arrangements can be subdivided into three groups: anti-noise headphones, anti-noise arrangements for outdoor use and anti-noise arrangements for interiors. In the case of the latter, on the one hand, there are arrangements for vehicles in which mostly noise generated by the vehicle itself is to be suppressed, eg in aircraft or cars. On the other hand, there are arrangements for interiors in which on the one hand in the room self-generated noise should be reduced, for example, in offices, or on the other hand from outside through windows and doors penetrating noise such as road noise in living rooms, work and office space to be reduced.

US 201 1/0274283 A1 describes systems for noise reduction for a variety of applications and also mentions analog circuits (page 1, right column, 8th line). The arrangement of a series of sound-elimination units is also mentioned and shown (page 1, right column, 7, row from below). A single sound elimination unit consists of a directional microphone, a directional speaker, and a signal processing module (page 2, left column, lines 2-3). Such modules can be arranged in a one-, two-, or three-dimensional pattern or raster (page 2, left column, section [0012], lines 5-6). The sound cancellation is described mathematically by the formula before section [0037]. And in section [0037] the variables are defined. A unidirectional micro of Panasonic is e.g. suitable (page 5, section [0045]). The loudspeaker is essentially positioned behind the microphone (section 45, lines 13-16), and the arrangement can also be made very small. As a speaker driver is a model of Tang Band Comp. - Section [0049]. Section [0055] states that one can achieve a sound reduction of 15 dB below the resonance frequency of the system (from the 6th line). In section [0068], from the sixth line the necessary electronics are described, i.a. also an analogue. Specific applications with, for example, a number of modules or other arrangements of the modules are described in the section [0077] to [0084].

US 4 025 724 dates from the 70's and describes sound cancellation units. FIG. 5 shows a matrix-shaped arrangement of such units. Column 2 from the first line indicates that a pattern or series of sound elimination units are placed near a surface and one output signal each which depends on the acoustic sound generated by the immediate environment on the surface. In column 2, line 29, it is stated that in principle a signal-generating circuit is used which phase-shifts the signals by 180 ° and then sends them to a loudspeaker. The system is described in column 3, from row 59 to column 4 row 10. Column 4, line 30 states that more than one module can also be installed, ie, for example, a row (array). And in line 46 it says: The microphones are arranged in a symmetrical array, here around the loudspeaker. In column 7 it says in line 34: The horizontal and vertical distance between juxtaposed sound elimination modules lies in the range of approx. 1.56 feet (= approx. 47cm) or less.

US 2012/0155669 A1 discloses a noise reduction unit as shown in Figure 8a in a combination of passive and active noise abatement - as can be seen from section [0028]. A stack of beams is used, each beam containing a series of noise elimination units with microphones 62 and loudspeakers 61 and a number of such beams arranged in parallel. Inside the beams, there is noise-insulating material. The unit can be placed in the same with the window open in order to largely eliminate the noise from the outside, as further explained in [0032] and [0037].

The US patent application US2007 / 0223714 A1 relates primarily to anti-noise measures in free space. In this case, both the diffracted at the upper edge of a sound-absorbing wall noise and the direct, that is directly acting on the receiver noise is considered. For this purpose, on the one hand noise-collecting microphones, so-called "noise collection microphones", arranged close to the noise source, and on the other hand noise correction microphones "noise correction microphones" in the vicinity of the receiver, ie in the area to be protected by sound. Although the examples of anti-sound walls and the associated description shown in FIGS. 7 to 11 of this patent application are not entirely clear, it is obvious that such "noise collection" microphones are arranged or directed close to the interfering sound source; on the other hand, "noise correction microphones "provided in the soundproof area. It is noticeable that according to this document the anti-noise loudspeakers are arranged so as to be perpendicular to the sound input direction, which due to the radiation characteristic of Speakers but also because of their distance probably a less effective arrangement. In addition, the entire arrangement, ie all microphones and loudspeakers, are interconnected via an extensive network and thus controlled and permanently installed.

U.S. Patent Application US2006 / 0285697 A1 to M. Nishikawa et al. shows another series of very different examples or designs. However, these basically refer to anti-sound measures in free space, whereby only the diffracted sound should be influenced or extinguished. In some figures, especially in the figures 33 to 36, a kind of anti-noise wall is indicated. However, these embodiments relate only to noise, which is diffracted at the top of a massive soundproof wall. This "diffracted sound" should be minimized by appropriate anti-sound. This is done by two groups of several microphones, one group on the upper edge of the soundproofing wall for the collection of the noise or "noise collection", and another group for error correction or "error correction" in the soundproof area, ie near the receiver person and near several Speaker. The whole thing is in turn connected to a rather complex and fixed network of transmitters, receivers and processing units. An analog network is shown in Figure 31, a digital one in Figure 32 of this document.

Japanese Patent JP 4 742 064 B2, published as JP2008 / 241899 A, shows a curtain of strip-shaped flat panel loudspeakers controlled by a common control unit. The latter receives signals from a wireless microphone. The sound recorded by this one central microphone should be actively compensated. Obviously, this patent does not provide a solution to noise or sound coming from outside into an interior. It is only the interior noise on a single microphone compensated at the user, so there is locally a soundproof area is generated.

The US Patent US 9 230 534 B2 of Xu essentially relates to an arrangement with a directional microphone outside and inside and a hi-fi speaker system inside, with an emphasis on the signal processing of the microphones and the determination of a suitable Antischalls lies. After all, here is one "Outdoor / Indoor" solution for the treatment of noise from outside that penetrates an interior, again using a network with an externally mounted microphone and a rather complex control.

Another example of an "outdoor / indoor" solution can be found in the form of an anti-sound device shown some years ago under the trade name "Sono." This approximately hand-sized device is to be attached to window panes and it is to the vibrations of the outer pane Apparently, the inner disk itself is supposed to serve as a diaphragm for the generation of sound and has been experimentally shown to reduce noise by 12 db and to produce the desired pleasant sound which, of course, is not an anti-noise, but an overlapping or masking of the noise, but the device is currently not available on the market.

httpi // www.technikiournal.de / cms / front content.php? idcat = 59 & idart = 823

However, whether the functions and services described are actually achieved is not verifiable for lack of availability.

[001 1] All in all, the finding is that electronic components are known for reducing or even eliminating sound - even analogously functioning microphones, electronics and loudspeakers. The arrangement of such units in rows or even matrix-shaped is known.

While the above examples give many hints, they show some more theoretical than effectively workable antisound solutions. The solutions mentioned so far have hardly been used, if ever they have been commercially implemented. They are also quite complicated in design and - with the exception of the functionally unknown Sono device - expensive to install and relatively difficult to adapt to the respective noise situation. Overall, these solutions are far from an anti-sound solution, which not only has a particularly simple, extremely compact and lightweight design, but can also be retrofitted and installed without profound expertise, and the nevertheless impressively effective to reduce or even eliminate noise.

The object of the present invention is in view of this initial situation, to provide a planar element for the active compensation of background noise in an interior, this flat element can be designed as a curtain for a window, as a partition or partition or as a ceiling part. To compensate for background noise to be generated anti-sound, that is a targeted and artificially generated sound, which is superimposed on the noise and its phase is shifted from the background noise so that the background noise is extinguished or greatly reduced. This flat element should be particularly inexpensive to produce and thus create a low-cost anti-noise device for interiors, which is easily adaptable to different locations and their specific circumstances and therefore suitable for almost any interior spaces. An essential requirement for this sheet-like element is that it should offer the possibility of an uncomplicated, especially retrofitting installation by non-professionals, especially in the case of a curtain and a parking or partition. Another object of the invention is to provide a suitable anti-ballast module for incorporation in such a planar element. The anti-sound solution in the form of this sheet-like element should thus have a particularly simple, very inexpensive to produce, highest compact and lightweight design, can be retrofitted and installed without profound expertise by laymen, and yet impressively effective reduce or even eliminate noise.

The solution to this problem consists in a sheet-like element, designed as a curtain for a window, as a partition wall, partition, as a ceiling part or wall part for active compensation of background noise in an interior, with a plurality of interconnected, similar anti-noise modules with a microphone , an electronic circuit with a combination of filters for adjusting the phase and amplitude and an electronically controllable amplifier and a speaker, which is characterized in that the planar element on its width on several different lines each having a plurality of analog controllable anti-noise modules, the at most 50mm thick, at most 150mm long and at most 100mm wide, with a maximum weight of 200 grams per Anti-Hall module, so that they are inconspicuously integrated into the planar element and each together form a line extending along these lines of anti-noise modules, which are arranged in succession on jointly connecting them electrical supply lines in the form of only two along this line extending electrical cables, the Chain is connected in parallel with their supply lines and is supplied by two electrical supply cables or supply rails with a low-voltage voltage, which extend transversely to the longitudinal lines of the chains. Furthermore, the solution consists in an anti-sound module according to claim 13.

In short, this sheet-like element as an antisound device consists of a plurality of similar built-up, mutually independent, somewhat self-sufficient anti-sound modules - in contrast to a known complex network. These anti-ballast modules are compact and contain - unlike distributed components as previously practiced - all the necessary components for the production of the required anti-noise, ie at least one microphone, an electrical circuit and a speaker. Only external power may be required for the power supply and external volume control unless a battery, battery or solar solution and / or fixed volume is selected. These anti-sound modules can be combined in any desired two-dimensional arrangement, assembled and optimized at a distance to each other. This allows an arrangement that can be largely adapted to the shape of an interfering sound entry location, for example, as an inverted U-shape that compensates for the noise entering through a tilted window. Any "correction microphones" with appropriate electrical networking are unnecessary. The adaptation to the given Störschall ratios is done simply by the selection, arrangement and adjustment of the volume or by the amplifier effect of the individual anti-sound modules. This allows the desired noise compensation on the one hand set during installation by simple trial and on the other hand be improved at any change in the noise conditions at any time with little effort. Due to the possible invisible integration of the anti - sound modules into other functional furnishings that can be implemented as flat elements, for example in a slat curtain, remains in the Unlike appliances that stick to the window, for example, the living atmosphere and ambience of the interior optically undisturbed.

The present invention therefore shows a solution that addresses primarily the last-mentioned problem, namely the reduction or extinction of unwanted external and mostly indoor noise indoors, and it offers, so to speak, a pure interior solution that not only easy is built, but can also be installed later and without much expertise. Outstanding features and advantages of such a planar element according to the invention can be seen in the following situations:

1 . Ultra-flat, lightweight and compact design of the units of anti-ballast modules so they can be elegantly integrated into a curtain - barely visible.

2. Special, parallel power supply of whole series of units or anti-noise modules, elegantly executed, with minimal effort, and also hardly visible.

3. Construction of the units particularly inexpensive, with simple analog circuit and efficient effect.

4. Thanks to the modular design and simple assembly, any and simple adaptation to the size and geometry (for example, windows unfolded or completely open) of the sound entry.

5. Easy to install by laypersons with simple instructions.

6. The matrix with distances of about 15cm between the units is particularly effective over a wide frequency band and achieves a maximum noise reduction in the frequency range of 500 Hz to 1200Hz, and at 703.2 Hz even optimal sound reduction of up to 20dB.

7. The anti-balling modules are embedded in polyester felt, each with rubber cap - and a glued assembly of the units is particularly simple, weight-saving, fast and inexpensive in the application.

Due to the structure with autarkic antisound modules no further signal processing is necessary to compensate for example noise from different directions. This also allows the production of cost-effective variants, for example, optimized for the size of the range of sound entry. Thus, different module arrangements can be developed for attachment to a window, depending on whether the window can only be tilted or unfolded or completely opened or should. To compensate for background noise, eg in an open-plan office with noisy machines or a noisy meeting area, the self-sufficient anti-noise modules can be integrated into movable or fixed partition walls or curtains as flat elements. Further, it is possible to integrate anti-noise modules in planar elements, which are designed as ceiling or wall constructions to compensate for background noise from an overlying floor or from an adjoining room.

Details of the invention can be taken from the following description of exemplary embodiments, the drawings and the claims. Hereinafter, several embodiments of the invention are illustrated and described with reference to these drawings. In the drawings show:

Fig. 1 is an overview drawing of a typical anti-sound module for

Equipment of a planar element according to the invention;

Fig. 2 is a block diagram of the in an anti-sound module of the planar

Element provided electrical components;

3 shows an example of an antisound module for the planar element with a plurality of microphones and / or loudspeakers;

Fig. 4 shows a typical arrangement of several antisound modules in one

Curtain executed flat element on a window;

Figure 5 is a schematic representation of the operation of the anti-noise modules of a curtain when viewed from perpendicular to the curtain noise, seen in a view from above.

Fig. 6 is a schematic representation of the operation of the anti-ballast modules of a curtain when incident from different directions noise, seen in a view from above; 7 shows an exemplary embodiment of a planar element as a curtain for an unfolded window;

Fig. 8 shows an embodiment of a sheet-like element as

Strip curtain;

Fig. 9 A lid, looking into its inside;

Fig. 10 seen the lid in perspective view on its inside;

Fig. 1 1 seen the lid on its back;

Fig. 12 shows a Fliz insert;

Fig. 13 seen an elastomer insert on its back;

Fig. 14 seen an elastomer insert on its front side;

Fig. 15 shows a speaker in perspective view;

Fig. 16 Seen the speaker on his back;

Fig. 17 Seen the speaker on its front side;

Fig. 18 shows a plate in perspective view;

Fig. 19 is a plan view of this plate;

Fig. 20 The plate seen from the rear;

Fig. 21 shows the assembled module in a perspective view; Fig. 22 The assembled module in a plan view of the front side, from which the anti-sound is radiated.

Figure 1 shows schematically the outer design of an anti-noise module 12 for installation in a sheet-like element according to the invention, this flat element is now executed as a curtain, as a partition or partition, as in a room installable ceiling part or as a wall part. The anti-noise module 12 comprises in a first embodiment as the core of a circuit board, which additionally serves as a connection element for the individual components for generating the anti-noise, in particular for the speaker 2. Plastic elements, such as a lid 26 and a plate 29 are low in ABS, that is made of acrylonitrile-butadiene-styrene copolymers. These are thermoplastic terpolymers, but they are relatively expensive to develop. Thanks to their optimized design, these plastic elements effectively stabilize the board inside and, for example, give the right shape to a curtain designed as a louvred curtain. In addition, a size-optimized plastic element (e.g., a lid 26) serves as a sound box for the loudspeaker. The plastic used was successfully subjected to a UV stress test. The anti-ballast module has suspension elements 3 for suspension and optionally connection to further anti-ballast modules, to which connection elements can be attached. These connecting elements can also be used for power supply and / or electrical control, in particular for volume control. To attach the speaker, a low producible and durable elastomer can be used, which fixes the speaker thanks to a special design with minimal transmission of vibrations. UV stress tests proved the durability and durability of this elastomer. A polyester felt in optimized thickness and density, in which the speaker 2 is embedded, dampens the vibrations of the speaker 2, so that the vibrations are not transmitted to the board and the plastic elements.

On the side facing away from the speaker 2 back at least one microphone 4 is arranged, which faces the noise source. It is also possible to arrange a plurality of loudspeakers 2 and / or microphones 4 in an anti-noise module 12. The depth of the antisound module 12 is primarily determined by the dimensions of the or - if several are used - Loudspeaker 2 conditionally. Exemplary dimensions of an antisound module 12 with a speaker 2 are 150x100mm, with a depth of 30-50mm or less. As such speakers 2 are cheap, small, flat speakers with good performance, especially at lower frequencies, and with, for example, a power rating of 4W and a nominal impedance of 8 ohms, which, however, as the reverse side relatively large deviations of the phase and the amplitude have the frequency characteristic. These deviations were elaborately and innovatively compensated in the development by filters. With the exception of four soldering operations for the power supply of the individual loudspeakers 2, the anti-noise module 12 can either be assembled loosely or its components can be glued together with inelastic superglue. All components are optimally matched to achieve the necessary effectiveness. The individual anti-noise components ANC or anti-noise units 12 can be interconnected by current-conducting, relatively stable and, above all, viable copper strips. This is done exclusively by punching operations to adjust the copper bands, for example, two to four per board. The individual anti-sound modules are thus connected with thin copper strips, the ends of which can be firmly connected by punching with the anti-noise modules 12 and then these copper strips act both as fastening strips as well as on the other hand simultaneously as electrical supply lines.

In a first embodiment of the anti-sound module 12 for the planar element, a volume control via remote control by radio or cable is provided. In another embodiment of the antisound module 12, the volume, that is to say practically the amplification of the microphone signal, is fixed during production. On a circuit board 1 is an electrical circuit, which will be described below.

2 shows the block diagram of this electrical circuit for the anti-sound modules, which can be integrated into a planar element. This circuit is equipped with low-cost surface-mounted devices, ie SMD components, including microphone. The microphone 4, for example a unidirectional audio microphone such as the AUM-5047L-3-LW100-R from PUI Audio, 3541 Stop Eight Rd. In Dayton, OH 45414, USA, feeds a preamplifier 6, which is connected via a filter / matching circuit 7 and a volume control 8 to an output stage 9. The latter supplies the phase-shifted, the noise level adjusted output signal to the speaker 2, which has already been shown in Figure 1. The electrical circuit may be formed entirely or partially as an integrated circuit (IC) on a circuit board 1 or constructed of commercially available electronic components. Only (or with a few exceptions) favorable SMD components including a microphone are used. In a variant, the anti-noise module 12 may consist solely of a suitably shaped circuit board 1, which is equipped with the various SMD components, so also serves as a holder for the speaker 2, to save costs and weight. In this embodiment, no actual closed housing, but a lid 26 and a plate 29 is required to accommodate the individual components or components.

The microphone 4 is, as mentioned in the above description of Figure 1, arranged on the opposite side of the speaker 2 of the anti-ballast module 12. The use of a directional microphone, or a microphone with a relatively narrow directional characteristic is recommended in order to exclude or minimize the acoustic feedback with the speakers 2 housed in the same anti-noise module 12. Despite the phase shift of the acoustic output signal, that is the anti-noise, this possible feedback must be avoided because of the relatively broadly used frequency band, usually up to 2000 Hz.

The filter / matching circuit 7 preferably contains a low-pass filter with an upper limit frequency of, for example f _g = 2kHz, as well as other filters, the phase and amplitude characteristics of the amplification circuit and in particular the phase and amplitude characteristics of the speaker or the second compensate. As a result, the required phase rotation of - in the best case - 180 degrees generated. Experiments showed that with a phase shift of about 180 degrees at 703.2 Hz a maximum sound reduction of up to 20 dB can be achieved.

The volume controls the volume control 8 preferably non-linear with the help of the external power supply, namely by means of the supply circuit 10. Dabei a minimum power consumption is sought since, if necessary, a plurality of anti-sound modules 12, for example 50 anti-sound modules 12 in a planar element, must be supplied. As mentioned in connection with Figure 1, however, can also be a manual or preset volume control.

The output stage 9 is designed in the example for about 4W. With this power, an 8 ohm speaker 2 is operated as an example, e.g. Type SC 4.9 FL from VISATON GmbH & Co. KG., Ohligser Str. 29-31, D-42781 Haan, Germany. This 4W loudspeaker is characterized by a small size with external dimensions of 90 mm x 40 mm and above all a depth of only 14 mm, making it possible to realize a rather flat, lightweight anti-static module 12. Of course, similar speakers can be used, possibly even more compact. Overall, then brings a complete single AntischaNmodul 12 of this type less than 200 grams on the scales, namely only 150 grams. This low weight makes it possible to integrate the anti-ballast modules 12 in a multitude in a textile curtain, a slatted curtain or other planar elements.

The power supply of the anti-noise modules 12 of the planar element is carried out with low-voltage voltage via two electrical supply cable with a single volume control for the entire installation, either via an external port not shown here, or it is a battery or a battery in AntischaNmodul 12 is provided , and the low voltage voltage is sourced from a battery or a rechargeable battery. Similarly, an external connection can be provided if a wired volume control is used.

FIG. 3 shows a further embodiment of a single antisoll module 12 for a curtain as a planar element. In this embodiment, in the AntischaNmodul 12 except the speaker 2 and the circuit board 1 two microphones 4 and 4 'are arranged, the microphones as shown in Figure 1 opposite the speaker 2. Thereby, the electrical circuit on the circuit board 1 can transmit to the speaker 2 a more balanced signal to produce the anti-sound. The distance between microphone and loudspeaker results in a phase shift with sound falling diagonally from above or below between the location of the microphone and the loudspeaker. By suitable interconnection of two microphones 4, 4 'with the same distance to the speaker 2, this phase shift can be compensated. Alternatively, combinations of four microphones and one speaker are possible, or two microphones with two speakers. Other combinations are possible.

Figure 4 illustrates a typical arrangement of the anti-noise modules 12 in a curtain as a sheet-like element 24, suitable for the equipment of a double-winged, fully opened window 13 or a corresponding opening. In the interior, arranged substantially centrally within the window 13, five rows of five vertically interconnected anti-noise modules 12 integrated in the curtain. The anti-sounding speaker 2 are shown schematically. The anti-noise modules 12 are hung on optically hardly noticeable wires 1 1 as simultaneous supply lines or connected to each other. Depending on the design of the anti-noise modules 12 - as described above - these wires 1 1 also serve for switching on and off, for control / regulation, in particular volume control and / or power supply of the anti-noise modules 12. Number and arrangement of the anti-noise modules 12, here in a 5x5 -Raster are of course free and are chosen so that the desired degree of noise cancellation or noise reduction is achieved over the desired frequency range. Thus, it is quite possible to arrange a corresponding number of anti-noise modules 12 only on the edge of a window sash, as shown in Figure 7 and according to the accompanying description, for example, to save costs and the viewing through the window unnecessarily obstruct, albeit so desired noise suppression or noise reduction is achieved.

Figures 5 and 6 show schematically the operation in different directions and properties (eg static versus dynamic) of the incident noise. The planar element 24 according to the invention as a soundproofing arrangement, here in the form of a curtain with self-sufficient anti-noise modules 12, allows the dynamics of the noise to be corrected, for example noise, to be corrected of a passing car, to "empathize" and to achieve a suitable compensation.

5 shows vertically incident from outside incident noise 14 with incident direction 17, which penetrates through a window or opening. Shown are the boundary walls 13 of the window, and at the edges of the incident sound is partially diffracted, after which it is diffracted noise 15. The anti-noise modules 12 of the planar element 24 produce a uniform anti-noise 16, which is superimposed with 180 degrees phase shift of the incident noise 15 and thus achieves the desired noise reduction.

Figure 6 shows obliquely incident from outside noise 14 'with incident direction 17', which penetrates through the window or an opening. The opening is in turn represented by the boundary walls 13. In the interior of the noise occurs with diffracted Störschallwellen 15 'on. The anti-sound modules 12 generate a spatial dynamics matched anti-sound 16 ', which is superimposed with 180 degrees phase shift the Störschallwellen 15' and thereby achieves the desired noise reduction. Due to the distribution of the anti-noise modules 12 in the planar element 24, the phase difference of the incident noise waves - for example between the left and right edge of the window or the opening - is taken into account in the generation of the anti-noise.

As mentioned above, a single antisound module 12 is about 150 mm x 100 mm in size, with a depth or thickness of 30-50 mm or less. The horizontal and / or vertical arrangement should provide an anti-noise module 12 approximately every 100 mm to 200 mm. This depends essentially on the overall arrangement of the antisound modules 12 in the planar element 24, which is also dependent on the frequency range to be compensated, for example in a curtain. In a slatted curtain, as shown and described below, for example, such an arrangement is provided.

Figure 7 shows an example of an application for a tilted, so not fully open window 18, for a door or a passage between two rooms, for example, provided with a sound-absorbing curtain as a planar element 24 is. Since the noise enters the interior to be protected primarily through openings, thanks to the modular structure, these can be purposefully covered with the planar element 24 according to the invention in the form of a curtain and thus the noise can be reduced effectively and inexpensively, ie with fewer anti-static modules 12. When shown in Figure 7, only tilted and thus not fully open window 18, only those areas that are directly in front of the openings need to be equipped with AntischaNmodulen 12. The inverted U-formation of the anti-sound modules 12 fulfills this requirement. Of course, the anti-noise arrangement must leave enough room in a door or passage for people to pass through.

It is advantageous to connect the anti-noise modules 12 within the sheet-like element 24 or curtain by a suspension with each other, which ensures both the mechanical stability and includes the power supply and optionally the volume control. In most cases, it will be advantageous to make this suspension overall flexible, such as by the use of cables or wires as connecting elements. For design considerations, the anti-ballast modules 12 can be assembled as dummies or combined with a particular kind of curtain or integrated into a special curtain, for example a louvered curtain.

In Figure 8, an example of such a slatted curtain is shown. In a fabric or fabric 25 a the length of the web 25 corresponding number of AntischaNmodulen 20 is fixedly arranged, for example, sewn or glued in elongated pockets, possibly supplemented by an additional shaping plastic or light metal frame. This track 25 with the anti-skid modules 20 forms a lamella 19, similar to those used in vertical slat curtains. In the example shown, the antisound modules 20 show a lenticular or oval cross-section. The antisound modules 20 are electrically connected in parallel to one another via cable 21 for the power supply and / or regulation of the volume. The upper suspension 22 is formed in addition to the mechanical fastening as a supply line, so that the power supply and / or the control can be carried out electrically transmitted. Likewise, the curtain rail 23 is designed so that in addition to the displacement and rotation of the slats and the power supply and / or the regulation is possible. Both are only indicated in Figure 8, as well as a second blade 19 ', which may also be equipped with anti-ballast modules. Of course, module slats can be arranged alternately with slats without anti-ballast modules, which then together form a total of the sheet-like element, or it can be any combination of module slats and slats without anti-noise modules are formed, according to the desired capacity of the noise compensation. This again shows the simple, even by non-professionals possible attachment of the inventive planar element or curtain as an anti-noise arrangement, the desired noise compensation once set during installation by simple trial and at a change in the noise conditions at any time easily and with little effort can be improved.

Instead of a louvered curtain provided with anti-noise modules, mobile partition walls with anti-ballast modules can also be realized as flat elements according to the invention and used in a similar manner. This would be useful, for example, if there are noisy machines in an open-plan office whose noise is to be compensated. Such designed as partitions planar elements have a similar structure as the previously shown embodiments of curtains and are therefore not explicitly shown. Mobile control or partitions as flat elements, which contain the anti-sound modules hidden at an optimized distance from each other, make it possible to protect certain room parts against noise in a flexible way, to ensure privacy and / or to contain sound reflections.

The same applies to a flat ceiling part or ceiling element or a flat wall part or wall element as a planar element with integrated anti-noise modules, with the example, noise can be compensated by a lying above the space concerned floor or from an adjacent room. For this purpose, such single or even several such ceiling or wall elements are installed. The anti-ballast modules can also be integrated in blinds or shutters, which then become flat elements with anti-sounding function. The skilled person will not be in difficulties with such implementations. In the following figures, not only a schematic representation of the individual components of such a sheet-like element is shown, but an example of an effective implementation of the sheet-like element with its anti-sound modules and the components thereof, as these components look or look. It is clear that the structure of the planar element as well as the individual anti-sound modules can be varied, and in particular their dimensions. But the structure of the sheet element presented here proves to be functional and suitable for the practice and suitable. First, Figure 9 shows a lid 26 for a single anti-sound module, as seen in its inside. It can be seen here a grid-like rib structure 5 to reinforce the rear wall. This cover 26 is intended to cover the back of the speaker. In FIG. 10, the lid 26 can be seen in a perspective view, seen on the inside of the rear wall, and in FIG. 11 it is shown looking at the outside of its rear wall. It is a molded plastic part.

As a further mounting part is a felt insert 28 with recess 34 as shown in Figure 12, which serves to attenuate the speaker vibrations. Further, the components of the anti-ball module 12 include a soft elastomer insert 27 as shown in Figure 13, where it is seen seen on its back. The inner portion 33 forms a recess, so a free passage, and at the four corners protrude arms 32 beyond the edge and these are pierced with pins 30 made of plastic or metal. In Figure 14, the smooth front of this elastomeric insert 27 is shown.

In Figure 15, the speaker 2 is shown in a perspective view, as it is suitable for installation in this anti-noise module. It is a particularly light and flat speaker 2. It measures, for example, 150 mm x 100 mm, with a depth of 30 mm to 50 mm or less, and with a nominal power rating of 4 W and a nominal impedance of 8 ohms. FIG. 16 shows this loudspeaker 2 shown on its rear side. It can be seen here the electrical part 38 of the speaker 2, and the figure 17 shows its front. The loudspeaker diaphragm 37 is provided with a soft, circumferential rubber lip 35 kept and stored. Next, a grid-like plate 29 is shown in a perspective view in FIG. 18, shown with a central recess 36 and in FIG. 19 in a plan view, and shown in FIG. 20 from the other side.

All of the above-mentioned and illustrated parts are assembled into a single antisound module 12, as shown in FIG. 21 and FIG. First, the felt insert 13 is slipped over the speaker 2 from behind, so that the electrical part 38 of the speaker 2 comes to rest in the recess 34 on the felt insert 28. This felt insert 28 serves to dampen the vibrations of the speaker 2 on its rear side. Afterwards, the plate 29 with recess 36 is placed over the front side of the loudspeaker, and then the elastomer insert 27 is fastened by means of its plug-in pins 30 to its arms 32 on the plate 29. The speaker 2 with plate 29 is placed with its front against the top, from which the sound is emitted, so with the visible in Figures 21 and 22 speaker diaphragm 37 on the recess provided for them on the circuit board 1, so that its speaker diaphragm 37 on the congruent Recess on the circuit board 1 comes to rest. The speaker 2 is then covered with the cover 26 from behind, this cover 26 (as well as the plate 29 on the opposite side of the circuit board 1) is glued to the circuit board 1. Outside the lid are then the various switching elements on the circuit board. 1 From such anti-noise modules 12 can be formed by connection to the fasteners 31, a whole chain. A plurality of such juxtaposed chains finally forms a planar element according to the invention and this can for example be integrated into a curtain made of cloth or other materials or the sheet-like element forms a curtain.

Since the operation of such a single anti-ballast module or a whole anti-noise arrangement of a plurality of anti-noise modules 12 in the form of a planar element can be limited to the time in which people are present in the space to be protected from the noise, a switched operation makes sense. In this case, the switching on and off of the antisound arrangement can be arranged by one or more in an antisound module or outside Motion detectors take place. A timer is also appropriate, which is not explicitly drawn in the figures. Such motion detectors or timers are commonly used for automatic light-on and light-off. The expert skilled worker does not make much effort to implement the inventive concept of a planar element with Anitschallmodulen 12 also differently than here explicitly described.

Therefore, the present invention has a relatively simple solution that can be installed with relatively little effort in particular also subsequently in interiors and which is adaptable to the specific noise situation.

Ziffemverzeichnis

1 circuit board

2 speakers

3 fastener / supply line

4 microphone

5 lattice-like rib structure

6 preamps

7 filter / fitting circuit

8 volume controls

9 power amplifier

10 supply circuit

1 1 wire, supply line

12 anti-sound module

13 boundary wall window

14, 14 'Störschall in Figure 5 and 6, respectively

15, 15 'diffracted noise in Figure 5 and 6, respectively

16, 16 'anti-sound in Figure 5 or 6th

17, 17 'direction of incidence noise in Figure 5 or 6th

18 open window

19 lamella

20 anti-sound module in cable 21

21 cables with anti-ballast modules 20

22 suspension, supply line

23 curtain rail

24 planar element in FIGS. 5, 6 and 7

25 planar element in FIG. 8

26 lids

27 Elastomer insert

28 felt insert

29 plate

30 pins

31 fastener for connecting and supplying individual

Anti sound modules Arms on elastomer insert 27

Recess on the elastomer insert

Recess at the felt insert

Rubber lip as speaker membrane holder Recess on the plate

Speaker cone

electrical part of the speaker 2

Claims

claims

1 . Flat element (24, 25), designed as a curtain for a window, as a partition or partition, as a ceiling part or wall part for active compensation of background noise in an interior, with a plurality of interconnected, similar AntischaNmodulen (12) with a microphone (4 ), an electronic circuit having a combination of filters (7) for adjusting phase and amplitude and an electronically controllable amplifier (6, 9) and a loudspeaker (2), characterized in that the planar element (24, 25) via its Width on several different lines each having a plurality of analog controllable AntischaNmodulen (12, 20) which are at most 50mm thick, at most 150 mm long and at most 100 mm wide, with a maximum weight of 200 grams per anti-noise module (12, 20), so that they are inconspicuously integrated into the planar element (24, 25) and together each have a chain of anti-static modules (12, 20) running along these lines Lden, which are arranged in succession on jointly connecting them electrical supply lines (3, 1 1, 22) in the form of only two along this line extending electrical cables, the chain with their supply lines (3, 1 1, 22) connected in parallel and is supplied by two electrical supply cables or supply rails (23) with a low voltage voltage, which run transversely to the lines of the chains.

2. Sheet-like element (24, 25) according to claim 1, designed as a curtain for a window characterized in that the curtain over its width on several different case lines each having a plurality of analog controllable AntischaNmodulen (12, 20), the inconspicuous are integrated into the curtain and together each form a falling hanging chain of AntischaNmodulen (12, 20), which together on them connecting electrical supply lines (3, 1 1, 22) in the form of only two longitudinally The chain with its supply lines (3, 1 1, 22) connected in parallel by two electrical supply cables or supply rails (23) is below a low-voltage voltage, which are transverse to the case-line extending electrical cables. Lines of falling chains are lost.

3. Flat element (24, 25) according to claim 1, designed as a control or partition wall, characterized in that in the partition wall or partition over its width or height distributed a plurality of parallel lines, each having a plurality of analog controllable anti-noise modules (12, 20th ) are integrated so that they are inconspicuously integrated into the control or partition wall and each together form a chain of anti-noise modules (12, 20), via common them connecting electrical supply lines (3, 1 1, 22) in the form of only two along the line of the chain extending electrical cables are arranged connected to each other, the chain with their supply lines (3, 1 1, 22) connected in parallel by two electrical supply cables or supply rails (23) is under a low-voltage voltage across the lines the chains are lost.

4. Sheet-like element (24, 25) according to claim 1, designed as a ceiling element, characterized in that in the ceiling element over its width or length or height distributed more parallel lines with a plurality of analog controllable anti-noise modules (12, 20) are integrated so that they are inconspicuously integrated into the ceiling element and each together form a chain of anti-sound modules (12, 20) which extend over common electrical connecting lines (3, 1 1, 22) in the form of only two along the line of the chain electrical cables are arranged connected to each other, wherein the chain with its supply lines (3, 1 1, 22) connected in parallel by two electrical supply cables or supply rails (23) are at a low voltage voltage which extend transversely to the lines of the chains.

5. Sheet-like element (24, 25) according to one of the preceding claims, characterized in that the amplifiers (6, 9) of the antisound modules (12, 20) to 4W and the loudspeakers (2) have a load capacity of 4W with an impedance of 8Ω, as well as external dimensions of 100mm x 50 mm and a depth of max. 20 mm.

Sheet-like element (25), designed as a curtain for a window or as a partition wall according to one of claims 1 to 3, characterized in that the curtain or the partition wall of a plurality of discrete, strip-shaped, hanging elements or about the vertical axis pivotable slats (19, 19 '), in each of which a chain of several parallel-powered anti-noise modules (20) is installed.

Sheet-like element (24), designed as a curtain for a window or as a partition wall according to one of claims 1 to 3, characterized in that the curtain or the control or partition wall is formed by a continuous flat or wavy curtain of fabric, in which a plurality of spaced-apart chains of a plurality of parallel-connected powered anti-noise modules (12) are installed.

Sheet-like element (24, 25), designed as a curtain for a window or as a control or partition wall according to one of claims 1 to 3, characterized in that the microphones (4, 4 ') of each anti-noise module (12, 20) on the curtain or the control or partition wall are aligned with their sensitive side to one side, so that the curtain or the control or partition wall with these sensitive sides of the microphones (4, 4 ') directed towards the noise source can be suspended or erected while the speakers (2) then directed towards the interior with the sound emitted by them.

Sheet-like element (24, 25) according to one of the preceding claims, designed as a curtain for a window, as a partition wall or as a ceiling part, characterized in that the electronic circuit of each anti-sounding anti-ballast module (12, 20) is optimized so that the electrical signals of the sound recorded by its microphone (4, 4 ') can be emitted by analogously generated 180 ° phase reversal with amplitude amplification to the associated loudspeaker (2), for maximum sound elimination on the sound emission side of the loudspeaker (2).

10. Sheet-like element (24, 25) according to one of the preceding claims, designed as a curtain for a window, as a partition wall or partition wall or as a ceiling part, characterized in that the antisound modules (12, 20) each have an electronic circuit, which is implemented wholly or partly as an integrated circuit, according to a block diagram, which includes a unidirectional audio microphone (4, 4 '), further each a preamplifier (6) via a filter / adjustment circuit and a respective volume control (8 ) is connected to an output stage (9) for generating and outputting electrical signals of the loudspeaker (2) which are phase-shifted by 180 ° in comparison to the electrical signals generated by the microphone (4, 4 ').

1 1. Sheet-like element (24, 25) according to one of the preceding claims, designed as a curtain for a window, as a partition wall or partition or ceiling part, characterized in that the anti-noise modules (12, 20) have an electronic circuit which is wholly or partly is designed as an integrated circuit and a low-pass filter (7) with an upper limit frequency of 2kHz includes, as well as other filters that compensate for the phase and amplitude characteristics of the amplification circuit and the speaker or the.

12. A sheet-like element (24, 25) according to any one of the preceding claims, characterized in that the individual anti-sound modules (12, 20) have a circuit board (1) and plastic elements (26, 29) which surround the loudspeaker (2), the electronic circuit and at least two spaced apart from each other and the speaker (2) microphones (4, 4 ') include, with the circuit, the phase shift of the signals of the microphones (4, 4') at different directions of the incoming sound is compensated and then this compensated signals with 180 ° rotated phase to the speaker (2) can be issued.

13. anti-noise module (12, 20) for installation in a planar element (24, 25) according to one of the preceding claims for the active compensation of background noise in an interior by noise compensation, characterized in that this anti-chip module (12, 20) has only one printed circuit board (1) and at least one microphone (4) oriented on one side of the printed circuit board (1) and at least one loudspeaker (2) directed in the opposite direction, and at least one preamplifier (6) connected via a filter / matching circuit (7) and a volume control (8) to an output stage (9) connected to the loudspeaker (2) and to electrical terminals for parallel connection to two electrical conductors, and that this anti-chip module (12, 20) is at most 50mm thick, at most 150mm long and at most 100mm wide, and has a maximum weight of 200 grams.

14. Antisound module (12, 20) for installation in a planar element (24, 25) according to one of claims 1 to 12 for active compensation of background noise in an interior space by noise compensation, characterized in that this AntischaNmodul (12, 20) has stabilizing, protective and anti-sound optimizing plastic elements (26, 29), and at least one on one side of the board (1) aligned microphone (4) and at least one directed in the opposite direction speaker (2) is mounted, and at least one preamplifier (6) connected via a filter / matching circuit (7) and a volume control (8) to an output stage (9) connected to the loudspeaker (2) and to electrical terminals for parallel connection to two electrical conductors, and that this anti-chip module (12, 20) is at most 50mm thick, at most 150mm long and at most 100mm wide, and has a maximum weight of 200 grams.

15. anti-sound module (12, 20) for installation in a planar element according to one of claims 1 to 12 for the active compensation of background noise in an interior by noise compensation, characterized in that the electrical circuit of the anti-ballast module (12, 20) a complete or partially integrated circuit, equipped with SMD components including a unidirectional audio microphone, and that the speaker (2) with its loudspeaker diaphragm (37) in the recess (36) of a, on the front side of the circuit board (1) glued plate (29 ) is positioned and on the plate (29) an elastomeric insert (27) with plug pins (32) inserted and is glued, while on the back of the speaker (2) and over its electrical part (38) a felt insert (28) is slipped, and then a lid (6) with rib-reinforced rear wall on the back of the speaker (2) on the Glued circuit board (1), which is intended to act as a sound box for the inboard loudspeaker (2), and that the anti-noise module (12) together with the circuit board (1), plate (29) and cover (26) in total at most 50mm thick and at most 150 mm long and at most 100 mm wide, with a maximum weight of 200 grams, with a flat speaker (2) with 4W nominal power, 8 ohms nominal impedance, 120 to 20Ό00 Hz frequency range.