EP1078553B1 - Sound reproduction device working according to the bending wave principle - Google Patents

Sound reproduction device working according to the bending wave principle Download PDF

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Publication number
EP1078553B1
EP1078553B1 EP99952146A EP99952146A EP1078553B1 EP 1078553 B1 EP1078553 B1 EP 1078553B1 EP 99952146 A EP99952146 A EP 99952146A EP 99952146 A EP99952146 A EP 99952146A EP 1078553 B1 EP1078553 B1 EP 1078553B1
Authority
EP
European Patent Office
Prior art keywords
sound
panels
driver
panel
drivers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99952146A
Other languages
German (de)
French (fr)
Other versions
EP1078553A1 (en
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Audio Electronic Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harman Audio Electronic Systems GmbH filed Critical Harman Audio Electronic Systems GmbH
Publication of EP1078553A1 publication Critical patent/EP1078553A1/en
Application granted granted Critical
Publication of EP1078553B1 publication Critical patent/EP1078553B1/en
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/045Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/025Magnetic circuit

Definitions

  • the invention is concerned with the formation of sound reproduction arrangements, that work on the principle of flexible shafts, especially with the improved exploitation of such Arrangements for areas provided for sound generation.
  • sound reproduction devices are known that work on the principle of bending waves.
  • Such Arrangements are known for example from WO-A-97/09861 and are essentially from a sound panel with a Core layer and with at least one cover layer and at least an attached or integrated drive system formed, the sound panel vibrating is when the drive system (s) electrical audio frequency signals are fed.
  • Characteristic of such Sound reproduction arrangements is that from a lower cut-off frequency, the so-called critical frequency, a "bending wave radiation" is possible, the bending waves in the Level of the respective sound panel to a sound radiation lead with frequency-dependent direction.
  • a section through a created directional diagram shows a Main lobe, the direction of which depends on the frequency.
  • the sound panel is built on the sandwich principle by two opposing surfaces one very light core layer each with a thin top layer are connected by gluing, for example. So that Sound panel has good sound reproduction properties, must the material for the top layer has a particularly high expansion shaft speed to have.
  • Suitable cover layer materials are, for example, thin ones Metal foils or fiber-reinforced plastic foils.
  • the core layer There are also special requirements for the core layer. So it is necessary that the usable materials initially a low mass density and low damping exhibit. You also need the materials for the core layer the highest possible shear modulus perpendicular to the 0 surfaces have, which are provided with the cover layers. Finally, it is necessary that those usable for core layers Materials in the direction in which the core layer formed from this material is its largest Has a very low modulus of elasticity. This related to the last two requirements at first glance, contradictory prerequisites are most likely met by a core layer that has a hole structure with between the two for coating with the top layers provided surface-running openings with preferably a small cross section.
  • Core layer materials can be used because they are isotropic Material properties still suitable shear and Have moduli of elasticity. Not to be neglected in this connection remains that when using rigid foams the cover layers as the material for the core layer have the task of ensuring the required anisotropic behavior of the To produce sound panels.
  • the sound panels are driven by drivers that - as shown in DE-A-197 57 097 - either to the respective Sound panel can be attached or integrated into this.
  • the invention has for its object a sound panel to indicate which, with the same space requirement, the acoustic Short circuit reduces or excludes and at the same time the area of the Sound panels for increasing the sound level or expanding the Exploits the frequency range.
  • the sound panels and / or the frame with sound outlet openings equip.
  • the between the Sound panels and space formed as a frame as bass reflex volume and the respective sound outlet opening as a bass reflex opening be designed. It is also possible to join the To connect a transmission line to the sound outlet.
  • the invention Arrangement not only on pure bass reproduction is fixed. Rather, a combined arrangement can also be implemented, where a sound panel along with the one above space that has already been mentioned several times, mainly for use is designed for bass reproduction while the other Sound panel then for the reproduction of the mid / high range, for example is optimized.
  • the latter closes according to Claim 8 one that the two sound panels according to material and / or dimensions for their respective transmission ranges are optimized and therefore, for example in their thickness, the core layer material and / or the used Can distinguish top layers. That the sound panel, which is intended for bass reproduction, in contrast on the other sound panel not directly facing the listener is meaningless because human hearing for Frequencies less than 100 Hz only has a poor location.
  • driver that drives the sound panel at the same time as a counter bearing for the one driving the other sound panel Driver.
  • Such training is therefore particularly important advantageous if the connected drivers which are the different Drive sound panels, operated electrically in parallel and thus swing in opposite directions.
  • connected drivers are designed as a common driver. This includes arrangements, their common Components and magnetic circuits for driving both in mutual Distance A arranged sound panels contribute.
  • the drivers are not connected to the Sound panels, but on the elements (frame and / or springs) are attached. Through this type of driver storage it is ensured that the bending wave propagation in the sound panels due to mass load not or only slightly is affected or no damping influences from the drivers are caused.
  • the side section shown in Figure 1 shows a sound reproduction arrangement 10, which is essentially from a front Sound panel 11.1, a rear sound panel 11.2, three Drivers 12 (12.1, 12.2, 12.3) and a frame 13 are formed becomes.
  • the two sound panels 11.1, 11.2, which are in mutual Distance A are arranged at their edges 14 connected to the frame 13. Even if the connection between Frame 13 and the sound panels 11.1, 11.2 as rigid Connection is formed in another - not illustrated embodiment between the frame 13 and the sound panels 11.1, 11.2 a bead - as z. B. in one under the filing date of this application for the applicant deposited application is shown - be arranged.
  • two of the three drivers 12 are backs used on the back. These two are completely identical Drivers 12.1, 12.2, which are only shown schematically formed as ferrite systems in this embodiment and via the voice coil bobbin 26 with the respective sound panel 11.1, 11.2 connected.
  • both sound panels 11.1, 11.2 deformed in opposite directions. This deformation of the two sound panels 11.1, 11.2 causes that the sound display assembly 10 like a breathing ball or wall works.
  • the sound reproduction arrangement 10 shown in FIG. 1 as a bass reproduction arrangement is designed.
  • An acoustic short circuit between the surfaces coupled directly to the listening room 16 of the two sound panels 11.1, 11.2 is excluded, because under the influence of the sound signals the two sound panels 11.1, 11.2 related to the center line shown in move in opposite directions and into space 15 radiated sound energy through the sound panels 11.1, 11.2 and the frame 13 is separated from the listening room 16.
  • the sound energy radiated into the interior of the room 15 for sound reinforcement of the listening room 16 can be used with that Volume of the room 15 used as a so-called bass reflex volume be by the interior of the room 15 by means of at least a sound outlet opening 17 connected to the listening room 16 becomes.
  • Even if in the exemplary embodiment according to FIG Sound outlet opening 17 is formed in the frame 13 can in another - not shown - embodiment the sound outlet opening also in a sound panel be let in.
  • a resilient element is in the interior of the room 15 18 used, which the two at a mutual distance A arranged sound panels 11.1, 11.2 at the connection points 19 additionally supported against each other.
  • the resilient element 18 also a certain Filter effect on those to be emitted by the sound panels 11.1, 11.2 Exert sound waves.
  • a driver is designated, which in the sound panel 11.2 is embedded and which is designed as a piezo driver is.
  • This driver 12.3 can be used for radiation, for example high-frequency sound signals used by the sound panel 11.2 his. Because in contrast to low-frequency sound waves higher-frequency sound waves have a directional characteristic, should the sound panel 11.2 with the driver 12.3 the sound reproducing arrangement 10 of the interceptor in the interception room 16 face directly.
  • FIG. 2 there is a sound reproduction arrangement 10 shown in more detail.
  • Figure 2 can be seen that the two sound panels 11.1, 11.2 each a core layer 20 with a honeycomb structure and two cover layers 21 are formed.
  • this is implemented that an annular permanent magnet 22 is present whose respective pole faces N, S are connected to a pole disk 23 are provided in a circular ring shape.
  • the frame from the Permanent magnet 22 and the pole disks 23 unit formed with lateral distance a pole core 24.
  • the edges of the two voice coil bobbins 26 are each provided with a voice coil 27 and immerse in the Gap between the pole core 24 and the permanent magnet unit 22 and respective pole disk 23.
  • a permanent magnet 22 from a Rare earth alloy used in the form of a neodymium alloy has been.
  • further permanent magnets connected to the common driver 12.4 be, for example, part 24.1 of the pole core 24 is formed from a permanent magnetic material.
  • the sound reproduction arrangement 10 has no sound outlet opening 17 which connects the room 15 to the listening room 16, the room 15 should be at least partially filled with a sound-absorbing material (not shown).
  • the pole core 24 in the exemplary embodiment shown in FIG. 2 does not necessarily have to be connected to the permanent magnet 22 via the holding member 25.1, but can also be connected to the sound panels 11.1, 11.2 in another exemplary embodiment. To avoid damping, the connection between the pole core 24 and the sound panels 11.1, 11.2 should be elastic.
  • a common driver 12.4 is shown in FIG modified compared to driver 12.4 according to FIG. 2.
  • This driver 12.4 (FIG. 3) also has an annular shape trained permanent magnets 22 and two with voice coils 27 provided voice coil former 26. Contrary to the training According to FIG. 2, however, in the embodiment according to FIG completely on so-called inference parts in the form of Pole discs and pole core are dispensed with. Instead it is done in the arrangement according to FIG. 3, the conclusion is exclusively over the air distance between the two poles N, S of the radially magnetized permanent magnet 22. In detail this is solved so that the permanent magnet 22 via a holding member 25.3 is connected to the sound panel 11.2.
  • the Voice coil 27 ' which with the voice coil support 26 is connected to the sound panel 11.1 is the retired Sound reproduction arrangement 10 the north pole N of the radially magnetized Permanent magnets 22 with close lateral spacing, while the other voice coil 27 '' the south pole S of the permanent magnet 22 also arranged at a lateral distance is.
  • the sound reproduction arrangement shown in FIG 10 to specifically emphasize different Frequency ranges used by the two sound panels 11.1, 11.2 become. If the sound reproduction arrangement 10 according to Figure 3 with different in both sound panels 11.1, 11.2 emphasized frequency ranges, the two should Sound panels 11.1, 11.2 for the respective frequency ranges optimized with respect to the cover layers 21 or core layers 20 be trained.
  • the driver points 12.4 according to FIG. 4 pole disks 23, although there too Conclusion between the two poles N, S of the permanent magnet 22 takes place over the air. So they have the pole faces N, S of the axially magnetized permanent magnet 22 connected Pole discs not a direct inference effect, but only contribute to a concentration effect of the permanent magnet 22 field lines provided on the voice coils 27 'and 27' 'at.
  • Embodiments are in the embodiment 4 to the provision of a separate voice coil former waived. Instead are the voice coils 27 ', 27 "connected to the edges 28 of cutouts 29, embedded in each of the two sound panels 11.1, 11.2 are.
  • the one from the permanent magnet 22 and the two pole disks 23 formed driver 12.4 is in the gap A using the Cutouts 29 used.
  • holding links 25.4 which in another - not shown - Embodiment also of the respective sound panel 11.1 or 11.2 itself by means of a corresponding milling 29 It is essential that they be provided greatest possible lateral distance A 'between the voice coils 27 ', 27' 'and the respective connection points of the Sound panels 11.1, 11.2 with the drivers 12 have one particularly good force impression in the sound panels 11.1, 11.2 to reach.
  • Figure 3 can also between the voice coil bobbin 26, which is connected to the sound panel 11.2 is, and the sound panel 11.2 an additional support member (not shown), which compared to the named voice coil former 26 has a reduced diameter his.
  • FIG. 6 To reduce and increase magnetic resistance the driving force in FIG. 6 is one compared to FIG. 4 modified driver 12.4 shown.
  • This driver 12.4 will essentially of three axially magnetized permanent magnetic disks 22.1 to 22.3, two pole disks and a return tube 30 formed.
  • the two pole faces N, S of the permanent magnet 22.2 are connected to the two pole disks 23.
  • FIG. 12.4 will essentially of three axially magnetized permanent magnetic disks 22.1 to 22.3, two pole disks and a return tube 30 formed.
  • the two pole faces N, S of the permanent magnet 22.2 are connected to the two pole disks 23.
  • FIG. 6 also shows that the permanent magnets 22.2 and 22.3, which directly with the bottoms 31 of Cutouts in the sound panels 11.1, 11.2 are connected, compared to the pole disks 23 a reduced diameter to have. Is the imprint of bending waves in the sound panels 11.1, 11.2 can be further improved in one other - not shown - embodiment between respective floor 31 and permanent magnets 22.1, 22.2 also as shown in Figure 4, a holding member (25.4) with respect to Permanent magnets 22.1 and 22.3 arranged reduced diameter become.
  • Figure 5 shows two spaced A apart Sound panels 11.1, 11.2, each of which has a driver 12.1, 12.2 and a voice coil bobbin 26 with arranged thereon Have voice coil 27 ', 27' '.
  • the mutual arrangement driver 12.1, 12.2 and voice coil former 26 or Voice coil 27 ', 27' ' is selected so that with the sound panel 11.1 voice coil with physical connection 27 "in the pan-shaped and connected to the sound panel 11.2 trained driver 12.2 and the voice coil 27 'in engage the driver 12.1 on the sound panel 11.1.
  • the one in figure 5 nonexistent mutual support of the two drivers 12.1, 12.2 is compensated for by the fact that the drivers 12.1, 12.2 or better their permanent magnets 22 as seismic masses provide a sufficient counter bearing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Building Environments (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Description

Technisches GebietTechnical field

Die Erfindung befaßt sich mit der Ausbildung von Schallwiedergabeanordnungen, die nach dem Biegewellenprinzip arbeiten, insbesondere mit der verbesserten Ausnutzung der von solchen Anordnungen zur Schallerzeugung bereitgestellten Flächen.The invention is concerned with the formation of sound reproduction arrangements, that work on the principle of flexible shafts, especially with the improved exploitation of such Arrangements for areas provided for sound generation.

Stand der TechnikState of the art

Gemäß dem Stand der Technik sind Schallwiedergabeanordnungen bekannt, die nach dem Biegewellenprinzip arbeiten. Derartige Anordnungen sind beispielsweise aus der WO-A-97/09861 bekannt und werden im wesentlichen von einem Klangpaneel mit einer Kernschicht und mit wenigstens einer Deckschicht und von wenigstens einem angesetzten oder integrierten Antriebssystem gebildet, wobei das Klangpaneel in Schwingungen versetzt wird, wenn dem oder den Antriebssystem(en) elektrische Tonfrequenzsignale zugeführt werden. Charakteristisch für solche Schallwiedergabeanordnungen ist, daß ab einer unteren Grenzfrequenz, der sogenannten kritischen Frequenz, eine "Biegewellenabstrahlung" möglich wird, wobei die Biegewellen in der Ebene des jeweiligen Klangpaneels zu einer Schallabstrahlung mit frequenzabhängiger Richtung führen. Mit anderen Worten, ein Schnitt durch ein erstelltes Richtdiagramm zeigt eine Hauptkeule, deren Richtung frequenzabhängig ist. Diese Verhältnisse sind für unendlich ausgedehnte Platten und Absorberplatten vollständig gültig, während die Verhältnisse für die in dieser Anmeldung behandelten Multiresonanzplatten (auch Distributed Mode Loudspeaker genannt) wegen der starken Randreflexe dann deutlich komplexer sind. Diese Komplexität bei Multiresonanzplatten rührt daher, daß die genannte Hauptkeule mit frequenzabhängiger Richtung von einer Mehrzahl weiterer solcher Hauptkeulen überlagert wird, so daß ein stark aufgefächertes Richtdiagramm entsteht, welches außerdem sehr frequenzabhängig ist. Typische Kennzeichen der hier behandelten Multiresonanzplatten ist, daß ihre Richtdiagramme im Mittel eher von der Mittelsenkrechten weg weisen. Dieses Verhalten bewirkt, daß der Raum stärker in die Projektion der Schallwellen einbezogen wird.According to the prior art, sound reproduction devices are known that work on the principle of bending waves. such Arrangements are known for example from WO-A-97/09861 and are essentially from a sound panel with a Core layer and with at least one cover layer and at least an attached or integrated drive system formed, the sound panel vibrating is when the drive system (s) electrical audio frequency signals are fed. Characteristic of such Sound reproduction arrangements is that from a lower cut-off frequency, the so-called critical frequency, a "bending wave radiation" is possible, the bending waves in the Level of the respective sound panel to a sound radiation lead with frequency-dependent direction. In other words, a section through a created directional diagram shows a Main lobe, the direction of which depends on the frequency. These relationships are for infinitely extended plates and absorber plates fully valid while the ratios for the multi-resonance plates discussed in this application (also called Distributed Mode Loudspeaker) because of the strong Edge reflexes are then significantly more complex. That complexity in multi-resonance plates is due to the fact that the main lobe mentioned with frequency-dependent direction from a plurality of others such main lobes is superimposed, so that a strong fanned pattern, which is also very is frequency dependent. Typical characteristics of those dealt with here Multi-resonance plates is that their directional diagrams on average rather point away from the perpendicular. This behavior causes the room to project more into the Sound waves is included.

Das Klangpaneel ist nach dem Sandwich-Prinzip aufgebaut, indem zwei einander gegenüberliegende Oberflächen einer sehr leichten Kernschicht jeweils mit einer dünnen Deckschicht beispielsweise durch Verklebung verbunden sind. Damit das Klangpaneel gute Schallwiedergabeeigenschaften aufweist, muß das Material für die Deckschicht eine besonders hohe Dehnwellengeschwindigkeit haben.The sound panel is built on the sandwich principle by two opposing surfaces one very light core layer each with a thin top layer are connected by gluing, for example. So that Sound panel has good sound reproduction properties, must the material for the top layer has a particularly high expansion shaft speed to have.

Geeignete Deckschichtmaterialien sind beispielsweise dünne Metallfolien oder auch faserverstärkte Kunststoffolien.Suitable cover layer materials are, for example, thin ones Metal foils or fiber-reinforced plastic foils.

Auch an die Kernschicht werden besondere Anforderungen gestellt. So ist es notwendig, daß die einsetzbaren Materialien zunächst eine geringe Massendichte und eine geringe Dämpfung aufweisen. Außerdem müssen die Materialien für die Kernschicht einen möglichst hohen Schermodul senkrecht zu den 0-berflächen haben, die mit den Deckschichten versehen werden. Schließlich ist es notwendig, daß die für Kernschichten verwendbaren Materialien in der Richtung, in welcher später die jeweils aus diesem Material gebildete Kernschicht ihre größte Ausdehnung hat, einen sehr geringen Elastizitätsmodul besitzen. Diese in bezug auf die beiden letzten Anforderungen auf den ersten Blick widersprüchlichen Voraussetzungen werden am ehesten von einer Kernschicht erfüllt, die eine Lochstruktur mit zwischen den beiden für die Beschichtung mit den Deckschichten vorgesehenen Oberflächen verlaufenden Durchbrüchen mit vorzugsweise geringem Querschnitt aufweist. Neben den Kernschichten mit der Lochstruktur sind auch Hartschäume als Kernschichtmaterialien einsetzbar, weil diese trotz ihrer isotropen Materialeigenschaften immer noch geeignete Scherund Elastizitätsmodule aufweisen. Nicht unerwähnt soll in diesem Zusammenhang bleiben, daß bei der Verwendung von Hartschäumen als Material für die Kernschicht die Deckschichten die Aufgabe haben, das geforderte anisotrope Verhalten des Klangpaneels herzustellen.There are also special requirements for the core layer. So it is necessary that the usable materials initially a low mass density and low damping exhibit. You also need the materials for the core layer the highest possible shear modulus perpendicular to the 0 surfaces have, which are provided with the cover layers. Finally, it is necessary that those usable for core layers Materials in the direction in which the core layer formed from this material is its largest Has a very low modulus of elasticity. This related to the last two requirements at first glance, contradictory prerequisites are most likely met by a core layer that has a hole structure with between the two for coating with the top layers provided surface-running openings with preferably a small cross section. In addition to the Core layers with the perforated structure are also considered rigid foams Core layer materials can be used because they are isotropic Material properties still suitable shear and Have moduli of elasticity. Not to be neglected in this connection remains that when using rigid foams the cover layers as the material for the core layer have the task of ensuring the required anisotropic behavior of the To produce sound panels.

Der Antrieb der Klangpaneele erfolgt mittels Treibern, die - wie in DE-A-197 57 097 gezeigt - entweder an das jeweilige Klangpaneel angesetzt oder in diesem integriert werden.The sound panels are driven by drivers that - as shown in DE-A-197 57 097 - either to the respective Sound panel can be attached or integrated into this.

Sollen mit den vorbezeichneten Klangpaneelen vor allem tieffrequente Tonsignale wiedergegeben werden, so hat sich gezeigt, daß zur Verringerung des akustischen Kurzschlusses besondere Maßnahmen ergriffen werden müssen. Im einfachsten Fall kann dies mittels einer ausreichend großen Schallwand realisiert werden, in die das Klangpaneel eingebaut wird. Abgesehen davon, daß die Schallwand einen zusätzlichen Kostenfaktor darstellt, wird durch diese Maßnahme auch die potentiell zur Schallabstrahlung zur Verfügung stehende Fläche des Klangpaneels reduziert.Especially with the aforementioned sound panels should be low-frequency Sound signals are reproduced, it has been shown that special to reduce the acoustic short circuit Measures need to be taken. In the simplest This can be done using a sufficiently large baffle can be realized in which the sound panel is installed. apart that the baffle is an additional cost factor represents, this measure also potentially area of the Sound panels reduced.

Daher liegt der Erfindung die Aufgabe zugrunde, ein Klangpaneel anzugeben, welches bei gleichem Platzbedarf den akustischen Kurzschluß reduziert bzw. ausschließt und gleichzeitig die zur Schallabstrahlung zur Verfügung stehende Fläche des Klangpaneels zur Schallpegelerhöhung bzw. Erweiterung des Frequenzbereichs ausnutzt.Therefore, the invention has for its object a sound panel to indicate which, with the same space requirement, the acoustic Short circuit reduces or excludes and at the same time the area of the Sound panels for increasing the sound level or expanding the Exploits the frequency range.

Darstellung der ErfindungPresentation of the invention

Diese Aufgabe wird mit den Merkmalen gemäß Anspruch 1 gelöst. Vorteilhafte Aus- und Weiterbildungen der Erfindung sind den abhängigen Ansprüchen entnehmbar.This object is achieved with the features according to claim 1. Advantageous further developments of the invention are the dependent claims can be removed.

Werden zwei Klangpaneele in gegenseitigem Abstand A zueinander angeordnet und von einem Rahmen umgeben, wird zwischen den beiden Klangpaneelen und dem Rahmen ein Raum gebildet, welcher die in diesem Raum abgestrahlten Schallwellen von der Schallwellen separiert, die von den beiden einander abgewandten Oberflächen der Klangpaneele abgegeben werden. Werden die Treiber, welche die beiden in gegenseitigem Abstand A angeordneten Klangpaneele antreiben elektrisch parallel angesteuert, wird ein Monopolstrahler geschaffen, welcher durch die entgegengesetzt schwingenden Klangpaneele nach dem Prinzip einer atmenden Kugel bzw. Wand für eine besonders gute Beschallung des Abhörraums sorgt.Are two sound panels at a mutual distance A from each other arranged and surrounded by a frame, is between a space was formed for the two sound panels and the frame, which the sound waves emitted in this room from the Sound waves separated by the two facing away from each other Surfaces of the sound panels are given. Will the Drivers, which the two are arranged at a mutual distance A. Driving sound panels electrically controlled in parallel, a monopoly radiator is created, which by the oppositely vibrating sound panels based on the principle a breathing ball or wall for a particularly good sound system the listening room.

Soll auch die ins Innere des aus den Klangpaneelen und dem Rahmen gebildeten Raumes abgestrahlte Schallenergie zur Beschallung des Abhörraums genutzt werden, sind gemäß Anspruch 6 die Klangpaneele und/oder der Rahmen mit Schallaustrittsöffnungen auszustatten. In diesem Fall kann der zwischen den Klangpaneelen und dem Rahmen gebildete Raum als Baßreflexvolumen und die jeweilige Schallaustrittsöffnung als Baßreflexöffnung gestaltet werden. Ebenso ist es möglich, an die Schallaustrittsöffnung eine Transmissionlinie anzuschließen.Should also the inside of the sound panels and the Emitted sound energy for sound reinforcement the listening room are used according to claim 6 the sound panels and / or the frame with sound outlet openings equip. In this case, the between the Sound panels and space formed as a frame as bass reflex volume and the respective sound outlet opening as a bass reflex opening be designed. It is also possible to join the To connect a transmission line to the sound outlet.

Schon an dieser Stelle sei darauf hingewiesen, daß die erfindungsgemäße Anordnung nicht nur auf die reine Baßwiedergabe fixiert ist. Vielmehr ist auch eine kombinierte Anordnung realisierbar, bei welcher ein Klangpaneel zusammen mit dem oben schon mehrfach angesprochenen Raum hauptsächlich zur Verwendung für die Baßwiedergabe ausgelegt wird, während das andere Klangpaneel dann für die Wiedergabe beispielsweise des Mittel/Hochtonbereichs optimiert wird. Letzteres schließt gemäß Anspruch 8 ein, daß die beiden Klangpaneele nach Material und/oder Abmessungen für ihre jeweiligen Übertragungsbereiche optimiert ausgebildet sind und sich daher beispielsweise auch in ihrer Dicke, dem Kernschichtmaterial und/oder den verwendeten Deckschichten unterscheiden können. Daß das Klangpaneel, welches zur Baßwiedergabe bestimmt ist, im Gegensatz zum anderen Klangpaneel nicht der Abhörperson direkt zugewandt ist, ist ohne Bedeutung, weil das menschliche Gehör für Frequenzen kleiner als 100 Hz nur eine schlechte Ortung besitzt. At this point it should be noted that the invention Arrangement not only on pure bass reproduction is fixed. Rather, a combined arrangement can also be implemented, where a sound panel along with the one above space that has already been mentioned several times, mainly for use is designed for bass reproduction while the other Sound panel then for the reproduction of the mid / high range, for example is optimized. The latter closes according to Claim 8 one that the two sound panels according to material and / or dimensions for their respective transmission ranges are optimized and therefore, for example in their thickness, the core layer material and / or the used Can distinguish top layers. That the sound panel, which is intended for bass reproduction, in contrast on the other sound panel not directly facing the listener is meaningless because human hearing for Frequencies less than 100 Hz only has a poor location.

Sind die Treiber gemäß Anspruch 2 angeordnet, wirkt der eine Treiber, welcher das eine Klangpaneel antreibt, gleichzeitig als Gegenlager für den das andere Klangpaneel antreibenden Treiber. Eine solche Ausbildung ist deshalb insbesondere dann vorteilhaft, wenn die verbundenen Treiber, welche die verschiedenen Klangpaneele antreiben, elektrisch parallel betrieben werden und somit gegenläufig schwingen.If the drivers are arranged according to claim 2, one acts Driver that drives the sound panel at the same time as a counter bearing for the one driving the other sound panel Driver. Such training is therefore particularly important advantageous if the connected drivers which are the different Drive sound panels, operated electrically in parallel and thus swing in opposite directions.

Der Aufwand ist weiter reduziert, wenn gemäß Anspruch 3 die verbundenen Treiber als gemeinsamer Treiber ausgebildet sind. Hierunter sind Anordnungen zu verstehen, deren gemeinsame Bauteile und Magnetkreisläufe zum Antrieb beider in gegenseitigem Abstand A angeordneten Klangpaneele beitragen.The effort is further reduced if according to claim 3 connected drivers are designed as a common driver. This includes arrangements, their common Components and magnetic circuits for driving both in mutual Distance A arranged sound panels contribute.

Sind im Abstand A zwischen den beiden Klangpaneelen noch federnde Elemente angeordnet, wird durch die gegenseitige Stützung eine weitere Stabilisierung der beiden Klangpaneele erreicht. Außerdem können die Federn durch ihren Dämpfungseinfluß auch zur Abstimmung der Klangpaneele eingesetzt sein.Are still resilient in the distance A between the two sound panels Elements arranged by mutual support further stabilization of the two sound panels achieved. In addition, the springs can by their damping influence also used to tune the sound panels his.

Besonders vorteilhaft ist es, wenn die Treiber nicht an den Klangpaneelen, sondern an den Elementen (Rahmen und/oder Federn) befestigt sind. Durch diese Art der Lagerung der Treiber wird sichergestellt, daß die Biegewellenausbreitung in den Klangpaneelen durch Massenbelastung nicht oder nur gering beeinträchtigt wird bzw. von den Treibern keine Dämpfungseinflüsse hervorgerufen werden.It is particularly advantageous if the drivers are not connected to the Sound panels, but on the elements (frame and / or springs) are attached. Through this type of driver storage it is ensured that the bending wave propagation in the sound panels due to mass load not or only slightly is affected or no damping influences from the drivers are caused.

Kurze Darstellung der FigurenBrief presentation of the figures

Es zeigen:

Figur 1
eine Schallwiedergabeanordnung im Seitenschnitt;
Figur 2
einen Schnitt durch einen Treiber einer Schallwiedergabeanordnung;
Figur 3
eine weitere Darstellung einer Anordnung gemäß Figur 2;
Figur 4
eine weitere Darstellung einer Anordnung gemäß Figur 2;
Figur 5
eine weitere Darstellung einer Anordnung gemäß Figur 2; und
Figur 6
noch eine weitere Darstellung einer Anordnung gemäß Figur 2.
Show it:
Figure 1
a sound reproduction arrangement in side section;
Figure 2
a section through a driver of a sound reproduction device;
Figure 3
a further representation of an arrangement according to Figure 2;
Figure 4
a further representation of an arrangement according to Figure 2;
Figure 5
a further representation of an arrangement according to Figure 2; and
Figure 6
yet another representation of an arrangement according to FIG. 2.

Wege zum Ausführen der ErfindungWays of Carrying Out the Invention

Die Erfindung soll nun anhand der Figuren näher erläutert werden.The invention will now be explained in more detail with reference to the figures become.

Der in Figur 1 gezeigte Seitenschnitt zeigt eine Schallwiedergabeanordnung 10, welche im wesentlichen von einem vorderen Klangpaneel 11.1, einem hinteren Klangpaneel 11.2, drei Treibern 12 (12.1, 12.2, 12.3) und einem Rahmen 13 gebildet wird.The side section shown in Figure 1 shows a sound reproduction arrangement 10, which is essentially from a front Sound panel 11.1, a rear sound panel 11.2, three Drivers 12 (12.1, 12.2, 12.3) and a frame 13 are formed becomes.

Die beiden Klangpaneele 11.1, 11.2, welche in gegenseitigem Abstand A zueinander angeordnet sind, sind an ihren Rändern 14 mit dem Rahmen 13 verbunden. Auch wenn die Verbindung zwischen Rahmen 13 und den Klangpaneelen 11.1, 11.2 als starre Verbindung ausgebildet ist, kann in einem anderen - nicht dargestellten- Ausführungsbeispiel zwischen dem Rahmen 13 und den Klangpaneelen 11.1, 11.2 eine Sicke- wie sie z. B. in einer unter dem Anmeldetag dieser Anmeldung für die Anmelderin hinterlegten Anmeldung gezeigt ist - angeordnet sein. Im Raum 15, welcher von den beiden Klangpaneelen 11.1, 11.2 und dem Rahmen 13 umschlossen ist, sind zwei der drei Treiber 12 Rücken an Rücken eingesetzt. Diese beiden völlig identischen Treiber 12.1, 12.2, welche nur schematisch gezeigt sind, sind in diesem Ausführungsbeispiel als Ferritsysteme ausgebildet und über deren Schwingspulenträger 26 mit dem jeweiligen Klangpaneel 11.1, 11.2 verbunden. Werden die Schwingspulen der beiden Treiber 12.1, 12.2 mit einer Tonsignalquelle leitend verbunden (alles nicht gezeigt), werden beide Klangpaneele 11.1, 11.2 in einander entgegengesetzte Richtungen verformt. Diese Verformung der beiden Klangpaneele 11.1, 11.2 bewirkt, daß die Schallwiedergabeanordnung 10 wie eine atmende Kugel bzw. Wand wirkt.The two sound panels 11.1, 11.2, which are in mutual Distance A are arranged at their edges 14 connected to the frame 13. Even if the connection between Frame 13 and the sound panels 11.1, 11.2 as rigid Connection is formed in another - not illustrated embodiment between the frame 13 and the sound panels 11.1, 11.2 a bead - as z. B. in one under the filing date of this application for the applicant deposited application is shown - be arranged. In the room 15, which of the two sound panels 11.1, 11.2 and the Frame 13 is enclosed, two of the three drivers 12 are backs used on the back. These two are completely identical Drivers 12.1, 12.2, which are only shown schematically formed as ferrite systems in this embodiment and via the voice coil bobbin 26 with the respective sound panel 11.1, 11.2 connected. Will the voice coils be the two drivers 12.1, 12.2 with a sound signal source conductive connected (everything not shown), both sound panels 11.1, 11.2 deformed in opposite directions. This deformation of the two sound panels 11.1, 11.2 causes that the sound display assembly 10 like a breathing ball or wall works.

Nur der Vollständigkeit halber sei darauf hingewiesen, daß die in Figur 1 gezeigte Schallwiedergabeanordnung 10 als Baßwiedergabeanordnung ausgelegt ist. Ein akustischer Kurzschluß zwischen den direkt an den Abhörraum 16 angekoppelten Oberflächen der beiden Klangpaneele 11.1, 11.2 ist ausgeschlossen, weil sich unter Einfluß der Tonsignale die beiden Klangpaneele 11.1, 11.2 bezogen auf die gezeigten Mittellinie in entgegengesetzte Richtungen bewegen und die in den Raum 15 abgestrahlte Schallenergie durch die Klangpaneele 11.1, 11.2 und den Rahmen 13 von Abhörraum 16 separiert ist. Soll die ins Innere des Raumes 15 abgestrahlte Schallenergie zur Beschallung des Abhörraumes 16 mit eingesetzt werden, kann das Volumen des Raumes 15 als sogenanntes Baßreflexvolumen benutzt werden, indem das Innere des Raumes 15 mittels zumindest einer Schallaustrittsöffnung 17 mit dem Abhörraum 16 verbunden wird. Auch wenn im Ausführungsbeispiel gemäß Figur 1 die Schallaustrittsöffnung 17 im Rahmen 13 ausgebildet ist, kann in einem anderen - nicht dargestellten - Ausführungsbeispiel die Schallaustrittsöffnung auch in einem Klangpaneel eingelassen sein.For the sake of completeness, it should be noted that the sound reproduction arrangement 10 shown in FIG. 1 as a bass reproduction arrangement is designed. An acoustic short circuit between the surfaces coupled directly to the listening room 16 of the two sound panels 11.1, 11.2 is excluded, because under the influence of the sound signals the two sound panels 11.1, 11.2 related to the center line shown in move in opposite directions and into space 15 radiated sound energy through the sound panels 11.1, 11.2 and the frame 13 is separated from the listening room 16. Should the sound energy radiated into the interior of the room 15 for sound reinforcement of the listening room 16 can be used with that Volume of the room 15 used as a so-called bass reflex volume be by the interior of the room 15 by means of at least a sound outlet opening 17 connected to the listening room 16 becomes. Even if in the exemplary embodiment according to FIG Sound outlet opening 17 is formed in the frame 13 can in another - not shown - embodiment the sound outlet opening also in a sound panel be let in.

Außerdem ist im Inneren des Raumes 15 ein federndes Element 18 eingesetzt, welches die beiden in gegenseitigem Abstand A angeordneten Klangpaneele 11.1, 11.2 an den Verbindungsstellen 19 zusätzlich gegeneinander abstützt. Neben dieser Abstützwirkung kann das federnde Element 18 auch eine gewisse Filterwirkung auf die von den Klangpaneelen 11.1, 11.2 abzustrahlenden Schallwellen ausüben. In addition, a resilient element is in the interior of the room 15 18 used, which the two at a mutual distance A arranged sound panels 11.1, 11.2 at the connection points 19 additionally supported against each other. In addition to this support effect can the resilient element 18 also a certain Filter effect on those to be emitted by the sound panels 11.1, 11.2 Exert sound waves.

Mit 12.3 ist ein Treiber bezeichnet, welcher im Klangpaneel 11.2 eingelassen ist und welcher als Piezo-Treiber ausgebildet ist. Dieser Treiber 12.3 kann beispielsweise zur Abstrahlung hochfrequenter Tonsignale von dem Klangpaneel 11.2 eingesetzt sein. Da im Gegensatz zu tieffrequenten Schallwellen höherfrequente Schallwellen eine Richtcharakteristik aufweisen, sollte das den Treiber 12.3 aufweisende Klangpaneel 11.2 der Schallwiedergabeanordnung 10 der Abhörperson im Abhörraum 16 direkt zugewandt sein.With 12.3 a driver is designated, which in the sound panel 11.2 is embedded and which is designed as a piezo driver is. This driver 12.3 can be used for radiation, for example high-frequency sound signals used by the sound panel 11.2 his. Because in contrast to low-frequency sound waves higher-frequency sound waves have a directional characteristic, should the sound panel 11.2 with the driver 12.3 the sound reproducing arrangement 10 of the interceptor in the interception room 16 face directly.

Im Ausführungsbeispiel gemäß Figur 2 ist eine Schallwiedergabeanordnung 10 detaillierter dargestellt. So ist Figur 2 entnehmbar, daß die beiden Klangpaneele 11.1, 11.2 jeweils aus einer Kernschicht 20 mit Wabenstruktur und zwei Deckschichten 21 gebildet sind. Außerdem sind die Treiber 12.1, 12.2, welche gemäß Figur 1 die beiden Klangpaneele 11.1, 11.2 antreiben, im Ausführungsbeispiel gemäß Figur 2 als gemeinsamer Treiber 12.4 ausgebildet. Im einzelnen ist diese so realisiert, daß ein kreisringförmiger Dauermagnet 22 vorhanden ist, dessen jeweilige Polflächen N, S mit einer Polscheibe 23 in Kreisringform versehen sind. Außerdem umrandet die aus dem Dauermagnet 22 und den Polscheiben 23 gebildete Einheit mit seitlichem Abstand einen Polkern 24. Da der gemeinsame Treiber 12.4 mittig im Abstand A zwischen den beiden Klangpaneelen 11.1, 11.2 angeordnet ist, sind beim vorliegenden Ausführungsbeispiel zwei kreisringförmige Halteglieder 25 aus nicht ferromagnetischem Material vorhanden. Dabei verbindet das eine Halteglied 25.1 den Dauermagneten 22 mit dem Polkern 24, während das andere Halteglied 25.2 vom Dauermagneten 22 zu den mit seitlichem Abstand zum gemeinsamen Treiber 12.4 angeordneten federnden Elementen 18 geführt und mit diesen verbunden ist. Dieses Halteglied 25.2 kann auch in einem anderen - nicht dargestellten - Ausführungsbeispiel mit anderen Treibern 12 und/oder auch mit dem Rand 13 (Figur 1) verbunden sein. Nur der Vollständigkeit halber sei darauf hingewiesen, daß die Halteglieder 25.1, 25.2 aus einem federnden Material hergestellt sein können und durch ihre parallele Lage zu den Klangpaneelen 11.1, 11.2 wie eine Blattfeder wirken.In the exemplary embodiment according to FIG. 2 there is a sound reproduction arrangement 10 shown in more detail. Figure 2 can be seen that the two sound panels 11.1, 11.2 each a core layer 20 with a honeycomb structure and two cover layers 21 are formed. In addition, the drivers 12.1, 12.2, which drive the two sound panels 11.1, 11.2 according to FIG. 1, in the exemplary embodiment according to FIG. 2 as a common one Driver trained 12.4. In detail, this is implemented that an annular permanent magnet 22 is present whose respective pole faces N, S are connected to a pole disk 23 are provided in a circular ring shape. In addition, the frame from the Permanent magnet 22 and the pole disks 23 unit formed with lateral distance a pole core 24. Because the common driver 12.4 in the middle at a distance A between the two sound panels 11.1, 11.2 are arranged in the present embodiment two annular holding members 25 not ferromagnetic material available. One thing connects Holding member 25.1 the permanent magnet 22 with the pole core 24, while the other holding member 25.2 of the permanent magnet 22nd to those with a lateral distance to the common driver 12.4 arranged resilient elements 18 out and with them connected is. This holding member 25.2 can also be in another - Not shown - embodiment with others Drivers 12 and / or connected to the edge 13 (Figure 1) his. Just for the sake of completeness that the holding members 25.1, 25.2 made of a resilient material can be made and due to their parallel position to the Sound panels 11.1, 11.2 act like a leaf spring.

Ferner sind zwei topfförmige Schwingspulenträger 26 vorhanden und jeweils mit einem der beiden Klangpaneele 11.1, 11.2 verbunden. Die Ränder der beiden Schwingspulenträger 26 sind jeweils mit einer Schwingspule 27 versehen und tauchen in den Spalt zwischen dem Polkern 24 und der Einheit aus Dauermagnet 22 und jeweiliger Polscheibe 23 ein.There are also two pot-shaped voice coil bobbins 26 and each connected to one of the two sound panels 11.1, 11.2. The edges of the two voice coil bobbins 26 are each provided with a voice coil 27 and immerse in the Gap between the pole core 24 and the permanent magnet unit 22 and respective pole disk 23.

Soll die Schallwiedergabeanordnung 10 gemäß Figur 2 ebenso wie die Anordnung gemäß Figur 1 als Baßanordnung verwendet werden und sollen sich entsprechend der obigen Ausführungen die beiden Klangpaneele 11.1, 11.2 unter Einfluß der Tonsignale jeweils in entgegengesetzte Richtungen bewegen, ist es notwendig, daß die Stromlaufrichtung in den beiden Schwingspulen 27 unterschiedlich ist.Should the sound reproduction arrangement 10 according to FIG. 2 likewise used as the arrangement according to Figure 1 as a bass arrangement will and should be according to the above the two sound panels 11.1, 11.2 under the influence of the sound signals move in opposite directions, it is necessary that the direction of current flow in the two voice coils 27 is different.

Nur der Vollständigkeit halber sei darauf hingewiesen, daß zur Bereitstellung einer ausreichend großen Induktion im Ausführungsbeispiel gemäß Figur 2 ein Dauermagnet 22 aus einer Seltenerdlegierung in der Form einer Neodymlegierung verwendet wurde. Zur weiteren Steigerung der Induktion können gemäß fachmännischer Weiterbildung der Anordnung gemäß Figur 2 weitere Dauermagnete mit dem gemeinsamen Treiber 12.4 verbunden sein, indem beispielsweise der Teil 24.1 des Polkerns 24 aus einem dauermagnetischen Material ausgebildet wird.For the sake of completeness, it should be noted that to provide a sufficiently large induction in the embodiment 2, a permanent magnet 22 from a Rare earth alloy used in the form of a neodymium alloy has been. To further increase the induction, according to Professional development of the arrangement according to FIG. 2 further permanent magnets connected to the common driver 12.4 be, for example, part 24.1 of the pole core 24 is formed from a permanent magnetic material.

Weist wie im gemäß Figur 2 dargestellten Ausführungsbeispiel die Schallwiedergabeanordnung 10 keine Schallaustrittsöffnung 17 auf, die den Raum 15 mit dem Abhörraum 16 verbindet, sollte der Raum 15 zumindest teilweise mit einem schallabsorbierenden Material gefüllt sein (nicht dargestellt).
Schließlich sei noch erwähnt, daß der Polkern 24 im in Figur 2 dargestellten Ausführungsbeispiel nicht notwendig über das Halteglied 25.1 mit dem Dauermagnet 22 verbunden sein muß, sondern in einem anderen Ausführungsbeispiel auch mit den Klangpaneelen 11.1, 11.2 verbunden sein kann. Zur Vermeidung von Dämpfungen sollte dann die Verbindung von Polkern 24 und den Klangpaneelen 11.1, 11.2 elastisch ausgebildet sein.
If, as in the exemplary embodiment shown in FIG. 2, the sound reproduction arrangement 10 has no sound outlet opening 17 which connects the room 15 to the listening room 16, the room 15 should be at least partially filled with a sound-absorbing material (not shown).
Finally, it should also be mentioned that the pole core 24 in the exemplary embodiment shown in FIG. 2 does not necessarily have to be connected to the permanent magnet 22 via the holding member 25.1, but can also be connected to the sound panels 11.1, 11.2 in another exemplary embodiment. To avoid damping, the connection between the pole core 24 and the sound panels 11.1, 11.2 should be elastic.

In Figur 3 ist ein gemeinsamer Treiber 12.4 gezeigt, welcher gegenüber dem Treiber 12.4 gemäß Figur 2 modifiziert ist. Auch dieser Treiber 12.4 (Figur 3) umfaßt einen kreisringförmig ausgebildeten Dauermagneten 22 und zwei mit Schwingspulen 27 versehene Schwingspulenträger 26. Im Gegensatz zur Ausbildung gemäß Figur 2 kann bei der Ausbildung gemäß Figur 3 aber vollständig auf sogenannte Rückschlußteile in der Form von Polscheiben und Polkern verzichtet werden. Statt dessen erfolgt bei der Anordnung gemäß Figur 3 der Rückschluß ausschließlich über die Luftstrecke zwischen den beiden Polen N, S des radial magnetisierten Dauermagneten 22. Im einzelnen ist dies so gelöst, daß der Dauermagnet 22 über ein Halteglied 25.3 mit dem Klangpaneel 11.2 verbunden ist. Die Schwingspule 27', welche über den Schwingspulenträger 26 mit dem Klangpaneel 11.1 verbunden ist, ist im Ruhestand der Schallwiedergabeanordnung 10 dem Nordpol N des radial magnetisierten Dauermagneten 22 mit engem seitlichen Abstand nebengeordnet, während die andere Schwingspule 27'' dem Südpol S des Dauermagneten 22 ebenfalls mit seitlichen Abstand nebengeordnet ist. Mit Rücksicht auf die verschiedenen Durchmesser der beiden Schwingspulen 27', 27'' und der sich dadurch ergebenden Verhältnisse kann die in Figur 3 gezeigte Schallwiedergabeanordnung 10 zur gezielten Betonung unterschiedlicher Frequenzbereiche von den beiden Klangpaneelen 11.1, 11.2 verwendet werden. Wird die Schallwiedergabeanordnung 10 gemäß Figur 3 mit in beiden Klangpaneelen 11.1, 11.2 unterschiedlich betonten Frequenzbereichen eingesetzt, sollten die beiden Klangpaneele 11.1, 11.2 für die jeweiligen Frequenzbereiche bezüglich der Deckschichten 21 bzw. Kernschichten 20 optimiert ausgebildet sein. A common driver 12.4 is shown in FIG modified compared to driver 12.4 according to FIG. 2. This driver 12.4 (FIG. 3) also has an annular shape trained permanent magnets 22 and two with voice coils 27 provided voice coil former 26. Contrary to the training According to FIG. 2, however, in the embodiment according to FIG completely on so-called inference parts in the form of Pole discs and pole core are dispensed with. Instead it is done in the arrangement according to FIG. 3, the conclusion is exclusively over the air distance between the two poles N, S of the radially magnetized permanent magnet 22. In detail this is solved so that the permanent magnet 22 via a holding member 25.3 is connected to the sound panel 11.2. The Voice coil 27 ', which with the voice coil support 26 is connected to the sound panel 11.1 is the retired Sound reproduction arrangement 10 the north pole N of the radially magnetized Permanent magnets 22 with close lateral spacing, while the other voice coil 27 '' the south pole S of the permanent magnet 22 also arranged at a lateral distance is. With regard to the different diameters of the two voice coils 27 ', 27' 'and the resulting one The sound reproduction arrangement shown in FIG 10 to specifically emphasize different Frequency ranges used by the two sound panels 11.1, 11.2 become. If the sound reproduction arrangement 10 according to Figure 3 with different in both sound panels 11.1, 11.2 emphasized frequency ranges, the two should Sound panels 11.1, 11.2 for the respective frequency ranges optimized with respect to the cover layers 21 or core layers 20 be trained.

Im Gegensatz zum Treiber 12.4 gemäß Figur 3 weist der Treiber 12.4 gemäß Figur 4 Polscheiben 23 auf, obwohl auch dort der Rückschluß zwischen den beiden Polen N, S des Dauermagneten 22 über die Luftstrecke erfolgt. Daher haben die mit den Polflächen N, S des axial magnetisierten Dauermagneten 22 verbundenen Polscheiben keine direkte Rückschlußwirkung, sondern tragen lediglich zu einer Konzentrationswirkung der vom Dauermagneten 22 bereitgestellten Feldlinien auf die Schwingspulen 27' und 27'' bei. Im Gegensatz zu allen bisher erläuterten Ausführungsbeispielen wird bei dem Ausführungsbeispiel gemäß Figur 4 auf die Bereitstellung eines separaten Schwingspulenträgers verzichtet. Statt dessen sind die Schwingspulen 27', 27" mit den Rändern 28 von Ausfräsungen 29 verbunden, die in jedes der beiden Klangpaneele 11.1, 11.2 eingelassen sind. Der aus dem Dauermagneten 22 und den beiden Polscheiben 23 gebildete Treiber 12.4 ist im Abtand A unter Nutzung der Ausfräsungen 29 eingesetzt. Die direkte Verbindung zwischen den Polscheiben 23 und den Klangpaneelen 11.1, 11.2 erfolgt unter Zwischenordnung eines Halteglieds 25.4. Für diese Halteglieder 25.4, welche in einem anderen - nicht dargestellten - Ausführungsbeispiel auch von dem jeweiligen Klangpaneel 11.1 oder 11.2 selbst durch eine entsprechende Ausfräsung 29 bereitgestellt werden können, ist wesentlich, daß sie einen möglichst großen seitlichen Abstand A' zwischen den Schwingspulen 27', 27'' und den jeweiligen Verbindungsstellen der Klangpaneele 11.1, 11.2 mit den Treibern 12 haben, um eine besonders gute Krafteinprägung in die Klangpaneele 11.1, 11.2 zu erreichen.In contrast to driver 12.4 according to FIG. 3, the driver points 12.4 according to FIG. 4 pole disks 23, although there too Conclusion between the two poles N, S of the permanent magnet 22 takes place over the air. So they have the pole faces N, S of the axially magnetized permanent magnet 22 connected Pole discs not a direct inference effect, but only contribute to a concentration effect of the permanent magnet 22 field lines provided on the voice coils 27 'and 27' 'at. In contrast to all previously explained Embodiments are in the embodiment 4 to the provision of a separate voice coil former waived. Instead are the voice coils 27 ', 27 "connected to the edges 28 of cutouts 29, embedded in each of the two sound panels 11.1, 11.2 are. The one from the permanent magnet 22 and the two pole disks 23 formed driver 12.4 is in the gap A using the Cutouts 29 used. The direct connection between the pole disks 23 and the sound panels 11.1, 11.2 with the interposition of a holding member 25.4. For these holding links 25.4, which in another - not shown - Embodiment also of the respective sound panel 11.1 or 11.2 itself by means of a corresponding milling 29 It is essential that they be provided greatest possible lateral distance A 'between the voice coils 27 ', 27' 'and the respective connection points of the Sound panels 11.1, 11.2 with the drivers 12 have one particularly good force impression in the sound panels 11.1, 11.2 to reach.

Aus diesem Grund kann in Figur 3 auch zwischen dem Schwingspulenträger 26, welcher mit dem Klangpaneel 11.2 verbunden ist, und dem Klangpaneel 11.2 ein zusätzliches Halteglied (nicht dargestellt), welches gegenüber dem benannten Schwingspulenträger 26 einen verminderten Durchmesser aufweist, vorhanden sein. For this reason, in Figure 3 can also between the voice coil bobbin 26, which is connected to the sound panel 11.2 is, and the sound panel 11.2 an additional support member (not shown), which compared to the named voice coil former 26 has a reduced diameter his.

Zur Verringerung des magnetischen Widerstandes und zur Erhöhung der Antriebskraft wird in Figur 6 ein gegenüber Figur 4 modifizierter Treiber 12.4 gezeigt. Dieser Treiber 12.4 wird im wesentlichen von drei axial magnetisierten Dauermagnetscheiben 22.1 bis 22.3, zwei Polscheiben und einem Rückschlußrohr 30 gebildet. Die beiden Polflächen N, S des Dauermagneten 22.2 sind mit den beiden Polscheiben 23 verbunden. Außerdem ist an jeder Seite einer jeden Polscheibe 23, die nicht mit dem Dauermagneten 22.2 verbunden ist, ein weiterer Dauermagnet 22.1, 22.3 so angesetzt und verbunden, daß an jeder Seite der beiden Polscheiben 23, die mit den Dauermagneten 22.2, 22.1 bzw. 22.3, 22.1 verbunden sind, gleiche Pole N bzw. S wirken. Auch Figur 6 ist entnehmbar, daß die Dauermagnete 22.2 und 22.3, welche direkt mit den Böden 31 der Ausfräsungen in den Klangpaneelen 11.1, 11.2 verbunden sind, gegenüber den Polscheiben 23 einen verminderten Durchmesser haben. Soll die Einprägung von Biegewellen in die Klangpaneele 11.1, 11.2 weiter verbessert werden, kann in einen anderen - nicht gezeigten - Ausführungsbeispiel zwischen jeweiligem Boden 31 und Dauermagnete 22.1, 22.2 auch noch wie in Figur 4 gezeigt ein Halteglied (25.4) mit gegenüber den Dauermagneten 22.1 und 22.3 vermindertem Durchmesser angeordnet werden.To reduce and increase magnetic resistance the driving force in FIG. 6 is one compared to FIG. 4 modified driver 12.4 shown. This driver 12.4 will essentially of three axially magnetized permanent magnetic disks 22.1 to 22.3, two pole disks and a return tube 30 formed. The two pole faces N, S of the permanent magnet 22.2 are connected to the two pole disks 23. In addition, on each side of each pole disk 23, the is not connected to the permanent magnet 22.2, another Permanent magnet 22.1, 22.3 attached and connected so that each side of the two pole disks 23 with the permanent magnets 22.2, 22.1 and 22.3, 22.1 are connected, same poles N or S act. FIG. 6 also shows that the permanent magnets 22.2 and 22.3, which directly with the bottoms 31 of Cutouts in the sound panels 11.1, 11.2 are connected, compared to the pole disks 23 a reduced diameter to have. Is the imprint of bending waves in the sound panels 11.1, 11.2 can be further improved in one other - not shown - embodiment between respective floor 31 and permanent magnets 22.1, 22.2 also as shown in Figure 4, a holding member (25.4) with respect to Permanent magnets 22.1 and 22.3 arranged reduced diameter become.

Um den magnetischen Widerstand des Rückschlußweges zu reduzieren, ist die Anordnung aus den Polscheiben 23 und den Dauermagneten 22.1 bis 22.3 in ein Rückschlußrohr 30 eingesetzt, welches die Anordnung mit seitlichem Abstand umgibt. In diesen Ringspalt tauchen auch die beiden mit den Schwingspulen 27', 27'' versehenen und auf die beiden Klangpaneele 11.1, 11.2 wirkenden Schwingspulenträger 26 ein. Das Rückschlußrohr 30 ist mit den Rändern 28 der Ausfräsung 29 in den Klangpaneelen 11.1, 11.2 verbunden. Zusätzlich ist zwischen dem Boden 31 und den Stirnflächen 32 des Rückschlußrohres 30 ein durch die Punktierung angedeutetes Dämpfungselement 33 eingefügt, welches die sonst vom Rückschlußrohr 30 ausgehende Dämpfung reduziert. Nur der Vollständigkeit halber sei darauf hingewiesen, daß die Verwendung des Rückschlußrohres 30 nicht auf Treiberausbildungen gemäß Figur 6 beschränkt ist, sondern bei entsprechender Modifizierung auch bei einer Anordnung gemäß Figur 4 eingesetzt werden kann.In order to reduce the magnetic resistance of the return path, is the arrangement of the pole disks 23 and the permanent magnets 22.1 to 22.3 inserted in a return tube 30, which surrounds the arrangement with lateral spacing. In these The two with the voice coils also dive in an annular gap 27 ', 27' 'and on the two sound panels 11.1, 11.2 acting voice coil former 26. The return tube 30 is with the edges 28 of the cutout 29 in the sound panels 11.1, 11.2 connected. In addition, there is 31 and the end faces 32 of the return tube 30 through the Dotted indicated damping element 33 inserted, which the damping otherwise emanating from the return tube 30 is reduced. Just for the sake of completeness that the use of the return tube 30 is not on Driver training is limited according to Figure 6, but at corresponding modification even with an arrangement according to Figure 4 can be used.

Soll auf eine - in Figur 6 gezeigte - direkte Verbindung zwischen dem gemeinsamen Treiber 12.4 und dem Rückschlußrohr 30 mit den Klangpaneelen 11.1, 11.2 verzichtet werden, kann auch alternativ eine Befestigung wie sie im Zusammenhang mit Figur 2 erläutert wurde über federnde Elemente 18 und entsprechende Halteglieder 25 realisiert werden.Should on a - shown in Figure 6 - direct connection between the common driver 12.4 and the return tube 30 can be dispensed with with the sound panels 11.1, 11.2 alternatively an attachment as in connection with figure 2 was explained via resilient elements 18 and corresponding ones Holding members 25 can be realized.

Figur 5 zeigt zwei in gegenseitigem Abstand A angeordnete Klangpaneele 11.1, 11.2, welche jeweils einen Treiber 12.1, 12.2 und einen Schwingspulenträger 26 mit darauf angeordneter Schwingspule 27', 27'' aufweisen. Die gegenseitige Anordnung von Treiber 12.1, 12.2 und Schwingspulenträger 26 bzw. Schwingspule 27', 27'' ist so gewählt, daß die mit dem Klangpaneel 11.1 in körperlicher Verbindung stehende Schwingspule 27" in den mit dem Klangpaneel 11.2 verbundenen und topfförmig ausgebildeten Treiber 12.2 und die Schwingspule 27' in den Treiber 12.1 am Klangpaneel 11.1 eingreifen. Die in Figur 5 nicht vorhandene gegenseitige Abstützung der beiden Treiber 12.1, 12.2 wird dadurch kompensiert, daß die Treiber 12.1, 12.2 oder besser deren Dauermagnete 22 als seismische Massen ein ausreichendes Gegenlager zur Verfügung stellen.Figure 5 shows two spaced A apart Sound panels 11.1, 11.2, each of which has a driver 12.1, 12.2 and a voice coil bobbin 26 with arranged thereon Have voice coil 27 ', 27' '. The mutual arrangement driver 12.1, 12.2 and voice coil former 26 or Voice coil 27 ', 27' 'is selected so that with the sound panel 11.1 voice coil with physical connection 27 "in the pan-shaped and connected to the sound panel 11.2 trained driver 12.2 and the voice coil 27 'in engage the driver 12.1 on the sound panel 11.1. The one in figure 5 nonexistent mutual support of the two drivers 12.1, 12.2 is compensated for by the fact that the drivers 12.1, 12.2 or better their permanent magnets 22 as seismic masses provide a sufficient counter bearing.

Claims (8)

  1. A sound reproduction configuration
    having at least one sound panel (11.1, 11.2), which is formed by a core layer (20) having at least one cover layer (21), and
    having at least one driver (12), which is fitted onto the sound panel (11) or is integrated therein,
    characterised in that two of the sound panels (11.1, 11.2) are disposed with a mutual spacing (A) from each other,
    in that elements (13) are provided which connect the two sound panels (11.1, 11.2),
    and in that at least two drivers (12) are provided and the drivers (12) are disposed at the sides of the sound panels (11.1, 11.2) which face each other.
  2. A sound reproduction configuration according to Claim 1,
    characterised in that at least one driver (12.1) of a sound panel (11.1) is connected to a driver (12.2) of the other sound panel (11.2).
  3. A sound reproduction configuration according to Claim 2,
    characterised in that the connected drivers (12.1, 12.2) of both sound panels (11.1, 11.2) are constructed as a common driver (12.4).
  4. A sound reproduction configuration according to one of Claims 1 to 3,
    characterised in that the element (13) which connects the two sound panels (11.1, 11.2) is a, frame (13) which is connected to the edges (14) of the sound panels (11.1, 11.2).
  5. A sound reproduction configuration according to one of Claims 1 to 4,
    characterised in that resilient elements (18) are provided
    and in that these resilient elements (18) are disposed between two mutually facing sides of the sound panels (11.1, 11.2) which are disposed with a mutual spacing (A).
  6. A sound reproduction configuration according to one of Claims 1 to 5,
    characterised in that at least one of the sound panels (11.1, 11.2) and/or the element (13) connecting the two sound panels (11.1, 11.2) comprises at least one sound outlet (17).
  7. A sound reproduction configuration according to one of Claims 1 to 6,
    characterised in that the drivers (12) are connected to the element (13) which connects the two sound panels and to the resilient elements (18).
  8. A sound reproduction configuration according to one of Claims 1 to 7,
    characterised in that the cover layers (21) and or core layers (20) of the two sound panels (11.1, 11.2) differ from each other with respect to material and/or dimensions.
EP99952146A 1998-05-15 1999-05-14 Sound reproduction device working according to the bending wave principle Expired - Lifetime EP1078553B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19821862A DE19821862A1 (en) 1998-05-15 1998-05-15 Flat panel loudspeaker
DE19821862 1998-05-15
PCT/EP1999/003314 WO1999060819A1 (en) 1998-05-15 1999-05-14 Sound reproduction device working according to the bending wave principle

Publications (2)

Publication Number Publication Date
EP1078553A1 EP1078553A1 (en) 2001-02-28
EP1078553B1 true EP1078553B1 (en) 2003-07-30

Family

ID=7867905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99952146A Expired - Lifetime EP1078553B1 (en) 1998-05-15 1999-05-14 Sound reproduction device working according to the bending wave principle

Country Status (4)

Country Link
US (1) US6622817B1 (en)
EP (1) EP1078553B1 (en)
DE (2) DE19821862A1 (en)
WO (1) WO1999060819A1 (en)

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Also Published As

Publication number Publication date
US6622817B1 (en) 2003-09-23
DE59906440D1 (en) 2003-09-04
EP1078553A1 (en) 2001-02-28
WO1999060819A1 (en) 1999-11-25
DE19821862A1 (en) 1999-11-18

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