EP1078553B1 - Schallwiedergabeanordnung nach dem biegewellenprinzip - Google Patents
Schallwiedergabeanordnung nach dem biegewellenprinzip Download PDFInfo
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/045—Plane 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic 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.
Description
- 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.
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.
Claims (8)
- Schallwiedergabeanordnung
mit wenigstens einem Klangpaneel (11.1, 11.2), welches von einer Kernschicht (20) mit wenigstens einer Deckschicht (21) gebildet ist, und
mit wenigstens einem Treiber (12), welcher an das Klangpaneel (11) angesetzt oder in diesem integriert ist,
dadurch gekennzeichnet, daß zwei der Klangpaneele (11.1, 11.2) in gegenseitigem Abstand (A) zueinander angeordnet sind,
daß Elemente (13) vorhanden sind, welche die beiden Klangpaneele (11.1, 11.2) verbinden, und
daß wenigstens zwei Treiber (12) vorhanden sind und die Treiber (12) an den Seiten der Klangpaneele (11.1, 11.2) angeordnet sind, die einander zugewandt sind. - Schallwiedergabeanordnung nach Anspruch 1,
dadurch gekennzeichnet, daß wenigstens ein Treiber (12.1) eines Klangpaneels (11.1) mit einem Treiber (12.2) des anderen Klangpaneels (11.2) verbunden ist. - Schallwiedergabeanordnung nach Anspruch 2,
dadurch gekennzeichnet, daß die verbundenen Treiber (12.1, 12.2) beider Klangpaneele (11.1, 11.2) als gemeinsamer Treiber (12.4) ausgebildet sind. - Schallwiedergabeanordnung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das Element (13), welches die beiden Klangpaneele (11.1, 11.2) verbindet, ein Rahmen (13) ist; der mit den Rändern (14) der Klangpaneele (11.1, 11.2) verbunden ist. - Schallwiedergabeanordnung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß federnde Elemente (18) vorhanden sind und
daß diese federnden Elemente (18) zwischen zwei einander zugewandten Seiten der in gegenseitigem Abstand (A) angeordneten Klangpaneele (11.1, 11.2) angeordnet sind. - Schallwiedergabeanordnung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet , daß wenigstens eines der Klangpaneele (11.1, 11.2) und/oder das die beiden klangpaneele (11.1, 11.2) verbindende Element (13) wenigstens eine Schallaustrittsöffnung (17) aufweist. - Schallwiedergabeanordnung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet , daß die Treiber (12) mit dem die beiden klangpaneele verbindenden Element (13) und den federnden Elementen (18) verbunden sind. - Schallwiedergabeanordnung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Deckschichten (21) und/oder Kernschichten (20) der beiden Klangpaneele (11.1, 11.2) nach Material und/oder Abmessungen voneinander verschieden sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19821862 | 1998-05-15 | ||
DE19821862A DE19821862A1 (de) | 1998-05-15 | 1998-05-15 | Schallwiedergabeanordnung |
PCT/EP1999/003314 WO1999060819A1 (de) | 1998-05-15 | 1999-05-14 | Schallwiedergabeanordnung nach dem biegewellenprinzip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1078553A1 EP1078553A1 (de) | 2001-02-28 |
EP1078553B1 true EP1078553B1 (de) | 2003-07-30 |
Family
ID=7867905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99952146A Expired - Lifetime EP1078553B1 (de) | 1998-05-15 | 1999-05-14 | Schallwiedergabeanordnung nach dem biegewellenprinzip |
Country Status (4)
Country | Link |
---|---|
US (1) | US6622817B1 (de) |
EP (1) | EP1078553B1 (de) |
DE (2) | DE19821862A1 (de) |
WO (1) | WO1999060819A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19825866A1 (de) | 1998-06-10 | 1999-12-16 | Nokia Deutschland Gmbh | Plattenlautsprecher |
DE10001410C2 (de) * | 2000-01-14 | 2001-12-06 | Harman Audio Electronic Sys | Flachlautsprecheranordnung |
US7372968B2 (en) | 2000-11-08 | 2008-05-13 | New Transducers Limited | Loudspeaker driver |
CA2340845A1 (en) * | 2001-02-23 | 2002-08-23 | Cotron Corporation | Built-in micro-speaker for wireless communication device |
US6813362B2 (en) | 2001-04-05 | 2004-11-02 | New Transducers Limited | Loudspeaker and method of making same |
WO2002082856A2 (en) * | 2001-04-05 | 2002-10-17 | New Transducers Limited | Loudspeaker and method of making same |
EP1410680B1 (de) * | 2001-07-13 | 2010-12-15 | Harman Becker Automotive Systems GmbH | Plattenlautsprecher |
GB0221503D0 (en) * | 2002-09-17 | 2002-10-23 | 1 Ltd | Loudspeaker |
JP4412495B2 (ja) * | 2002-09-26 | 2010-02-10 | セイコーエプソン株式会社 | 駆動機構 |
CN1853444A (zh) * | 2003-09-16 | 2006-10-25 | 皇家飞利浦电子股份有限公司 | 高效音频换能器 |
FR2865608B1 (fr) * | 2004-01-23 | 2007-02-09 | Robert Rigondeau | Transducteur electoacoustique et enceinte le comportant |
EP1757161B1 (de) * | 2004-05-14 | 2016-11-30 | Sonion Nederland B.V. | Elektroakustischer wandler mit doppelter membran |
JP2008219202A (ja) * | 2007-02-28 | 2008-09-18 | National Institute Of Information & Communication Technology | 音響振動再生装置 |
DE102012025313B3 (de) * | 2012-12-22 | 2014-02-20 | Audi Ag | Schallwandler zur Wandlung elektrischer Signale in Luftschall |
DE102014218427B4 (de) * | 2014-09-15 | 2016-06-02 | Kendrion Kuhnke Automotive GmbH | Lautsprecher, insbesondere elektrodynamischer Lautsprecher |
US9820035B2 (en) * | 2016-03-25 | 2017-11-14 | Bose Corporation | Audio systems and apparatus for vibration isolation |
EP4161096A1 (de) * | 2021-09-30 | 2023-04-05 | Harman Becker Automotive Systems GmbH | Lautsprecher |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4242541A (en) * | 1977-12-22 | 1980-12-30 | Olympus Optical Co., Ltd. | Composite type acoustic transducer |
JPS57152299A (en) * | 1981-03-16 | 1982-09-20 | Nippon Soken Inc | Ultrasonic cable transmitter and receiver |
FR2503516B1 (fr) * | 1981-04-01 | 1986-02-07 | Klein Siegfried | Haut-parleur electrodynamique omnidirectionnel pour les frequences basses et medium du spectre sonore |
DE3405635A1 (de) * | 1984-02-17 | 1985-08-22 | Rainer J. 5000 Köln Haas | Elektrodynamischer lautsprecher mit rundum-schallabstrahlung |
US4969197A (en) * | 1988-06-10 | 1990-11-06 | Murata Manufacturing | Piezoelectric speaker |
JP2673002B2 (ja) * | 1989-03-31 | 1997-11-05 | 株式会社ケンウッド | スピーカシステム |
US6192136B1 (en) * | 1995-09-02 | 2001-02-20 | New Transducers Limited | Inertial vibration transducers |
TR199800365T1 (xx) * | 1995-09-02 | 1998-05-21 | New Transducers Limited | Atalet titre�imi d�n��t�r�c�leri. |
US6327369B1 (en) * | 1995-09-02 | 2001-12-04 | New Transducers Limited | Loudspeakers comprising panel-form acoustic radiating elements |
TR199800366T1 (xx) | 1995-09-02 | 1998-05-21 | New Transducers Limited | Atalet titre�imi d�n��t�r�c�leri. |
DE19757099A1 (de) * | 1997-12-20 | 1999-06-24 | Nokia Deutschland Gmbh | Kontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip |
DE19757098C2 (de) | 1997-12-20 | 2003-01-09 | Harman Audio Electronic Sys | Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip |
DE19757097B4 (de) | 1997-12-20 | 2004-04-15 | Harman Audio Electronic Systems Gmbh | Schallwiedergabeanordnung |
DE19821860A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Treiber für flaches Klangpaneel |
DE19821624A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Projektionswand |
DE19821861A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Vorrichtung zur dynamischen Anregung von Plattenlautsprechern |
DE19840375C2 (de) * | 1998-09-04 | 2003-08-28 | Harman Audio Electronic Sys | Schallwand |
DE10001410C2 (de) | 2000-01-14 | 2001-12-06 | Harman Audio Electronic Sys | Flachlautsprecheranordnung |
DE10025460B4 (de) | 2000-05-23 | 2004-03-18 | Harman Audio Electronic Systems Gmbh | Hochtonlautsprecher |
-
1998
- 1998-05-15 DE DE19821862A patent/DE19821862A1/de not_active Withdrawn
-
1999
- 1999-05-14 WO PCT/EP1999/003314 patent/WO1999060819A1/de active IP Right Grant
- 1999-05-14 EP EP99952146A patent/EP1078553B1/de not_active Expired - Lifetime
- 1999-05-14 DE DE59906440T patent/DE59906440D1/de not_active Expired - Lifetime
- 1999-05-14 US US09/700,301 patent/US6622817B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59906440D1 (de) | 2003-09-04 |
US6622817B1 (en) | 2003-09-23 |
WO1999060819A1 (de) | 1999-11-25 |
EP1078553A1 (de) | 2001-02-28 |
DE19821862A1 (de) | 1999-11-18 |
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