EP0924957B1 - Anschlusskontaktierung - Google Patents
Anschlusskontaktierung Download PDFInfo
- Publication number
- EP0924957B1 EP0924957B1 EP98123816A EP98123816A EP0924957B1 EP 0924957 B1 EP0924957 B1 EP 0924957B1 EP 98123816 A EP98123816 A EP 98123816A EP 98123816 A EP98123816 A EP 98123816A EP 0924957 B1 EP0924957 B1 EP 0924957B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core layer
- conductive
- cover layers
- panel
- contact connection
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
-
- 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
- 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
Definitions
- the invention relates to the terminal contacting of sound reproduction devices, which work according to the bending wave principle.
- the panel is constructed according to the sandwich principle, placing two each other opposite surfaces of a very light core layer each with a thin cover layer are connected, for example by gluing. So that Panel has good sound reproduction properties, the material for the Cover layer have a particularly high Dehnwellen für für europea.
- suitable Covering materials are, for example, thin metal foils or else fiber reinforced plastic films.
- the core layer are special Requirements, because this layer must be in the direction of the two Surfaces covered with the cover foils have a very high and in Direction parallel to the coated with the cover films surfaces one have very low modulus of elasticity.
- This anisotropic behavior of Core layer is achieved in that the core layer, for example, a Honeycomb structure obtained in which the walls forming the honeycomb run perpendicular to the two outer layers.
- suitable materials for The honeycomb structure of the core layer has become light metals and fiber reinforced Plastics proved. It is also possible for the core layer rigid foams to use, provided that this between the two outer layers extending Have breakthroughs.
- the invention is therefore based on the object, a terminal contact for Specify sound reproduction devices according to the bending wave principle, which is very easy to implement, on the bending wave propagation a strong Has reduced damping effect and voltage losses due to high Transition resistance avoids.
- the basic idea of the present invention is to form the panel Components for connecting the voice coil and audio signal source to use, because it was found that the outer layers and / or the core layer is extremely good as power supplies for the Insert voice coil when the core layer or at least one of Cover layers has conductive areas.
- the two cover layers covered the core layer be used as conductive areas, if these from an electrical Current conducting material are made and through a core layer of a Isolator are separated.
- the use of two outer layers, which are made entirely of the conductive material also has the additional advantage that when using a plurality of drive systems per panel no separate power supply for the individual drive systems must be provided. Rather, it is the electrical connection of the respective drive system only necessary the respective connections this Drive system to connect with one of the two cover layers. Also will be included This type of contacting of drive systems a high flexibility in the Arrangement of drive systems in or on the panel achieved because at Changes in the arrangement points of the various drive systems none Redesign of the power supply must be created.
- only one covering layer is made of a conductive one Material necessary if the top layer in at least two from each other isolated segment is divided.
- the core layer used as a power supply when it has conductive areas is also, according to claim 4, the core layer used as a power supply when it has conductive areas.
- these breakthroughs can also be very easy to be used for signal line, if these breakthroughs in accordance with Claim 7 are equipped with a conductor which is connected to the respective conductive Area is connected.
- Such conductors are not on the respective breakthroughs limited conductive plastics, but can also be massive Be wires, because by the leadership of the wires in the breakthroughs the bend the core layer 11 is not hindered across its largest dimension.
- the core layer of a plurality of narrow strips is formed, each strip, with another strip is arranged next to, with this over a plurality of mutually spaced and towards the Narrow side of the soaps extending joints is connected and where the unconnected areas of the strips have a mutual distance, and at least one of these strips is formed of a conductive material, Conductive areas in the core layer without any special effort to be provided.
- the supply of audio signals to the panel is particularly simple if according to claim 9, the panel surrounded by a holder and with this connected is. It is particularly advantageous if the fastening means, with which the panel is connected to the holder, at the same time a conductive Connection between the stationary mounted on the holder Terminals and respective conductive area of cover layer and / or Produce core layer.
- a panel which consists of a core layer 11 and a upper and a lower cover layer 12.1, 12.2 is formed.
- the two Cover layers 12 are on two opposite surfaces of the core layer 11 connected to this.
- the schematic representation of Figure 1 is removable, that the core layer 11 has a breakthroughs 13 Has hole structure.
- the breakthroughs 13 are perpendicular between the two cover layers 12. Only for the sake of completeness it should be noted that the core layer 11 also in other - not shown- embodiments can be formed entirely from a hard foam.
- a voice coil bobbin 14 is inserted, wherein the free end 15 protrudes from the panel 10. Besides, the free end is 15 of the voice coil bobbin 14 is provided with a voice coil 16. Only the For the sake of completeness, it should be pointed out that in the case of a ready-to-use Panel 10, the free end 15 of the voice coil bobbin 14 and voice coil 16th with a drive system not shown in connection.
- the - not shown, but for energizing the voice coil 16 necessary-wire ends are each connected to a conductive area 17.1, 17.2. in the In the embodiment shown in Figure 1, the two conductive Areas 17.1, 17.2 formed of wires, each between the lower Cover layer 12.2 and the core layer 11 run. Also can not in one illustrated embodiment, the conductive regions 17 and wires in corresponding cutout be arranged in the core layer 11. Will the mentioned wires used as conductive areas 17, these should, however, in elastic material can be stored so-called and as a result of bending of the panel 10 may occur under operating conditions To avoid "wire whirr". Because of the improved physical contact the latter measures are superfluous if in the embodiment according to Figure 1 said wires through conductive portions 17 in the form of conductive films are formed, which at the core layer 11 facing Side of the lower cover layer 12.2 are laminated.
- FIG. 2 In the embodiment of Figure 2 are in contrast to the embodiment according to FIG. 1 shows the conductive regions in the middle between the two cover layers 12 passed through the core layer.
- This embodiment has the advantage that at Deflection of the panel 10 under operating conditions on the conductive. Areas no stretching forces act. Therefore, those shown in FIG conductive areas 17 are also formed by solid wires or thorns, which are inserted from the narrow side of the core layer 11 in this.
- the Voice coil 16 is connected to the conductive regions 17 of Figure 2 via flexible Wires 18 electrically connected.
- Figure 3 is a plan view of a core layer 11 is shown, wherein the Core layer 11 covered cover layers 12 have been omitted. These Illustration also illustrates the hole structure of the core layer 11, which in the present case of a plurality of cross-section honeycomb-shaped openings 13 is formed.
- Such hole structures are formed so that initially a plurality of narrow strips are stacked on top of each other. This is where each strip, on another strip is piled up with a plurality of mutually spaced and extending in the direction of the scarf side of the strip Connection points (usually in the form of adhesive beads) provided. are all strips are stacked and connected in this way pulled apart the stack, bringing the hole structure shown in Figure 3 the core layer 11 results.
- Figure 3 is exemplary of six of the shown Breakthroughs 13 'the connection of two strips 19', 19 "shown, wherein the respective connection points between the two strips 19 ', 19 "with a X are marked.
- stiffeners 19 are made of one formed conductive material and form the conductive regions 17.1, 17.2 of Core layer 11. It becomes clear in connection with the last paragraph that by using at least one strip 19 of conductive material conductive areas 17 in the core layer 19 very easily and without switching the Production can be realized. Deviating from Figure 3 only one Strip 19 of conductive material in the core layer 11 according to the last paragraph incorporated into the core layer, must for contacting the Voice coil 16 can be ensured that this one stiffener 19 in two split sections isolated from each other.
- the voice coil 16 In the direction of the figure 3 occurs perpendicular to the paper plane, the voice coil 16 out.
- the respective wire ends (not shown) of the voice coil 16 are via the contact points 20 each with one of the two -aus leitfoundem Material produced strips 19 connected.
- the voice coil 16 an axial distance to Core layer 11 has, the connection between the voice coil 16 and the Stiffening according to FIG. 3 via a corresponding conductor (not shown) be prepared.
- the connection between the conductor and the conductive Plastic can be realized as a plug connection by the plastic in the only plugged in.
- FIG. 4 shows a panel 10 in which the voice coil 16 is inside the core layer 11 is arranged.
- the core layer 11 which is made of an insulator, a recess 21 is formed was and the voice coil 16 with the breakthroughs 13 forming Walls 22 is connected.
- the recess 21 is the only schematically shown drive system 23 integrated.
- the voice coil 16 is by means of flexible wires 18 with the conductive areas 17.1, 17.2 connected, which in this case of the made of conductive material Cover layers 12.1, 12.2 are formed.
- the flexible wire 18 respectively receiving Breakthrough 13 also be foamed with an elastic material. Because the Voice coil 16 must be inserted into the recess 21 before at least the lower cover layer 12.2 is connected to the core layer 11 is the Connection between the flexible wire 18 and the lower cover layer 12.2 solved so that the wire 18 penetrates the under cover 12.2 (indicated by the wire end shown in dashed lines) and by means of the contact point 20th with the side facing away from the core layer 11 of the lower cover layer 12.2 for example soldered.
- the conductive regions 17 exclusively from the upper cover layer 12.1. provided.
- the upper cover layer 12.1 in two from each other divided isolated segments 26.
- the resulting between the segments 26 Gap 27 is closed with a cover strip 28, which-like the Core layer 11- is made of an insulating material.
- the contact between the two segments 26 and the voice coil 16 is as in the Embodiment according to Figure 5 by a foaming with conductive Plastic material 24 realized
- Figure 7 shows the edge 29 of a panel 10. With lateral distance A to the edge 29, a holder 30 is disposed of insulating material, which in this case has a U-shaped Contour has.
- the two cover layers 12, which with the core layer 11 are connected, are guided to the holder 30 and thereby span the Distance A.
- the form conductive regions 17 (approximately according to Figure 5), is guided by the leadership of Both cover layers 12 to the holder 30 at the same time a conductive Connection between the vibratory panel 10 and the fixed bracket 30 realized without much additional effort.
- FIG. 10 An attachment of a panel 10 is also shown in FIG.
- a web 31 which is made of conductive material and in the core layer 11th is inserted and attached.
- the attachment of the web 31 is realized so that the Breakthrough 13, which is completely penetrated by the web 31, with a Plastic material is filled. It is in the Plastic material, which between the web 31 and the upper cover layer 12.1 is arranged to be an insulator, while the plastic material, which is located between the web 31 and the lower cover layer 12.2, a conductive plastic material 24 is. This will ensure that the web 31 is in conductive connection with the lower cover layer 12.2. Only the For completeness, it should be mentioned that the upper - also conductive - cover layer 12.1 at another location of the edge 29 by means of a figure 8 corresponding arrangement is contacted.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Communication Cables (AREA)
Description
Charakteristisch fiir solche Schallwiedergabeanordnungen ist, daß ab einer kritischen unteren Grenzfrequenz eine "Biegewellenabstrahlung" möglich wird, wobei die Biegewellen entlang der Ebene des jeweiligen Paneels zu einer Schallabstrahlung mit frequenzabhängiger Richtung führen. Mit anderen Worten, ein Schnitt durch ein erstelltes Richtdiagramm zeigt eine Hauptkeule, deren Richtung frequenzabhängig ist.
- Figur 1
- ein Paneel in schematischer Seitenansicht;
- Figur 2
- ein weiteres Paneel in schematischer Seitenansicht;
- Figur 3
- eine Kernschicht in Draufsicht (schematisch);
- Figur 4
- ein weiteres Paneel in einer Ansicht gemäß Figur 1;
- Figur 5
- ein weiteres Paneel in einer Ansicht gemäß Figur 1;
- Figur 6
- ein weiteres Paneel in einer Ansicht gemäß Figur 1;
- Figur 7
- eine Randbefestigung für ein Paneel in schematischer Seitenansicht; und
- Figur 8
- eine weitere Randbefestigung für ein Paneel in schematischer Seitenansicht.
Claims (10)
- Anschlußkontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip
mit einem Paneel 10, welches von einer Kernschicht 11, einer oberen und
einer unteren Deckschicht 12.1, 12.2 gebildet ist, wobei die beiden Deckschichten 12 mit jeweils einander gegenüberliegenden Oberflächen der Kernschicht 11 verbunden sind, und
mit wenigstens einem Antriebssystem 23, welche mit dem Paneel 10 in Verbindung steht und welche mittels zweier Leitungen mit einer Tonsignalquelle verbindbar ist,
dadurch gekennzeichnet, daß wenigstens eine der beiden Deckschichten 12.1, 12.2 und/oder die Kernschicht 11 leitfähige Bereiche 17.1, 17.2 aufweist und
daß diese leitfähigen Bereiche 17 mit den Leitungen 33 zur Tonsignalquelle und den jeweiligen Anschlüssen 25 des jeweiligen Antriebssystems 23 leitend verbunden sind. - Anschlußkontaktierung nach Anspruch 1,
dadurch gekennzeichnet, daß die beiden Deckschichten 12 aus leitfähigem Material hergestellt sind und
daß die Kernschicht 11, welche aus einem Isolator gebildet ist, die beiden Deckschichten 12 voneinander isoliert. - Anschlußkontaktierung nach Anspruch 1,
dadurch gekennzeichnet, daß eine der Deckschichten 12 in wenigstens zwei, voneinander isolierte Segmente 26 unterteilt ist und
daß jedes Segment 26 aus leitfähigem Material gebildet ist. - Anschlußkontaktierung nach Anspruch 1,
dadurch gekennzeichnet, daß die Kernschicht 11 leitfähige Bereiche 17 aufweist, die im wesentlichen parallel zu einer der beiden Deckschichten 12 verlaufen. - Anschlußkontaktierung nach Anspruch 4,
dadurch gekennzeichnet, daß die leitfähigen Bereiche 17, welche parallel zu einer der beiden Deckschichten 12 verlaufen, gleichen Abstand zu beiden Deckschichten 12 haben. - Anschlußkontaktierung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Kernschicht 11 eine Durchbrüche 13 aufweisende Lochstruktur hat, wobei die Durchbrüche 13 zwischen den beiden Deckschichten 12 verlaufen, daß die Kernschicht aus einem Isolator gebildet ist, und
daß wenigstens einer dieser Durchbrüche 13 mit einem Leiter 18 versehen ist, welcher mit einem der leitfähigen Bereiche 17 verbunden ist. - Anschlußkontaktierung nach Anspruch 1,
dadurch gekennzeichnet, daß die Kernschicht 11 aus einer Vielzahl schmaler Streifen 19 gebildet ist, wobei jeder Streifen 19, dem ein anderer Streifen 19 neben geordnet ist, mit diesem über eine Mehrzahl von gegenseitig beabstandeten und von in Richtung zur Schmalseite der Seifen 19 verlaufenden Verbindungsstellen X verbunden ist und wobei die nicht verbundenen Bereiche der Streifen 19 einen gegenseitigen Abstand haben, und
daß wenigstens einer dieser Streifen 19 aus einem leitfähigen Material gebildet ist. - Anschlußkontaktierung nach Anspruch 7,
dadurch gekennzeichnet, daß wenigsten einer der Bereiche 17, in welchem ein Streifen 19 aus leitfähigem Material zu einem Streifen 19 aus einem Isolierstoff den besagten gegenseitigen Abstand hat, mit einem Leiter 18; 24 versehen ist, wobei zwischen dem Leiter 18; 24 und dem leitfähigen Streifen 19 eine leitfähige Verbindung besteht. - Anschlußkontaktierung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß das Paneel 10 von einer Halterung 30 umgeben ist;
daß zwischen dem Paneel 10 und der Halterung 30 ein gegenseitiger Abstand A besteht, in welchem ein Befestigungsmittel 12; 33 zwischen Halterung 30 und Paneel 10 angeordnet ist, und
daß die jeweiligen leitfähigen Bereiche 17 von Deckschicht 12.1, 12.2 und/oder Kernschicht 11 ebenfalls bis zur Halterung 30 geführt sind. - Anschlußkontaktierung nach Anspruch 9,
dadurch gekennzeichnet, daß das Befestigungsmittel 12, 30 selbst die leitfähige Verbindung zwischen dem Paneel 10 und der Halterung 30 bildet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19757099A DE19757099A1 (de) | 1997-12-20 | 1997-12-20 | Kontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip |
DE19757099 | 1997-12-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0924957A2 EP0924957A2 (de) | 1999-06-23 |
EP0924957A3 EP0924957A3 (de) | 2005-01-05 |
EP0924957B1 true EP0924957B1 (de) | 2005-11-30 |
Family
ID=7852893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98123816A Expired - Lifetime EP0924957B1 (de) | 1997-12-20 | 1998-12-15 | Anschlusskontaktierung |
Country Status (4)
Country | Link |
---|---|
US (1) | US6560348B1 (de) |
EP (1) | EP0924957B1 (de) |
JP (1) | JPH11252677A (de) |
DE (2) | DE19757099A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19821860A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Treiber für flaches Klangpaneel |
DE19821862A1 (de) * | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Schallwiedergabeanordnung |
DE19825866A1 (de) | 1998-06-10 | 1999-12-16 | Nokia Deutschland Gmbh | Plattenlautsprecher |
DE19843079A1 (de) | 1998-09-19 | 2000-03-23 | Nokia Deutschland Gmbh | Multiresonanzplatte |
DE10001410C2 (de) * | 2000-01-14 | 2001-12-06 | Harman Audio Electronic Sys | Flachlautsprecheranordnung |
TW510139B (en) * | 2001-01-26 | 2002-11-11 | Kirk Acoustics As | An electroacoustic transducer and a coil and a magnet circuit therefor |
US20060153406A1 (en) * | 2003-03-07 | 2006-07-13 | Koninklijke Phlips Electronics N.V. | Bending wave loudspeaker |
CN1954639B (zh) * | 2004-05-14 | 2012-12-05 | 索尼昂荷兰有限公司 | 双隔膜电声换能器 |
NZ741473A (en) | 2015-09-14 | 2024-07-05 | Wing Acoustics Ltd | Improvements in or relating to audio transducers |
WO2018167538A1 (en) | 2017-03-15 | 2018-09-20 | Wing Acoustics Limited | Improvements in or relating to audio systems |
WO2018172944A1 (en) | 2017-03-22 | 2018-09-27 | Wing Acoustics Limited | Systems methods and devices relating to hinges and audio transducers |
US11317212B2 (en) * | 2020-09-12 | 2022-04-26 | Matthew Otis | Flat panel horn loudspeaker |
WO2022121590A1 (zh) * | 2020-12-09 | 2022-06-16 | 青岛海信激光显示股份有限公司 | 发声板及投影屏幕 |
CN112543398B (zh) * | 2020-12-09 | 2023-03-14 | 青岛海信激光显示股份有限公司 | 发声板及投影屏幕 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6181799B1 (en) * | 1995-09-02 | 2001-01-30 | New Transducers Limited | Greetings or the like card |
US1842770A (en) * | 1930-08-22 | 1932-01-26 | Roy E Thompson | Loud speaker |
US2059588A (en) * | 1933-10-12 | 1936-11-03 | Bell Telephone Labor Inc | Acoustic device |
US3651283A (en) * | 1968-12-18 | 1972-03-21 | Audio Arts Inc | Loudspeaker having elongated rectangular moving coil |
DE2151085B2 (de) * | 1971-10-13 | 1973-08-30 | Geratewerk Lahr GmbH, 7630 Lahr | Nachhallplatte mit einem elektromechanischen wandler zur anregung von biegewellen |
DE2819615A1 (de) * | 1978-05-05 | 1979-11-08 | Messerschmitt Boelkow Blohm | Verfahren zur erzielung gleichmaessiger schallverteilungseigenschaften |
JPS5568795A (en) * | 1978-11-20 | 1980-05-23 | Sony Corp | Speaker |
GB2050755B (en) * | 1979-04-10 | 1983-06-29 | Suwa Seikosha Kk | Dynamic loudspeaker |
US4376233A (en) * | 1980-12-18 | 1983-03-08 | Sony Corporation | Securing of lead wires to electro-acoustic transducers |
US4465905A (en) * | 1982-04-28 | 1984-08-14 | International Jensen Incorporated | Loudspeaker assembly |
JPS58195400A (ja) * | 1982-05-11 | 1983-11-14 | Nissan Motor Co Ltd | 車両用音響装置 |
DE3407980A1 (de) * | 1983-04-20 | 1984-10-25 | Tadashi Tokio/Tokyo Sawafuji | Kristallschallerzeuger |
US4782533A (en) * | 1987-01-12 | 1988-11-01 | Haynie James L | Stereophonic pillow speaker system |
US5008945A (en) * | 1988-05-23 | 1991-04-16 | Pioneer Electronic Corp. | Water-proof speaker unit |
JP2981360B2 (ja) * | 1993-03-30 | 1999-11-22 | 株式会社ケンウッド | スピーカ構造 |
SE503180C2 (sv) * | 1994-08-29 | 1996-04-15 | Centara Patent Ab | Elektroakustisk omvandlare |
JPH08186893A (ja) * | 1994-12-28 | 1996-07-16 | Kenwood Corp | スピーカとその製造方法 |
US5701359A (en) * | 1995-04-06 | 1997-12-23 | Precision Power | Flat-panel speaker |
US6188775B1 (en) * | 1995-09-02 | 2001-02-13 | New Transducers Limited | Panel-form loudspeakers |
UA51671C2 (uk) * | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Акустичний пристрій |
US6151402A (en) * | 1995-09-02 | 2000-11-21 | New Transducers Limited | Vibration transducers |
KR19990044068A (ko) * | 1995-09-02 | 1999-06-25 | 에이지마. 헨리 | 패널형 마이크로폰 |
US5818947A (en) * | 1996-11-15 | 1998-10-06 | High Technology Corporation | Reducing flow-induced resonance in a cavity |
DE19757098C2 (de) * | 1997-12-20 | 2003-01-09 | Harman Audio Electronic Sys | Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip |
-
1997
- 1997-12-20 DE DE19757099A patent/DE19757099A1/de not_active Withdrawn
-
1998
- 1998-12-15 DE DE59813242T patent/DE59813242D1/de not_active Expired - Lifetime
- 1998-12-15 EP EP98123816A patent/EP0924957B1/de not_active Expired - Lifetime
- 1998-12-18 US US09/216,154 patent/US6560348B1/en not_active Expired - Lifetime
- 1998-12-21 JP JP10363322A patent/JPH11252677A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE59813242D1 (de) | 2006-01-05 |
JPH11252677A (ja) | 1999-09-17 |
US6560348B1 (en) | 2003-05-06 |
EP0924957A2 (de) | 1999-06-23 |
DE19757099A1 (de) | 1999-06-24 |
EP0924957A3 (de) | 2005-01-05 |
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