EP1086606B1 - Plattenlautsprecher - Google Patents
Plattenlautsprecher Download PDFInfo
- Publication number
- EP1086606B1 EP1086606B1 EP99924965A EP99924965A EP1086606B1 EP 1086606 B1 EP1086606 B1 EP 1086606B1 EP 99924965 A EP99924965 A EP 99924965A EP 99924965 A EP99924965 A EP 99924965A EP 1086606 B1 EP1086606 B1 EP 1086606B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- panel
- borders
- width
- centre
- gravity
- 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.)
- Revoked
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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
- 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 so-called plate speakers, which according to the Bending shaft principle work, especially on the positioning of the drivers on Panel loudspeaker.
- plate loudspeakers which according to Bending shaft principle work.
- Such arrangements are essentially formed by a panel and at least one drive system, the Panel is vibrated when the drive system (s) electrical audio frequency signals are supplied.
- Characteristic of such Sound reproducing devices is that from a lower cut-off frequency, the so-called critical frequency a "bending wave radiation" is possible, the bending waves in the plane of the respective panel to a Lead sound radiation with frequency-dependent direction.
- a section through a created directional diagram shows a main lobe, the Direction is frequency dependent.
- the panel of the panel loudspeaker is constructed according to the sandwich principle, in that preferably two opposing surfaces of a light core layer are each connected to a cover layer that is thin compared to the core layer, for example by gluing.
- the material for the cover layer must have a particularly high expansion wave speed.
- Suitable cover layer materials are, for example, thin metal foils or fiber-reinforced plastic foils. Special requirements are also placed on the core layer, because this layer must above all have a particularly low density (for example 20 to 30 kg / m 3) .
- the core layer should be able to absorb high shear stresses normal to the cover layers.
- the modulus of elasticity in the direction normal to the cover layers must be sufficiently large, while a very low modulus of elasticity does not interfere parallel to the cover layers.
- the core layer can show anisotropic or isotropic behavior.
- honeycombs made of light metal alloys or resin-impregnated fiber-reinforced papers (anisotropic) and rigid foams (isotropic) have proven themselves as ultra-light core layer structures.
- the panels are driven by drivers that -as shown in DE-A-197 57 097- either placed on the respective panel or integrated into it.
- the drivers are approximately in the form of electrodynamic shakers or piezoelectric bending vibration disks as Drive elements predominantly in the center or close to the edge be attached, although from the consideration of individual, undisturbed Vibration modes of rectangular panels appear to make more sense in other places could.
- the difficulty lies in optimizing the excitation position considering the driver feedback, considering many, but especially the low-frequency fashions and taking into account the acoustic contributions of each vibration mode in each considered Modal frequency.
- One solution would be modeling using the finite element method combined with a numerical solution to the acoustic Field equations and with a stochastic variation of the boundary conditions and exact positions in the range of realistic tolerances.
- Another solution would exist in the practical testing of ready-made record speakers random driver positions. Both conceivable solution methods are very consuming.
- WO97 / 09842 describes a procedure with which suitable points for mounting drivers on a panel can be determined. However, they are based on this Places determined in particular when using fixed in panels clamped in a frame as disadvantageous proved. In addition, the known procedure offers only a small selection of attachment points, so that the Applications are very limited overall.
- the invention is therefore based on the object of positioning areas for drivers to specify which driver, based on the area of the panel without large Effort and can be placed with high efficiency.
- the positioning range extends between one Edge zone, which is directly adjacent to the edges of the panel in the direction of the Focus panels and a focus zone, which is around extends the center of gravity of the panel, there is a high yield in the available vibration modes are reached and at the same time become unfavorable Point impedances avoided.
- the Width B of the edge zone must be at least 5% of the diagonals of the panel, um to reduce the point impedances.
- a particularly sustainable reduction occurs of the fixed clamping when the width B of the edge zone has values of takes about 10% of the diagonals of the panel.
- the center of gravity should have a diameter D of have at least 20% of the diagonal of the panel. Smaller diameter values lead to a disproportionate exclusion of vibration modes for the Drive the panel.
- the panel on compliant elements with the frame connected, the center of gravity should be cruciform because the areas immediately adjacent to those through the centers of the edges and the Connect the center of gravity of the panel running side bisectors as not have proven suitable for the positioning of drivers.
- the Reductions can be designed as specified in claim 5.
- the panel does not have a square, but an elongated one Shape, the width should be for different long edges of the panel be different.
- width B1 of the edge zone, which runs along the long edges of the panel is greater than the width B2 of the Edge zone, which runs along the short edges.
- the width B1 should be at least 10% and B2 be at least 5% of the diagonal of the panel.
- the parallel to the long Edge areas of the panel-running surface areas have a width 3.1 of 2.5% or greater and parallel to the short edges of the panels extending surface areas a width 3.2 greater than or equal to 17% of the Have diagonals of the panel.
- the distance A1 about 7% and the distance A2 about 14% of the diagonals of the panel.
- FIG. 1 is a plan view, not to scale, of a Record speakers 10 shown.
- This plate speaker 10 is in essentially of a panel 11 in sandwich construction, two drivers 12 and a Ralunen 13 formed. Since the panel 11 in the present Embodiment is elongated, edges are of different lengths 14 available, namely the long edges 14.l and the short edges 14.k.
- the Panel 11 is rigidly connected to the ralune 13 at its edges 14.
- the Drivers 12 are integrated in the panels 11 and are therefore only indicated in FIG. 1.
- Positioning area for drivers is identified by reference numeral 15.
- This positioning area 15, which is dotted for better illustration, extends between an edge zone 16 which is directly adjacent to the edges 14 connects and has a width B, and a center of gravity 17 with a Diameter D1.
- Under focus zone 17 is related to this application understood the area of the panel 11, the focus S of the panel 11 surrounds.
- the edge zone 16 which in the present exemplary embodiment is uniform Width B of 10% of the diagonal D of the panel 11 can be in another - Not shown- embodiment for the different lengths of edges 14.l, 14.k be of different widths. But even in this case, the Edge zone 16 has the greatest possible width B in order to achieve point impedances excluded.
- the focus zone 17 in the present case has a diameter D1 of 25% Diagonals D of the panel 11. To as many vibration modes for the To use the drive of the panel 11, the focus zone 17 should also be chosen as large as possible.
- Fig. 2 is another embodiment for an optimal Positioning area 15 (15.1 to 15.4) shown.
- the panel 11 on its edges 14.l, 14.k by means of elastic elements 18th connected to the frame 13. Only for the sake of completeness noted that the type of connection between frame 13 and panel 11 not much influence for the optimal positioning of the driver 12 on the Panel 11 has, so that those shown in the embodiment of FIG. 1 Ratios largely also for plate speakers 10 according to Fig.2 and apply in reverse.
- the edge zone 16 does not have a uniform width B. Rather, they are edge zones 16 with the width running parallel to the long edges 14.l. B1 wider than the edge zones 16 running parallel to the short edges 14.k. with the width B2.
- the dependence of the different widths B1, B2 on the size The panel 11 is given by the fact that the width B1 is approximately 16% and the width B2 is approximately 6.3% of the diagonal D of the panel 11.
- the width B3 (B3.1, B3.2) of both surface strips 17 ', 17 " is of different sizes in order to still have a reasonably large processing area 15 for to get the drivers 12.
- 14.k is the width B3.2 of the area strip 17 ', which runs parallel to the long edge 14.l, 2.9% and the width B3.1 of the other area strip 17 "17.4% of the diagonals D of the panel 11.
- Two sides of each reduction 20 are used by the Inner edges 21 of the edge zone 16 are formed.
- the third pages of the triangular reductions 20 lie on a line 22, which - as shown in Fig. 2 - connects the centers M of all edges 14 together.
- the distance A1 between the driver 12 and the center line is M '6.9% and the distance A2 between driver 12 and center line M "14% of the Diagonals D of the panel 11.
- Driver 12 meet the distance requirements to the center lines M ', M ", the conditions in another - not shown - embodiment not be fulfilled for all drivers 12.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
-wie in DE-A-197 57 097 gezeigt- entweder am jeweilige Paneel aufgesetzt oder in diesem integriert sind.
- Fig. 1
- eine Draufsicht auf einen Plattenlautsprecher; und
- Fig. 2
- eine weitere Darstellung gemäß Fig. 2.
Claims (12)
- Plattenlautsprecher mit
einem Ränder (14, 14.l, 14.k) und einen Schwerpunkt (S) aufweisende Paneel (11) und
mit einem Rahmen (13), welcher mit dem Paneel (11) verbunden ist und
wenigstens einem mit dem Paneel (11) verbundenen Treiber (12),
gekennzeichnet durch
eine unmittelbar an die Ränder (14, 14.l, 14.k) des Panneels (11) anschließende, sich zum Schwerpunkt (S) hin erstreckende Randzone (16), deren Breite (B) mindestens 5% der Diagonalen (D) des Paneels (11) beträgt,
eine sich um den Schwerpunkt (S) erstreckende Schwerpunktzone (17) mit einem Durchmesser (D1), der mindestens 25% der Diagonalen (D) des Paneels (11) beträgt, und
einen sich zwischen Schwerpunktzone (17) und Randzone (16) erstreckenden Positionierbereich (15, 15.1 - 15.4), in dem der/die Treiber (12) ausschließlich angeordnet sind. - Plattenlautsprecher nach Anspruch 1,
dadurch gekennzeichnet, dass
das Paneel (11) fest in einem Rahmen (13) eingespannt ist. - Plattentlautsprecher nach Anspruch 1,
dadurch gekennzeichnet, dass
das Paneel (11) über nachgiebige Elemente (18) mit dem Rahmen (13) verbunden ist,
die Schwerpunktzone (17) ein kreuzförmiger Flächenbereich ist und von zwei durch den Schwerpunkt (S) des Paneels (11) verlaufenden, rechtwinklig zueinander angeordneten und die Randzone (16) auf kürzestem Weg verbindenden Flächenstreifen (17', 17") gebildet wird. - Plattenlautsprecher nach Anspruch 3,
dadurch gekennzeichnet, dass
die sich durch die kreuzförmige Ausbildung der Schwerpunktzone (17, 17', 17") ergebenden vier Positionierbereiche (15.1 bis 15.4) nahe den Bereichen, an denen jeweils zwei Ränder (14.l, 14.k) des Paneels (11) eine Ecke (19) bilden, eine Verkleinerung (20) aufweisen. - Plattenlautsprecher nach Anspruch 4,
dadurch gekennzeichnet, dass
die Verkleinerungen (20) der Positionierbereiche (15.1 bis 15.4) dreieckförmig ausgebildet sind, wobei zwei Seiten einer jeden dreieckförmigen Verkleinerung (20) von den Innenrändern (21) der Randzone (16) und die verbleibenden Seiten der dreieckförmigen Verkleinerungen (20) auf einem geschlossenen Linienzug (22) liegen, der die Mitten (M) der Ränder (14, 14.l, 14.k) verbindet. - Plattenlautsprecher nach einem der Ansprüche 2 bis 5
dadurch gekennzeichnet, dass
das Paneel (11) rechteckig ausgebildet ist, wobei jeweils zwei eine Ecke (19) bildende Ränder (14.l, 14.k) des Paneels (11) eine unterschiedliche Länge haben, und dass die Breite (B) der Randzonen (16) für unterschiedliche Ränder (14.l, 14.k) des Paneels (11) unterschiedlich breit ist. - Plattenlautsprecher nach Anspruch 6,
dadurch gekennzeichnet, dass
eine erste Breite (B1) der Randzone (16), welche an die langen Ränder (14.l) des Paneels (11) anschließt, grösser ist als eine zweite Breite (B2) der Randzone (16), welche an die kurzen Ränder (14.k) des Paneels (11) anschließt. - Plattenlautsprecher nach Anspruch 7,
dadurch gekennzeichnet, dass
die erste Breite (B1) mindestens 10% und die zweite Breite (B2) mindestens 5% der Diagonalen (D) des Paneels (11) entspricht. - Plattenlautsprecher nach einem der Ansprüche 3 bis 8,
dadurch gekennzeichnet, dass
die beiden sich kreuzenden Flächenbereiche (17', 17") eine unterschiedlich große Breite (B3) haben. - Plattenlautsprecher nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, dass
die beiden sich kreuzenden Flächenbereiche (17', 17") eine unterschiedlich große Breite (B3) haben, wobei der parallel zu den langen Rändern (14.1) des Paneels (1) verlaufende Flächenbereich (17') eine Breite (3.1) von größer/gleich 2,5% und der Flächenbereich (17"), welcher parallel zu den kurzen Rändern (14.k) des Paneels (11) verläuft, eine Breite (3.2) von größer/gleich 17% der Diagonalen (D) des Paneels (11) hat. - Plattenlautsprecher nach einem der Ansprüche 6 bis 10,
daurch gekennzeichnet, dass
die Treiber (12) zu den sich im Schwerpunkt (S) schneidenden und im übrigen parallel zu den langen und kurzen Rändern (14.1, 14.k) verlaufenden Mittellinien (M', M") jeweils einen Abstand einhalten, wobei ein erster Abstand (A1) den Abstand der Treiber (12) zu der parallel zum langen Rand (14.1) verlaufenden Mittellinie (M') und ein zweiter Abstand (A2) den Abstand der Treiber (12) zu der parallel zum kurzen Rand (14.k) verlaufenden Mittellinie (M") angibt und dass
der erste Abstand (A1) kleiner ist als der zweite Abstand (A2). - Plattenlautsprecher nach Anspruch 11,
dadurch gekennzeichnet, dass
der erste Abstand (A1) etwa 7% und der zweite Abstand (A2) etwa 14% der Diagonalen (D) des Paneels (11) beträgt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19825866 | 1998-06-10 | ||
DE19825866A DE19825866A1 (de) | 1998-06-10 | 1998-06-10 | Plattenlautsprecher |
PCT/EP1999/003307 WO1999065273A1 (de) | 1998-06-10 | 1999-05-14 | Plattenlautsprecher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1086606A1 EP1086606A1 (de) | 2001-03-28 |
EP1086606B1 true EP1086606B1 (de) | 2002-04-10 |
Family
ID=7870481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99924965A Revoked EP1086606B1 (de) | 1998-06-10 | 1999-05-14 | Plattenlautsprecher |
Country Status (5)
Country | Link |
---|---|
US (1) | US6836552B1 (de) |
EP (1) | EP1086606B1 (de) |
JP (1) | JP2002518910A (de) |
DE (2) | DE19825866A1 (de) |
WO (1) | WO1999065273A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6836552B1 (en) | 1998-06-10 | 2004-12-28 | Harman Audio Electronic Systems Gmbh | Panel loudspeakers |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10001410C2 (de) * | 2000-01-14 | 2001-12-06 | Harman Audio Electronic Sys | Flachlautsprecheranordnung |
DE10058102C2 (de) * | 2000-11-23 | 2003-07-03 | Harman Audio Electronic Sys | Elektrodynamischer Biegemomententreiber |
GB0123932D0 (en) * | 2001-10-05 | 2001-11-28 | New Transducers Ltd | Loudspeakers |
DE10154915B4 (de) * | 2001-11-08 | 2005-02-03 | Harman/Becker Automotive Systems Gmbh (Harman Division) | Flachlautsprecheranordnung |
US20040038722A1 (en) * | 2002-08-22 | 2004-02-26 | Michael Gauselmann | Gaming machine having a distributed mode acoustic radiator |
JP2009516460A (ja) * | 2005-11-14 | 2009-04-16 | エヌエックスピー ビー ヴィ | 圧電スピーカ及び非対称スピーカの非対称可動システム |
JP4524700B2 (ja) * | 2007-11-26 | 2010-08-18 | ソニー株式会社 | スピーカ装置およびスピーカ駆動方法 |
KR101802723B1 (ko) * | 2013-05-08 | 2017-11-29 | 고어텍 인크 | 평판형 저음 스피커 및 이를 적용한 전자장치 |
KR101707083B1 (ko) * | 2013-05-08 | 2017-02-15 | 고어텍 인크 | 평판형 저음 스피커 |
KR101707085B1 (ko) * | 2013-05-08 | 2017-02-15 | 고어텍 인크 | 평판형 저음 스피커 |
DE102015217778B4 (de) * | 2015-09-17 | 2019-05-29 | Robert Bosch Gmbh | Akustischer Sensor mit einer Membran und einem elektroakustischen Wandler |
KR102370183B1 (ko) | 2017-07-12 | 2022-03-03 | 엘지디스플레이 주식회사 | 표시장치 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
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US3247925A (en) * | 1962-03-08 | 1966-04-26 | Lord Corp | Loudspeaker |
DE1132593B (de) * | 1965-04-05 | 1962-07-05 | Bolt Beranek & Newman | Akustisch wirksame Platte, insbesondere zur Ankopplung an einen elektroakustischen Wandler |
JPS5474417A (en) * | 1977-11-26 | 1979-06-14 | Sony Corp | Multi-point driving type speaker |
JPS5525285A (en) * | 1978-08-14 | 1980-02-22 | Sony Corp | Speaker |
US4426556A (en) | 1980-07-08 | 1984-01-17 | Matsushita Electric Industrial Co., Ltd. | Electrodynamic loudspeaker |
US4969197A (en) * | 1988-06-10 | 1990-11-06 | Murata Manufacturing | Piezoelectric speaker |
ATE117155T1 (de) | 1990-08-04 | 1995-01-15 | Secr Defence Brit | Paneelförmiger lautsprecher. |
JP3148520B2 (ja) * | 1994-06-06 | 2001-03-19 | 株式会社ケンウッド | スピーカ構造 |
UA51671C2 (uk) | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Акустичний пристрій |
KR19990037726A (ko) * | 1995-09-02 | 1999-05-25 | 헨리 에이지마 | 판넬형 음향 방사소자들로 구성된 라우드스피커 |
US6031926A (en) * | 1996-09-02 | 2000-02-29 | New Transducers Limited | Panel-form loudspeakers |
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 |
DE19757099A1 (de) | 1997-12-20 | 1999-06-24 | Nokia Deutschland Gmbh | Kontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip |
DE19821624A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Projektionswand |
DE19821860A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Treiber für flaches Klangpaneel |
DE19821861A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Vorrichtung zur dynamischen Anregung von Plattenlautsprechern |
DE19821862A1 (de) | 1998-05-15 | 1999-11-18 | Nokia Deutschland Gmbh | Schallwiedergabeanordnung |
DE19825866A1 (de) | 1998-06-10 | 1999-12-16 | Nokia Deutschland Gmbh | Plattenlautsprecher |
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 |
US20030147541A1 (en) | 2001-01-26 | 2003-08-07 | Wolfgang Bachmann | Flat-panel loudspeaker |
-
1998
- 1998-06-10 DE DE19825866A patent/DE19825866A1/de not_active Ceased
-
1999
- 1999-05-14 WO PCT/EP1999/003307 patent/WO1999065273A1/de not_active Application Discontinuation
- 1999-05-14 US US09/719,279 patent/US6836552B1/en not_active Expired - Fee Related
- 1999-05-14 DE DE59901200T patent/DE59901200D1/de not_active Revoked
- 1999-05-14 JP JP2000554166A patent/JP2002518910A/ja active Pending
- 1999-05-14 EP EP99924965A patent/EP1086606B1/de not_active Revoked
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6836552B1 (en) | 1998-06-10 | 2004-12-28 | Harman Audio Electronic Systems Gmbh | Panel loudspeakers |
Also Published As
Publication number | Publication date |
---|---|
EP1086606A1 (de) | 2001-03-28 |
WO1999065273A1 (de) | 1999-12-16 |
DE59901200D1 (de) | 2002-05-16 |
DE19825866A1 (de) | 1999-12-16 |
US6836552B1 (en) | 2004-12-28 |
JP2002518910A (ja) | 2002-06-25 |
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