EP0749265B1 - Haut-parleur pour fréquences élevées - Google Patents
Haut-parleur pour fréquences élevées Download PDFInfo
- Publication number
- EP0749265B1 EP0749265B1 EP96401270A EP96401270A EP0749265B1 EP 0749265 B1 EP0749265 B1 EP 0749265B1 EP 96401270 A EP96401270 A EP 96401270A EP 96401270 A EP96401270 A EP 96401270A EP 0749265 B1 EP0749265 B1 EP 0749265B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- loudspeaker
- diaphragm
- membrane
- annular
- fixed structure
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
Definitions
- the present invention relates to a speaker for frequencies high.
- a speaker has a vibrating membrane sound generator, said membrane being connected to this effect to a moving electromagnetic coil suspended in the air gap created by the pole pieces of a permanent magnet and powered by a representative electric current sounds to reproduce.
- the present invention relates to more particularly a speaker with compression chamber.
- compression chamber loudspeakers do not radiate directly into the air, but through through an acoustic pavilion. Such speakers therefore generally have an acoustic horn removable and a compression chamber motor.
- said compression chamber motor it basically there are two different embodiments which are known and marketed.
- the speaker membrane is made in the form of a rigid spherical cap, often metallic and fixed on the chassis of said speaker by means of a flexible suspension peripheral.
- the moving electromagnetic coil is connected at the periphery of said membrane, between said membrane and said suspension, and, during a movement, it displaces said entire cap like a piston infinitely rigid. It will be noted that, by its flexibility, said suspension has for the function of ensuring the movement and guiding of the moving part of the loudspeaker.
- diaphragm in a second embodiment, corresponding to a diaphragm tweeter, diaphragm includes a rigid central annular part and a part also rigid peripheral ring, connected together the along an annular junction opposite the pavilion of said speaker. Said annular parts are further connected to the chassis of said speaker via elastic suspensions, said elastic suspensions being formed by concentric softening lines to said annular parts, and generally practiced in these last.
- the membrane is also moves like a piston extremely rigid.
- this embodiment has the disadvantage larger than the membrane, too small in area, and whose suspension is too rigid, does not allow this speaker to operate from 500 Hz.
- the object of the present invention is to remedy these drawbacks. It concerns a loudspeaker for frequencies high, lighter at equivalent performance than prior art speakers and susceptible to be carried out easily and at reduced cost, while allowing to emit sound waves according to a bandwidth very wide, especially towards high frequencies, with a Improved efficiency.
- the loudspeaker for frequencies high with a vibrating membrane comprising a central annular part and an annular part peripheral connected together along an annular junction located opposite the waveguide of said loudspeaker, said membrane being connected at said junction annular to a suspended electromagnetic coil in the air gap of the pole pieces of a permanent magnet and powered by an electric current representative of the sounds to reproduce, is remarkable in that said membrane is made of a flexible and elastic material so as to present a defined deformation during the movement of said electromagnetic coil, and in that said annular parts are curved and are directly connected by their free end to a fixed structure of said loudspeaker, the convex side of said annular parts being arranged opposite said waveguide.
- the bulging of said annular parts can take all possible forms, in particular that of an arc of circle or that of a half-torus.
- At least one of said annular parts is connected to said fixed structure so as to form blades of air relative to said fixed structure.
- said air gaps have a decreasing thickness gradually towards the membrane attachment area on the fixed structure.
- said air knives can be formed on one side or on both sides of the membrane.
- At least one of said annular parts is provided with softening lines radially uniformly distributed over the periphery of said annular part, which increases the flexibility of the membrane.
- This flexibility can be increased, according to another mode of realization, by practicing at least on one of said annular parts of the radial slots uniformly distributed on the periphery of said annular part and in closing said slots by means of a flexible resin and elastic.
- said waveguide is a horn and said membrane and said electromagnetic coil constitute a motor with compression chamber.
- the loudspeaker for high frequencies 1 conforms to the invention and shown partially and schematically in the single figure usually comprises a coil electromagnetic 3, connected to a one-piece vibrating membrane 4, suspended in the air gap 5 of the pole pieces 6 and 7 a permanent magnet 8 and powered by a current electric representative of the sounds to reproduce.
- the above elements are produced symmetrically relative to the X-X axis of said speaker 1.
- the membrane 4 is of the type comprising an annular part central 9 and a peripheral annular part 10 connected together along an annular junction 11 which is located next to a waveguide which, in this case, is shown in the form of a flag 12.
- the coil 3 is connected to said membrane 4 at this junction annular 11, directly facing the mouth of said pavilion 12.
- said membrane 4 is produced in a flexible and elastic material, as light as possible, by example a composite material or a high modulus polymer of Young, so as to present a defined deformation during the movement of said electromagnetic coil 3, and said annular parts 10 and 9 are curved and are directly connected by their free end respectively 13 and 14 to a fixed structure specified below of the said loudspeaker 1, the convex side of said annular parts 9 and 10 being located opposite said pavilion 12.
- a displacement of the coil 3 causes a deformation in the membrane 4, which moves from the junction 11 towards the ends 13 and 14 and which causes a variation in the local pressure, generating sound. Thanks to the invention, this variation in pressure is created near the coil 3 and it is oriented in the same direction as the propagation of the deformation in the membrane 4, which allows energy efficiency high with regard to energy transformation mechanical in acoustic energy.
- the volume swept by the deformation of the membrane 4 can be higher than that swept by a rigid membrane of the same size moving like a piston, like this is generally the case for known membranes.
- greater sensitivity is imparted to the speaker 1.
- the bulging of said annular parts 9 and 10 can take all possible axisymmetric forms, in particularly that of an arc of a circle or that of a half-torus.
- the free ends 13 and 14 of said annular parts 10 and 9 are fixed by being embedded between elements of the fixed structure of the loudspeaker 1, namely between said horn 12 and a fixing piece 15 for the end 13 and between a phasing part 16 and a attachment 17 for end 14.
- said air knives 13A, 13B, 14A and 14B have thickness gradually decreasing towards the area fixing ends 13 and 14, which allows to spread in the frequency domain the advantageous effects generated by these air knives and specified below.
- the piece of phasing 16 generally conical, can be very simple and inexpensive.
- this fitting piece phase 16 the fixing piece 17 and the pole piece 7 are connected together by means of a screw 18 of axis X-X through an appropriately practiced cylindrical hole in these different rooms.
- a screw 18 of axis X-X through an appropriately practiced cylindrical hole in these different rooms.
- others fixing methods can be considered. It is the same for unspecified fixing of other parts of the loudspeaker 1.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
- la bobine mobile doit déplacer la totalité de la masse de la partie mobile du haut-parleur, ce qui limite l'émission des sons en hautes fréquences et suppose notamment l'utilisation d'aimants lourds et coûteux pour compenser ce défaut ;
- pour des raisons de performance des haut-parleurs, les matériaux utilisés doivent être le plus léger possible tout en restant extrêmement rigides. Le béryllium est par exemple utilisé pour réaliser ladite membrane, ce qui augmente bien entendu le coût de ces haut-parleurs ; et
- il est nécessaire de prévoir une pièce de mise en phase extrêmement complexe en conception et en réalisation, puisqu'il est nécessaire de faire converger en phase à l'embouchure du pavillon le rayonnement élémentaire de chaque partie de la surface de la membrane.
- d'émettre des sons à des fréquences élevées ;
- d'utiliser une pièce de mise en phase simple et peu coûteuse ; et
- d'engendrer la variation de pression génératrice de son, en regard de la bobine électromagnétique, ce qui est favorable pour la production de fréquences élevées.
- il peut émettre des sons à des fréquences élevées, au moins jusqu'à 16 kHz pour certains modes de réalisation ;
- il peut être réalisé, de même que la pièce de mise en phase associée, de façon simple et à coût réduit, puisque sa structure est du type annulaire ;
- il présente une surface émissive importante pour un diamètre déterminé de la bobine ; et
- la membrane peut être réalisée en un matériau, par exemple un matériau composite ou un polymère à haut module de Young, moins coûteux que celui utilisé dans les modes de réalisation connus précités, puisqu'on ne lui demande plus d'être quasiment infiniment rigide.
- premièrement, si on essayait d'adjoindre à ladite membrane du type "CSD" une partie annulaire externe à la bobine mobile, en vue de rendre la membrane annulaire, le flux sonore engendré par cette partie annulaire externe ne pourrait converger vers l'embouchure du pavillon dans le même temps que le flux sonore engendré par la partie annulaire interne, condamnant dans ce cas ce perfectionnement ;
- deuxièmement, le pavillon ou guide d'ondes est en regard du côté concave de ladite membrane et non du côté convexe comme dans la présente invention ;
- troisièmement, la prise de pression de l'embouchure du pavillon n'est pas située directement en regard de la bobine mobile, comme dans le cas de l'invention.
- le haut-parleur 1 peut émettre des sons jusqu'à des fréquences sensiblement plus élevées que les haut-parleurs de l'état de la technique ;
- il peut être réalisé de façon simple et à coût réduit ;
- il présente une surface émissive importante (au niveau des deux parties annulaires souples 9 et 10) pour un diamètre déterminé de la bobine 3 ; et
- il présente un encombrement réduit car il peut notamment être réalisé avec un aimant plus petit que dans les modes de réalisation connus, puisque la masse à déplacer est moins importante.
- soit des lignes d'assouplissement radiales non représentées, uniformément réparties sur la périphérie desdites parties annulaires ;
- soit des fentes radiales non représentées, également réparties uniformément sur la périphérie et fermées au moyen d'une résine élastique et souple, par exemple du latex de butyle.
- elles créent une rigidité dynamique et provoquent un amortissement visqueux ;
- elles permettent de réduire de façon dynamique la surface émissive de la membrane en fonction de la vitesse vibratoire ; et
- elles repoussent les modes propres naturels de la membrane vers les hautes fréquences.
Claims (10)
- Haut-parleur pour fréquences élevées (1) comportant une membrane vibrante (4) comprenant une partie annulaire centrale (9) et une partie annulaire périphérique (10) reliées ensemble le long d'une jonction annulaire (11) située en regard du guide d'ondes (12) dudit haut-parleur (1), ladite membrane (4) étant reliée au niveau de ladite jonction annulaire (11) à une bobine électromagnétique mobile (3) suspendue dans l'entrefer (5) des pièces polaires (6, 7) d'un aimant permanent (8) et alimentée par un courant électrique représentatif des sons à reproduire,
caractérisé en ce que ladite membrane (4) est réalisée en une matière souple et élastique de manière à présenter une déformation définie lors du mouvement de ladite bobine électromagnétique (3), et en ce que lesdites parties annulaires (9, 10) sont bombées et sont directement reliées par leur extrémité libre (13, 14) à une structure fixe dudit haut-parleur (1), le côté convexe desdites parties annulaires (9, 10) étant disposé en regard dudit guide d'ondes (12). - Haut-parleur selon la revendication 1,
caractérisé en ce qu'au moins l'une desdites parties annulaires (9, 10) est reliée à ladite structure fixe de manière à former des lames d'air (13A, 13B, 14A, 14B) par rapport à ladite structure fixe. - Haut-parleur selon la revendication 2,
caractérisé en ce que lesdites lames d'air (13A, 13B, 14A, 14B) présentent une épaisseur décroissant progressivement vers la zone de fixation de la membrane (4) sur la structure fixe. - Haut-parleur selon l'une des revendications 2 ou 3,
caractérisé en ce que lesdites lames d'air sont formées d'un seul côté de la membrane. - Haut-parleur selon l'une des revendications 2 ou 3,
caractérisé en ce que lesdites lames d'air (13A, 13B, 14A, 14B) sont formées des deux côtés de la membrane (4). - Haut-parleur selon l'une quelconque des revendications précédentes,
caractérisé en ce qu'au moins l'une desdites parties annulaires est munie de lignes d'assouplissement radiales uniformément réparties sur la périphérie de ladite partie annulaire. - Haut-parleur selon l'une quelconque des revendications précédentes,
caractérisé en ce qu'au moins l'une desdites parties annulaires est munie de fentes radiales uniformément réparties sur la périphérie de ladite partie annulaire et fermées au moyen d'une résine souple et élastique. - Haut-parleur selon l'une quelconque des revendications précédentes,
caractérisé en ce que ladite membrane (4) est réalisée en un matériau composite. - Haut-parleur selon l'une des revendications 1 à 7,
caractérisé en ce que ladite membrane (4) est réalisée en un polymère à haut module de Young. - Haut-parleur selon l'une quelconque des revendications précédentes,
caractérisé en ce que ledit guide d'ondes (12) est un pavillon et en ce que ladite membrane (4) et ladite bobine électromagnétique (3) constituent un moteur à chambre de compression.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9507198 | 1995-06-16 | ||
FR9507198A FR2735646B1 (fr) | 1995-06-16 | 1995-06-16 | Haut-parleur pour frequences elevees |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0749265A1 EP0749265A1 (fr) | 1996-12-18 |
EP0749265B1 true EP0749265B1 (fr) | 2000-05-17 |
Family
ID=9480075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96401270A Expired - Lifetime EP0749265B1 (fr) | 1995-06-16 | 1996-06-12 | Haut-parleur pour fréquences élevées |
Country Status (7)
Country | Link |
---|---|
US (1) | US5875252A (fr) |
EP (1) | EP0749265B1 (fr) |
JP (1) | JPH099390A (fr) |
AT (1) | ATE193174T1 (fr) |
CA (1) | CA2178532A1 (fr) |
DE (1) | DE69608351T2 (fr) |
FR (1) | FR2735646B1 (fr) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0669405B2 (ja) * | 1988-12-20 | 1994-09-07 | 吉田工業株式会社 | ジグザグ型連続フアスナーエレメントの製造方法 |
US5878148A (en) * | 1996-02-29 | 1999-03-02 | Alexandrov; Svetlomir | Compression driver |
US6320970B1 (en) * | 1998-09-25 | 2001-11-20 | Eugene J. Czerwinski | High frequency compression drivers |
DK176614B1 (da) * | 1999-02-17 | 2008-11-17 | Tymphany Denmark As | Höjttaler |
US6466680B1 (en) * | 1999-10-19 | 2002-10-15 | Harman International Industries, Inc. | High-frequency loudspeaker module for cinema screen |
JP4582368B2 (ja) * | 2000-06-05 | 2010-11-17 | ソニー株式会社 | スピーカ装置 |
ITBS20010073A1 (it) * | 2001-10-03 | 2003-04-03 | Outline Di Noselli G & C S N C | Altoparlante a guida d'onda a dispersione controllata e regolabile |
JP4445182B2 (ja) * | 2002-03-29 | 2010-04-07 | パイオニア株式会社 | スピーカ装置 |
GB2388488B (en) * | 2002-05-07 | 2005-07-27 | Trevor William Stride | A loudspeaker with an elliptical diaphragm |
US20040066947A1 (en) * | 2002-10-04 | 2004-04-08 | Geddes Earl Rossell | Transducer with multiple phase plugs |
US20040159490A1 (en) * | 2003-02-03 | 2004-08-19 | Marlin Bruce E. | Compact loudspeaker and control switch assembly and method for installing and adjusting a loudspeaker in a partition |
GB2418097A (en) * | 2004-09-09 | 2006-03-15 | Anthony John Andrews | Loudspeaker suspension element extends radially-inward to centre polepiece |
US8470066B2 (en) * | 2004-10-29 | 2013-06-25 | Clarkson University | Aqueous-based method for producing ultra-fine metal powders |
JP2006333064A (ja) * | 2005-05-26 | 2006-12-07 | Pioneer Electronic Corp | リング型スピーカ装置 |
CN101048014B (zh) * | 2006-03-27 | 2011-04-27 | 顾康 | 一种高频扬声器 |
EP2854421B1 (fr) * | 2007-07-25 | 2017-12-06 | Sinar Baja Electric Ltd. | Membrane en forme d'anneau pour haut-parleur électro-acoustique |
GB2451259B (en) * | 2007-07-25 | 2011-07-20 | Gp Acoustics | Loudspeaker |
WO2009122573A1 (fr) * | 2008-04-02 | 2009-10-08 | パイオニア株式会社 | Dispositif de haut-parleur |
FR2955446B1 (fr) * | 2010-01-15 | 2015-06-05 | Phl Audio | Transducteur electrodynamique a dome et suspension flottante |
FR2955445B1 (fr) | 2010-01-15 | 2013-06-07 | Phl Audio | Transducteur electrodynamique a dome et suspension interne |
FR2955444B1 (fr) | 2010-01-15 | 2012-08-03 | Phl Audio | Systeme de haut-parleur coaxial a chambre de compression |
US8428295B2 (en) | 2010-07-09 | 2013-04-23 | Aperion Audio, Inc. | Loudspeaker that is axially stabilized out of the diaphragm suspension plane |
US9014412B2 (en) | 2010-07-09 | 2015-04-21 | Aperion Audio, Inc. | Loudspeaker that is axially stabilized out of the diaphragm suspension plane |
DE102012102207B3 (de) * | 2012-03-15 | 2013-08-29 | BMS Speakers GmbH | Ringmembran-Kompressionstreiber |
US10327068B2 (en) * | 2017-11-16 | 2019-06-18 | Harman International Industries, Incorporated | Compression driver with side-firing compression chamber |
US10397694B1 (en) | 2018-04-02 | 2019-08-27 | Sonos, Inc. | Playback devices having waveguides |
US12015895B2 (en) | 2020-11-10 | 2024-06-18 | Panasonic Intellectual Property Management Co., Ltd. | Speaker |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB400343A (en) * | 1932-06-22 | 1933-10-26 | Leonard Young | Improvements in and relating to sound reproducing instruments |
US2058208A (en) * | 1935-12-21 | 1936-10-20 | Bell Telephone Labor Inc | Acoustic device |
FR2518348B1 (fr) * | 1981-12-16 | 1987-04-10 | Guyot Michel | Membrane de haut-parleur et procede pour sa fabrication |
JP2647659B2 (ja) * | 1987-08-29 | 1997-08-27 | ソニー株式会社 | 音響材料 |
JPH01259698A (ja) * | 1988-04-08 | 1989-10-17 | Res Dev Corp Of Japan | 振動板、電気音響変換器および振動板の製造方法 |
DE4031742A1 (de) * | 1990-10-06 | 1992-04-09 | Nokia Unterhaltungselektronik | Kalotten-hochton-lautsprecher |
-
1995
- 1995-06-16 FR FR9507198A patent/FR2735646B1/fr not_active Expired - Lifetime
-
1996
- 1996-06-06 US US08/659,361 patent/US5875252A/en not_active Expired - Lifetime
- 1996-06-07 CA CA002178532A patent/CA2178532A1/fr not_active Abandoned
- 1996-06-12 DE DE69608351T patent/DE69608351T2/de not_active Expired - Lifetime
- 1996-06-12 AT AT96401270T patent/ATE193174T1/de not_active IP Right Cessation
- 1996-06-12 EP EP96401270A patent/EP0749265B1/fr not_active Expired - Lifetime
- 1996-06-14 JP JP8153846A patent/JPH099390A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE69608351T2 (de) | 2001-01-04 |
JPH099390A (ja) | 1997-01-10 |
DE69608351D1 (de) | 2000-06-21 |
EP0749265A1 (fr) | 1996-12-18 |
FR2735646A1 (fr) | 1996-12-20 |
ATE193174T1 (de) | 2000-06-15 |
CA2178532A1 (fr) | 1996-12-17 |
US5875252A (en) | 1999-02-23 |
FR2735646B1 (fr) | 1997-08-22 |
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