EP0022937B1 - Loudspeaker with a multiple path diaphragm - Google Patents
Loudspeaker with a multiple path diaphragm Download PDFInfo
- Publication number
- EP0022937B1 EP0022937B1 EP19800103523 EP80103523A EP0022937B1 EP 0022937 B1 EP0022937 B1 EP 0022937B1 EP 19800103523 EP19800103523 EP 19800103523 EP 80103523 A EP80103523 A EP 80103523A EP 0022937 B1 EP0022937 B1 EP 0022937B1
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- European Patent Office
- Prior art keywords
- spring
- loudspeaker
- diaphragm
- elements
- reusable
- Prior art date
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- 238000010168 coupling process Methods 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 230000005693 optoelectronics Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 32
- 238000013016 damping Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- 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
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
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- 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
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- 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
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Definitions
- the invention relates to a loudspeaker with a reusable diaphragm with a reusable spring arrangement which stabilizes the reusable diaphragm in its vibration axis.
- the invention is intended to prevent tumbling and tumbling movements of the reusable membrane elements of a loudspeaker, which lead to distortions of the acoustic signal.
- the vibration of a diaphragm along an axis can be stabilized by hanging the diaphragm in two spring levels.
- these two spring levels are a spring that attaches to the outside of the diaphragm and can also have the shape of a rubber bead, and a centering spring that attaches to the transition from the diaphragm to the drive coil.
- this centering spring also attaches to either the first or second membrane element.
- a second spring level is only in some cases as a centering spring either on the coil neck or on the outermost membrane element, while the other membrane elements are only suspended in one spring level. This results in tumbling and wobbling movements of the membrane elements, which are manifested as distortions in the acoustic signal.
- the centering spring on the coil neck which competes with the coupling springs, also results in an amplitude modulation because it couples impulse components from the mechanical impulse to the loudspeaker basket that are lost to the radiation.
- the problem of damping mechanical overshoot of the membrane elements has only been taken into account in one construction (cf. FIGS. 8A and 8B in the above-mentioned article by A. B. Cohen). In this case, however, the damping element takes part directly in the coupling process. In this way, the entire energy to be coupled is delayed and the result is phase distortion.
- the object of the present invention is to bring about dynamic stabilization of the reusable diaphragm of a loudspeaker against spinning and tumbling movements without decoupling the impulse components.
- the object is achieved in a speaker with a reusable diaphragm according to the preamble of claim 1 by the features specified in the characterizing part of claim 1.
- the coupling springs have a cross-sectional geometry designed according to Fig. 3.
- the change in the cross-sectional thickness in the radial direction causes the radial change in the spring constant resulting from the radial widening of the springs to be canceled.
- Electronic control of the reusable membrane is achieved by attaching actual value transmitters to the supports, the signal quantities of which are in the same relationship to one another as the radiation surfaces of the associated membrane elements.
- the reusable membrane must be free of interference in order to function. By varying the signal size ratios and changes, any expansion, compression or amplitude limitation can be set. In principle, all known actual value transmitter designs are suitable for controlling a reusable membrane.
- the reusable spring (seen from the side in Fig. 1) consists of the supports (1, 2, 3) and the coupling springs (10, 11, 12).
- the reusable spring element (1, 10) is associated with the high-frequency membrane element (4), the reusable spring element (2, 11) with the mid-range membrane element (5) and the reusable spring element (3, 12) with the bass membrane element (6).
- Fig. 2 shows the reusable spring seen in the direction of deflection.
- Each of the two reusable spring elements (2, 11 and 3, 12) consists of three supports and three semicircular coupling springs, the reusable spring element (1, 10) consists of a support and a concentric coupling spring.
- the reusable spring elements contain fine, rigid connections between the supports and coupling springs belonging to the respective element.
- the reusable spring differs from the known spring suspensions for membranes in that each membrane element is sprung in two planes that are perpendicular to the radiation direction and parallel to one another. One level is the membrane level, the other is a level defined by supports leading backwards.
- the coupling springs may only allow the supports to move in the working direction. This can be caused by the formation of a broad leaf spring, but better a circular spring with a concentric fold or a circular sector of the same.
- the coupling springs should have a surface that is as small as possible so that they emit little sound and the emitted sound is extinguished by interference from the phase and phase components around the spring. In particular, the coupling spring on the tweeter element must be very small. On the other hand, the radial spring length must not be too short so that compression does not occur.
- the radial spring length of the coupling springs within the reusable spring should in any case be at least as long and its spring constant at most the same size as the coupling springs within the reusable membrane, so that the coupled forces work to a large extent within the reusable membrane and the supports and the reusable spring can be easily carried out.
- the mass available for each path can be used to stiffen the membrane elements.
- the coupling springs have a cross-sectional shape, as shown in Fig. 3 for the spring (11).
- the constant spring constant in the radial direction is achieved by manipulating the cross-sectional shape. If the spring material is made thicker at a certain point, the spring constant becomes larger there - also if the curvature describes a shorter or flatter curve up to the turning point of the curve. A change in the spring constant can therefore be achieved by geometry variations of this type.
- the choice of spring material means that all the requirements for elasticity or damping of the spring can be met. This in turn can improve the coupling behavior and thus reduce phase distortion and overshoot.
- Fig.4 shows the damping elements (17) in section, which are attached to all coupling springs and consist, for example, of a mixture of rubber and asbestos fibers.
- the damping elements are each connected to the outer membrane element and therefore also couple the absorbed energy in the same direction as the coupling springs.
- Fig. 5 shows an actual value transmitter (15) for optoelectronic actual value display. It consists of a template with triangular openings, which are illuminated by light in the field (16) when it is deflected in the horizontal direction. The left opening is the modulator of the light transmitter when the membrane is deflected in the positive direction, and the right opening is the modulator when the membrane is deflected in the negative direction from the zero position. The zero position is drawn.
- the light transmitter and light receiver are rigidly connected to the loudspeaker basket (13).
- Each of the three reusable spring elements contains such an actual value transmitter.
- the adaptation to the radiation surface of the associated reusable membrane element is done by changing the acute opening angle of the triangular openings, but can also be achieved by changing the amount of light passing through the surface (16) or the sensitivity of the light receiver.
- the addition of the signal sizes finally gives the measure for the electronic control.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
Die Erfindung betrifft einen Lautsprecher mit Mehrwegmembrane mit einer Mehrwegfederanordnung, die die Mehrwegmembrane in ihrer Schwingungsachse stabilisiert.The invention relates to a loudspeaker with a reusable diaphragm with a reusable spring arrangement which stabilizes the reusable diaphragm in its vibration axis.
Die Erfindung soll Trudel- und Taumelbewegungen der Mehrwegmembranelemente eines Lautsprechers verhindern, die zu Verzerrungen des akustischen Signals führen.The invention is intended to prevent tumbling and tumbling movements of the reusable membrane elements of a loudspeaker, which lead to distortions of the acoustic signal.
Wie bereits bekannt, ist die Schwingung einer Membrane entlang einer Achse dadurch zu stabilisieren, daß die Membrane in zwei Federebenen aufgehängt wird. Bei gewöhnlichen Einweglautsprechern sind diese beiden Federebenen eine Feder, die außen an der Membrane ansetzt und auch die Form einer Gummisicke haben kann, und eine Zentrierfeder, die am Übergang der Membrane zur Antriebsspule ansetzt. Bei den bekannten Ausführungen von Mehrwegmembranen setzt diese Zentrierfeder ebenfalls entweder am ersten oder zweiten Membranelement an. (Quellen : A. B. Cohen : « HiFi-Loudspeakers and Enclosures », Verlag : John F. Rider Publisher Inc. New York, 1956, S. 44 bis 47 ; A. B. Cohen : « Mechanical Crossover Characteristics in Dual Diaphragm Loudspeakers », Journal of the Audio Engineering Society, Volume 5, January 1957, Number 1 ; DE-A-27 51 700).As already known, the vibration of a diaphragm along an axis can be stabilized by hanging the diaphragm in two spring levels. In ordinary disposable loudspeakers, these two spring levels are a spring that attaches to the outside of the diaphragm and can also have the shape of a rubber bead, and a centering spring that attaches to the transition from the diaphragm to the drive coil. In the known versions of reusable membranes, this centering spring also attaches to either the first or second membrane element. (Sources: AB Cohen: "HiFi-Loudspeakers and Enclosures", publisher: John F. Rider Publisher Inc. New York, 1956, pp. 44 to 47; AB Cohen: "Mechanical Crossover Characteristics in Dual Diaphragm Loudspeakers", Journal of the Audio Engineering Society,
Aus der FR-A-2296985 ist ein optoelektronischer Istwertgeber bei einer Anordnung zur Regelung der Spulenauslenkung eines elektrodynamischen Lautsprechers bekannt.From FR-A-2296985 an optoelectronic actual value transmitter with an arrangement for controlling the coil deflection of an electrodynamic loudspeaker is known.
Regelungsanordnungen für die elektronische Auslenkungskontrolle von Mehrwegmembrane sind bislang nicht bekannt.Control arrangements for the electronic deflection control of reusable diaphragms are not yet known.
In den bekannten Konstruktionen einer Mehrwegmembrane befindet sich eine zweite Federebene nur in einigen Fällen als Zentrierfeder entweder am Spulenhals oder am äußersten Membranelement, während die übrigen Membranelemente nur in einer Federebene aufgehängt sind. Dies hat Trudel- und Taumelbewegungen der Membranelemente zur Folge, die sich als Verzerrungen des akustischen Signals äußern. Durch die mit den Koppelfedern konkurrierende Zentrierfeder am Spulenhals ergibt sich außerdem eine Amplitudenmodulation, weil sie lmpulsanteile aus dem mechanischen Impuls auf den Lautsprecherkorb auskoppelt, die der Abstrahlung verloren gehen. Das Problem der Dämpfung mechanischen Überschwingens der Membranelemente ist nur in einer Konstruktion berücksichtigt worden (vgl. die Fig. 8A und 8B im o. a. Artikel von A. B. Cohen). In diesem Fall nimmt das dämpfende Element jedoch direkt am Koppelvorgang teil. So wird die gesamte weiter zu koppelnde Energie zeitlich verzögert und im Resultat zur Phasenverzerrung.In the known constructions of a reusable membrane, a second spring level is only in some cases as a centering spring either on the coil neck or on the outermost membrane element, while the other membrane elements are only suspended in one spring level. This results in tumbling and wobbling movements of the membrane elements, which are manifested as distortions in the acoustic signal. The centering spring on the coil neck, which competes with the coupling springs, also results in an amplitude modulation because it couples impulse components from the mechanical impulse to the loudspeaker basket that are lost to the radiation. The problem of damping mechanical overshoot of the membrane elements has only been taken into account in one construction (cf. FIGS. 8A and 8B in the above-mentioned article by A. B. Cohen). In this case, however, the damping element takes part directly in the coupling process. In this way, the entire energy to be coupled is delayed and the result is phase distortion.
Ein weiteres Problem beim mechanischen Koppeln über eine Feder ergibt sich durch die herkömmliche Form der Federn. Ihre gewöhnlich sägezahnförmige Querschnittsform ergibt unterschiedliche rücktreibende Kräfte in den beiden Bewegungsrichtungen der Membrane, weil jede Sägezahnflanke nur in der Richtung federt, in der sie gekrümmt wird, so daß der Teil der Feder, der in der einen Bewegungsrichtung wirkt, eine andere tangentiale Federbreite bzw. ein anderes Umfangsintegral hat als der andere.Another problem with mechanical coupling via a spring arises from the conventional shape of the springs. Their usually sawtooth-shaped cross-sectional shape results in different restoring forces in the two directions of movement of the diaphragm, because each sawtooth flank springs only in the direction in which it is curved, so that the part of the spring which acts in one direction of movement has a different tangential spring width or has a different scope integral than the other.
Diese Kritik gilt sinngemäß für rechteckige oder trapezförmige Querschnitte. Nur bei gleichförmig gekrümmtem Querschnitt, wie er bisher nur bei Kalottenhochtönern verwendet wird, ergibt sich insofern eine Verbesserung, als in den federnden Zonen wenigstens auch eine Streckung möglich ist. Es ist jedoch zu bedenken, daß diese Federn ja in radialer Richtung Verbreiterung aufweisen. Somit ist eine Symmetrie, die im radialen Querschnitt noch gegeben ist, bei der üblichen Ringform nicht mehr vorhanden. Praktisch nimmt also die Federkonstante in radialer Richtung zum Mittelpunkt hin ab.This criticism applies analogously to rectangular or trapezoidal cross sections. Only in the case of a uniformly curved cross section, as has hitherto only been used in dome tweeters, is there an improvement insofar as at least stretching is also possible in the resilient zones. However, it should be borne in mind that these springs widen in the radial direction. A symmetry that is still present in the radial cross section is therefore no longer present in the usual ring shape. In practice, the spring constant decreases in the radial direction towards the center.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine dynamische Stabilisierung der Mehrwegmembrane eines Lautsprechers gegen Trudel- und Taumelbewegungen ohne Auskopplung von Impulsanteilen zu bewirken.The object of the present invention is to bring about dynamic stabilization of the reusable diaphragm of a loudspeaker against spinning and tumbling movements without decoupling the impulse components.
Die Aufgabe wird bei einem Lautsprecher mit Mehrwegmembrane entsprechend dem Oberbegriff des Anspruches 1 durch die im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmale gelöst.The object is achieved in a speaker with a reusable diaphragm according to the preamble of
Die Koppelfedern haben eine nach Abb. 3 gestaltete Querschnittsgeometrie. Die Änderung der Querschnittsdicke in radialer Richtung bewirkt eine Aufhebung der durch radiale Verbreiterung der Federn entstehenden radialen Änderung der Federkonstante.The coupling springs have a cross-sectional geometry designed according to Fig. 3. The change in the cross-sectional thickness in the radial direction causes the radial change in the spring constant resulting from the radial widening of the springs to be canceled.
Ein mechanisches Überschwingen wird durch Dämpfungselemente nach Abb. 4 verhindert. Diese Elemente liegen entweder an den Federn an oder befinden sich in geringem Abstand davon, sind jedoch immer nur mit den einzukoppelnden Stützen verbunden. Das Ziel der praktischen Ausführung muß sein, daß die Dämpfungselemente die Kopplung selbst möglichst wenig beeinflussen, jedoch die durch Überschwingen erzeugten hohen Frequenzanteile mechanisch auskoppeln und wegfiltern.A mechanical overshoot is prevented by damping elements according to Fig. 4. These elements either rest on the springs or are at a short distance from them, but are always only connected to the supports to be coupled in. The goal of the practical Aus leadership must be that the damping elements influence the coupling itself as little as possible, but mechanically decouple and filter away the high frequency components generated by overshoot.
Eine elektronische Regelung der Mehrwegmembrane wird dadurch erreicht, daß an den Stützen Istwertgeber befestigt sind, deren Signalgrößen im gleichen Verhältnis zueinander stehen wie die Abstrahlflächen der zugehörigen Membranelemente. Voraussetzung für ein Funktioniren ist Interferenzfreiheit der Mehrwegmembrane. Durch Variation der Signalgrößenverhältnisse und -änderung läßt sich zudem eine beliebige Expansion, Kompression oder Amplitudenbegrenzung einstellen. Grundsätzlich eignen sich alle bekannten Istwertgeberkonstruktionen für die Regelung einer Mehrwegmembrane.Electronic control of the reusable membrane is achieved by attaching actual value transmitters to the supports, the signal quantities of which are in the same relationship to one another as the radiation surfaces of the associated membrane elements. The reusable membrane must be free of interference in order to function. By varying the signal size ratios and changes, any expansion, compression or amplitude limitation can be set. In principle, all known actual value transmitter designs are suitable for controlling a reusable membrane.
Die Mehrwegfeder (von der Seite gesehen in Abb. 1) besteht aus den Stützen (1, 2, 3) und den Koppelfedern (10, 11, 12). Dabei ist das Mehrwegfederelement (1, 10) dem Hochtonmembranelement (4), das Mehrwegfederelement (2, 11) dem Mitteltonmembranelement (5) und das Mehrwegfederelement (3, 12) dem Baßmembranelement (6) zugeordnet. Abb. 2 zeigt die Mehrwegfeder in Auslenkungsrichtung gesehen. Jedes der zwei Mehrwegfederelemente (2, 11 und 3, 12) besteht aus drei Stützen und drei halbkreisförmigen Koppelfedern, das Mehrwegfederelement (1, 10) besteht aus einer Stütze und einer konzentrischen Koppelfeder. Die Mehrwegfederelemente enthalten feine, starre Verbindungen zwischen den zum jeweiligen Element gehörigen Stützen und Koppelfedern.The reusable spring (seen from the side in Fig. 1) consists of the supports (1, 2, 3) and the coupling springs (10, 11, 12). The reusable spring element (1, 10) is associated with the high-frequency membrane element (4), the reusable spring element (2, 11) with the mid-range membrane element (5) and the reusable spring element (3, 12) with the bass membrane element (6). Fig. 2 shows the reusable spring seen in the direction of deflection. Each of the two reusable spring elements (2, 11 and 3, 12) consists of three supports and three semicircular coupling springs, the reusable spring element (1, 10) consists of a support and a concentric coupling spring. The reusable spring elements contain fine, rigid connections between the supports and coupling springs belonging to the respective element.
Die Mehrwegfeder unterscheidet sich von den bekannten Federaufhängungen für Membranen dadurch, daß jedes Membranelement in zwei zur Abstrahlrichtung senkrechten, zueinander parallelen Ebenen gefedert ist. Dabei ist die eine Ebene die Membranebene, die andere eine durch nach hinten führende Stützen definierte Ebene. Die Koppelfedern dürfen eine Bewegung der Stützen nur in Arbeitsrichtung erlauben. Dies kann durch die Ausbildung zu einer breiten Blattfeder bewirkt werden, besser aber einer Kreisfeder mit konzentrischer Faltung oder einem Kreissektor derselben. Die Koppelfedern sollen eine möglichst kleine Oberfläche haben, damit sie wenig Schall abstrahlen und sich der abgestrahlte Schall durch Interferenz von mit- und gegenphasigem Anteil um die Feder herum auslöscht. Insbesondere die Kopplungsfeder am Hochtonelement muß also sehr klein sein. Andererseits darf die radiale Federlänge nicht zu kurz sein, damit nicht Kompression eintritt.The reusable spring differs from the known spring suspensions for membranes in that each membrane element is sprung in two planes that are perpendicular to the radiation direction and parallel to one another. One level is the membrane level, the other is a level defined by supports leading backwards. The coupling springs may only allow the supports to move in the working direction. This can be caused by the formation of a broad leaf spring, but better a circular spring with a concentric fold or a circular sector of the same. The coupling springs should have a surface that is as small as possible so that they emit little sound and the emitted sound is extinguished by interference from the phase and phase components around the spring. In particular, the coupling spring on the tweeter element must be very small. On the other hand, the radial spring length must not be too short so that compression does not occur.
Die radiale Federlänge der Koppelfedern innerhalb der Mehrwegfeder soll auf jeden Fall mindestens gleichlang und ihre Federkonstante höchstens gleichgroß sein wie der Koppelfedern innerhalb der Mehrwegmembrane, damit die verkoppelten Kräfte zum größeren Teil innerhalb der Mehrwegmembrane arbeiten und die Stützen und die Mehrwegfeder leicht ausgeführt werden können. So kann die für jeden Weg verfügbare Masse zur Versteifung der Membranelemente eingesetzt werden.The radial spring length of the coupling springs within the reusable spring should in any case be at least as long and its spring constant at most the same size as the coupling springs within the reusable membrane, so that the coupled forces work to a large extent within the reusable membrane and the supports and the reusable spring can be easily carried out. The mass available for each path can be used to stiffen the membrane elements.
Die Koppelfedern haben eine Querschnittsform, wie in Abb. 3 für die Feder (11) dargestellt. Die in radialer Richtung gleichbleibende Federkonstante wird durch eine Manipulation der Querschnittsform erreicht. Wird das Federmaterial an einer bestimmten Stelle dicker gemacht, so wird dort die Federkonstante größer - ebenso, wenn die Krümmung bis zum Wendepunkt der Krümmungskurve einen kürzeren oder flacheren Bogen beschreibt. Eine Änderung der Federkonstante läßt sich also durch Geometrievariationen dieser Art erzielen.The coupling springs have a cross-sectional shape, as shown in Fig. 3 for the spring (11). The constant spring constant in the radial direction is achieved by manipulating the cross-sectional shape. If the spring material is made thicker at a certain point, the spring constant becomes larger there - also if the curvature describes a shorter or flatter curve up to the turning point of the curve. A change in the spring constant can therefore be achieved by geometry variations of this type.
Da die Federcharakteristik gemäß der Erfindung nur durch Manipulation der Querschnittsform erzielt wird, können durch die Wahl des Federmaterials alle Anforderungen an Elastizität bzw. Dämpfung der Feder erfüllt werden. Dadurch kann wiederum eine Verbesserung des Koppelverhaltens und somit Verminderung von Phasenverzerrungen und Überschwingen erreicht werden.Since the spring characteristic according to the invention can only be achieved by manipulating the cross-sectional shape, the choice of spring material means that all the requirements for elasticity or damping of the spring can be met. This in turn can improve the coupling behavior and thus reduce phase distortion and overshoot.
Abb.4 zeigt die Dämpfungselemente (17) im Schnitt, die an allen Koppelfedern angebracht sind und beispielsweise aus einer Mischung von Gummi und Asbestfasern bestehen. Die Dämpfungselemente sind jeweils mit dem äußeren Membranelement verbunden und koppeln deshalb auch die aufgenommene Energie in derselben Richtung wie die Koppelfedern weiter.Fig.4 shows the damping elements (17) in section, which are attached to all coupling springs and consist, for example, of a mixture of rubber and asbestos fibers. The damping elements are each connected to the outer membrane element and therefore also couple the absorbed energy in the same direction as the coupling springs.
Abb. 5 zeigt einen Istwertgeber (15) für optoelektronische Istwertdarstellung. Er besteht aus einer Schablone mit dreieckigen Öffnungen, die in dem Feld (16) von Licht durchstrahlt werden, wenn sie in horizontaler Richtung ausgelenkt wird. Dabei ist die linke Öffnung der Modulator des Lichtsenders, wenn die Membrane in positiver Richtung ausgelenkt wird, und die rechte Öffnung der Modulator, wenn die Membrane in negativer Richtung aus der Nullage ausgelenkt wird. Gezeichnet ist die Nullage. Lichtsender und Lichtempfänger sind starr mit dem Lautsprecherkorb (13) verbunden.Fig. 5 shows an actual value transmitter (15) for optoelectronic actual value display. It consists of a template with triangular openings, which are illuminated by light in the field (16) when it is deflected in the horizontal direction. The left opening is the modulator of the light transmitter when the membrane is deflected in the positive direction, and the right opening is the modulator when the membrane is deflected in the negative direction from the zero position. The zero position is drawn. The light transmitter and light receiver are rigidly connected to the loudspeaker basket (13).
Jedes der drei Mehrwegfederelemente enthält einen derartigen Istwertgeber. Die Anpassung an die Abstrahlfläche des zugehörigen Mehrwegmembranelementes geschieht durch Änderung der spitzen Öffnungswinkel der dreieckigen Öffnungen, kann aber auch durch Änderung der durch die Fläche (16) durchtretenden Lichtmenge oder der Lichtempfängerempfindlichkeit erreicht werden. Die Addition der Signalgrößen ergibt schließlich das maß für die elektronische Regelung.Each of the three reusable spring elements contains such an actual value transmitter. The adaptation to the radiation surface of the associated reusable membrane element is done by changing the acute opening angle of the triangular openings, but can also be achieved by changing the amount of light passing through the surface (16) or the sensitivity of the light receiver. The addition of the signal sizes finally gives the measure for the electronic control.
1,2,3 Stützen zwischen Membranelementen und Mehrwegfeder
- 4. 1. Weg : Hochtonmembranelement
- 5. 2. Weg : Mitteltonmembranelement
- 6. 3. Weg : BaBmembranelement
- 7. 1. Weg : Hochtonfeder der Mehrwegmembrane
- 8. 2. Weg : Mitteltonfeder der Mehrwegmembrane
- 9. 3. Weg : Baßfeder der Mehrwegmembrane
- 10 1. Weg : Hochtonfeder der Mehrwegfeder
- 11 2. Weg : Mitteltonfeder der Mehrwegfeder
- 12 3. Weg : BaBfeder der Mehrwegfeder
- 13 Lautsprecherkorb, solidarisch mit dem Gehäuse
- 14 Antriebsspule
- 15 optoelektronische Istwertgeber
- 16 Lichtdurchtrittsöffnung der Schablone
- 17 Dämpfungselemente
- 4. 1. Way: Tweeter membrane element
- 5. 2nd way: Mid-tone membrane element
- 6. 3rd way: BaB membrane element
- 7. Way 1: Tweeter spring of the reusable membrane
- 8. Way 2: Mid-tone spring of the reusable membrane
- 9. 3rd way: bass spring of the reusable membrane
- 10 1st way: Tweeter spring of the reusable spring
- 11 2nd way: middle tone spring of the reusable spring
- 12 3rd way: spring of the reusable spring
- 13 speaker basket, in solidarity with the housing
- 14 drive coil
- 15 optoelectronic actual value transmitters
- 16 light passage opening of the template
- 17 damping elements
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2927848 | 1979-07-10 | ||
| DE19792927848 DE2927848C2 (en) | 1979-07-10 | 1979-07-10 | Loudspeaker with reusable membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0022937A1 EP0022937A1 (en) | 1981-01-28 |
| EP0022937B1 true EP0022937B1 (en) | 1983-10-26 |
Family
ID=6075346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19800103523 Expired EP0022937B1 (en) | 1979-07-10 | 1980-06-24 | Loudspeaker with a multiple path diaphragm |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0022937B1 (en) |
| DE (1) | DE2927848C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3603537A1 (en) * | 1986-02-05 | 1987-08-06 | Pfleid Wohnraumakustik Gmbh | BROADBAND SPEAKER |
| DE3733000A1 (en) * | 1987-09-30 | 1989-04-13 | Rainer Cornelius Friz | Damping elements for multiway diaphragms |
| DE10002567C1 (en) * | 2000-01-21 | 2001-09-27 | Siemens Audiologische Technik | Miniature electric-acoustic transducer |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB329376A (en) * | 1929-02-18 | 1930-05-19 | Reginald Henry Parkinson | Improvements in and relating to sound reproducing diaphragms |
| FR1275613A (en) * | 1959-12-03 | 1961-11-10 | Villamossagi | Mechanically crossed wideband loudspeaker |
| GB1350122A (en) * | 1970-10-29 | 1974-04-18 | Electronic Res Ass | Sound reproducing equipment |
| FR2296985A1 (en) * | 1975-01-02 | 1976-07-30 | Lan Yan Fock Alain | Distortion corrector fo r loudspeaker - uses modulation of ligit path to phototransistor providing feedback signal to drive amplifier |
| DE2626652C3 (en) * | 1976-06-15 | 1979-11-22 | Friedemann Dipl.-Ing. 8000 Muenchen Meggl | Control arrangement for sound transmitters |
| JPS5393816A (en) * | 1977-01-28 | 1978-08-17 | Hitachi Ltd | Diaphragm of speaker |
| DE2751700A1 (en) * | 1977-11-19 | 1979-05-23 | Rainer C Friz | Wide frequency responsive loudspeaker diaphragm - has mechanical filtering provided by elastic parts linking concentric rigid parts |
| DE2752433C2 (en) * | 1977-11-24 | 1980-01-31 | Backes & Mueller Gmbh, 6650 Homburg | Induction coil for generating a negative feedback voltage in loudspeakers |
-
1979
- 1979-07-10 DE DE19792927848 patent/DE2927848C2/en not_active Expired
-
1980
- 1980-06-24 EP EP19800103523 patent/EP0022937B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2927848A1 (en) | 1981-04-30 |
| EP0022937A1 (en) | 1981-01-28 |
| DE2927848C2 (en) | 1982-05-19 |
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