EP0022937B1 - Haut-parleur comportant une membrane à voie multiple - Google Patents

Haut-parleur comportant une membrane à voie multiple Download PDF

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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
Authority
EP
European Patent Office
Prior art keywords
spring
loudspeaker
diaphragm
elements
reusable
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
Application number
EP19800103523
Other languages
German (de)
English (en)
Other versions
EP0022937A1 (fr
Inventor
Rainer Cornelius Friz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRIZ, RAINER CORNELIUS
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0022937A1 publication Critical patent/EP0022937A1/fr
Application granted granted Critical
Publication of EP0022937B1 publication Critical patent/EP0022937B1/fr
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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
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Claims (5)

1. Ensemble haut-parleur comportant un diaphragme à plusieurs voies suspendu au bord avant d'un saladier (13) de haut-parleur par le ressort (9), entraîné par une bobine mobile (14) et composé des éléments concentriques (4, 5, 6) de diaphragme, éléments reliés entre eux par les ressorts de couplage (7, 8), ensemble pour lequel les différents éléments de ressort de masse (4, 5, 6, 7, 8, 9) sont couplés selon le type d'un aiguillage mécanique de fréquence de manière à ce que pour les hautes fréquences l'élément diaphragme des aiguës (tweeter) (4) set met seul en oscillation et, pour les fréquences basses, les éléments de diaphragme (5, 6) se trouvant plus vers l'extérieur se trouvent couplés dans l'oscillation, ensemble caractérisé par un aménagement de ressorts à plusieurs voies (1, 2, 3, 10, 11, 12) suspendu sur le côté arrière du saladier (13) de haut-parleur et pour lequel des ressorts de couplage (10, 11, 12) se trouvent insérés dans un plan et que, entre les ressorts de couplage (10, 11, 12), des supports (1, 2, 3) sont prévus, supports qui sont reliés de manière rigide avec les éléments correspondants de diaphragme (4, 5, 6) (figures 1, 2).
2. Ensemble haut-parleur suivant la revendication 1, caractérisé par une géométrie de section des ressorts de couplage (10, 11, 12) dont l'épaisseur augmente vers le point milieu des ressorts concentriques (fig. 3).
3. Ensemble haut-parleur suivant la revendication 1, caractérisé par des éléments d'atténuation (17) fixés dans chaque cas avant et derrière les ressorts de couplage (10, 11, 12) sur des supports (2, 3) à coupler et sur le saladier (13) de haut-parleur et qui sont aménagés soit directement sur les ressorts de couplage (10, 11, 12) soit en respectant un intervalle à ces derniers (fig. 4).
4. Ensemble haut-parleur suivant la revendication 1, caractérisé en ce qu'il comporte des transmetteurs opto-électroniques de valeur effective sur chaque support (1, 2, 3) de chaque élément ressort à plusieurs voies (1, 10, 2, 11, 3, 12) comportant une trame opaque (15) avec des ouvertures symétriques de lumière, ouvertures présentant la forme des triangles à ailes égales, droites ou courbées et qui présentent l'une par rapport à l'autre un rapport de surface comparable à celui des éléments de diaphragme (4, 5, 6) reliés par les supports (1, 2, 3) et dont la déviation est mesurée de manière opto-électronique par des émetteurs et récepteurs de lumière liés de manière rigide avec le saladier (13) haut-parleur et ce sur les côtés opposés des trames dans le champ (16), ensemble pour lequel la somme des quantités reçues de lumière constitue le taux pour le rattrapage électronique de la déviation de diaphragme, par l'intermédiaire de la bobine mobile (15) (fig.5).
EP19800103523 1979-07-10 1980-06-24 Haut-parleur comportant une membrane à voie multiple Expired EP0022937B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792927848 DE2927848C2 (de) 1979-07-10 1979-07-10 Lautsprecher mit Mehrwegmembrane
DE2927848 1979-07-10

Publications (2)

Publication Number Publication Date
EP0022937A1 EP0022937A1 (fr) 1981-01-28
EP0022937B1 true EP0022937B1 (fr) 1983-10-26

Family

ID=6075346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800103523 Expired EP0022937B1 (fr) 1979-07-10 1980-06-24 Haut-parleur comportant une membrane à voie multiple

Country Status (2)

Country Link
EP (1) EP0022937B1 (fr)
DE (1) DE2927848C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603537A1 (de) * 1986-02-05 1987-08-06 Pfleid Wohnraumakustik Gmbh Breitbandlautsprecher
DE3733000A1 (de) * 1987-09-30 1989-04-13 Rainer Cornelius Friz Daempfungselemente fuer mehrwegmembranen
DE10002567C1 (de) * 2000-01-21 2001-09-27 Siemens Audiologische Technik Elektrisch-akustischer Miniaturwandler

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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 (fr) * 1959-12-03 1961-11-10 Villamossagi Haut-parleur à bande large mécaniquement croisé
GB1350122A (en) * 1970-10-29 1974-04-18 Electronic Res Ass Sound reproducing equipment
FR2296985A1 (fr) * 1975-01-02 1976-07-30 Lan Yan Fock Alain Compteur-comparateur pour l'asservissement d'un haut-parleur electrodynamique
DE2626652C3 (de) * 1976-06-15 1979-11-22 Friedemann Dipl.-Ing. 8000 Muenchen Meggl Regelungsanordnung für Schallsender
JPS5393816A (en) * 1977-01-28 1978-08-17 Hitachi Ltd Diaphragm of speaker
DE2751700A1 (de) * 1977-11-19 1979-05-23 Rainer C Friz Lautsprechermehrwegmembrane mit mechanischer frequenzweiche
DE2752433C2 (de) * 1977-11-24 1980-01-31 Backes & Mueller Gmbh, 6650 Homburg Induktionsspule zur Gewinnung einer Gegenkopplungsspannung bei Lautsprechern

Also Published As

Publication number Publication date
DE2927848C2 (de) 1982-05-19
EP0022937A1 (fr) 1981-01-28
DE2927848A1 (de) 1981-04-30

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