EP2163120A2 - Dynamic sound transducer, and receiver - Google Patents

Dynamic sound transducer, and receiver

Info

Publication number
EP2163120A2
EP2163120A2 EP08715665A EP08715665A EP2163120A2 EP 2163120 A2 EP2163120 A2 EP 2163120A2 EP 08715665 A EP08715665 A EP 08715665A EP 08715665 A EP08715665 A EP 08715665A EP 2163120 A2 EP2163120 A2 EP 2163120A2
Authority
EP
European Patent Office
Prior art keywords
dynamic
membrane
sound transducer
transducer
coil
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.)
Granted
Application number
EP08715665A
Other languages
German (de)
French (fr)
Other versions
EP2163120B1 (en
Inventor
Till Teske-Fischer
Markus Kuhr
Vladimir Gorelik
Dirk Hackbarth
Heinz Epping
Burkhard Markmann
Axel Grell
André Michaelis
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.)
Sennheiser Electronic GmbH and Co KG
Original Assignee
Sennheiser Electronic GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sennheiser Electronic GmbH and Co KG filed Critical Sennheiser Electronic GmbH and Co KG
Publication of EP2163120A2 publication Critical patent/EP2163120A2/en
Application granted granted Critical
Publication of EP2163120B1 publication Critical patent/EP2163120B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials

Definitions

  • the present invention relates to a dynamic sound transducer and a listener.
  • a voice coil is provided in the region of the diaphragm bead, with coil wires being used to contact the voice coil.
  • the coil wires thus connect the diaphragm edge and the voice coil.
  • the provision of such coil wires in the production of dynamic transducers manufacturing technology very complex and can lead to rejects of the sound transducer, for example, when clutter or coil wire tears are present. Since the coil wires are typically laid only on one side of the membrane, an asymmetric mechanical force can be exerted on the voice coil, so that an undesired tumbling of the membrane may be present.
  • US 2004/0141629 A1 shows a dynamic sound transducer with a membrane, wherein a voice coil is arranged in the region of the membrane bead. At the Edge of the membrane, two electrodes are provided, which are connected to the voice coil. The connecting portions between the electrodes and the voice coil are coated with an electrically conductive polymer layer.
  • Dynamic transducers also typically include a diaphragm having a crimp and a dome.
  • the upper limit frequency of such a dynamic sound transducer depends on the size of the surface which emits sound. The larger the sound-radiating surface, the lower the upper limit frequency of the frequency response. When the sound emitting area is enlarged, an audio signal with a reduced distortion can be reproduced.
  • a dynamic transducer is provided with a membrane system having at least a first and second metallized surface, which are separated by an insulating surface of each other.
  • the dynamic transducer further comprises a voice coil with a coil wire. One end of the coil wire is connected to the first metallized surface, and the other end of the coil wire is electrically connected to the second metallized surface.
  • the membrane system is arranged in a chassis. At least two contact elements are arranged on the chassis such that the first contact element with electrically conductive the first metallized surface is connected and the second contact element is electrically conductively connected to the second metallized surface.
  • the present invention also relates to a sound transducer with a membrane system, which has a first and second bead and a voice coil, which is arranged in the region between the first and second bead.
  • the invention also relates to a dynamic sound transducer with a diaphragm, a voice coil, and a magnet system.
  • the magnet system in this case has a magnetic ring made of a plurality of magnet segments.
  • the invention further relates to a receiver with a sound transducer and a curved baffle.
  • the invention relates to the idea of providing a dynamic sound transducer with a membrane which is (half-sidedly) coated with a conductive coating.
  • the center of the membrane can have an insulating strip, which has no conductive coating.
  • the surface of the conductive coating can be divided into two mutually insulated sections.
  • the coil wires of the coil can be cut short and be attached or glued in an immediate proximity to the coil electrically conductive to the membrane, so that an electrical connection with the membrane edge on the conductive layer of the membrane is provided.
  • the chassis of the dynamic transducer may have two conductive lines, with the membrane having the conductive coating glued to the chassis so that the conductive coating of the membrane has a conductive contact with the chassis.
  • FIG. 1a shows a schematic plan view of a membrane according to a first embodiment
  • Fig. 1b shows a sectional view of the membrane of Fig. 1a
  • FIG. 2a shows a sectional view of a dynamic converter according to a second embodiment
  • Fig. 2b shows a perspective view of the dynamic transducer of Fig. 2a
  • Fig. 2c shows another perspective view of the dynamic one
  • FIG. 3a shows a perspective view of a magnetic ring for a dynamic sound transducer according to a third embodiment
  • Fig. 3b shows an enlarged view of the detail B in Fig. 3a
  • Fig. 4 shows a receiver according to a fourth embodiment.
  • Fig. 1a shows a plan view of a diaphragm system of a dynamic sound transducer according to a first embodiment.
  • the membrane 10 is connected to a voice coil 20 and embedded in a chassis 30.
  • the membrane 10 has on its one side two metallized surfaces 1 1 and an insulating, ie not electrically coated portion 12 between the two metallized surfaces 11.
  • the coil wires 25 of the voice coil 20 are respectively adhesively bonded to one of the metallized surfaces 11 or conductively connected to the metallized surfaces 1 1.
  • two contact elements 15 are provided, which are conductively connected to the two metallized surfaces 11, for example, by gluing.
  • the two electrical contact elements serve to cover the voice coil via the electrically conductive surfaces with an electrical circuit G. which serves, for example, to apply a signal to the voice coil.
  • Fig. 1b shows a sectional view of the membrane system of Fig. 1a.
  • the diaphragm 10 is disposed in the chassis 30 and has a voice coil 20 with a coil wire 25.
  • One side of the membrane preferably the underside, is coated with an electrically conductive layer 11 in a sputtering process, for example.
  • an electrically conductive layer 11 may be prepared, for example, by sputtering AI (several angstroms) and sputtering AU (about 2000 angstroms).
  • sputtering AI severe angstroms
  • sputtering AU about 2000 angstroms
  • the connecting wires 25 of a voice coil 20 are then bent inward, the insulation of the connecting wires of the voice coil are thermally stripped in the vicinity of the coil (at about 380 °) and shortened.
  • the coils 25 may then be placed and secured to the membranes 10 in a conventional manner.
  • the two stripped and shortened connecting wires 25 of the voice coil 20 are electrically conductively connected or glued to one another with the two contact surfaces 11 of the electrically conductive layer.
  • the chassis 30 of the dynamic transducer has two wires 15 on the diaphragm hub, which are connected to a printed circuit board in the dynamic transducer.
  • the membranes 10 are inserted into the chassis 30, and the wires are contacted accordingly.
  • the membrane can be glued or attached to the chassis.
  • a dynamic sound transducer having a nominal resistance which is slightly larger than the nominal resistance of the coil can be obtained.
  • the contact has only a contact resistance of a few ohms.
  • the insulation section 12 may preferably be designed to be smaller than the first and second electrically conductive surfaces 11. This allows easy and locally flexible contacting of the wires 15 since one of the wires 15 can be connected to the first conductive surface at any location, preferably near the outer edge. The other wire is connected to the second conductive surface accordingly.
  • one side of the membrane is provided with a central strip-shaped insulation section 12 and the remaining approximately semicircular surfaces of one side of the membrane are coated with the first and second electrically conductive surfaces. By a very large first and second electrically conductive surface and a low electrical resistance between the wires 15 and the leads 25 can be achieved.
  • Such a dynamic sound transducer may preferably be used in a headphone, a handset or a headset.
  • Fig. 2a shows a sectional view of a dynamic sound transducer according to a second embodiment.
  • the dynamic sound transducer has a chassis 130, a membrane 110 with two beads 110 a, 110 b, a voice coil 120 and a magnet system 140.
  • FIG. 2b shows a perspective schematic view of a dynamic sound transducer according to FIG. 2a.
  • the dynamic transducer has two beads, but no dome, i. in the middle of the membrane, a hole 150 is provided.
  • FIG. 2c shows a further perspective view of a dynamic sound transducer of FIG. 2a.
  • the membrane system has an outer membrane support 111 and an inner membrane support 1 12 and a passage or a hole 150. Between the outer membrane support 111 and the coil seat 122 is a first bead 11Oa and between the coil seat 122 and the inner membrane pad 112, a second bead 11 Ob is provided.
  • the second embodiment thus relates to the idea of reducing or avoiding distortions occurring by increasing the membrane area, wherein an upper limit frequency is maintained. Furthermore, a dynamic sound transducer is provided, which has a reduced resonance frequency, so that such a sound transducer can be used as a broadband converter. To reduce the vibration modes, a higher circumference is provided relative to the calotte converter.
  • the invention thus relates to the idea to provide a dynamic transducer with two beads 110a, 110b, but without dome.
  • the two beads 110a, 110b are fastened inside and outside on the chassis 130 of the dynamic transducer.
  • a coil 120 for driving the membrane is provided at the center 122 between the outer and inner beads 110a, 110b.
  • the membrane 1 10 is rigid, which can be achieved by a corresponding contour of the membrane.
  • the membrane is further extended to the edge regions, i. H. the membrane supports 111, 112, towards softer. Due to the fact that the membrane does not have a uniform rigidity, the size of the sound-radiating surface depends on the frequency.
  • the beads 10a, 110b oscillates homogeneously with the coil 120 and thus represents a large sound-radiating surface.
  • the upper limit frequency of the dynamic sound transducer is set outside the listening area.
  • the dynamic transducer according to a second embodiment has a Ringradiator with a vapor-deposited film (Duofol) in order to reduce the resonance frequency.
  • a broadband converter can be provided, which can be used for example in an open headphone.
  • the membrane of the dynamic transducer can be steamed. Due to the enlarged circumference of the membrane, vibration modes can propagate more poorly. Thus, a uniform amplitude and frequency response can be obtained.
  • Fig. 3a shows a perspective view of a magnetic ring for a dynamic see converter according to a third embodiment.
  • the magnet ring 240 according to FIG. 3 a can be used, for example, in the dynamic sound transducer according to FIG. 2 a or in the magnet system 140 of the dynamic sound transducer of FIG. 2 a.
  • Fig. 3b shows an enlarged portion B of Fig. 3a.
  • the magnetic ring 240 has a substantially U-shaped cross section, wherein no complete magnetic ring, but only magnetic segments 241 are provided in the U-shaped magnetic ring. Thus, 241 air gaps 242 are provided between the magnet segments.
  • the magnet system For venting the air gap of the magnet system, the magnet system is designed annular, with no complete magnetic ring, but only magnetic segments 241 are provided.
  • the resulting air gaps 242 between the individual magnet segments 241 thus allow the air to escape in the region of the magnet system.
  • the otherwise usual compressions of the air cushion in the region of the air gap of the magnet system can be avoided.
  • unwanted acoustic springs can be avoided by the compression of the air cushion.
  • airflows between the various regions of a Membrane system such as between a bead and a Kalotten Scheme or between an inner and an outer bead (such as shown in FIG. 2a to 2c shown) are prevented by the air gap.
  • Fig. 4 shows a schematic sectional view of a headphone according to a fourth embodiment.
  • the headphone has a sound transducer 300, ear pads 400, and a baffle 600.
  • the headset is placed over ear 700 by ear cushions 400.
  • the headphone according to the fourth embodiment has a curved baffle 600.
  • the flat baffle according to the prior art and its corresponding sound transmission serves to control the acoustic path to the outside world and the back of the sound transducer.
  • grids or similar elements are often placed on the back of the transducer. By means of these elements, however, unwanted reflections can arise, which can influence the acoustic reproduction of the sound transducer.
  • the baffle 600 is configured bent and at the same time constitutes an outer wall or casing for the headphone. Thus, no undesirable acoustic effects arise due to an additional protective housing.
  • a reflection-free termination to the outside world can thus be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Headphones And Earphones (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

Disclosed is a dynamic sound transducer comprising a membrane system (10) which has at least one first and second metallized area (11) which are separated from one another by means of an insulating area (12). The dynamic sound transducer further comprises an oscillation coil (20) encompassing a coil wire (25). One end of the coil wire is connected in an electrically conducting manner to the first metallized area (11) while the other end thereof is connected in an electrically conducting manner to the second metallized area (11).

Description

Dynamischer Schallwandler und Hörer Dynamic sound transducer and handset
Die vorliegende Erfindung betrifft einen dynamischen Schallwandler und einen Hörer.The present invention relates to a dynamic sound transducer and a listener.
Bei herkömmlichen dynamischen Schallwandlern wird eine Schwingspule im Bereich der Membransicke vorgesehen, wobei Spulendrähte zur Kontaktierung der Schwingspule verwendet werden. Die Spulendrähte verbinden somit den Membranrand und die Schwingspule. Das Vorsehen derartiger Spulendrähte ist jedoch bei der Herstellung von dynamischen Schallwandlern fertigungstechnisch sehr aufwändig und kann zum Ausschuss der Schallwandler führen, beispielsweise wenn Klirrer oder Spulendrahtabrisse vorhanden sind. Da die Spulendräh- te typischerweise lediglich auf einer Seite der Membran verlegt werden, kann eine asymmetrische mechanische Kraft auf die Schwingspule ausgeübt werden, so dass ein unerwünschtes Taumeln der Membran vorhanden sein kann.In conventional dynamic sound transducers, a voice coil is provided in the region of the diaphragm bead, with coil wires being used to contact the voice coil. The coil wires thus connect the diaphragm edge and the voice coil. The provision of such coil wires, however, in the production of dynamic transducers manufacturing technology very complex and can lead to rejects of the sound transducer, for example, when clutter or coil wire tears are present. Since the coil wires are typically laid only on one side of the membrane, an asymmetric mechanical force can be exerted on the voice coil, so that an undesired tumbling of the membrane may be present.
US 2004/0141629 A1 zeigt einen dynamischen Schallwandler mit einer Membran, wobei im Bereich der Membransicke eine Schwingspule angeordnet ist. Am Rand der Membran sind zwei Elektroden vorgesehen, welche mit der Schwingspule verbunden sind. Die Verbindungsabschnitte zwischen den Elektroden und der Schwingspule werden mit einer elektrisch leitfähigen Polymerschicht beschichtet.US 2004/0141629 A1 shows a dynamic sound transducer with a membrane, wherein a voice coil is arranged in the region of the membrane bead. At the Edge of the membrane, two electrodes are provided, which are connected to the voice coil. The connecting portions between the electrodes and the voice coil are coated with an electrically conductive polymer layer.
Dynamische Schallwandler weisen ferner typischerweise eine Membran mit einer Sicke und einer Kalotte auf. Dabei hängt die obere Grenzfrequenz eines derartigen dynamischen Schallwandlers von der Größe der Fläche ab, welche Schall abstrahlt. Je größer die schallabstrahlende Fläche, desto tiefer liegen die obere Grenzfrequenz des Frequenzgangs. Wenn die schallabstrahlende Fläche ver- größert wird, kann ein Audiosignal mit einer reduzierten Verzerrung wiedergegeben werden.Dynamic transducers also typically include a diaphragm having a crimp and a dome. In this case, the upper limit frequency of such a dynamic sound transducer depends on the size of the surface which emits sound. The larger the sound-radiating surface, the lower the upper limit frequency of the frequency response. When the sound emitting area is enlarged, an audio signal with a reduced distortion can be reproduced.
Als dynamische Schallwandler sind im Lautsprecherbereich Ringradiatoren bekannt, welche eine Resonanzfrequenz im kHz Bereich aufweisen.As dynamic transducers ring radiators are known in the speaker area, which have a resonant frequency in the kHz range.
Es ist somit eine Aufgabe der vorliegenden Erfindung, einen dynamischen Schallwandler vorzusehen, welcher eine verbesserte Wiedergabe ermöglicht.It is thus an object of the present invention to provide a dynamic sound transducer which enables improved reproduction.
Diese Aufgabe wird durch einen dynamischen Schallwandler gemäß Anspruch 1 und durch einen Hörer gemäß Anspruch 9 gelöst.This object is achieved by a dynamic sound transducer according to claim 1 and by a receiver according to claim 9.
Somit wird ein dynamischer Schallwandler mit einem Membransystem vorgesehen, welches mindestens eine erste und zweite metallisierte Fläche aufweist, welche durch eine Isolationsfläche von einander getrennt sind. Der dynamische Schallwandler weist ferner eine Schwingspule mit einem Spulendraht auf. Ein Ende des Spulendrahtes ist mit der ersten metallisierten Fläche, und das andere Ende des Spulendrahtes ist mit der zweiten metallisierten Fläche elektrisch leitend verbunden.Thus, a dynamic transducer is provided with a membrane system having at least a first and second metallized surface, which are separated by an insulating surface of each other. The dynamic transducer further comprises a voice coil with a coil wire. One end of the coil wire is connected to the first metallized surface, and the other end of the coil wire is electrically connected to the second metallized surface.
Gemäß einem Aspekt der vorliegenden Erfindung wird das Membransystem in einem Chassis angeordnet. Mindestens zwei Kontaktelemente sind an dem Chassis derart angeordnet, dass das erste Kontaktelement elektrisch leitend mit der ersten metallisierten Fläche verbunden ist und das zweite Kontaktelement elektrisch leitend mit der zweiten metallisierten Fläche verbunden ist.According to one aspect of the present invention, the membrane system is arranged in a chassis. At least two contact elements are arranged on the chassis such that the first contact element with electrically conductive the first metallized surface is connected and the second contact element is electrically conductively connected to the second metallized surface.
Die vorliegende Erfindung betrifft ebenfalls einen Schallwandler mit einem Memb- ransystem, welches eine erste und zweite Sicke sowie eine Schwingspule auf- weist, welche in dem Berech zwischen der ersten und zweiten Sicke angeordnet ist.The present invention also relates to a sound transducer with a membrane system, which has a first and second bead and a voice coil, which is arranged in the region between the first and second bead.
Die Erfindung betrifft ebenfalls einen dynamischen Schallwandler mit einer Membran, einer Schwingspule, und einem Magnetsystem. Das Magnetsystem weist dabei einen Magnetring aus einer Vielzahl von Magnetsegmenten auf.The invention also relates to a dynamic sound transducer with a diaphragm, a voice coil, and a magnet system. The magnet system in this case has a magnetic ring made of a plurality of magnet segments.
Die Erfindung betrifft ferner einen Hörer mit einem Schallwandler und einer gebogenen Schallwand.The invention further relates to a receiver with a sound transducer and a curved baffle.
Die Erfindung betrifft den Gedanken, einen dynamischen Schallwandler mit einer Membran vorzusehen, welche (halbseitig) mit einer leitenden Beschichtung beschichtet ist. Die Mitte der Membran kann dabei einen Isolierstreifen aufweisen, welcher keine leitfähige Beschichtung aufweist. So kann die Fläche der leitenden Beschichtung in zwei voneinander isolierte Abschnitte eingeteilt werden. Die Spulendrähte der Spule können dabei kurz abgeschnitten und in einer unmittelbaren Nähe zur Spule elektrisch leitend an der Membran befestigt bzw. geklebt werden, so dass eine elektrische Verbindung mit dem Membranrand über die leitfähige Schicht der Membran vorgesehen wird. Das Chassis des dynamischen Wandlers kann zwei Leitbahnen aufweisen, wobei die Membran mit der leitfähigen Beschichtung in bzw. an das Chassis eingeklebt bzw. befestigt wird, so dass die leitfähige Beschichtung der Membran einen leitfähigen Kontakt mit dem Chassis aufweist.The invention relates to the idea of providing a dynamic sound transducer with a membrane which is (half-sidedly) coated with a conductive coating. The center of the membrane can have an insulating strip, which has no conductive coating. Thus, the surface of the conductive coating can be divided into two mutually insulated sections. The coil wires of the coil can be cut short and be attached or glued in an immediate proximity to the coil electrically conductive to the membrane, so that an electrical connection with the membrane edge on the conductive layer of the membrane is provided. The chassis of the dynamic transducer may have two conductive lines, with the membrane having the conductive coating glued to the chassis so that the conductive coating of the membrane has a conductive contact with the chassis.
Da keine bewegten Spulendrähte zwischen der Spule und dem Membranrand mehr vorgesehen sind, können die oben angeführten Probleme nicht auftreten.Since there are no longer any moving coil wires between the coil and the edge of the membrane, the above-mentioned problems can not occur.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. - A -Further embodiments of the invention are the subject of the dependent claims. - A -
Ausführungsbeispiele und Vorteile der Erfindung werden nachstehend unter Bezugnahme auf die Zeichnung näher erläutert.Embodiments and advantages of the invention are explained below with reference to the drawing.
Fig. 1a zeigt eine schematische Draufsicht auf eine Membran gemäß einem ersten Ausführungsbeispiel, Fig. 1 b zeigt eine Schnittansicht der Membran von Fig. 1a,1a shows a schematic plan view of a membrane according to a first embodiment, Fig. 1b shows a sectional view of the membrane of Fig. 1a,
Fig. 2a zeigt eine Schnittansicht eines dynamischen Wandlers gemäß einem zweiten Ausführungsbeispiel,2a shows a sectional view of a dynamic converter according to a second embodiment,
Fig. 2b zeigt eine perspektivische Ansicht des dynamischen Wandlers von Fig. 2a, Fig. 2c zeigt eine weitere perspektivische Ansicht des dynamischenFig. 2b shows a perspective view of the dynamic transducer of Fig. 2a; Fig. 2c shows another perspective view of the dynamic one
Wandlers von Fig. 2a,Converter of Fig. 2a,
Fig. 3a zeigt eine perspektivische Ansicht eines Magnetringes für einen dynamischen Schallwandler gemäß einem dritten Ausführungsbeispiel, Fig. 3b zeigt eine vergrößerte Darstellung des Ausschnitts B in Fig. 3a, und3a shows a perspective view of a magnetic ring for a dynamic sound transducer according to a third embodiment, Fig. 3b shows an enlarged view of the detail B in Fig. 3a, and
Fig. 4 zeigt einen Hörer gemäß einem vierten Ausführungsbeispiel.Fig. 4 shows a receiver according to a fourth embodiment.
Fig. 1a zeigt eine Draufsicht auf ein Membransystem eines dynamischen Schallwandlers gemäß einem ersten Ausführungsbeispiel. Die Membran 10 ist mit einer Schwingspule 20 verbunden und in einem Chassis 30 eingebettet. Die Membran 10 weist auf ihrer einen Seite zwei metallisierte Flächen 1 1 sowie einen isolierenden, d. h. nicht elektrisch beschichteten Abschnitt 12 zwischen den beiden metallisierten Flächen 11 auf. Die Spulendrähte 25 der Schwingspule 20 sind jeweils auf eine der metallisierten Flächen 11 leitend aufgeklebt bzw. leitend mit den metallisierten Flächen 1 1 verbunden. Am Rande der Membran 10 bzw. am Chassis 30 sind zwei Kontaktelemente 15 vorgesehen, welche leitend mit den beiden metallisierten Flächen 11 jeweils beispielsweise durch Kleben verbunden sind. Die beiden elektrischen Kontaktelemente dienen dazu, die Schwingspule über die elektrisch leitenden Flächen mit einer elektrischen Schaltung G zu kop- peln, welche beispielsweise dazu dient, die Schwingspule mit einem Signal zu beaufschlagen.Fig. 1a shows a plan view of a diaphragm system of a dynamic sound transducer according to a first embodiment. The membrane 10 is connected to a voice coil 20 and embedded in a chassis 30. The membrane 10 has on its one side two metallized surfaces 1 1 and an insulating, ie not electrically coated portion 12 between the two metallized surfaces 11. The coil wires 25 of the voice coil 20 are respectively adhesively bonded to one of the metallized surfaces 11 or conductively connected to the metallized surfaces 1 1. At the edge of the membrane 10 or on the chassis 30, two contact elements 15 are provided, which are conductively connected to the two metallized surfaces 11, for example, by gluing. The two electrical contact elements serve to cover the voice coil via the electrically conductive surfaces with an electrical circuit G. which serves, for example, to apply a signal to the voice coil.
Fig. 1b zeigt eine Schnittansicht des Membransystems von Fig. 1a. Die Membran 10 ist in dem Chassis 30 angeordnet und weist eine Schwingspule 20 mit einem Spulendraht 25 auf.Fig. 1b shows a sectional view of the membrane system of Fig. 1a. The diaphragm 10 is disposed in the chassis 30 and has a voice coil 20 with a coil wire 25.
Nachfolgend wird ein beispielhaftes Verfahren zur Herstellung eines oben angeführten dynamischen Schallwandlers detailliert beschrieben.Hereinafter, an exemplary method for manufacturing a dynamic transducer mentioned above will be described in detail.
Eine Seite der Membran, vorzugsweise die Unterseite, wird beispielsweise in einem Sputterprozess mit einer elektrisch leitfähigen Schicht 11 beschichtet. Um einen Isolierabschnitt 12 vorzusehen, kann ein Teil der Membran während des Sputterprozesses abgedeckt werden. Die leitfähige Schicht 11 kann beispielsweise durch Sputtem von AI (einige Angström) und durch Sputtem von AU (ca. 2000 Angström) hergestellt werden. Somit werden zwei elektrische Kontaktflächen 1 1 vorgesehen, welche durch den Isolierabschnitt 12 voneinander getrennt bzw. isoliert sind. Diese elektrischen Kontaktflächen 11 dienen dazu, den Membransitz und den Spulensitz elektrisch leitend miteinander zu verbinden. Die Anschlussdrähte 25 einer Schwingspule 20 werden anschließend nach innen gebogen, die Isolierung der Anschlussdrähte der Schwingspule werden thermisch im Nahbereich der Spule abisoliert (bei ca. 380°) und gekürzt. Die Spulen 25 können anschließend auf herkömmliche Art und Weise auf die Membranen 10 aufgesetzt und befestigt werden. Die beiden abisolierten und gekürzten Anschlussdrähte 25 der Schwingspule 20 werden mit den beiden Kontaktflächen 11 der elektrisch leitenden Schicht elektrisch leitend miteinander verbunden bzw. aufgeklebt. Das Chassis 30 des dynamischen Schallwandlers weist an dem Membranansitz zwei Drähte 15 auf, die mit einer Leiterplatte in dem dynamischen Schallwandler verbunden sind. Die Membranen 10 werden in das Chassis 30 eingelegt, und die Drähte werden entsprechend kontaktiert. Die Membran kann in das Chassis eingeklebt bzw. daran befestigt werden. Somit kann ein dynamischer Schallwandler erhalten werden, welcher einen Nennwiderstand aufweist, welcher geringfügig größer als der Nennwiderstand der Spule ist. Vorzugsweise weist die Kontaktierung lediglich einen Übergangswiderstand von einigen wenigen Ohm auf. Der Isolationsabschnitt 12 kann vor- zugsweise kleiner als die erste und zweite elektrisch leitfähige Fläche 11 ausgestaltet sein. Dies erlaubt ein einfaches und örtlich flexibles Kontaktieren der Drähte 15, da einer der Drähte 15 an einer beliebigen Stelle, vorzugsweise in der Nähe des äußeren Randes, mit der ersten leitfähigen Fläche verbunden werden kann. Der andere Draht wird entsprechend mit der zweiten leitfähigen Fläche verbun- den. Vorzugsweise wird eine Seite der Membran mit einem mittigen streifenförmigen Isolationsabschnitt 12 ausgestattet und die verbleibenden näherungsweise halbkreisförmigen Flächen einer Seite der Membran werden mit der ersten und zweiten elektrisch leitfähigen Fläche beschichtet. Durch eine möglichst große erste und zweite elektrisch leitfähige Fläche kann auch ein geringer elektrischer Widerstand zwischen den Drähten 15 und den Anschlussdrähten 25 erreicht werden. Ein derartiger dynamischer Schallwandler kann vorzugsweise in einem Kopfhörer, einem Hörer oder einer Hör-Sprech-Garnitur verwendet werden.One side of the membrane, preferably the underside, is coated with an electrically conductive layer 11 in a sputtering process, for example. To provide an insulating portion 12, a portion of the membrane may be covered during the sputtering process. The conductive layer 11 may be prepared, for example, by sputtering AI (several angstroms) and sputtering AU (about 2000 angstroms). Thus, two electrical contact surfaces 1 1 are provided, which are separated or isolated from each other by the insulating portion 12. These electrical contact surfaces 11 serve to electrically connect the membrane seat and the coil seat with each other. The connecting wires 25 of a voice coil 20 are then bent inward, the insulation of the connecting wires of the voice coil are thermally stripped in the vicinity of the coil (at about 380 °) and shortened. The coils 25 may then be placed and secured to the membranes 10 in a conventional manner. The two stripped and shortened connecting wires 25 of the voice coil 20 are electrically conductively connected or glued to one another with the two contact surfaces 11 of the electrically conductive layer. The chassis 30 of the dynamic transducer has two wires 15 on the diaphragm hub, which are connected to a printed circuit board in the dynamic transducer. The membranes 10 are inserted into the chassis 30, and the wires are contacted accordingly. The membrane can be glued or attached to the chassis. Thus, a dynamic sound transducer having a nominal resistance which is slightly larger than the nominal resistance of the coil can be obtained. Preferably, the contact has only a contact resistance of a few ohms. The insulation section 12 may preferably be designed to be smaller than the first and second electrically conductive surfaces 11. This allows easy and locally flexible contacting of the wires 15 since one of the wires 15 can be connected to the first conductive surface at any location, preferably near the outer edge. The other wire is connected to the second conductive surface accordingly. Preferably, one side of the membrane is provided with a central strip-shaped insulation section 12 and the remaining approximately semicircular surfaces of one side of the membrane are coated with the first and second electrically conductive surfaces. By a very large first and second electrically conductive surface and a low electrical resistance between the wires 15 and the leads 25 can be achieved. Such a dynamic sound transducer may preferably be used in a headphone, a handset or a headset.
Fig. 2a zeigt eine Schnittansicht eines dynamischen Schallwandlers gemäß einem zweiten Ausführungsbeispiel. Der dynamische Schallwandler weist ein Chassis 130, eine Membran 110 mit zwei Sicken 110a, 110b, eine Schwingspule 120 sowie ein Magnetsystem 140 auf.Fig. 2a shows a sectional view of a dynamic sound transducer according to a second embodiment. The dynamic sound transducer has a chassis 130, a membrane 110 with two beads 110 a, 110 b, a voice coil 120 and a magnet system 140.
Fig. 2b zeigt eine perspektivische schematische Ansicht eines dynamischen Schallwandlers gemäß Fig. 2a. Der dynamische Schallwandler weist dabei zwei Sicken, jedoch keine Kalotte auf, d.h. in der Mitte der Membran ist ein Loch 150 vorgesehen.FIG. 2b shows a perspective schematic view of a dynamic sound transducer according to FIG. 2a. The dynamic transducer has two beads, but no dome, i. in the middle of the membrane, a hole 150 is provided.
Fig. 2c zeigt eine weitere perspektivische Ansicht eines dynamischen Schallwandlers von Fig. 2a. Insbesondere ist hierbei das entsprechende Membransystem gezeigt. Das Membransystem weist eine äußere Membranauflage 111 und eine innere Membranauflage 1 12 sowie einen Durchgang bzw. ein Loch 150 auf. Zwischen der äußeren Membranauflage 111 und dem Spulensitz 122 ist eine erste Sicke 11Oa und zwischen dem Spulensitz 122 und der inneren Membranauflage 112 ist eine zweite Sicke 11 Ob vorgesehen.FIG. 2c shows a further perspective view of a dynamic sound transducer of FIG. 2a. In particular, the corresponding membrane system is shown here. The membrane system has an outer membrane support 111 and an inner membrane support 1 12 and a passage or a hole 150. Between the outer membrane support 111 and the coil seat 122 is a first bead 11Oa and between the coil seat 122 and the inner membrane pad 112, a second bead 11 Ob is provided.
Das zweite Ausführungsbeispiel betrifft somit den Gedanken, auftretende Verzerrungen zu reduzieren bzw. zu vermeiden, indem die Membranfläche erhöht wird, wobei eine obere Grenzfrequenz aufrecht erhalten wird. Ferner wird ein dynamischer Schallwandler vorgesehen, welcher eine reduzierte Resonanzfrequenz aufweist, so dass ein derartiger Schallwandler als Breitbandwandler verwendet werden kann. Zur Reduktion der Schwingungsmoden wird ein höherer Umfang relativ zu dem Kalottenwandler vorgesehen.The second embodiment thus relates to the idea of reducing or avoiding distortions occurring by increasing the membrane area, wherein an upper limit frequency is maintained. Furthermore, a dynamic sound transducer is provided, which has a reduced resonance frequency, so that such a sound transducer can be used as a broadband converter. To reduce the vibration modes, a higher circumference is provided relative to the calotte converter.
Die Erfindung betrifft somit den Gedanken, einen dynamischen Schallwandler mit zwei Sicken 110a, 110b, jedoch ohne Kalotte vorzusehen. Die beiden Sicken 110a, 1 10b werden dabei innen und außen am Chassis 130 des dynamischen Wandlers befestigt. Eine Spule 120 zum Antrieb der Membran wird in der Mitte 122 zwischen der äußeren und inneren Sicke 110a, 110b vorgesehen. In dem Bereich der Membran, wo die Spule angeordnet ist, d. h. am Spulensitz 122, ist die Membran 1 10 steif ausgeführt, was durch eine entsprechende Kontur der Membran erreicht werden kann. Die Membran wird ferner zu den Randbereichen, d. h. den Membranauflagen 111 , 112, hin weicher. Dadurch, dass die Membran keine einheitliche Steifigkeit aufweist, hängt die Größe der schallabstrahlenden Fläche von der Frequenz ab. Bei tiefen Frequenzen schwingt ein großer Teil der Sicken 1 10a, 1 10b homogen mit der Spule 120 und stellt somit eine große schallabstrahlende Fläche dar. Wenn die Frequenz jedoch erhöht wird, schwingt lediglich ein Nahbereich des Spulensitzes 122, so dass die schallabstrahlende Fläche reduziert wird. Somit können hohe Frequenzanteile entsprechend abge- strahlt werden. Die obere Grenzfrequenz des dynamischen Schallwandlers wird dabei außerhalb des Hörbereichs eingestellt.The invention thus relates to the idea to provide a dynamic transducer with two beads 110a, 110b, but without dome. The two beads 110a, 110b are fastened inside and outside on the chassis 130 of the dynamic transducer. A coil 120 for driving the membrane is provided at the center 122 between the outer and inner beads 110a, 110b. In the region of the membrane where the coil is arranged, d. H. at the coil seat 122, the membrane 1 10 is rigid, which can be achieved by a corresponding contour of the membrane. The membrane is further extended to the edge regions, i. H. the membrane supports 111, 112, towards softer. Due to the fact that the membrane does not have a uniform rigidity, the size of the sound-radiating surface depends on the frequency. At low frequencies, a large part of the beads 10a, 110b oscillates homogeneously with the coil 120 and thus represents a large sound-radiating surface. However, when the frequency is increased, only a near zone of the coil seat 122 oscillates, so that the sound-radiating surface is reduced , Thus, high frequency components can be emitted accordingly. The upper limit frequency of the dynamic sound transducer is set outside the listening area.
Wenn die aktive schallabstrahlende Fläche des dynamischen Schallwandlers vergrößert wird, werden geringere Hübe zur Erzeugung der Schallsignale ermöglicht, was Verzerrungen reduzieren kann. Der dynamische Schallwandler gemäß einem zweiten Ausführungsbeispiel weist einen Ringradiator mit einer bedampften Folie (Duofol) auf, um die Resonanzfrequenz zu reduzieren. Somit kann ein Breitbandwandler vorgesehen werden, welcher beispielsweise in einem offenen Kopfhörer verwendet werden kann.As the active sound radiating surface of the dynamic transducer is increased, lower strokes are allowed to produce the sound signals, which can reduce distortion. The dynamic transducer according to a second embodiment has a Ringradiator with a vapor-deposited film (Duofol) in order to reduce the resonance frequency. Thus, a broadband converter can be provided, which can be used for example in an open headphone.
Die Membran des dynamischen Schallwandlers kann bedampft werden. Durch den vergrößerten Umfang der Membran können Schwingungsmoden sich schlechter ausbreiten. Somit kann ein gleichmäßiger Amplituden- und Frequenzgang erhalten werden.The membrane of the dynamic transducer can be steamed. Due to the enlarged circumference of the membrane, vibration modes can propagate more poorly. Thus, a uniform amplitude and frequency response can be obtained.
Fig. 3a zeigt eine perspektivische Ansicht eines Magnetringes für einen dynami- sehen Wandler gemäß einem dritten Ausführungsbeispiel. Der Magnetring 240 gemäß Fig. 3a kann beispielsweise in dem dynamischen Schallwandler gemäß Fig. 2a bzw. in dem Magnetsystem 140 des dynamischen Schallwandlers von Fig. 2a verwendet werden.Fig. 3a shows a perspective view of a magnetic ring for a dynamic see converter according to a third embodiment. The magnet ring 240 according to FIG. 3 a can be used, for example, in the dynamic sound transducer according to FIG. 2 a or in the magnet system 140 of the dynamic sound transducer of FIG. 2 a.
Fig. 3b zeigt einen vergrößerten Abschnitt B von Fig. 3a. Der Magnetring 240 weist einen im Wesentlichen U-förmigen Querschnitt auf, wobei kein kompletter Magnetring, sondern lediglich Magnetsegmente 241 in dem U-förmigen Magnetring vorgesehen werden. Somit sind zwischen den Magnetsegmenten 241 Luftspalte 242 vorgesehen.Fig. 3b shows an enlarged portion B of Fig. 3a. The magnetic ring 240 has a substantially U-shaped cross section, wherein no complete magnetic ring, but only magnetic segments 241 are provided in the U-shaped magnetic ring. Thus, 241 air gaps 242 are provided between the magnet segments.
Zur Entlüftung des Luftspaltes des Magnetsystems wird das Magnetsystem ring- förmig ausgestaltet, wobei kein kompletter Magnetring, sondern lediglich Magnetsegmente 241 vorgesehen werden. Die hierbei entstehenden Luftspalte 242 zwischen den einzelnen Magnetsegmenten 241 ermöglichen somit ein Entweichen der Luft im Bereich des Magnetsystems. Die Luft entweicht dabei insbesondere zur Innenseite des Magnetsystems, wenn die Tauchspule starke Bewegun- gen ausführt. Damit können die ansonsten üblichen Kompressionen des Luftpolsters im Bereich des Luftspaltes des Magnetsystems vermieden werden. Somit können insbesondere ungewollte akustische Federn durch die Kompression des Luftpolsters vermieden werden. Ferner können durch das Vorsehen der Magnetsegmente 241 Luftströmungen zwischen den verschiedenen Bereichen eines Membransystems wie beispielsweise zwischen einem Sicken- und einem Kalottenbereich oder zwischen einer inneren und einer äußeren Sicke (wie beispielsweise gemäß Fig. 2a bis 2c gezeigt) durch den Luftspalt verhindert werden.For venting the air gap of the magnet system, the magnet system is designed annular, with no complete magnetic ring, but only magnetic segments 241 are provided. The resulting air gaps 242 between the individual magnet segments 241 thus allow the air to escape in the region of the magnet system. The air escapes in particular to the inside of the magnet system when the plunger coil makes strong movements. Thus, the otherwise usual compressions of the air cushion in the region of the air gap of the magnet system can be avoided. Thus, in particular unwanted acoustic springs can be avoided by the compression of the air cushion. Furthermore, by providing the magnet segments 241, airflows between the various regions of a Membrane system such as between a bead and a Kalottenbereich or between an inner and an outer bead (such as shown in FIG. 2a to 2c shown) are prevented by the air gap.
Fig. 4 zeigt eine schematische Schnittansicht eines Kopfhörers gemäß einem vierten Ausführungsbeispiel. Der Kopfhörer weist einen Schallwandler 300, Ohrpolster 400 und eine Schallwand 600 auf. Bei Betrieb wird der Kopfhörer mittels der Ohrpolster 400 über ein Ohr 700 platziert.Fig. 4 shows a schematic sectional view of a headphone according to a fourth embodiment. The headphone has a sound transducer 300, ear pads 400, and a baffle 600. In operation, the headset is placed over ear 700 by ear cushions 400.
Während herkömmliche Schallwandler von Kopfhörern typischerweise in eine bzw. an eine ebene Schallwand eingebettet werden, weist der Kopfhörer gemäß dem vierten Ausführungsbeispiel eine gebogene Schallwand 600 auf.Whereas conventional sound transducers of headphones are typically embedded in a flat baffle, the headphone according to the fourth embodiment has a curved baffle 600.
Die ebene Schallwand gemäß dem Stand der Technik sowie seinen entsprechende Schalldurchlässigkeit dient dazu, den akustischen Weg zur Außenwelt sowie zur Rückseite des Schallwandlers zu steuern. Zum Schutz des Wandlers werden oftmals Gitter oder ähnliche Elemente auf der Rückseite des Schallwand- lers angeordnet. Durch diese Elemente können jedoch unerwünschte Reflektio- nen entstehen, welche die akustische Wiedergabe des Schallwandlers beeinflussen können.The flat baffle according to the prior art and its corresponding sound transmission serves to control the acoustic path to the outside world and the back of the sound transducer. To protect the transducer, grids or similar elements are often placed on the back of the transducer. By means of these elements, however, unwanted reflections can arise, which can influence the acoustic reproduction of the sound transducer.
Gemäß dem vierten Ausführungsbeispiel wird die Schallwand 600 gebogen ausgestaltet und stellt gleichzeitig eine äußere Wand bzw. Hülle für den Kopfhö- rer dar. Somit entstehen keine unerwünschten akustischen Effekte durch ein zusätzliches Schutzgehäuse. Mittels der gebogenen Schallwand 600 kann somit ein reflektionsfreier Abschluss zur Außenwelt hin erreicht werden. According to the fourth embodiment, the baffle 600 is configured bent and at the same time constitutes an outer wall or casing for the headphone. Thus, no undesirable acoustic effects arise due to an additional protective housing. By means of the curved baffle 600, a reflection-free termination to the outside world can thus be achieved.

Claims

Ansprüche claims
1. Dynamischer Schallwandler, mit einem Membransystem (10) mit einer Membran mit einer ersten Seite und einer zweiten Seite, welches mindestens eine erste und zweite elektrisch leitfähi- ge Fläche (11 ) aufweist, welche durch einen Isolationsabschnitt (12) voneinander getrennt sind, und einer Schwingspule (20) mit einem Spulendraht (25), wobei ein Ende des Spulendrahtes mit der ersten elektrisch leitfähigen Fläche (11 ) und das andere Ende des Spulendrahtes mit der zweiten elektrisch leitfähigen Fläche (1 1 ) elekt- risch leitend verbunden ist.A dynamic sound transducer comprising a diaphragm system (10) having a diaphragm having a first side and a second side having at least first and second electrically conductive surfaces (11) separated by an isolation section (12), and a voice coil (20) having a coil wire (25), wherein one end of the coil wire to the first electrically conductive surface (11) and the other end of the coil wire with the second electrically conductive surface (1 1) is electrically conductively connected.
2. Dynamischer Schallwandler nach Anspruch 1 , wobei der Isolationsabschnitt (12) kleiner ist als die erste und zweite elektrisch leitfähige Fläche.2. Dynamic transducer according to claim 1, wherein the insulating portion (12) is smaller than the first and second electrically conductive surface.
3. Dynamischer Schallwandler nach Anspruch 1 oder 2, wobei das Membransystem (10) in einem Chassis (30) angeordnet ist, wobei min- destens ein erstes und zweites Kontaktelement (15) an dem Chassis derart (30) angeordnet ist, dass das erste Kontaktelement elektrisch leitend mit der ersten elektrisch leitfähigen Fläche (1 1 ) verbunden ist und das zweite Kontaktelement (15) elektrisch leitend mit der zweiten elektrisch leitfähigen Fläche (11 ) verbunden ist.3. Dynamic transducer according to claim 1 or 2, wherein the membrane system (10) in a chassis (30) is arranged, wherein at least one first and second contact element (15) on the chassis such (30) is arranged that the first Contact element is electrically conductively connected to the first electrically conductive surface (1 1) and the second contact element (15) is electrically conductively connected to the second electrically conductive surface (11).
4. Dynamischer Schallwandler, insbesondere nach einem der Ansprüche 1 , 2 oder 3, mit einem Membransystem, welches eine erste und zweite Sicke (110a, 110b) aufweist, und einer Schwingspule (120), welche in dem Bereich zwischen der ersten und zweiten Sicke (110a, 11 Ob) angeordnet ist.4. Dynamic sound transducer, in particular according to one of claims 1, 2 or 3, with a membrane system, which has a first and second bead (110a, 110b), and a voice coil (120), which in the region between the first and second bead (110a, 11b).
5. Dynamischer Schallwandler nach Anspruch 4, mit einem Loch (150) in der Mitte des Membransystems. 5. Dynamic transducer according to claim 4, with a hole (150) in the middle of the membrane system.
6. Dynamischer Schallwandler nach Anspruch 4 oder 5, wobei die Membran (110) im Bereich zwischen der ersten und zweiten Sicke (110a, 110b) steifer als im Bereich der inneren und äußeren Membranauflage (112, 111 ) ausgestaltet ist.6. Dynamic transducer according to claim 4 or 5, wherein the membrane (110) in the region between the first and second bead (110a, 110b) stiffer than in the region of the inner and outer membrane pad (112, 111) is configured.
7. Dynamischer Schallwandler, insbesondere nach einem der Ansprüche 1 bis 6, mit einer Membran (10, 1 10), einer Schwingspule (20, 120), und einem Magnetsystem (140), wobei das Magnetsystem einen Magnetring (240) aus einer Vielzahl von7. Dynamic sound transducer, in particular according to one of claims 1 to 6, with a diaphragm (10, 1 10), a voice coil (20, 120), and a magnet system (140), wherein the magnet system comprises a magnetic ring (240) of a plurality from
Magnetsegmenten (241 ) aufweist.Magnetic segments (241).
8. Dynamischer Schallwandler nach Anspruch 7, wobei zwischen den Magnetsegmenten (241) mindestens ein Luftspalt (242) vorhanden ist.8. Dynamic transducer according to claim 7, wherein between the magnet segments (241) at least one air gap (242) is present.
9. Hörer, mit einem Schallwandler (300), insbesondere nach einem der Ansprüche 1 bis9. receiver, with a sound transducer (300), in particular according to one of claims 1 to
8, und einer gebogenen Schallwand (600).8, and a curved baffle (600).
10. Hörer nach Anspruch 9, wobei der Schallwandler (300) an bzw. in der Schallwand (600) angeordnet ist.10. A handset according to claim 9, wherein the sound transducer (300) is arranged on or in the baffle (600).
11. Hörer nach einem der Ansprüche 8 oder 9, wobei die Schallwand (600) als äußere Hülle des Gehäuses des Hörers ausgestaltet ist.11. A handset according to any one of claims 8 or 9, wherein the baffle (600) is designed as an outer shell of the housing of the listener.
12. Hörer, mit einem dynamischen Schallwandler nach einem der Ansprüche 1 bis 8.12. earphone, with a dynamic sound transducer according to one of claims 1 to 8.
13. Hör-Sprech-Garnitur, mit einem dynamischen Schallwandler nach einem der Ansprüche 1 bis 8. 13. Hör-Sprech-set, with a dynamic transducer according to one of claims 1 to 8.
EP08715665.9A 2007-01-31 2008-01-30 Dynamic sound transducer, and receiver Active EP2163120B1 (en)

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US20100183173A1 (en) 2010-07-22
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