EP2163120A2 - Transducteur acoustique dynamique et écouteur - Google Patents

Transducteur acoustique dynamique et écouteur

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)
English (en)
Other versions
EP2163120B1 (fr
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/fr
Application granted granted Critical
Publication of EP2163120B1 publication Critical patent/EP2163120B1/fr
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

L'invention concerne un transducteur acoustique dynamique doté d'une membrane (10) présentant au moins une première et une deuxième surface métallisée (11) séparées l'une de l'autre par une surface isolante (12). Le transducteur acoustique dynamique comporte également une bobine mobile (20) constituée d'un fil (25), dont une extrémité est reliée de manière électroconductrice à la première surface métallisée (11) et dont l'autre extrémité est reliée de manière électroconductrice à la deuxième surface métallisée (11).
EP08715665.9A 2007-01-31 2008-01-30 Transducteur acoustique dynamique et écouteur Active EP2163120B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007005620A DE102007005620B4 (de) 2007-01-31 2007-01-31 Dynamischer Schallwandler, Hörer und Hör-Sprech-Garnitur
PCT/EP2008/000692 WO2008092645A2 (fr) 2007-01-31 2008-01-30 Transducteur acoustique dynamique et écouteur

Publications (2)

Publication Number Publication Date
EP2163120A2 true EP2163120A2 (fr) 2010-03-17
EP2163120B1 EP2163120B1 (fr) 2017-04-05

Family

ID=39544973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08715665.9A Active EP2163120B1 (fr) 2007-01-31 2008-01-30 Transducteur acoustique dynamique et écouteur

Country Status (4)

Country Link
US (1) US8731231B2 (fr)
EP (1) EP2163120B1 (fr)
DE (1) DE102007005620B4 (fr)
WO (1) WO2008092645A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5082764B2 (ja) * 2007-10-25 2012-11-28 ソニー株式会社 イヤパッド及びヘッドホン装置
DE102008024816B4 (de) * 2008-05-23 2015-07-16 Sennheiser Electronic Gmbh & Co. Kg Dynamischer elektro-akustischer Wandler und Hörer
DE102012214263B4 (de) * 2012-08-10 2019-01-24 Sennheiser Electronic Gmbh & Co. Kg Dynamischer elektroakustischer Wandler
TWI492641B (zh) * 2012-11-13 2015-07-11 Cotron Corp 振動元件
GB201321325D0 (en) * 2013-12-03 2014-01-15 Ecole Polytechnique F D Rale De Lausanne A sound diffusion system for directional sound enhancement
TWI477159B (zh) 2014-05-27 2015-03-11 Cotron Corp 振動元件
DE102015120637A1 (de) * 2015-11-27 2017-06-14 Sennheiser Electronic Gmbh & Co. Kg Elektrodynamischer Schallwandler
US10321235B2 (en) * 2016-09-23 2019-06-11 Apple Inc. Transducer having a conductive suspension member
US10477293B2 (en) 2017-02-28 2019-11-12 Sennheiser Electronic Gmbh & Co. Kg Headphone
US20190321853A1 (en) * 2018-04-24 2019-10-24 uBeam Inc. Elastic layer for ultrasonic transducer

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US1990409A (en) * 1932-02-19 1935-02-05 Neville Athol Ernest Acoustical diaphragm
US3665124A (en) * 1968-12-30 1972-05-23 Nippon Musical Instruments Mfg Loudspeaker having annular diaphragm with double voice coil
US3979566A (en) * 1973-12-12 1976-09-07 Erazm Alfred Willy Electromagnetic transducer
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Also Published As

Publication number Publication date
EP2163120B1 (fr) 2017-04-05
DE102007005620A1 (de) 2008-08-07
US8731231B2 (en) 2014-05-20
WO2008092645A2 (fr) 2008-08-07
DE102007005620B4 (de) 2011-05-05
WO2008092645A3 (fr) 2008-12-11
US20100183173A1 (en) 2010-07-22

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