EP0614327B1 - Transducteur électro-acoustique ayant une paroi de séparation et une paroi de masque - Google Patents

Transducteur électro-acoustique ayant une paroi de séparation et une paroi de masque Download PDF

Info

Publication number
EP0614327B1
EP0614327B1 EP94200503A EP94200503A EP0614327B1 EP 0614327 B1 EP0614327 B1 EP 0614327B1 EP 94200503 A EP94200503 A EP 94200503A EP 94200503 A EP94200503 A EP 94200503A EP 0614327 B1 EP0614327 B1 EP 0614327B1
Authority
EP
European Patent Office
Prior art keywords
transducer
partition
openings
wall
sectional area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94200503A
Other languages
German (de)
English (en)
Other versions
EP0614327A1 (fr
Inventor
Ewald Frasl
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP0614327A1 publication Critical patent/EP0614327A1/fr
Application granted granted Critical
Publication of EP0614327B1 publication Critical patent/EP0614327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Definitions

  • the invention relates to an electroacoustic transducer with a membrane that is designed to vibrate parallel to a transducer axis, and with a partition that is opposite the rear side of the membrane and runs essentially transversely to the transducer axis and in which they penetrate partition openings to form a connection between one between the membrane and the one side of the partition wall and a second space on the other side of the partition wall are provided, the partition openings surrounding a central passage in the partition belonging to the first space, and with a mask wall that adjoins one of the two Sides of the partition is arranged adjacent and in which they penetrate mask wall openings are provided to form a connection between the two rooms and by means of an acoustically sealed connection which is closed in the circumferential direction and which is radial from the transducer axis
  • Directions outside the partition openings and the mask wall openings is mechanically fixed to the partition, at least one of the openings in one of the two walls has a small cross-sectional area of at most 0.2 mm
  • the partition and the mask wall with one lying in a peripheral region of the mask wall Adhesive connection mechanically tight and acoustically tightly connected.
  • the Adhesive connection is only very thin, so that the two meet adjacent walls, i.e. the partition wall and the mask wall of the converter, touch each other practically immediately.
  • the mask wall is through one Flange of a pot of a transducer magnet system is formed, which pot the through the central passage in the partition, the first room of the Transducer in the area of the rear of the converter is completely sealed, so that the partially between the membrane and one side of the partition wall Room and the second room of the known on the other side of the partition Transducer only through the acoustically effective, through the overlapping openings in the partition and the mask wall connections are connected to each other, otherwise they are completely acoustically separated.
  • the two form Rooms each have an acoustic condenser and each is formed by two overlapping ones Openings in the two walls formed an acoustically effective connection acoustic inductance and an acoustic one in series with this inductance Resistance, with each connection opening with the smaller one Cross-sectional area of the essential, the size of the inductance and the size of the Series-determining part of the connection is.
  • the size of the series resistor is due to the cross-sectional area and also in the direction of Transducer axis length of an opening with the smaller cross-sectional area certainly.
  • the length of such an opening is relative for reasons of manufacturability limited, so that overall only a relatively small resistance value of such acoustic series resistance is obtained.
  • the two rooms in combination with the acoustically effective connections between the two rooms form two so-called Helmholtz resonators, their resonance behavior and thus their Exaggerated resonance through the capacitance values of those formed by the rooms acoustic capacitors and by the inductance values and the resistance values the acoustic inductances formed by the connections and to the latter in Series lying resistors are determined.
  • the invention has for its object the above Eliminate difficulties and an electroacoustic transducer in the beginning to effectively improve the genus mentioned in the first paragraph with simple means, to get a converter with a smooth frequency response.
  • the Transducers according to the invention characterized in that each has a small one Cross-sectional area in one of the two walls between two provided between the two walls, from the central one Passage in the partition essentially each having the same distance Spacer lies and that two spacers together with the two walls one between the two walls define a channel-like gap that leads to the central one Passage in the partition leads and forms an acoustic resistance.
  • each acoustically effective channel-like gap of the two spacers between the two walls and the two walls all around is limited and a relatively precisely defined length up to the passage in the Partition has what with regard to a particularly precise definition of Resistance value of the acoustic bypass resistance determined by such a gap is advantageous.
  • the gap height by exactly measurable spacers and its gap length is also precisely determined in its Size can be determined very precisely because its size can be precisely controlled Gap dimensions is set.
  • the spacers can protrude radially inwards Spacer flags one that can be inserted between the partition and the mask wall separate spacer ring.
  • each spacer is integrally formed with one of the two walls is. This is advantageous in terms of a structurally particularly simple design.
  • each spacer part in Direction of the transducer axis has a height between 20 microns and 50 microns. At Studies have shown that such training is particularly good Results are achieved.
  • each opening with a smaller one Cross-sectional area has a circular cross-section and the diameter of each such opening with a circular cross section in its acoustically effective Cross-sectional area is less than 0.3 mm.
  • Such openings or holes with small Diameters are very accurate in compliance with specified dimensions very small tolerances can be produced, so that with such openings precisely defined by the ratio of the acoustically effective cross-sectional area and the length of the opening certain acoustic inductance values and resistance values and thus exactly defined influences of the connections formed with the help of the openings between the both rooms of the transducer can be achieved on the acoustic behavior of the transducer.
  • each such Opening with a circular cross section in its axial direction a conical Training.
  • This is in view of a precisely defined definition of the acoustically effective cross-sectional area of such an opening advantageous to the Area of the smallest diameter of the opening is concentrated. Furthermore, this is in the With regard to the good manufacturability of such an opening in a plastic part advantageous, because of the easy demoldability.
  • FIG. 1 shows a cross section along the line I-I in FIG. 2 on a larger scale than the natural size, in a somewhat more schematic way
  • An electrodynamic converter according to an embodiment of the invention which is designed as a hearing or speaking capsule for telephony applications and has a partition with openings and a mask wall with openings, between them, acoustic bypass resistors formed with the help of spacers forming channel-like column are provided.
  • 2 shows in one Section along the line II-II in Fig. 1, the converter according to Fig. 1.
  • Fig. 3 shows in a cross section on a larger scale than FIG. 1 a detail of the Converter according to Figures 1 and 2, the conical in its partition Partition openings.
  • the converter 1 and 2 show an electrodynamic converter 1, which is designed as a hearing or speaking capsule.
  • the converter 1 has an im essentially circular or hollow cylindrical holding device 2.
  • the holding device 2 has an annular outer wall 3, which in its one Front of the transducer 1 facing area is provided with a gradation 4.
  • the step 4 forms a holding zone on which a membrane 5 of the transducer 1 is attached an adhesive connection is attached.
  • the membrane 5 has a central region 6 which is often referred to as the cathedral.
  • the membrane 5 has one peripheral edge region 7, in which hyperbolic beads are provided, which is not recognizable in Fig. 1. With the free end 8 of the edge region 7 the membrane 5 is attached to the step 4 of the holding device 2 by gluing.
  • the Diaphragm 5 can oscillate back and forth parallel to a transducer axis 9 trained and emits audible on the membrane front 10 in operation Useful vibrations.
  • a voice coil 12 In the transition area 11 between the middle area 6 and the The edge region 7 of the membrane 5 is a voice coil 12 by means of the membrane 5 an adhesive bond connected.
  • the voice coil 12 projects here with its from the Area 14 facing away from membrane rear side 13 into an air gap 15 of a Magnet system 16 of the transducer 1.
  • the magnet system 16 has a magnet 17 and a pole plate 18 and a pot 19, often referred to as an outer pot becomes. Between the peripheral boundary surface 20 of the pole plate 18 and the End region 21 of the hollow cylindrical pot part 22 which through the bottom part 23 of the Pot 19 is completed, the air gap 15, in which the area 14 of the Voice coil 12 is located.
  • the holding device 2 has an essentially circular partition 24 which projects inwards from the outer wall 3 in radial directions, which in this case is opposite the diaphragm rear side 13 of the diaphragm 5 and extends transversely to the transducer axis 9.
  • the dividing wall 24 is provided with four dividing wall openings 25, 26, 27 and 28, which are arranged at 90 ° to each other and are at an angle to each other and penetrate the dividing wall 24, essentially having a slit-shaped and relatively large cross-sectional area.
  • the partition wall 24 is arranged with four angularly offset from one another by 90 ° and 45 ° from the slot-shaped partition wall openings 25, 26, 27 and 28, likewise penetrating the partition wall 24, a circular and relatively small cross-sectional area of approximately 0.1 mm 2 having partition openings 29,30, 31 and 32.
  • the partition openings 25, 26, 27, 28 and 29, 30, 31, 32 are used to form acoustically effective connections between a first space 34 located between the membrane 5 and one side 33 of the partition 24 and one on the other side 35 the partition 24 is provided second space 36.
  • the electrodynamic converter 1 embodied as a capsule according to FIGS. 1 and 2
  • the second space 36 is closed off in the region of the rear side of the converter 1, which will be discussed below.
  • the slot-shaped partition openings 25, 26, 27 and 28 can have a length of approximately 6 mm. It has proven to be advantageous if the circular partition openings 29, 30, 31 and 32 with a smaller cross-sectional area have a diameter of less than 0.3 mm and preferably of 0.2 mm. However, the circular partition openings can also have a diameter of, for example, only 50 or 40 ⁇ m.
  • the circular partition openings 29, 30, 31 and 32 have a conical design in their axial direction, as can be seen in FIG. 3 for the partition opening 30.
  • the annular partition wall 24 surrounds a central passage 37 provided in it, which belongs to the first space 34.
  • the converter 1 also has one on the side 35 of the partition 24 adjacently arranged and in this case with means described below in mask wall 38 held at a small distance from the partition wall 24.
  • the Mask wall 38 is arranged with four, each offset by 90 ° to each other Mask wall 38 penetrating, a slit-shaped and relatively large Cross-sectional area having mask wall openings 39, 40, 41 and 42, to form the acoustically effective connections between the two rooms 34 and 36 are provided.
  • the slit-shaped Mask wall openings 39, 40, 41 and 42 have a length of approximately 5 mm and a width of about 2.2 mm.
  • the partition wall 24 and the mask wall 38 are in one brought such relative position to each other and recorded in that the circular partition openings 29,30,31 and 32 with a small cross-sectional area with the slit-shaped mask wall openings 39, 40, 41 and 42 with a cover a larger cross-sectional area.
  • This way is in the range of each two overlapping openings a small acoustically effective cross-sectional area the respective connection between the two rooms 34 and 36 achieved by the cross-sectional area of the circular partition openings 29, 30, 31 and 32 exactly is defined and for the implementation of a transducer designed as a capsule and the frequency characteristic required for such a capsule is required.
  • the converter 1 has the Pot 19 of the magnet system 16 has a flange 38 running transversely to the transducer axis 9 with which the pot 19 for fastening the entire magnet system 16 to the Partition 24 is glued, along a circumferential direction in itself closed, essentially circular, in the outer region of the flange 38 located adhesive connection 43, the inner boundary 44 in Fig. 2 with a dash-dotted line is indicated schematically.
  • Such an adhesive connection 43 in practice, of course, has a limitation 44 which is not exactly such has a circular course.
  • the one with its flange 38 on the adhesive connection 43 the partition 24 attached pot 19 also serves in the converter 1 also for the acoustic completion of the over the central passage 37 in the Partition 24 of the first space 34 of the converter 1.
  • the flange 38 of the pot 19 of the magnet system 16 not only forms a fastening part for fastening the magnet system 16 to the holding device 2, but also in a particularly simple and very advantageous manner Mask wall 38 of the converter 1.
  • the mask wall 38 of the converter 1 not by a separate component, but by a component an existing component of the converter 1, namely through the flange 38 of the Pot 19 of the magnet system 16 of the transducer 1 is formed.
  • This is regarding lower component costs and especially with regard to as few as possible Assembly steps and the lowest possible assembly costs are an advantage.
  • Assembly steps and assembly costs are such in mass production electrodynamic converter 1 of great importance because it makes it easier built assembly line the Ausmaschine is found.
  • no additional tolerance influences causes what in terms of good reproducibility of acoustic behavior of the converter 1 is advantageous.
  • the second room 36 on the other side 35 of the partition 24 is completed.
  • a closing part 45 which is plate-shaped is trained.
  • the end part 45 is provided with an opening 46 which in present case has a circular cross section and with which the End part 45 with an acoustically tight fit on the outer peripheral surface 47 of the Pot 19 of the magnet system 16 is placed.
  • the end part 45 has a Breakthrough 46 surrounding edge area 48 with which the end portion 45 with the Outer wall 3 of the holding device 2 is acoustically sealed and mechanically firmly connected.
  • the holding device 2 or its outer wall 3 thus forms in the present case Transducer 1 a room boundary part for delimiting the second room 36.
  • Die Holding device 2 and the end part 45 consist of the same Plastic material and are mechanically strong thanks to an ultrasonic welding connection connected with each other.
  • the end part 45 is open particularly simple way only by means of a mechanical press fit with the pot 19 of the Magnet system 16 connected to its outer peripheral surface 47.
  • the partition 24 and the mask wall 38 is also in a different position relative to one another than this is shown in Figures 1 and 2.
  • the partition 24 and the mask wall 38 that is, the flange 38 of the pot 19th of the magnet system 16 are in a position relative to one another in which the slot-shaped partition openings 25, 26, 27 and 28 with the slot-shaped Cover mask wall openings 39, 40, 41 and 42.
  • the converter 1 according to the invention according to FIGS. 1 and 2 is open achieved in a particularly simple manner that the end part 45 of the transducer 1 with respect the transducer axis 9 within the axial level range of the magnet system 16 of the Transducer 1 is, so in the direction of the converter axis 9 no additional space takes up. In this way, the converter has a particularly low overall height 1 in the direction of its transducer axis 9, so that such a transducer 1 Also suitable for installation in particularly flat telecommunications devices.
  • each a small cross-sectional area having partition opening 29,30,31,32 in the partition 24 between two provided between the partition 24 and the mask wall 38, from the central Passage 37 in the partition 24 is essentially the same distance apart Spacers 49.50 or 51.52 or 53.54 or 55.56, which the partition 24 and keep the mask wall 38 a short distance apart.
  • Two spacers each 49.50 or 51.52 or 53.54 or 55.56 limit one between the partition 24 and the mask wall 38 lying around, limited to the passage 37 in the partition wall 24 leading, forming an acoustic resistance channel-like gap 57,58,59, 60.
  • Each of the spacers 49,50,51,52,53,54,55,56 is with the Partition 24 formed in one piece.
  • the spacers are used in the manufacture of the Holding device 2, of which the partition 24 forms an integral part get simple and practical without additional measures, namely in the to manufacture the holding device 2 injection molding process.
  • everyone who Spacers 49 to 56 have in the present converter 1 according to FIGS. 1 to 3 in the direction of the transducer axis 9 to a height of about 50 microns. It should be mentioned that in Fig. 3, the height of the spacer 58 is shown larger than in relation to the other illustrated parts correspond to its actual natural size to the To increase the clarity of the drawing.
  • the spacer parts 49 to 56 have a rectangular shape Cross section on.
  • the spacers 49 to 56 are each in Area of one end of a slit-shaped mask wall opening 39,40,41,42 what it is advantageous in this way that the spacers 49 to 56 additionally Form barriers for the adhesive with which the mask wall 38 with the partition wall 24 is mechanically and acoustically tightly connected along the adhesive connection 43.
  • a converter according to the embodiment described above can each have a spacer and an opening with a small cross-sectional area be provided several times alternately in succession.
  • the spacers 49 to 56 can in plan view in Direction of the converter axis 9 also deviates from a rectangular shape Have cross-sectional shape and, for example, trapezoidal, triangular, oval-shaped or be designed differently.
  • the height of the spacers 49 to 56 can also be have a value other than 50 ⁇ m in the direction of the converter axis 9, for example, the spacers 49 to 56 can also be only 20 ⁇ m, but also 100 ⁇ m be highly trained.
  • spacers 49 to 56 can also be up to the Reach passage 37 in the partition 24.
  • the invention is based on the transducer as described above Embodiment not limited.
  • it can be used as a mask wall provided flange of the pot as in the converter described provided core pot magnet system also on the side facing the membrane abut a partition of such a holding device.
  • Another can also Magnet system as a pot core magnet system in a transducer according to the invention are used, for example a toroidal magnet system.
  • more than two different types of Partition openings can be provided, for example, with more than one type of Mask wall openings in a mask wall formed by a flange in different relative positions of the partition and the mask wall to each other to cover are feasible.
  • a partition Partition opening with a circular cross-section with a small diameter may be provided, each between two Spacers.
  • Such openings can also be circular Cross-section in the axial direction instead of a conical design also a have cylindrical shape. They can also be used to form one acoustic Effective connection provided openings with a smaller cross-sectional area in a mask wall of a converter and the openings with these in the mask wall coverable, also to form an acoustically effective Connection provided openings with a larger cross-sectional area in a partition wall a transducer can be provided with the help of spacers at a short distance is held by the mask wall.
  • the measures according to the invention are also at applicable to a converter in which the partition and the mask wall only in one Relative to each other brought and held in it.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Claims (6)

  1. Transducteur électro-acoustique (1) avec une membrane (5) qui est de conception vibrante parallèlement à un axe du transducteur (9) et avec une paroi de séparation (24) qui est opposée à la face postérieure de la membrane (13) et s'étend de manière essentiellement perpendiculaire à l'axe du transducteur (9) et dans laquelle sont prévues des ouvertures de paroi de séparation (25, 26, 27, 28, 29, 30, 31, 32) qui la traversent pour former une jonction entre un premier espace (34) situé entre la membrane (5) et l'un des côtés (33) de la paroi de séparation (24) et un deuxième espace (36) situé de l'autre côté (35) de la paroi de séparation (24), les ouvertures de paroi de séparation entourant un passage central (37) de la paroi de séparation (24) et faisant partie du premier espace et avec une paroi de masque (38) qui est disposée de manière adjacente à l'un (35) des deux côtés (33, 35) de la paroi de séparation (24) et dans laquelle sont prévues des ouvertures de paroi de masque (39, 40, 41, 42) la traversant en vue de la formation d'une jonction entre les deux espaces (34, 36) et qui est fixée de manière mécaniquement rigide à la paroi de séparation (24) à l'aide d'une jonction (43) acoustiquement étanche fermée en direction périphérique qui se situe en dehors des ouvertures de paroi de séparation (25, 26, 27, 28, 29, 30, 31, 32) et des ouvertures de paroi de masque (39, 40, 41, 42) en direction radiale vue à partir de l'axe du transducteur, au moins une des ouvertures (29, 30, 31, 32) dans l'une (24) des deux parois (24, 38) présentant une petite surface de section de 0,2 mm2 au plus et l'une des ouvertures (39, 40, 41, 42) prévues dans l'autre paroi (38) présentant une surface de section supérieure et recouvrant au moins l'une des ouvertures (29, 30, 31, 32) présentant une petite surface de section dans l'une des parois (24) pour la formation d'au moins une jonction avec une petite surface de section acoustiquement active entre les deux espaces (34, 36) dans la direction de l'axe du transducteur (9), caractérisé en ce que chaque ouverture (29, 30, 31, 32) présentant une petite surface de section dans l'une (24) des deux parois (24, 38) se situe entre deux pièces d'écartement (49, 50, 51, 52, 53, 54, 55, 56) prévues entre les deux parois (24, 38) et présentant chacune essentiellement la même distance par rapport à l'ouverture centrale (37) dans la paroi de séparation (24) et en ce que deux pièces d'écartement (49, 50; 51, 52; 52, 53; 54, 55) définissent avec les deux parois (24, 38) une fente (57, 58, 59, 60) en forme de canal disposée entre les deux parois (24, 38), laquelle mène vers l'ouverture centrale (37) dans la paroi de séparation (24) et forme une résistance acoustique.
  2. Transducteur (1) selon la revendication 1, caractérisé en ce que chaque pièce d'écartement (49, 50, 51, 52, 53, 54, 55, 56) est formée en une seule pièce avec une (24) des deux parois (24, 38).
  3. Transducteur (1) selon l'une des revendications 1 ou 2, caractérisé en ce que chaque pièce d'écartement (49, 50, 51, 52, 53, 54, 55, 56) présente une hauteur de l'ordre de 20 µm et 50 µm en direction de l'axe du transducteur (9).
  4. Transducteur (1) selon l'une des revendications 1, 2 ou 3, caractérisé en ce que chaque ouverture (29, 30, 31, 32) présentant une petite surface de section possède une section circulaire et que le diamètre de chacune de ces ouvertures (29, 30, 31, 32) avec une section circulaire dans sa zone de section acoustiquement active est inférieur à 0,3 mm.
  5. Transducteur (1) selon la revendication 4, caractérisé en ce que le diamètre de chaque ouverture (29, 30, 31, 32) avec une section circulaire est égal 0,2 mm dans sa zone de section acoustiquement active.
  6. Transducteur (1) selon l'une des revendications 4 ou 5, caractérisé en ce que chaque ouverture (29, 30, 31, 32) avec une section circulaire présente dans sa direction axiale une conception conique.
EP94200503A 1993-03-04 1994-02-28 Transducteur électro-acoustique ayant une paroi de séparation et une paroi de masque Expired - Lifetime EP0614327B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT419/93 1993-03-04
AT0041993A AT400911B (de) 1993-03-04 1993-03-04 Elektroakustischer wandler mit einer trennwand und einer maskenwand

Publications (2)

Publication Number Publication Date
EP0614327A1 EP0614327A1 (fr) 1994-09-07
EP0614327B1 true EP0614327B1 (fr) 1998-05-20

Family

ID=3490126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200503A Expired - Lifetime EP0614327B1 (fr) 1993-03-04 1994-02-28 Transducteur électro-acoustique ayant une paroi de séparation et une paroi de masque

Country Status (5)

Country Link
US (1) US5303209A (fr)
EP (1) EP0614327B1 (fr)
JP (1) JPH06327082A (fr)
AT (1) AT400911B (fr)
DE (1) DE59405970D1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63296382A (ja) * 1987-05-28 1988-12-02 Fanuc Ltd レ−ザ発振装置
AT398354B (de) * 1993-02-26 1994-11-25 Koninkl Philips Electronics Nv Elektroakustischer wandler mit einer maske
AT398355B (de) * 1993-02-26 1994-11-25 Koninkl Philips Electronics Nv Elektroakustischer wandler mit einem abschlussteil
US6327371B1 (en) 1995-12-29 2001-12-04 Jl Audio, Inc. Loudspeaker with cooling adapter
JP2001520848A (ja) * 1998-02-17 2001-10-30 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 電気音響変換器及び電気音響変換器用ダイアフラム
JP2002515216A (ja) * 1998-02-17 2002-05-21 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 電気音響変換器及び電気音響変換器用ダイアフラム
DE69935057T2 (de) * 1998-05-15 2007-11-22 Koninklijke Philips Electronics N.V. Gerät zum gebrauch am ohr oder entfernt vom ohr
GB2337890A (en) * 1998-05-29 1999-12-01 Nokia Mobile Phones Ltd Housing arrangement for a loudspeaker in a telephone
USD419561S (en) * 1999-01-07 2000-01-25 Speakercraft, Inc. Flush mount duplex-pivoting speaker unit
WO2000069214A2 (fr) * 1999-05-06 2000-11-16 New Transducers Limited Excitateur de vibrations
US6372066B1 (en) 1999-05-06 2002-04-16 New Transducers Limited Vibration exciter
US6219431B1 (en) 1999-10-29 2001-04-17 Lucio Proni Loudspeaker with improved cooling structure
US6229902B1 (en) 1999-11-09 2001-05-08 Lucio Proni Loudspeaker with frame cooling structure
EP1173291A1 (fr) * 2000-02-17 2002-01-23 Koninklijke Philips Electronics N.V. Appareil comportant un transducteur electro-acoustique formant des moyens de reproduction sonore et une partie des moyens generateurs de vibrations
JP4337078B2 (ja) * 2001-04-23 2009-09-30 日本電気株式会社 スピーカ装置
US7715584B2 (en) * 2006-01-03 2010-05-11 Jl Audio, Inc. Loudspeaker with air deflector
JP5432899B2 (ja) * 2008-07-10 2014-03-05 株式会社オーディオテクニカ ヘッドホンユニットおよびヘッドホン
DE202014003034U1 (de) * 2014-04-02 2015-04-07 Harman Becker Automotive Systems Gmbh Lautsprecher
JP6534185B2 (ja) * 2015-07-01 2019-06-26 株式会社オーディオテクニカ ヘッドホンユニットおよびヘッドホン
JP1602158S (fr) * 2017-09-05 2018-04-16
JP1602162S (fr) * 2017-09-12 2018-04-16

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8311907U1 (de) * 1983-08-04 D'Angelo, Antonio, 4600 Dortmund Gartengerät
JPS5156618A (en) * 1974-11-13 1976-05-18 Yukimatsu Nakamura Supiika
HU171882B (hu) * 1975-10-22 1978-04-28 Elektroakusztikai Gyar Napravlennyj ehlektroakusticheskij preobrazovatel', glavnym obrazom kardioidnyj zvukovoj izluchatel'
FR2490438A1 (fr) * 1980-09-17 1982-03-19 Telephonie Ind Commerciale Transducteur electrodynamique
DE3630951A1 (de) * 1986-09-11 1988-03-17 Siemens Ag Anordnung zur frequenzgangverbesserung fuer elektroakustische wandler
DE3825973A1 (de) * 1988-07-29 1990-02-01 Siemens Ag Elektroakustischer einheitswandler
US4918738A (en) * 1988-12-05 1990-04-17 Federal Signal Corporation Structural assembly for housing an acoustical system
DE9013352U1 (fr) * 1990-09-21 1990-11-22 Blaupunkt-Werke Gmbh, 3200 Hildesheim, De
US5181253A (en) * 1991-01-08 1993-01-19 Southern Audio Services, Inc. Loudspeaker assembly
US5166984A (en) * 1991-11-06 1992-11-24 Hsiao Yu Teng Loudspeaker

Also Published As

Publication number Publication date
AT400911B (de) 1996-04-25
DE59405970D1 (de) 1998-06-25
JPH06327082A (ja) 1994-11-25
EP0614327A1 (fr) 1994-09-07
ATA41993A (de) 1995-08-15
US5303209A (en) 1994-04-12

Similar Documents

Publication Publication Date Title
EP0614327B1 (fr) Transducteur électro-acoustique ayant une paroi de séparation et une paroi de masque
EP0615398B1 (fr) Transconducteur électroacoustique avec un masque
DE60003904T2 (de) Elektroakustischer wandler mit einer membran, und verfahren zur fixierung der membran in einem solchen wandler
DE3211072C3 (de) Elektret-Richtmikrofon
DE2932942C2 (fr)
DE2946618C2 (fr)
DE112009002210B4 (de) Schwingungsabsorber mit eingeschlossener Flüssigkeit
DE2913957C3 (de) Piezoelektrischer Lautsprecher
DE19757097B4 (de) Schallwiedergabeanordnung
DE3502539A1 (de) Ein stroemungsmittel enthaltende triebwerk-montageeinrichtung
DE19654156A1 (de) Lautsprechereinheit und die Lautsprechereinheit verwendendes Lautsprechersystem
EP0616483B1 (fr) Transducteur électroacoustique avec fermeture
EP1078551B1 (fr) Haut-parleur a panneaux
DE10322692B4 (de) Membran für elektroakustische Wandler, elektroakustischer Wandler und Lautsprecher
DE69917148T2 (de) Elektroakustischer wandler und membrane für elektroakustischen wandler
EP1927263B1 (fr) Transducteur acoustique capacitif ayant un disque d'amortissement perfore
EP1125471B1 (fr) Microphone
DE1081050B (de) Elektroakustischer Tonaufnehmer
DE102006042855B4 (de) Kondensatormikrofon
DE2909065A1 (de) Droehnfreie mikrophonkombination mit zwei mikrophonelementen
AT401703B (de) Elektroakustischer wandler mit einer durchsteckreibung
DE3050350C1 (fr)
DE3024728A1 (de) Treibereinrichtung fuer eine planarmembran-lautsprecheranordnung
DE1512702C (de) Elektroakustischer Wandler
DE2206093B2 (de) Elektroakustischer Wandler, insbesondere für Sprech- und Hörkapseln von Fernsprechapparaten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK FR GB

17P Request for examination filed

Effective date: 19950307

17Q First examination report despatched

Effective date: 19970131

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR GB

REF Corresponds to:

Ref document number: 59405970

Country of ref document: DE

Date of ref document: 19980625

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980619

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980820

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V.

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20021014

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040226

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040227

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040415

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20051031