EP2040487A1 - Canal de bruit pour un dispositif auditif et son procédé de fabrication - Google Patents

Canal de bruit pour un dispositif auditif et son procédé de fabrication Download PDF

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Publication number
EP2040487A1
EP2040487A1 EP08105168A EP08105168A EP2040487A1 EP 2040487 A1 EP2040487 A1 EP 2040487A1 EP 08105168 A EP08105168 A EP 08105168A EP 08105168 A EP08105168 A EP 08105168A EP 2040487 A1 EP2040487 A1 EP 2040487A1
Authority
EP
European Patent Office
Prior art keywords
sound channel
injection
negative
sound
sections
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.)
Ceased
Application number
EP08105168A
Other languages
German (de)
English (en)
Inventor
Björn Freels
Holger Kral
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.)
Sivantos Pte Ltd
Original Assignee
Siemens Medical Instruments Pte Ltd
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 Siemens Medical Instruments Pte Ltd filed Critical Siemens Medical Instruments Pte Ltd
Publication of EP2040487A1 publication Critical patent/EP2040487A1/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/658—Manufacture of housing parts
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means

Definitions

  • the present invention relates to a method for producing a sound channel for a hearing device. Moreover, the present invention relates to a corresponding sound channel for a hearing device.
  • hearing device is understood here to mean, in particular, a hearing device, but also any other device for sound output which can be worn on / in the ear, for example a headset, headphones and the like.
  • Hearing aids are portable hearing aids that are used to care for the hearing impaired.
  • different types of hearing aids such as behind-the-ear hearing aids (BTE), hearing aid with external receiver (RIC: receiver in the canal) and in-the-ear hearing aids (IDO), e.g. Concha hearing aids or canal hearing aids (ITE, CIC).
  • BTE behind-the-ear hearing aids
  • RIC hearing aid with external receiver
  • IDO in-the-ear hearing aids
  • ITE canal hearing aids
  • the hearing aids listed by way of example are worn on the outer ear or in the ear canal.
  • bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The stimulation of the damaged hearing takes place either mechanically or electrically.
  • Hearing aids have in principle as essential components an input transducer, an amplifier and an output transducer.
  • the input transducer is usually a sound receiver, z. As a microphone, and / or an electromagnetic receiver, for. B. an induction coil.
  • the output transducer is usually used as an electroacoustic transducer, z. As miniature speaker, or as an electromechanical transducer, z. B. bone conduction, realized.
  • the amplifier is usually integrated in a signal processing unit. This basic structure is in FIG. 1 shown using the example of a behind-the-ear hearing aid. In a hearing aid housing 1 for Carrying behind the ear, one or more microphones 2 are installed for recording the sound from the environment.
  • a signal processing unit 3 which is also integrated in the hearing aid housing 1, processes the microphone signals and amplifies them.
  • the output signal of the signal processing unit 3 is transmitted to a loudspeaker or earpiece 4, which outputs an acoustic signal.
  • the sound is optionally transmitted via a sound tube, which is fixed with an earmold in the ear canal, to the eardrum of the device carrier.
  • the power supply of the hearing device and in particular of the signal processing unit 3 is carried out by a likewise integrated into the hearing aid housing 1 battery. 5
  • An urgent goal in hearing aid development is to accommodate as many components as possible in the smallest possible housing. For this, a high degree of design freedom in the individual components is very conducive. This applies equally to active and passive components. So it is particularly advantageous if the connecting element between the support hook and the handset, i. the sound channel between the two components, the requirements can be shaped accordingly.
  • connection between the sound tube connecting piece (carrying hook) and the receiver or hearing device is made mechanically stable and acoustically tight.
  • the connection should be feasible as a screw or plug connection or a combination of both.
  • the connecting element should also be able to take over bearing functions for a component of the hearing aid.
  • the connecting element despite the high demands on its accuracy and stability is inexpensive to produce and takes up as little space.
  • the component has a high Freedom of design is given. Under certain circumstances, it is necessary that undercuts on the connecting element or sound channel are provided.
  • fittings made of metal are mainly used in hearing aids as connecting elements between the handset and the carrying hook. These are complex turned and milled parts, which usually have to be bent afterwards. They are usually designed for screw or plug connections or combinations of the two.
  • plastic connectors are known.
  • solutions in which a metal connector and a plastic support frame for the hearing aid components are integrated in an injection part, are known in practice.
  • the object of the present invention is to provide a sound channel for a hearing device, which has a relatively complex shape and yet is easy to manufacture and mechanically stable.
  • this object is achieved by a method for producing a sound channel for a hearing device that has three sections in the longitudinal direction, of which the middle section has a different curvature or a larger inner circumference than the two outer sections, by providing an injection mold for the sound channel, Fixing a negative of the sound channel within the injection mold, wherein the negative consists of a first material. Pouring the injection mold with a second material having a higher melting point than the first material, and melting or burning out the negative from the cast acoustic channel.
  • a sound channel is provided for a hearing device which has three sections in the longitudinal direction, of which the middle section has a different curvature or a larger inner circumference than the two outer sections, and which is injection molded by the above method.
  • the sound channel is no longer limited in its manufacture in injection molding in terms of its shape that it only has two different curved sections, in which it can be ensured that the mold parts can be pulled in both opposite longitudinal directions from the newly injected sound channel. Since the negative located inside the newly injected sound channel is not pulled out, but melted out or burned out, almost any forms of the negative are possible. At the same time, injection molding enables precise and mechanically stable injection molding elements.
  • the second material that is the sprayed material
  • Metals are characterized by their high robustness especially in bending stress.
  • the second material from which the sound channel is injected is a ceramic and in particular a ceramic containing zirconia.
  • the ceramics are characterized not only by their high mechanical stability, but also by the low thermal expansion coefficient.
  • the sound channels can be sintered. As a result, the ceramic injection-molded part is further compressed and cured.
  • the negative is a plastic injection molded part.
  • plastic negatives can be easily melted out of the metal or ceramic sound channels or burn out because of their lower melting point.
  • nozzles, cavities and the like can be formed in or on the sound channel. Such nozzles or cavities may be advantageous for acoustic reasons and do not present any problems during demoulding of the injection-molded parts, here the melting or burning out of the negative.
  • the sound channel can have at least one branch. This too can provide acoustic benefits and also poses no problems with respect to demoulding.
  • FIG. 2 a sound channel 10 is shown, which is wound around an obstacle 11.
  • a sound channel 10 is shown, which is wound around an obstacle 11.
  • sound channels which represent the connecting element between the wearing hook and the receiver in a BTE hearing aid, but also in sound channels, for example, between a sound inlet opening and a microphone.
  • FIG. 3 the sound channel 10 and the obstacle 11 is shown in plan view.
  • the sound channel 10 is divided into three sections 12, 13 and 14 purely for orientation.
  • Each of these sections 12, 13 and 14 has a different curvature.
  • the curvature in the middle section 13 deviates from that of the two outer sections 12 and 14.
  • not only the amount of curvature in the central portion 13 is different than in the two edge portions 12 and 14, but also the sign of the curvature.
  • FIG. 4 is the sound channel 10 of 2 and FIG. 3 shown in the side view. From this view, it can be seen that each of the two edge sections 12 and 14 each have a plurality of different curvatures.
  • section 141 is from the perspective of FIG. 4 rather straight, while the section 142 is clearly curved.
  • the sound channel 10 thus has a plurality of sections, each with a different curvature. This is particularly due to the fact that the sound channel is a three-dimensional structure and thus has different curvatures in three different spatial directions. This means that the curvatures in the individual sections can not only differ by magnitude and sign, but also in the solid angle.
  • FIGS. 2 to 4 shown sound channels (as well as the sound channel of FIG. 5 ) are manufactured as injection molded parts.
  • the interior 15 of the sound channel would have to be kept free by a corresponding molding during the injection molding process. After spraying this molding must be pulled out of the sound channel.
  • the sound channel has only two different curvatures, then one half of the molding for the first curvature can be taken from one side of the sound channel and the other half of the molding with the second curvature from the other opening of the sound channel.
  • a negative of the sound channel which keeps the interior 15 free, fixed from a low-melting material in the injection mold as a placeholder.
  • the negative is designed for example as a plastic injection molded part.
  • a metal injection molding process MIM a connecting element or a sound channel made of titanium or another metal.
  • zirconium dioxide (ZrO 2 ) or another ceramic a sound channel can be produced as a ceramic injection molded part.
  • the negative is burned out or melted out. In the case of ceramic injection molding, this burnout can be done together with the burning out of the binder.
  • the manufacturing process of the ceramic injection molded part is completed by sintering the finished green compact.
  • FIG. 5 Another embodiment of an injection molded sound channel is shown in FIG FIG. 5 shown.
  • the sound channel 10 here has a cavity 16 with an enlarged inner circumference. While the inner circumference in the two edge sections 12 and 14 is relatively small, it is significantly larger in the middle section 13 than in the two edge sections 12 and 14.
  • Such a sound channel for a hearing device in the edge regions 12 and 14 about an inner diameter of one millimeter has, could not be made with conventional injection molding technology, because a placeholder for the cavity 16 could not be removed from the sound channel 10 to one of the two sides.
  • only the manufacturing method according to the invention allows injection molding of the sound channel, in which namely the negative after injection molding from the sound channel or burned out.
  • the cavity can assume almost any shape, such as cuboid, cylindrical, spherical and the like.
  • the manufacturing method according to the invention thus enables a very high freedom of design of the sound channel. So undercuts can be introduced, as is the case for example in the cavities, branches or other complex channels of the sound channel.
  • the sound channel additional acoustic functions, as they can be realized, for example, through nozzles and cavities are given.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Headphones And Earphones (AREA)
EP08105168A 2007-09-18 2008-08-28 Canal de bruit pour un dispositif auditif et son procédé de fabrication Ceased EP2040487A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007044550A DE102007044550A1 (de) 2007-09-18 2007-09-18 Schallkanal für eine Hörvorrichtung und entsprechendes Herstellungsverfahren

Publications (1)

Publication Number Publication Date
EP2040487A1 true EP2040487A1 (fr) 2009-03-25

Family

ID=39968260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08105168A Ceased EP2040487A1 (fr) 2007-09-18 2008-08-28 Canal de bruit pour un dispositif auditif et son procédé de fabrication

Country Status (3)

Country Link
US (1) US8094849B2 (fr)
EP (1) EP2040487A1 (fr)
DE (1) DE102007044550A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007052648A1 (de) * 2007-11-05 2009-05-07 Siemens Medical Instruments Pte. Ltd. Hörhilfsgerät, insbesondere HdO-Hörgerät
CN101729955B (zh) * 2008-10-15 2014-03-26 诸爱道 安全耳塞机
CN102075843B (zh) * 2011-01-31 2013-11-06 杭州惠耳听力技术设备有限公司 仿生式耳背助听器及制造方法
EP2552128A1 (fr) * 2011-07-29 2013-01-30 Sonion Nederland B.V. Microphone directionnel à cartouche double
WO2015099672A1 (fr) 2013-12-23 2015-07-02 Hewlett-Packard Development Company, L.P. Ecriture d'informations sur des affichages sur substrat

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544930A (en) * 1922-12-01 1925-07-07 Doehler Die Casting Co Method of casting
GB622456A (en) * 1944-12-02 1949-05-03 Austenal Lab Inc Improvements in or relating to patterns for moulds
DE1807193A1 (de) * 1968-11-06 1970-05-27 Guenter Geschke Formkern und Verfahren zum Spritzen,Giessen,Pressen od.dgl. von Formteilen
GB2025836A (en) * 1978-05-31 1980-01-30 Nitto Electric Ind Co Molding a Plastics Article Having an Intricately Shaped Hollow Portion
JPH07304057A (ja) * 1994-05-13 1995-11-21 Toyo Mach & Metal Co Ltd 消失性中子を用いた射出成形方法
WO1999020417A1 (fr) * 1997-10-20 1999-04-29 James Buckley Fabrication de moulages de precision a l'aide de matieres thixotropes
US7174028B1 (en) * 2000-09-07 2007-02-06 Phonak Ag Method for manufacturing hearing aids, and a hearing aid

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530254A1 (de) * 1995-08-17 1997-02-20 Gerhard Dr Ing Betz Verfahren zur Erzeugung von Hohlräumen in Gußteilen und Form (Teil II)
US6962189B2 (en) * 1997-10-20 2005-11-08 Chipless Metals Llc Method of making precision castings using thixotropic materials
DE10247524B4 (de) * 2002-10-11 2004-08-12 Siemens Ag Kraftstoffverteiler
DE10333293A1 (de) * 2003-07-22 2005-03-03 Siemens Audiologische Technik Gmbh Anschlussstück für Hörgerätetragehaken
US7844065B2 (en) * 2005-01-14 2010-11-30 Phonak Ag Hearing instrument
DE102005013834A1 (de) * 2005-03-24 2006-09-28 Siemens Audiologische Technik Gmbh Verfahren zur Herstellung einer Hörhilfekomponente und entsprechende Hörhilfekomponente
US7720243B2 (en) * 2006-10-12 2010-05-18 Synygis, Llc Acoustic enhancement for behind the ear communication devices
US20100272299A1 (en) * 2007-10-30 2010-10-28 Koenraad Van Schuylenbergh Body-worn wireless transducer module

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544930A (en) * 1922-12-01 1925-07-07 Doehler Die Casting Co Method of casting
GB622456A (en) * 1944-12-02 1949-05-03 Austenal Lab Inc Improvements in or relating to patterns for moulds
DE1807193A1 (de) * 1968-11-06 1970-05-27 Guenter Geschke Formkern und Verfahren zum Spritzen,Giessen,Pressen od.dgl. von Formteilen
GB2025836A (en) * 1978-05-31 1980-01-30 Nitto Electric Ind Co Molding a Plastics Article Having an Intricately Shaped Hollow Portion
JPH07304057A (ja) * 1994-05-13 1995-11-21 Toyo Mach & Metal Co Ltd 消失性中子を用いた射出成形方法
WO1999020417A1 (fr) * 1997-10-20 1999-04-29 James Buckley Fabrication de moulages de precision a l'aide de matieres thixotropes
US7174028B1 (en) * 2000-09-07 2007-02-06 Phonak Ag Method for manufacturing hearing aids, and a hearing aid

Also Published As

Publication number Publication date
DE102007044550A1 (de) 2009-03-26
US20090074217A1 (en) 2009-03-19
US8094849B2 (en) 2012-01-10

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