EP0325107B1 - Verfahren zur Herstellung einer Otoplastik oder eines Ohrpassstückes - Google Patents

Verfahren zur Herstellung einer Otoplastik oder eines Ohrpassstückes Download PDF

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Publication number
EP0325107B1
EP0325107B1 EP89100102A EP89100102A EP0325107B1 EP 0325107 B1 EP0325107 B1 EP 0325107B1 EP 89100102 A EP89100102 A EP 89100102A EP 89100102 A EP89100102 A EP 89100102A EP 0325107 B1 EP0325107 B1 EP 0325107B1
Authority
EP
European Patent Office
Prior art keywords
ear
shaped part
foam
protective cover
coated
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
EP89100102A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0325107A1 (de
Inventor
Hans Henneberger
Rainer Basel
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 GmbH
Original Assignee
Siemens AG
Siemens Audioligische Technik GmbH
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 AG, Siemens Audioligische Technik GmbH filed Critical Siemens AG
Priority to AT89100102T priority Critical patent/ATE82662T1/de
Publication of EP0325107A1 publication Critical patent/EP0325107A1/de
Application granted granted Critical
Publication of EP0325107B1 publication Critical patent/EP0325107B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R25/652—Ear tips; Ear moulds
    • H04R25/656—Non-customized, universal ear tips, i.e. ear tips which are not specifically adapted to the size or shape of the ear or ear canal
    • 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
    • H04R25/659—Post-processing of hybrid ear moulds for customisation, e.g. in-situ curing
    • 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

Definitions

  • the invention relates to a method for producing an otoplastic or an ear mold according to the preamble of claim 1.
  • the carrier part can e.g. the housing of an in-the-ear hearing aid (e.g. "Custom Made") or the shell of a modular ITE hearing aid or the formwork cable of a behind-the-ear hearing aid.
  • Otoplastics and customer-specific earmolds are used in particular when fitting a hearing aid to the shape of the ear canal of a hearing impaired person. Such earmolds and earmolds firstly ensure that the hearing aid is firmly positioned so that the hearing aid cannot slip or even fall out of the ear.
  • the otoplastic or the earmold has a sound-absorbing effect in order to avoid feedback between the microphone and the listener of the hearing aid.
  • Otoplastics are usually intended as an adaptation for in-the-ear hearing aids (ITE devices), whereas earmolds are suitable for behind-the-ear hearing aids (BTE devices).
  • DE-AS 12 31 304 describes a method according to which a self-hardening plastic is distributed on a basic body simulating the basic shape of the auditory canal of the human ear and the coated basic body is then inserted directly into the auditory canal of the hearing-impaired ear until it now reaches the inner contour of the ear canal is hardened plastic.
  • the adaptation to the inner contour is not yet optimal. Pressing the plastic-coated basic shape into the ear creates the risk of pushing plastic too far into the ear canal.
  • this method requires a large number of different standard base bodies, since the plastic coating is not sufficient to adapt sufficiently to all ear canal shapes using a unitary base body.
  • the soft plastic material is injected into the ear.
  • a suitable stamp is then pressed into the mass before it hardens.
  • DE-AS 24 59 259 describes a further possibility of producing an ear mold without using an impression or negative.
  • the sound channel of the hearing aid is held in the ear canal by means of an enclosing pocket filled with liquid.
  • the bag adapts to the shape of the ear canal by pressing a pressure ring against the bag.
  • a disadvantage of this solution is that the liquid in the pocket does not harden. It exists So there is always the danger that the bag will tear and the liquid will leak into the ear.
  • Foam moldings for earmolds have recently been developed. Such molded foam parts have long been known as noise protection plugs and are manufactured in series. It is not adapted to individual ear canals. The foam parts are simply pressed together and put in the ear, where they then puff up again. Manufacturers of such foam plugs include Grace Chemistry, Heidelberg, and 3M, USA (see, for example, "COMPLY TM Instant Earmold", No. 70-2008-2478-0 (77.5) 11 from 3M and the article “Disposable Foam Earmolds" by Smolak et al. in "Hearing Instruments", Volume 38, No. 12, 1987).
  • foams are less suitable as a pure otoplastic replacement for an in-the-ear hearing aid, since the foam is too soft.
  • foams become soiled very quickly (by cerumen, etc.) and must be replaced frequently.
  • Such foams are still not optimal as earmolds.
  • the object of the present invention is to provide a method for producing an otoplastic or a customer-specific earmold based on foams, which can be carried out without the production of an impression and a negative and which does not have the disadvantages described above.
  • earmolds and earmolds can be produced in a particularly inexpensive way.
  • the wetted molded part can be adapted to the ear canal without complicated devices. It is simply positioned in the ear until it hardens after about ten minutes. This saves both time and money.
  • Different types of base bodies do not have to be present either, since a unitary base body (or the in-the-ear hearing aid itself) can be used for earmolds or the formwork lead for earmolds.
  • the adaptation to the ear canal is easier than in the prior art, since the material is bound to the molded part. If physiologically less well-tolerated materials are used to carry out the method, a protective cover can be used.
  • the otoplastics and earmolds produced are also particularly advantageous from a technical point of view.
  • the adjustment is particularly precise since the elastic molded part constantly presses against the walls of the auditory canal during the hardening of the mesh material.
  • the elasticity is only required temporarily because the molded part becomes a hard body in a few minutes. Accordingly, the molded part seals the ear canal particularly well, which in turn prevents feedback effects.
  • the otoplastics / ear molds produced in this way can be used for a long time without having to be replaced (in particular if the molded part is coated with a polymer).
  • FIG. 1 to 8 show the essential method steps for producing an otoplastic for an ITE hearing aid.
  • a support part, an elastic, porous molded part and a hardenable material are required.
  • the carrier part of this embodiment is a shell 1 of a module ITE hearing aid 2, for example of the Cosmea M type (Siemens AG).
  • the shell 1 consists of a dimensionally stable material and is adapted to the shape of the module 2.
  • the interior 3 of the shell 1 opens outwards at both ends of the shell 1.
  • the hearing aid housing can be used or serve a correspondingly shaped base body as a carrier part.
  • the ITE hearing aid module 2 includes all electrical components of the hearing aid.
  • a nozzle 9 At the opposite end of the hearing aid module 2 there is a nozzle 9 which forms the sound outlet opening.
  • the sound outlet 9 is part of the housing 10 (e.g. made of plastic) of the ITE hearing aid module 2.
  • the shell 1 is pushed over a base body 11.
  • the base body 11 is a series-produced unit stamp, the outer contour of which corresponds to the outer contour of the hearing device module 2. It comprises a stem 13 on its end face 12 and a socket 14 at the opposite end.
  • the molded part is an elastomer sleeve 15 with pores. It is preformed to the shape of the ear canal of a human ear, but has a slightly larger diameter.
  • the cuff 15 comprises a cutout 16 which is tailored to the shell 1.
  • the edges 17, 18 of the cuff 15 preferably narrow the cutout 16 at the open ends of the cuff 15 and thus hold the cuff 15 over the shell 1 and the base body 11 after pushing it over firmly in the recess 16.
  • the cuff 15 is an absorbent foam and, in this exemplary embodiment, has open pores on its surface 19.
  • the foam can be made from different materials.
  • a polyurethane elastomer or a foamed latex is particularly suitable.
  • the cuff 15 is initially elastic, preferably bulky, and comprises many small pores 20.
  • a hardenable material 21 e.g. a polymer.
  • the curable material 21 is preferably viscous. Resin material has proven to be particularly advantageous.
  • the base body 11 is first inserted into the interior 3 of the shell 1. Then the shell 1 together with the base body 11 is covered with the sleeve 15. For stabilization and sealing, a protective cover 22 is then screwed onto the socket 14 of the base body 11.
  • the cuff 15 is then immersed in the liquid container 23 until the pores 20 are wetted with hardenable material 21.
  • the cuff 15 must absorb at least as much hardenable material 21 that it can no longer deform after the hardenable material 21 has hardened.
  • the pores 20 should not be filled with hardenable material 21. If the foam 15 is particularly supple, the pores 20 need only be wetted with hardenable material 21. Therefore, under certain circumstances, as shown in FIG. 2, after immersing the cuff 15, excess material 21 should be pressed out of the cuff 15.
  • the cuff 15 can also be immersed in the material 21 in the compressed state, as a result of which the method step of FIG. 2 would be omitted.
  • a protective cover 24 is pulled over the wetted cuff 15 before insertion into the auditory canal.
  • the protective cover 24 should preferably also be elastic and adapt exactly to the outer contour of the sleeve 15.
  • Such a protective cover 24 could, for example, be made of latex (polyisoprene or polybutadiene).
  • the entire body consisting of base body 11, shell 1, sleeve 15, material 21, protective cover 22 and optionally protective cover 24, is finally positioned according to FIG. 4 in the auditory canal 25 of the ear 26 of the hearing impaired.
  • FIG. 5 shows the entire body 1, 11, 15, 21, 22, 24 a few minutes later.
  • the elastic cuff 15 has inflated again up to the walls of the auditory canal 25.
  • the hardenable material 21 hardens during this time. After about 10 to 15 minutes in the ear, the material 21 is completely hardened.
  • the entire body 1, 11, 15, 21, 22, 24 can then be removed from the auditory canal 25.
  • the protective cover 24 which may have been pulled open is then, as shown in FIG. 6, pulled off the cuff 15 and thrown away. There remains the base body 11 with shell 1 and hardened sleeve 15, which is permanently adapted to the shape of the auditory canal.
  • a coating 27 is applied to the cuff. Since the foam of the sleeve 15 is still open-pored, but has hardened, the surface 19 of the sleeve 15 is somewhat rough. The coating 27 smoothes the surface 19 so that the finished earmold is comfortable to wear. In addition, the coating 27 restores the accuracy of fit eliminated by the protective cover 24.
  • the coating 27 can be applied either by dipping or in another known manner. In any case, the coating 27 should be physiologically compatible.
  • a polymer e.g. a reaction resin based on epoxy or acrylate is e.g. well suited.
  • the coating 27 can e.g. can also be made in different colors to make the device more visually appealing.
  • the base body 11 is removed from the finished otoplastic 28.
  • the protective cover 22 is first unscrewed, as shown in FIG. 8. Then the base body 11 is replaced by the hearing aid module 2.
  • the shell 1 remains in the otoplastic 28.
  • a cerumen lid 29 with an internal thread 30 is screwed onto the socket 9 of the module 2.
  • the cerumen lid 29 comprises passage openings 31 for the sound.
  • FIG. 9 shows the otoplastic 28 produced according to the invention in longitudinal section.
  • a foam 15 not impregnated with hardenable material 21.
  • the foam in this area 32 is still soft and elastic. However, this foam can no longer expand outwards since it is completely surrounded by a second, hard area 33.
  • This second area 33 was adequately wetted with hardenable material 21 during the manufacturing process. After the material 21 hardened, the area 33 became so hard that it was no longer possible to deform the otoplastic 28.
  • the additional coating 27 adheres to the foam area 33 and gives the otoplastic a smooth surface.
  • FIGS. 10 to 12 A further process is shown in FIGS. 10 to 12. Although these method steps are also suitable for producing an otoplastic, an earmold for a BTE hearing aid is produced on the basis of this exemplary embodiment.
  • Fig. 10 shows a BTE hearing aid 34 and an earmold 35 based on foam with a Schal effetsschlauch 36.
  • the BTE hearing aid 34 comprises an inner shell 37, an outer shell 38, a battery charger 39 and a carrying hook 40.
  • a volume control 41 and a switch 42 protrude from the outer shell 38.
  • acoustic signals from the BTE hearing aid 34 can be conducted into the ear of the hearing impaired person via the ear fitting 35.
  • the earmold 35 like the otoplastic 28, should be adapted exactly to the auditory canal of the hearing impaired.
  • a curable material 21 ' is applied to a sleeve 15' made of foam by means of a brush 43 as a molded part.
  • This material 21 ' is, as in the previous embodiment, preferably a polymer and must be physiologically compatible, since no protective cover is used here.
  • the cuff 15 thus prepared is, as already explained with reference to FIGS. 4 and 5, inserted into the auditory canal of the hearing impaired for adaptation and curing.
  • the earmold 35 according to the invention thus results.
  • the 12 shows an earmold 35 designed according to the invention in longitudinal section.
  • the material 21 ' is hardly drawn into the foam 15' in this case. It only networks the surface 19 'of the sleeve 15'.
  • the cuff 15 ' need not necessarily be open-pore.
  • a sleeve 15 'with a closed surface can also be used.
  • the hardened material 21 ' has in the present case e.g. a smooth surface and therefore does not need to be coated further.
  • the sleeve 15' in the present case also includes a plurality of ventilation channels 44.
  • the carrier part can be designed as an outsourced module 45 of a BTE hearing aid 34 '.
  • the outsourced module 45 preferably comprises part of the electrical components of the hearing aid, in particular one or more electro-acoustic transducers (microphone 46 and / or receiver 47).
  • the formwork hose 36 must be replaced by an electrical line 48.

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  • 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)
  • Headphones And Earphones (AREA)
  • Prostheses (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
EP89100102A 1988-01-19 1989-01-04 Verfahren zur Herstellung einer Otoplastik oder eines Ohrpassstückes Expired - Lifetime EP0325107B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100102T ATE82662T1 (de) 1988-01-19 1989-01-04 Verfahren zur herstellung einer otoplastik oder eines ohrpassstueckes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3801392 1988-01-19
DE3801392 1988-01-19

Publications (2)

Publication Number Publication Date
EP0325107A1 EP0325107A1 (de) 1989-07-26
EP0325107B1 true EP0325107B1 (de) 1992-11-19

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EP89100102A Expired - Lifetime EP0325107B1 (de) 1988-01-19 1989-01-04 Verfahren zur Herstellung einer Otoplastik oder eines Ohrpassstückes

Country Status (4)

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US (1) US5008058A (ja)
EP (1) EP0325107B1 (ja)
AT (1) ATE82662T1 (ja)
DE (2) DE8816266U1 (ja)

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Also Published As

Publication number Publication date
DE58902726D1 (de) 1992-12-24
DE8816266U1 (de) 1989-04-13
ATE82662T1 (de) 1992-12-15
EP0325107A1 (de) 1989-07-26
US5008058A (en) 1991-04-16

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