EP2894880B1 - Dispositif d'antenne pour appareils auditifs - Google Patents

Dispositif d'antenne pour appareils auditifs Download PDF

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Publication number
EP2894880B1
EP2894880B1 EP15150094.9A EP15150094A EP2894880B1 EP 2894880 B1 EP2894880 B1 EP 2894880B1 EP 15150094 A EP15150094 A EP 15150094A EP 2894880 B1 EP2894880 B1 EP 2894880B1
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EP
European Patent Office
Prior art keywords
antenna
screen
receiver
hearing instrument
antenna device
Prior art date
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Active
Application number
EP15150094.9A
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German (de)
English (en)
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EP2894880A2 (fr
EP2894880A3 (fr
Inventor
Peter Nikles
Jürgen Reithinger
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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Publication of EP2894880A3 publication Critical patent/EP2894880A3/fr
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    • 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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • 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
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • 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
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/023—Completely in the canal [CIC] hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/025—In the ear hearing aids [ITE] hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/49—Reducing the effects of electromagnetic noise on the functioning of hearing aids, by, e.g. shielding, signal processing adaptation, selective (de)activation of electronic parts in hearing aid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/67—Implantable hearing aids or parts thereof not covered by H04R25/606

Definitions

  • the invention relates to an antenna device for hearing instruments, in particular for hearing instruments to be worn in the auditory canal.
  • Hearing instruments can be designed for example as hearing aids.
  • a hearing aid is used to supply a hearing-impaired person with acoustic ambient signals that are processed and amplified for compensation or therapy of the respective hearing impairment. It consists in principle of one or more input transducers, of a signal processing device, of an amplification device, and of an output transducer.
  • the input transducer is typically a sound receiver, e.g. a microphone, and / or an electromagnetic receiver, e.g. an induction coil.
  • the output transducer is usually as an electroacoustic transducer, z. As miniature speaker, or as an electromechanical transducer, z.
  • the output transducer generates output signals that are routed to the patient's ear and are intended to produce a hearing sensation in the patient.
  • the amplifier is usually integrated in the signal processing device.
  • the hearing aid is powered by a battery integrated into the hearing aid housing.
  • the essential components of a hearing aid are usually arranged on a printed circuit board as a circuit carrier or connected thereto.
  • Tinnitus maskers are used to treat tinnitus patients. They produce from the respective hearing impairment and depending on the principle of action also dependent on ambient noise acoustic output signals that can contribute to reducing the perception of annoying tinnitus or other ear noises.
  • Hearing instruments can also be designed as telephones, mobile phones, headsets, headphones, MP3 players or other telecommunications or consumer electronics systems.
  • hearing instrument is understood to mean both hearing aids and tinnitus maskers, comparable such devices, as well as telecommunications and consumer electronics systems.
  • Hearing instruments in particular hearing aids, are known in various basic types.
  • ITE hearing aids in-the-ear, also IDO or in-the-ear
  • a housing containing all functional components including microphone and receiver is at least partially carried in the ear canal.
  • CIC hearing aids are similar to ITE hearing aids, but are worn fully in the ear canal.
  • a housing with components such as battery and signal processing device is worn behind the ear and a flexible sound tube, also referred to as a tube, directs the acoustic output signals of a receiver from the housing to the ear canal, where often an ear piece is provided on the tube for reliable positioning of the tube end in the ear canal.
  • RIC-BTE hearing aids (receiver-in-canal behind-the-ear) are similar to BTE hearing aids, but the receiver is carried in the ear canal and instead of a sound tube, a flexible earpiece tube conducts electrical signals instead of acoustic signals to the receiver, which is at the front of the earpiece tube attached, usually in a reliable positioning in the ear canal serving ear piece.
  • RIC-BTE hearing aids are often used as so-called open-fit devices, in which the auditory canal remains open for the passage of sound and air to reduce the disturbing occlusion effect.
  • Deep-fit hearing aids are similar to CIC hearing aids. However, while CIC hearing aids are typically worn in a more distal (distal) section of the external auditory canal, deep-fit hearing aids continue to be advanced to the eardrum (proximal) and at least partially carried in the inner portion of the external ear canal.
  • the external portion of the ear canal is a skin-lined canal connecting the pinna to the eardrum. In the outer portion of the external auditory canal, which adjoins directly to the auricle, this channel is formed of elastic cartilage. In the inner portion of the external auditory canal, the canal is formed by the temporal bone and thus consists of bone.
  • the course of the ear canal between cartilaginous and bony sections is usually angled in a (second) kink and includes a different angle from person to person.
  • the bony portion of the ear canal is relatively sensitive to pressure and contact.
  • Deep-fit hearing aids are at least partially worn in the delicate bony section of the ear canal.
  • they When advancing into the bony portion of the ear canal, they must also pass the mentioned second kink, which can be difficult depending on the angle.
  • small diameter and tortuous shapes of the ear canal can further complicate advancement.
  • All types of hearing aids have in common that the smallest possible housing or designs are sought in order to increase the comfort, optionally to improve the implantability and possibly to reduce the visibility of the hearing aid for cosmetic reasons.
  • the aim of the smallest possible design also applies to most other hearing instruments.
  • Modern hearing instruments exchange control data via a usually inductive radio system.
  • the required transmission data rates for binaurally coupled hearing instruments are rising sharply, if moreover acoustic information for audiological algorithms (eg beamforming, sidelook, etc.).
  • a higher data rate requires a larger bandwidth.
  • One of the main factors influencing the sensitivity of the transmission system to interfering signals is precisely the bandwidth.
  • the antenna is arranged on or partially in the so-called faceplate (the wall of the hearing instrument facing away from the eardrum).
  • the antenna is then typically in the immediate vicinity of the so-called hybrid (hybrid integrated circuit carrier) and the receiver.
  • hybrid hybrid integrated circuit carrier
  • the arrangement of the antenna relative to receiver and hybrid is crucial to the performance of the transmission system. Due to the high packing density, a mutual shielding of the components is necessary.
  • the hybrid is typically wrapped with a shield box for this purpose.
  • the receiver gets a screen foil or is specially designed so that it is magnetically tight.
  • an antenna which comprises a hollow core of a magnetically permeable material.
  • the hollow core has an axial passage.
  • Axial trimgang is in particular a tube arranged, which is connected to the sound outlet of a receiver.
  • the distance between the bridged distance is shortened for the same antenna and the same energy requirement but increased bandwidth.
  • this is typically only possible by increasing the antenna volume.
  • One way of improving the transmission link is to design the antenna so that a volume is used that would otherwise be idle broke. This results in an enlargement of the antenna and thus an increase in efficiency, without the need to additionally create more space in the hearing instrument.
  • the object of the invention is to specify a hearing instrument, in particular an IDO hearing instrument, which specifies a transmission bandwidth-improved data transmission system with no or only insignificantly increased space and energy requirements.
  • the invention solves this problem by an antenna device and by a hearing instrument with the independent claims.
  • a basic idea of the invention consists in an antenna device for a hearing instrument comprising an antenna arrangement with a coil core of magnetically permeable material which has a preferred transmission and reception spatial direction, and a further electrical hearing instrument component, the electromagnetic interference radiation emitted, wherein between the antenna arrangement and the other hearing instrument component, an at least partially planar screen of magnetically permeable material is arranged, and wherein the screen is arranged transversely to the longitudinal axis of the antenna array with a distance of 50 to 150 micrometers to the spool core.
  • the optimum distance results on the one hand from the fact that with increasing distance the signal-to-noise ratio of the antenna initially increases and then decreases again, with a maximum of the order of 100 micrometers.
  • the screening effect between the antenna and the further hearing aid component initially increases with increasing distance, and then passes into saturation at a distance of the order of magnitude of 100 micrometers.
  • a minimum distance should be maintained because of the overall size.
  • transverse is meant an orientation perpendicular or approximately perpendicular or in an angular range of a few degrees around 90 ° to each other.
  • a certain tilt between the antenna and the screen are allowed, for example, in an angular range of 45 ° around the transverse orientation.
  • a tilting relative to the transverse orientation disadvantageously reduces the sensitivity of the antenna.
  • the orientation refers to the longitudinal axis of the antenna arrangement and the area given by the screen.
  • the screen can either be a plate, or a U-shaped angled plate, or a kind of cup, in which the other hearing instrument component can be inserted.
  • the two-dimensional shield effects a shielding of the electromagnetic fields and thereby already reduces the mutual interference coupling. High magnetic permeability enhances the shielding effect.
  • the screen causes due to the high permeability of the material in the end, as it were an extension of the antenna or an increase in their efficiency. This raises a higher Transmission field strength and a higher reception sensitivity.
  • the material of the coil core has a lower magnetic permeability than the material of the screen.
  • the higher magnetic permeability of the screen material enhances the screening effect without having a significant negative impact on the performance of the antenna due to the typically higher loss angle of the highly permeable material.
  • the screen consists of mu-metal foil.
  • a further advantageous development of the basic idea is that the screen is adhesively bonded to the antenna arrangement. As a result, a particularly uncomplicated installation is given.
  • a further advantageous development of the basic concept consists in that the further electrical hearing instrument component emits the electromagnetic interference radiation predominantly in an interference radiation spatial direction, and that the antenna arrangement and the further hearing instrument component are arranged transversely to one another in such a way that interfering radiation is coupled into the interference radiation Antenna arrangement is reduced.
  • the radiation intensity of the interfering radiation in the Störstrahlungs spatial direction is higher than in any other spatial direction.
  • the lowest coupling results when the two spatial directions are oriented perpendicular to each other, so that with transverse orientation perpendicular or approximately perpendicular or in an angular range of at most 45 ° greater or less than 90 ° to each other.
  • the orientation refers to the respective magnetic field, so that the respective fields are oriented transversely to each other and the respective magnetic fields as well.
  • the main directions of the fields are not readily determinable theoretically, so that the main direction is not clearly established.
  • a small tilt relative to the transverse orientation due to the asymmetry of the fields caused thereby can have an advantageous effect on the shielding between component and antenna.
  • the optimal orientation of the component results theoretically at 90 °, but must be determined depending on the component and its actual field in each case. In principle, a tilting of the component is less disadvantageous or even advantageous in comparison to a tilting of the screen, so that larger tilting of the component would generally be provided independently of the screen.
  • the further hearing instrument component may be a receiver or another, in particular inductive or electromagnetic radiation emitting component.
  • the antenna arrangement comprises a coil antenna
  • the further hearing instrument component comprises a coil arrangement which emits the interference radiation
  • the coil antenna and the coil arrangement with respect to their respective longitudinal direction transversely to each other that is perpendicular or approximately perpendicular or in an angular range around 90 °, are oriented.
  • the magnetic field of a coil antenna has a pronounced spatial orientation, so that a significant reduction of the mutual interference coupling is achieved by the orientation transversely to each other.
  • a further advantageous development is that the further hearing aid component is arranged on the screen.
  • the arrangement of the hearing instrument component so close to the antenna arrangement with a reasonably low mutual interference coupling is made possible in particular by the mutual shielding. This results in a space-saving arrangement, which is also suitable for the pre-assembly of the antenna assembly and the other hearing instrument component.
  • a further advantageous development is that the further hearing aid component is attached to the screen.
  • the attachment of the hearing instrument component to the screen together with the antenna assembly forms a preassembled module. This simplifies the further assembly or production of the hearing instrument.
  • a further advantageous development consists in that the screen surrounds the further hearing instrument component in the direction away from the antenna core at least in a region of its circumference.
  • a further advantageous development consists in that the further hearing instrument component is a receiver and that the coil core and the shield have a sound channel passing through the coil antenna.
  • both components can be placed as deep as possible in the ear canal to save space.
  • an acoustically advantageous placement of the receiver is achieved as close to the eardrum, while the coil antenna is reached close to the IDO hearing instrument of the other (right or left) ear of the user, which positively affects the quality of mutual data transmission. It has In practice, it has been shown that the sound channel does not result in any significant deterioration of the antenna properties in the relevant field strength range.
  • the receiver is an electrodynamic transducer and thus the receiver contains a magnetic circuit which has an excitation winding.
  • the receiver is typically fed with a pulse density modulated signal having spectral components in the frequency band of the data transmission system.
  • This control is very energy efficient and is therefore used in hearing instruments.
  • the spectral components can not be avoided without a strong increase in the energy requirement of the hearing instrument.
  • the receiver is the largest consumer in the hearing instrument.
  • the energy requirements of the appreciatedtragungssytems is very small and, accordingly, its receiving sensitivity to magnetic interferers is quite large.
  • the magnetic circuit and thus also the receiver winding is oriented perpendicularly or approximately perpendicular or in an angular range around 90 ° to the antenna. This greatly reduces the coupling of the receiver winding to the antenna.
  • the antenna can thus be placed much closer to the receiver.
  • the combination of the transversal receiver and the antenna is optimized for the tapered shell contour at the tip of the IDO hearing instrument, minimizing the installation length.
  • the placement at the tip of the IDO hearing instrument increases the fitting rate and reduces the size of the hearing instrument.
  • more freedom in the positioning of the faceplate is possible because the antenna is no longer located at or near the faceplate.
  • This also eliminates the consideration of physical Restrictions, such as magnetic field disturbances, that are required when placed in the area of the faceplate.
  • the interference coupling to the antenna can be reduced by the additional shielding between antenna and receiver.
  • the shield covers preferably (best space / performance ratio) the whole area of the receiver.
  • the combination of shield and coil core not only serves to shield, but also increases the sensitivity of the antenna. One could therefore reduce the antenna length due to the effect of the screen even with constant sensitivity.
  • Another advantage of the shield in the common arrangement with the antenna is that with the same inductance, the required number of turns can be reduced, so that in turn the diameter of the single turn, typically enameled wire, can be increased. Due to the low number of turns and the larger wire diameter advantageously the electrical winding resistance is reduced, whereby the antenna quality is increased.
  • the screen can also extend around the edges of the receiver. Therefor All four edges of the receiver and their permutations are conceivable and bring about a greater or lesser amplification of the decoupling effect.
  • the receiver could be enveloped laterally or even completely in order to further improve the shielding effect. This further improves the antenna sensitivity and quality.
  • the field line concentration and thus the field strength of the antenna is reduced by the screen at the exit to the receiver.
  • the low field strength causes in the metal surface of the receiver less eddy currents, thereby increasing the quality of the antenna. Therefore, with the same quality, the distance between the antenna and the receiver can be shortened. This effect is reinforced by the hole in the ferrite, as the field lines are concentrated at the edge in the flange area.
  • the coil core has a sound channel and the screen has a sound opening, and that the sound channel and the sound opening are arranged in alignment so that a continuous sound channel is formed.
  • the sound channel makes it possible, in particular, for a receiver to be provided as a further hearing instrument component.
  • the acoustic output signal of the receiver can then be led directly into the sound channel.
  • the acoustic output signal of a receiver arranged at another location can be passed through the sound channel. This makes it particularly unnecessary to provide a separate sound channel, so that further space is avoided.
  • a further advantageous development is that the inner wall of the sound channel and / or the side facing away from the coil core of the screen is covered with sound-absorbing material.
  • the sound insulation causes a favorable for the use of the receiver vibration decoupling.
  • the distance caused by the sound insulation between the receiver and the screen causes the decoupling of the screen and receiver in a distance required to increase the antenna quality, in which the transmission of the antenna field into the receiver is reduced by the distance. The farther the receiver is enclosed by the screen, the lower the distance can be selected without a reduction of the antenna quality.
  • a basic idea of the invention is to design the antenna so that it can be placed closer to another hearing instrument component without losing performance.
  • an antenna device is specified, which integrates various functions, such as shielding, contacting, etc ... in a small space.
  • the arrangement makes it possible in particular to manage without additional space and without additional components.
  • the antenna can additionally be placed very close to the hearing instrument component and combined as an integrated module. This simplifies installation.
  • the arrangement of the receiver to the antenna is fixed and there is only one instead of two components. There are no separate steps for the installation of the antenna required. There are also no additional components for a separate installation necessary.
  • the antenna module is a part that can be pre-assembled automatically before production.
  • FIG. 1 An IDO hearing instrument of the prior art is schematically illustrated.
  • the IDO hearing instrument 3 is inserted into the external auditory canal of the hearing instrument wearer. It is located partly in the outer cartilaginous part 1 of the ear canal, and is partially advanced to the bony part of the ear canal. It is therefore a CIC hearing instrument, depending on how far the hearing instrument is inserted into the ear canal, it could also be a deep-fit hearing instrument.
  • a receiver 4 is placed at the end facing the eardrum. This emits acoustic signals to the eardrum via a sound channel 7.
  • a hybrid circuit carrier 8 which comprises a signal processing device, not shown, as well as an amplifier for generating control signals for the receiver 4.
  • An antenna 6 is also disposed on the faceplate 5 and oriented so that it is oriented in the direction of the opposite, not darg Crowen the ear of the hearing instrument wearer. The antenna 6 is used for data transmission between the two binaural hearing instruments of the hearing instrument wearer, wherein only one of the two hearing instruments is shown.
  • the antenna is arranged relatively close to the other electronic components of the hearing instrument 3, so that electromagnetic interference signals from these can couple into the antenna 6.
  • Such interference signals are emitted in particular by the receiver 4, which has an inductive receiver coil which serves to convert electrical signals into acoustic signals.
  • the interference mentioned reduce the performance of the data transmission system sensitive, so that a high bandwidth with low energy consumption is limited achievable.
  • FIG. 2 an IDO hearing instrument with antenna device is shown schematically.
  • the housing 19 of the IDO hearing instrument 13 tapers on the side of the eardrum to support.
  • a sound channel 17 on this side serves to deliver acoustic signals to the eardrum of the wearer.
  • a hybrid circuit substrate 18 (dashed lines) inside the hearing instrument 13 and its housing 19 is arranged.
  • the hybrid circuit carrier 18 comprises a signal processing device and an amplifying device, which controls the likewise arranged in the interior of the housing 19 Receiver 14.
  • the receiver 14 generates acoustic output signals that are output via the sound channel 17.
  • the receiver 14 is oriented transversely to the longitudinal axis of the hearing instrument 13. Between Receiver 14 and the eardrum oriented, tapered end of the hearing instrument 13 is the antenna 16 for data transmission between the two binaural hearing instruments of the hearing instrument wearer.
  • the antenna 16 is oriented in the longitudinal direction of the hearing instrument 13 and thus aligned transversely to the receiver 14. It is separated from Receiver 14 by a screen 26.
  • the screen is arranged transversely to the antenna 16 and at a small distance from its (not shown) spool core. It has a sound opening 39, which is arranged in alignment with the sound channel 17. The distance is between 50 and 150 microns.
  • the transverse orientation of the receiver 14 causes a space-saving arrangement of receivers 14 and antenna 16, whose overall length is reduced by the transverse arrangement of the receiver 14.
  • the transverse arrangement of the receiver 14 results in a better utilization of space in the tapered part of the housing 19.
  • the space available in the tapered tip of the housing 19 is thus better utilized than would be the case with a longitudinally arranged receiver.
  • a bent preformed sound tube can be connected to the antenna 16 on the output side, which leads to the sound output.
  • Fig. 3 the antenna device is again shown schematically.
  • the sound channel 17 is located within the antenna 16, and passes therethrough to the receiver 14.
  • the receiver 14 is oriented as described above transverse to the antenna 16 and to the longitudinal direction of the IDO hearing instrument.
  • the screen 26 is arranged between the (not shown) coil core of the antenna 16 and the Reveicer 14 at a distance of 50 to 150 micrometers to the bobbin.
  • the distance may be effected, for example, by a preformed part on which the screen 26 and the antenna 16 are mounted; the distance can also be effected in a particularly simple manner, that screen 26 and antenna 16 by means an adhesive layer of suitable thickness are glued together.
  • a longitudinally arranged receiver 20 is shown by dashed lines.
  • the dashed arrangement of the receiver 20 illustrates that the overall length increases with longitudinal arrangement of the receiver 20, and that at the same time results in no tapered contour of the arrangement. As explained above, it is illustrated that with longitudinal arrangement of the receiver 20, the space in the tapered tip of the hearing instrument 13 can not be exploited equally well.
  • FIG. 4 An antenna receiver module is shown in perspective.
  • the receiver 14 is, as explained above, oriented transversely to the antenna 16.
  • the antenna 16 is disposed on a spool core 22 made of permeable material.
  • the permeable coil core 22 thus serves in the usual way to increase the antenna surface or sensitivity.
  • the screen 26 is arranged (the distance is not visible in the figure).
  • the screen 26 is predominantly planar in shape and oriented transversely to the orientation of the antenna 16, ie parallel to the orientation of the receiver 14.
  • the surface of the screen 26 is dimensioned so that the receiver 14 completely or almost completely over the entire screen 26 facing surface by the shield 26 is shielded from the antenna or, conversely, the antenna 16 is shielded from the receiver 14.
  • the sound channel 17 extends through the coil core 22 and through the screen 26 to the receiver 14.
  • the coil core 22 is covered on the inside by a tube 21 formed as a sound-insulating or vibration-damping material.
  • the spool core 22 need not be covered on the inside vibration-damping and would then serve as a non-insulated sound guide. In order to a larger cross section of the sound channel can be achieved.
  • the tube 21 surrounds the sound channel 17 from the antenna-side output to the receiver 14 and is formed there parallel to the screen 26 areally.
  • the receiver 14 is mounted on the surface-shaped part of the tube 21 and thus also vibration isolated. Round extensions of the sound or vibration damping material are used in addition to the device integrated vibration-decoupled suspension of the device in the housing of the hearing instrument.
  • the coil core 22 forms, together with the tube 21, the antenna 16, the screen 26 and the receiver 14, an antenna receiver module.
  • the tube 21 may be shaped such that, in arrangements of the shield 26 and the spool core 22 on the tube 21, the above-mentioned distance between the shield 26 and the spool core 22 results.
  • the module can be pre-installed or pre-assembled in the hearing instrument. The pre-assembly of the antenna receiver module on the tube 21 reduces the assembly effort in the manufacture of the hearing instrument and thus simplifies the manufacturing process.
  • Fig. 5 is shown one of the foregoing representation similar embodiment.
  • the same reference numerals are used for the same components and reference is made to the preceding explanations.
  • the coil core 22 together with the antenna 16 is not arranged in the middle of the screen 26, but shifted (in the illustration above). This may serve to adapt the outer shape of antenna 16 and receiver 14 to the mounting space available in a hearing instrument.
  • Fig. 6 another embodiment similar to the previous illustrations is shown. Again, like reference numerals are used and reference is made to the preceding explanations.
  • the receiver 14 is tilted relative to the screen 26. Again, this may be due to customization serve the mounting space available in a hearing instrument.
  • the shielding effect of the screen 26 may vary at low tilt angles of the receiver 14, under favorable circumstances even be improved with respect to an exactly vertical arrangement.
  • Fig. 7 the field line profile of a receiver coil operating receiver is shown schematically and greatly simplified.
  • a receiver coil 23 is arranged axially, that is, oriented in the longitudinal direction. It can be seen that the receiver coil 23 generates a strongly compressed (magnetic) field in the axial direction, while it generates a relatively weak (magnetic) field in the radial direction, that is, in the figure to the right and left.
  • the field of the receiver 23 is greatly influenced and more complexly shaped by its housing and possibly one or more further receiver coils and magnetic components.
  • the magnetic field generated by the receiver 14 is more pronounced in its longitudinal direction than in its transverse direction.
  • the arrangement explained above in which the antenna susceptible to electromagnetic interference is not arranged longitudinally but transversely to the receiver, already effects a clear decoupling of the electromagnetic signals of the receiver 14 from said antenna.
  • the improved decoupling is thus achieved in that the antenna is arranged both laterally from and transversely to the receiver 14.
  • Fig. 8 the field line profile of the receiver is shown with shielding.
  • the receiver 14 is arranged in the illustration on the left on the above-explained screen 26 of the permeable coil core 22.
  • the spool core 22 which is slightly spaced apart from this, as described above, carries the antenna 16.
  • the illustrated field line profile illustrates the shielding of the antenna 16 from the receiver 14 or from the signals of the receiver coil 23.
  • the field lines running in the direction of the antenna 16 are deformed by the shield 26 and extend through it.
  • the field line density in the screen 26 is thus increased while simultaneously reducing the field line density beyond the screen 26.
  • the strength of the (magnetic) field generated by the receiver coil 23 at the location of the coil 16 is reduced considerably.
  • interference couplings of receiver signals in the antenna 16 are considerably reduced.
  • FIG. 9 the above-described sound-insulating tube is shown separately.
  • the tube 21 is traversed longitudinally from the sound channel.
  • a coil section 24 is provided to receive the previously explained coil core 22.
  • the coil core 22 is arranged around the coil section 24, possibly also around the further longitudinal course of the tube 21 around.
  • a screen section 25 is provided to receive the screen. In this case, the screen is placed on one side of the screen section 25, while a receiver is arranged on the opposite side of the screen section 25.
  • the illustrated tube 21 is made entirely of sound insulating material, for example in a conventional manner from Viton.
  • FIG. 10 a further embodiment of the antenna receiver module is shown.
  • a screen 37 is arranged on one side as explained above.
  • An antenna 36 is wound on the spool core 32.
  • the screen 37 surrounds the receiver 34 arranged there, at least in the region shown in the figure above and below.
  • the screen 37 is designed there cup-shaped, so that the receiver 34 surrounded by the screen 37 at least in an area of the screen circumference in the direction away from the antenna 36 direction.
  • a particularly good shielding results when the screen 37 surrounds the receiver 34 on all sides.
  • a further improvement of the shielding can be achieved in that the screen 37 encloses the receiver 34 completely and not only laterally. This results in a further improvement of the antenna, which can either be used to increase the bandwidth, or to make a shortening of the antenna while maintaining performance.
  • the coil core 32 passes through a sound channel 17 which is covered by the continuous tube 31 with sound-absorbing material.
  • the sound channel 17 is arranged in alignment with the sound opening 40 of the screen 37.
  • the sound opening 40 and the sound channel 17 thus together form a continuous sound channel.
  • the tube 31 is also flat or cup-shaped in the area of the screen 37 and receives the receiver 34 in a vibration-damping manner.
  • the receiver 34 is attached to the tube 31.
  • the illustrated receiver antenna module can be pre-assembled, so that the further assembly and manufacture of the hearing instrument is considerably simplified.
  • Fig. 11 the course of the signal-to-noise ratio (SNR) of the antenna signal is shown as a function of the above-explained distance between the screen and the coil core of the antenna. It can be seen that the signal-to-noise ratio has a maximum at about 100 to 200 microns distance. From the course it follows that a certain minimum distance between the screen and the coil core is advantageous.
  • SNR signal-to-noise ratio
  • FIG. 12 the attenuation of the interfering signals of the receiver for the antenna signal in dependence on the above-explained distance between the screen and the coil core of the antenna is shown. It can be seen that the attenuation converges to a maximum attenuation at about 100 microns distance. From the course it follows that a certain minimum distance between the screen and the coil core is advantageous.
  • a distance between the screen and the coil core of about 50 to 150 micrometers, which is advantageous for antenna properties and size, results. It can also be seen from the diagrams that the narrower range of about 75 to 100 micrometers is particularly advantageous. It is obvious that different values can result after individual design of antenna, coil core, screen and receiver. In the case of constellations typical for hearing instruments, however, it can be assumed that they are within the specified value ranges.
  • Fig. 13 the magnetic field of the antenna in and around the spool core 22 is shown schematically.
  • the shield 26 spaced from the coil core 22 causes a recognizable compression of the magnetic field on the side of the coil core 22 and the antenna. Due to the permeable properties of the receiver 14, which is itself permeable, a part of the magnetic field is also passed through it, which advantageously even causes a theoretical extension of the antenna and thus contributes to improving the sensitivity.
  • the deformation of the field line through the screen 26 results in that the field lines run longer overall in the coil core 22 and screen 26 together. This advantageously results in an increase in sensitivity.
  • screen 26 and receiver 14 sets a reduction in the field lines coming from the antenna, because the field lines amplified at the edge of the screen 26 and not approximately between screen 26 and receiver 14 exit. At the same time the screen has no adverse effect on the stray field.
  • FIG. 14 the magnetic field of the receiver 14 is shown schematically.
  • the screen 26, which is at a distance from the coil core 22, has a clear effect of shielding the magnetic field of the receiver 14 for the antenna or the coil core 22. It can be seen that part of the magnetic field penetrates the screen 26, but only the smallest part thereof passes into the spool core 22 over the distance.
  • the field lines extending in the direction of the antenna are deformed by the screen 26 and pass therethrough.
  • the field line density in the screen 26 is thus increased while simultaneously reducing the field line density beyond the screen 26.
  • the strength of the (magnetic) field generated by the receiver coil at the location of the coil is significantly reduced. This significantly reduces noise interference from receiver signals into the antenna.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Support Of Aerials (AREA)

Claims (12)

  1. Dispositif d'antenne destiné à un appareil auditif (13), comprenant un système d'antenne (16, 36) comportant un noyau de bobine (22, 32) constitué de matériau magnétiquement perméable, qui présente une direction spatiale d'émission et de réception préférée, et un autre composant d'appareil auditif électrique, qui émet un rayonnement électromagnétique parasite, dans lequel un écran au moins partiellement plat (26, 37) constitué de matériau magnétiquement perméable est disposé entre le système d'antenne (16, 36) et l'autre composant d'appareil auditif,
    caractérisé en ce que l'écran (26, 37) est disposé transversalement à l'axe longitudinal du système d'antenne (16, 36), et en ce que l'écran (26, 37) est disposé à une distance de 50 à 150 micromètres du noyau de bobine (22, 32), de préférence de 75 à 100 micromètres.
  2. Dispositif d'antenne selon la revendication 1,
    caractérisé en ce que le matériau du noyau de bobine (22, 32) a une perméabilité magnétique inférieure à celle du matériau de l'écran (26, 37).
  3. Dispositif d'antenne selon la revendication 2,
    caractérisé en ce que l'écran (26, 37) est constitué d'une feuille de mu-métal.
  4. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'écran (26, 37) est collé au système d'antenne (16, 36).
  5. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'autre composant d'appareil auditif électrique émet un rayonnement électromagnétique parasite principalement dans une direction spatiale de rayonnement parasite et en ce que le système d'antenne (16, 36) et l'autre composant d'appareil auditif sont disposés transversalement l'un à l'autre de manière à réduire une injection de rayonnement parasite dans le système d'antenne (16, 36).
  6. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le système d'antenne (16, 36) comprend une antenne à bobine, en ce que l'autre composant d'appareil auditif comprend un système de bobines (23) qui émet le rayonnement parasite et en ce que l'antenne à bobine et le système de bobines (23) sont orientés transversalement l'un à l'autre par rapport à leur direction longitudinale respective.
  7. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'autre composant d'appareil auditif est disposé sur l'écran (26, 37).
  8. Dispositif d'antenne selon la revendication 7,
    caractérisé en ce que l'autre composant d'appareil auditif est fixé à l'écran (26, 37).
  9. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'écran (26, 37) entoure, dans au moins une région de sa circonférence, l'autre composant d'appareil auditif, dans la direction opposée au système d'antenne (16, 36).
  10. Dispositif d'antenne selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le noyau de bobine (22, 32) comporte un canal acoustique (17) et en ce que l'écran (26, 37) comporte une ouverture acoustique (26), et en ce que le canal acoustique (17) et l'ouverture acoustique (26) sont disposés en alignement de manière à former un canal acoustique continu.
  11. Dispositif d'antenne selon la revendication 10,
    caractérisé en ce que la paroi intérieure du canal acoustique (17) et/ou la face de l'écran (26, 37) opposée au noyau de bobine (22, 32) est/sont revêtue(s) de matériau d'amortissement acoustique.
  12. Appareil auditif comportant un dispositif d'antenne selon l'une quelconque des revendications précédentes.
EP15150094.9A 2014-01-14 2015-01-05 Dispositif d'antenne pour appareils auditifs Active EP2894880B1 (fr)

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JP (1) JP6479482B2 (fr)
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EP2992688B1 (fr) * 2013-05-01 2018-10-17 Starkey Laboratories, Inc. Performance améliorée d'antennes pour des appareils auditifs sans fil
US10091594B2 (en) 2014-07-29 2018-10-02 Cochlear Limited Bone conduction magnetic retention system
EP3269155B1 (fr) * 2015-03-13 2019-01-02 Sivantos Pte. Ltd. Système d'aide auditive binaurale
US10130807B2 (en) 2015-06-12 2018-11-20 Cochlear Limited Magnet management MRI compatibility
US20160381473A1 (en) 2015-06-26 2016-12-29 Johan Gustafsson Magnetic retention device
US10917730B2 (en) 2015-09-14 2021-02-09 Cochlear Limited Retention magnet system for medical device
DE102016202658A1 (de) * 2016-02-22 2017-08-24 Sivantos Pte. Ltd. Lautsprechermodul für ein Hörgerät und Hörgerät
US11595768B2 (en) 2016-12-02 2023-02-28 Cochlear Limited Retention force increasing components
DE102017207528A1 (de) * 2017-05-04 2018-11-08 Sivantos Pte. Ltd. Modul zum Einbau in ein Hörhilfegerät
DE102017210447A1 (de) * 2017-06-21 2018-12-27 Sivantos Pte. Ltd. Hörgerät
DE102018209189A1 (de) * 2018-06-08 2019-12-12 Sivantos Pte. Ltd. Antenne sowie Gerät mit einer solchen Antenne
DE102019217861B3 (de) 2019-11-20 2021-05-20 Sivantos Pte. Ltd. Hörgerät
EP3836568A1 (fr) * 2019-12-10 2021-06-16 Oticon Medical A/S Dispositif d'aide auditive à conduction osseuse avec antenne planaire et conducteurs arrangés entre les couches de l'antenne
DE102023202591A1 (de) 2023-03-22 2024-09-26 Sivantos Pte. Ltd. Lautsprechersystem für eine im Ohr zu tragende Hörvorrichtung

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CN104779439B (zh) 2019-09-17
US20150201290A1 (en) 2015-07-16
JP2015133703A (ja) 2015-07-23
DE102014200524A1 (de) 2015-07-16
DK2894880T3 (da) 2017-07-03
EP2894880A2 (fr) 2015-07-15
JP6479482B2 (ja) 2019-03-06
AU2015200110A1 (en) 2015-07-30
EP2894880A3 (fr) 2015-07-29
AU2015200110B2 (en) 2018-07-26
US9253582B2 (en) 2016-02-02
CN104779439A (zh) 2015-07-15

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