EP1617706A2 - Ecouteur électromagnétique sans radiation - Google Patents

Ecouteur électromagnétique sans radiation Download PDF

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Publication number
EP1617706A2
EP1617706A2 EP05106154A EP05106154A EP1617706A2 EP 1617706 A2 EP1617706 A2 EP 1617706A2 EP 05106154 A EP05106154 A EP 05106154A EP 05106154 A EP05106154 A EP 05106154A EP 1617706 A2 EP1617706 A2 EP 1617706A2
Authority
EP
European Patent Office
Prior art keywords
coil
housing
electromagnetic
connection lines
guided
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05106154A
Other languages
German (de)
English (en)
Other versions
EP1617706A3 (fr
EP1617706B1 (fr
Inventor
Kunibert Husung
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 Audiologische 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 Audiologische Technik GmbH filed Critical Siemens Audiologische Technik GmbH
Publication of EP1617706A2 publication Critical patent/EP1617706A2/fr
Publication of EP1617706A3 publication Critical patent/EP1617706A3/fr
Application granted granted Critical
Publication of EP1617706B1 publication Critical patent/EP1617706B1/fr
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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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

Definitions

  • the invention relates to an electromagnetic receiver having a housing in which a coil through which a field current flows and a diaphragm are arranged such that the diaphragm can be set into vibration as a result of the excitation current, internal connection lines leading to electrical connections on the coil ends within the housing Housing are guided.
  • electromagnetic receivers are used to convert electrical signals into acoustic signals.
  • hearing aids because of the required miniaturization of these devices has the problem that emanating from the listener electromagnetic stray fields disturb other components of the hearing aid.
  • the reception can be disturbed by means of an induction or telephone or hearing coil in a hearing aid by the stray field generated by a listener.
  • Measures are known from the prior art in order to stem the stray field emanating from a receiver.
  • an induction coil is arranged in principle with the greatest possible distance from the listener in the housing of a hearing aid.
  • these known shielding plates can only influence part of the stray fields. As complete as possible shielding the listener is not possible.
  • a cone speaker with a voice coil is known, which is traversed by a sound-frequency alternating current i.
  • the cone loudspeaker has a membrane which is arranged such that the membrane due to the excitation current i into vibrations is displaceable. Furthermore, the cone speaker has strands that supply the alternating current i of the voice coil.
  • internal connecting leads are led from the coil ends of the voice coil to electrical connections on the basket.
  • a hearing aid with a receiver for sound emission and with an induction coil for inductive recording of signals and with a compensation inductance for generating a compensation field is known, wherein the compensation inductance in the signal line of the listener so between the induction coil and the listener is positioned that its compensation field is directed against the magnetic field of the listener during operation of the induction coil and reduces a coupling between the earpiece and the induction coil.
  • the object of the present invention is to reduce the outgoing radiation from a listener.
  • an electromagnetic receiver having a housing in which a coil through which an excitation current flows and a diaphragm are arranged in such a way that the diaphragm can be set into vibration as a result of the exciter current, wherein internal connection lines to electrical connections within the housing from the coil ends led to the housing, achieved in that the internal connection lines are guided at least substantially close together from the coil ends to the electrical terminals.
  • the parasitic magnetic fields generated in the receiver are reduced in that the close coexistence of the connection lines makes it possible to use the physical properties of a so-called double line, in which both conductors flow in opposite directions from the same current. So far, efforts have been made to keep the connection lines in the receiver as short as possible in order to avoid stray fields.
  • the connecting wires are twisted in the region in which they are guided close together. This means that the distance between the connecting cables does not change even during vibrations and that the generated stray field is further reduced.
  • Electromagnetic handset according to the invention are ideally suited for use in hearing aids, since there due to the desired miniaturization of these devices stray fields very strongly affect adjacent components. Overall, thus, the quality of hearing aids can be increased and the maximum possible system gain can be increased in such devices. Stray field handsets lead to shorter development times for high-performance devices, as instabilities in listening coil operation are avoided. In addition, the wireless RF signal transmission in hearing aid systems is less susceptible to interference, since high-frequency emissions of clocked power amplifiers are reduced.
  • Fig. 1 shows the components of an electromagnetic receiver according to the prior art in a perspective view.
  • the electromagnetic earphone comprises a housing having a housing bottom 2A and a lid 2B.
  • a field winding in the form of a coil 3.
  • the coil 3 is provided at the coil ends 3A and 3B with connecting lines 5A and 5B, which are guided in a straight line and thus with the shortest possible length through the housing to the outside.
  • To form a magnetic circuit are in the housing further comprises an iron core 7 with air gap, two magnets 8A and 8B and a magnetic field feedback 9, which has a tongue 10 which is guided in the assembled state of the receiver 1 through the coil 3 therethrough.
  • An exciting current flowing through the coil 3 causes the tongue 10 to vibrate.
  • a drive pin 11 which is placed on the end of the tongue 10, the mechanical vibrations are transmitted to a membrane 4.
  • the sound generated thereby leaves the listener through a slot 2C in the housing cover 2B and a sound outlet 12.
  • For electrical connection of the handset is located on an outer side of the housing base 2A a provided with electrical contacts connection plate 13, with the two leads 5A and 5B soldered are.
  • FIG. 2 shows a plan view of the open handset according to the prior art according to FIG. 1.
  • the membrane 4 is removed in addition to the housing cover 2B.
  • the exciter winding 3, the iron core 7 and the drive pin 11 in the interior of the housing 2 of the electromagnetic receiver 1 are visible.
  • the coil 3 is soldered to the leads 5A and 5B.
  • the connection lines 5A and 5B are kept as short as possible and guided past the iron core 7 through the housing 2 to the connection plate 13 with the terminals (contacts) 6A and 6B.
  • the connecting lines 5A and 5B thereby form a current loop from an area that corresponds to approx. 80% of the listener cover area.
  • the listener cover 2B does not ideally close the housing 2, the parasitic magnetic fields generated by the leads 5A and 5B are radiated to the outside. Although the useful field in the magnetic circuit of the receiver 2 is stronger by a few orders of magnitude, it is guided cleanly in the iron core. The air gap is hardly significant because it is very narrow.
  • connection lines 5A and 5B are guided as close as possible to each other from the coil ends 3A and 3B to the connections 6A and 6B.
  • a greater line length is accepted as a whole, it is crucial that the parasitic stray field generated by the connecting lines 5A and 5B is kept as low as possible by the special cable routing.
  • the magnetic fields of the two connecting lines 5A and 5B largely compensate each other.
  • connection lines 5A and 5B are twisted together at least in a partial area. This ensures that the two connection lines 5A and 5B remain close together, even in the case of mechanical vibrations, and that the stray parasitic field generated by the connection lines 5A and 5B is kept as low as possible.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Telephone Set Structure (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP05106154A 2004-07-15 2005-07-06 Ecouteur électromagnétique sans radiation Expired - Lifetime EP1617706B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034513 2004-07-15

Publications (3)

Publication Number Publication Date
EP1617706A2 true EP1617706A2 (fr) 2006-01-18
EP1617706A3 EP1617706A3 (fr) 2008-07-23
EP1617706B1 EP1617706B1 (fr) 2010-02-10

Family

ID=35094482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05106154A Expired - Lifetime EP1617706B1 (fr) 2004-07-15 2005-07-06 Ecouteur électromagnétique sans radiation

Country Status (4)

Country Link
EP (1) EP1617706B1 (fr)
AT (1) ATE457601T1 (fr)
DE (1) DE502005008987D1 (fr)
DK (1) DK1617706T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2053876A1 (fr) * 2007-10-18 2009-04-29 Siemens Medical Instruments Pte. Ltd. Dispositif auditif doté d'un raccordement commun pour le blindage et l'identification d'un récepteur
EP2229009A1 (fr) * 2009-03-09 2010-09-15 Oticon A/S Appareil d'aide auditive

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193116A (en) 1991-09-13 1993-03-09 Knowles Electronics, Inc. Hearing and output transducer with self contained amplifier
DE19854201C2 (de) 1998-11-24 2001-05-23 Siemens Audiologische Technik Hörhilfegerät mit Induktionsspule zur Reduzierung magnetischer Störfelder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814095A (en) * 1996-09-18 1998-09-29 Implex Gmbh Spezialhorgerate Implantable microphone and implantable hearing aids utilizing same
US6728384B2 (en) * 2000-06-30 2004-04-27 Beltone Electronics Corporation Hearing aid connection system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193116A (en) 1991-09-13 1993-03-09 Knowles Electronics, Inc. Hearing and output transducer with self contained amplifier
DE19854201C2 (de) 1998-11-24 2001-05-23 Siemens Audiologische Technik Hörhilfegerät mit Induktionsspule zur Reduzierung magnetischer Störfelder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
U. GYSEL, STÖRSICHERER ENTWURF VON ELEKTRONISCHEN GERÄTEN UND KOMPONENTEN (EMV), 2002

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2053876A1 (fr) * 2007-10-18 2009-04-29 Siemens Medical Instruments Pte. Ltd. Dispositif auditif doté d'un raccordement commun pour le blindage et l'identification d'un récepteur
US8295517B2 (en) 2007-10-18 2012-10-23 Siemens Medical Instruments Pte. Ltd. Hearing apparatus with a common connection for shielding and identification of a receiver
EP2229009A1 (fr) * 2009-03-09 2010-09-15 Oticon A/S Appareil d'aide auditive
US8391525B2 (en) 2009-03-09 2013-03-05 Oticon A/S μ-Metal barrier provided in connection with the receiver casing lid assembly

Also Published As

Publication number Publication date
EP1617706A3 (fr) 2008-07-23
DK1617706T3 (da) 2010-06-07
DE502005008987D1 (de) 2010-03-25
EP1617706B1 (fr) 2010-02-10
ATE457601T1 (de) 2010-02-15

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