EP1503612A2 - Prothèse auditive et méthode à l'opération d'une prothèse auditive avec un système de microphone dans lequel de différentes caractéristiques directionnelles sont sélectionnables - Google Patents

Prothèse auditive et méthode à l'opération d'une prothèse auditive avec un système de microphone dans lequel de différentes caractéristiques directionnelles sont sélectionnables Download PDF

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Publication number
EP1503612A2
EP1503612A2 EP04014898A EP04014898A EP1503612A2 EP 1503612 A2 EP1503612 A2 EP 1503612A2 EP 04014898 A EP04014898 A EP 04014898A EP 04014898 A EP04014898 A EP 04014898A EP 1503612 A2 EP1503612 A2 EP 1503612A2
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EP
European Patent Office
Prior art keywords
microphone
microphones
unit
hearing aid
microphone unit
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
EP04014898A
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German (de)
English (en)
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EP1503612A3 (fr
EP1503612B1 (fr
Inventor
Tom Weidner
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Sivantos GmbH
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Siemens Audioligische Technik GmbH
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Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1503612A2 publication Critical patent/EP1503612A2/fr
Publication of EP1503612A3 publication Critical patent/EP1503612A3/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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
    • 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers

Definitions

  • the invention relates to a hearing aid device and a method for operating a hearing aid with at least three microphones, the electrically to form a directional microphone system interconnected with each other.
  • the classification may include u.a. influence have on the operation of noise canceling algorithms as well as on the microphone system. For example selected depending on the detected hearing situation (discretely switched or continuously faded) between a omnidirectional directional characteristic (directional characteristic zeroth order) and a clear directivity of the microphone system (Directivity of first or higher order).
  • a omnidirectional directional characteristic directional characteristic zeroth order
  • a clear directivity of the microphone system Directivity of first or higher order.
  • Such microphone systems show a frequency-dependent transmission behavior, in which a significant drop to low frequencies is recorded.
  • the noise behavior of the microphones is frequency independent and slightly opposite to an omnidirectional microphone strengthened. To achieve a natural sound impression must be the high-pass frequency response of the microphone system be compensated by amplifying the low frequencies. This is the noise present in the low frequency range also reinforced and possibly clear and disturbing audible while silent sounds are obscured by the noise.
  • a hearing aid is known with a Signal processing unit and at least two microphones, the different for the formation of directional microphone systems Order can be interconnected, with the directional microphone systems in turn, in the frequency of the Microphones emitted microphone signals dependent weighting interconnected with each other.
  • the cutoff frequency between adjacent Frequency bands where a different Weighting of the microphone signals is provided set become.
  • EP 0 942 627 A2 is a hearing aid with directional microphone system with a signal processing device, a handset and several microphones whose output signals for Generation of an individual directional microphone characteristic over Delay devices and the signal processing device interconnected in different weightings are.
  • the preferred Receiving direction (main direction) in adaptation to a present hearing situation can be set individually.
  • the microphone signal of the directional Microphones will be in the range of low signal frequencies in its Amplified amplitude and the microphone signal of the omnidirectional Aligned to microphones. Both the microphone signal of the omnidirectional microphones as well as the microphone signal of the Directional microphones are fed to a switching unit. In a first switching position of the switching unit is omnidirectional microphone and in a second switching position the switching unit the directional microphone with a hearing aid amplifier connected. The switching unit can be dependent on the signal level of a microphone signal automatically switch.
  • a disadvantage of the known hearing aid devices with a directional microphone system is that in certain listening situations either the directivity of the microphone system is not optimally used or that a high degree of directivity becomes one clearly audible deterioration of the sound quality.
  • the object of the present invention is to improve the sound quality a hearing aid with directional microphone system to improve.
  • This object is achieved in a hearing aid with at least three microphones used to form a directional microphone system electrically interconnected, solved by that at least two microphones to a first microphone unit with a directional characteristic of a particular order interconnected and that at least two microphones to a second Microphone unit with a directional characteristic of the same order are interconnected, including the two microphone units for forming a third microphone unit with a Directional characteristic of the same order are connected.
  • the object is in a method for operating a Hearing aid with at least three microphones used for education of a directional microphone system electrically interconnected be solved by at least two microphones to a first microphone unit with a directional characteristic be interconnected to a particular order and that at least two microphones to a second microphone unit interconnected with a directional characteristic of the same order be, with the two microphone units for education a third microphone unit with a directional characteristic the same order are interconnected electrically.
  • the hearing aid according to the invention comprises a microphone system with at least three microphones, for directional characteristics to realize zeroth to second order. It can However, more than three microphones will be present, so that Also directional characteristics of higher order are possible.
  • the hearing aid device comprises a signal processing unit for processing and frequency dependent amplification of the microphone signal generated by the microphone system.
  • the signal output usually takes place by an acoustic output signal by means of a handset. But there are others, e.g. Vibrating output transducer known.
  • a directional characteristic of zero order in the context of the invention is an omnidirectional directional characteristic to understand for example, a single, not with others Microphones interconnected omnidirectional microphone emerges.
  • a microphone unit with a directional characteristic first order (directional microphone first order), for example through a single gradient microphone or the electric Interconnection of two omnidirectional microphones realized become.
  • directional microphones of the first order is a theoretical one achievable maximum value of the Miniiviti Index (DI) of 6 dB (hypercardioid).
  • DI Cosmeticiviti Index
  • Directional microphones second and higher order have DI values of 6 dB and more, for example, for better speech intelligibility are advantageous. Does a hearing aid include a microphone system? with for example three omnidirectional microphones, so can be based on this by appropriate interconnection of the microphones simultaneously microphone units with directional characteristics zeroth to second order can be realized.
  • a single omnidirectional microphone makes a difference Microphone unit zeroth order dar. Will with two omnidirectional Microphones delay the microphone signal of a microphone, and subtracted from the microphone signal of the other microphone, This creates a first-order microphone unit. Will in turn with two microphone units first order the Microphone signal of a microphone unit delayed, and of the Microphone signal of the second microphone unit of the first order subtracted, the result is a microphone unit with directional characteristics second order. In this way you can - depending on the number of omnidirectional microphones - microphone units realize any order.
  • a microphone system include different microphone units Order, so can between different directional characteristics be switched over, e.g. by switching on or off one or more microphones. Furthermore, by a suitable electrical connection of the microphone units also any mixed forms between the directional characteristics different order are generated. For this purpose, the Microphone signals of the microphone units weighted differently and added before being in the signal processing unit the hearing aid is further processed and amplified. So can also be a continuous, smooth transition between different directional characteristics are realized, which avoids disturbing artifacts when switching to let.
  • the basic idea of the invention consists in a directional microphone system with several microphones not with the given Number of microphones maximum order of directivity set but several microphone units with lower than the largest possible order and the from these microphone units outgoing microphone signals to Provide further processing.
  • the different Microphone units optimized for specific frequency ranges so that after merging the of the Microphone units with directional characteristics of the same order Outgoing microphone signals a directional microphone of the same order arises, compared to the individual microphone units over a broad or the whole to be transferred Frequency range an improved signal transmission behavior shows.
  • a different frequency response of the microphone units can e.g. by a suitable selection of omnidirectional microphones carried out, the formation of the microphone unit electrically interconnected with each other.
  • a suitable selection of omnidirectional microphones carried out the formation of the microphone unit electrically interconnected with each other.
  • two omnidirectional microphones which are in a relatively short distance to each other, in and of itself for the Directionality not the distance of the microphones as such crucial is, but the distance of the sound inlet openings these microphones.
  • each with a sound inlet opening in the housing of the hearing aid at least in Essentially the same for all microphones is equivalent the distance of the microphones the distance of the sound inlet openings these microphones.
  • a second microphone unit In a second microphone unit are two omnidirectional Microphones interconnected, between those in comparison to the first microphone unit a greater distance between the two omnidirectional microphones.
  • the two thus formed differ Microphone units in their signal transmission behavior, although both microphone units have the same order of directivity (first order in the example).
  • the microphone unit with the short distance between the two omnidirectional microphones better for transmission high frequencies and the microphone unit with the greater distance between the two used omnidirectional Microphones are better for transmitting low frequencies suitable.
  • Be the emanating from both microphone units Microphone signals then merged, so results a microphone system that operates over a wide frequency range shows a good signal transmission behavior.
  • the signal-to-noise ratio improved over a directional microphone, in which the largest possible with the existing number of microphones Order of directivity is set.
  • the invention provides for the hearing aid wearer clear advantages. So is the microphone system less Noise generated as in a microphone system with the largest possible Order of the directional characteristic, with the existing Number of microphones is possible. Further shows the microphone system a high over a wide frequency range Level of sensitivity. The typical for directional microphones existing high-pass effect, which leads to a falsification the usual sound pattern leads, can be mitigated become. Furthermore, the directivity is improved. For example, e.g. the AI-DI of a constructed according to the invention Directional microphone system higher than a conventional directional microphone system same order.
  • a development of the invention provides a different Microphone units downstream weighting unit before, by which of the different microphone units outgoing microphone signals before adding different can be weighted.
  • the hearing aid according to the invention is for example, a behind the ear portable hearing aid, a in the ear portable hearing aid, an implantable hearing aid, a pocket hearing aid or a pair of hearing glasses. Furthermore, that can Hearing aid according to the invention also part of a plurality of devices for the care of a hearing aid system comprising hearing impaired people be, e.g. Part of a hearing aid system with two am Head worn hearing aids for binaural care, part a hearing aid system with a head-worn hearing aid and a wearable external processor unit, part a completely or partially implantable hearing aid system with multiple components or part of a hearing aid system with external auxiliary components such as remote control unit or external Microphone unit.
  • FIG. 1 shows a hearing aid device 1 which can be worn behind the ear. in the housing three sound inlet openings 2, 3 and 4 available.
  • the incident in the sound inlet opening 2 Sound is an omnidirectional microphone 5, which in the sound inlet opening 3 incident sound an omnidirectional Microphone 6 and the in the sound inlet opening 4 incident sound an omnidirectional microphone 7 supplied.
  • the microphones 5-7 each convert an acoustic input signal in an electric microphone signal, by different electrical interconnections of the three microphones 5, 6 and 7 different directional characteristics of the microphone system are adjustable. That from the microphone system Outgoing microphone signal is for further processing and frequency-dependent amplification of a signal processing unit 8 supplied. Finally, the electrical output signal the signal processing unit 8 by a listener.
  • a battery 11 is provided. Furthermore includes the hearing aid 1 according to the embodiment two Controls 12 and 13, wherein the key switch 12 for program selection and the volume control 13 for setting the Volume is used.
  • a hearing aid 1 with a microphone system can directivities zeroth to second Order to be generated. So far, was for an omnidirectional Reception (directivity of zero order) only the Microphone signal of a microphone, e.g. of the microphone 5, further processed. To produce a directivity of the first order, two microphones were electrically interconnected, e.g. the microphones 5 and 7, and the output of this Microphone unit further processed. The output signal of the third microphone (in the example the output signal of the microphone 6) was not used. Preferably, therefore, that is Microphone 6 is turned off in this mode of the hearing aid 1. Only to produce a directivity of second order the output signals of all three microphones were used.
  • Microphone signal delayed and subtracted from the microphone signal is, which emanates from the microphone 5.
  • that can from the microphone 7 outgoing microphone signal delayed and from the microphone signal originating from the microphone 6 subtracted become.
  • a directivity of the second order is obtained for example, the fact that that of the second microphone unit Outgoing microphone signal delayed and from the microphone signal the first microphone unit is subtracted.
  • the hearing aid 1 - three omnidirectional microphones 5, 6 and 7 to form two Microphone units with directivity of the first order electrically interconnected. It is preferred the first microphone unit from the two microphones 5 and 6 and the second microphone unit from the two microphones 5 and 7 formed. As the drawing is easily taken can, so is the distance between the two microphones 5 and 6 (or the distance between the sound inlet openings 2 and 3 of the two microphones 5 and 6) of the first microphone unit small in Ratio to the distance between the two microphones 5 and 7 (or to the Distance of the sound inlet openings 2 and 4 of the microphones. 5 and 7) the second microphone unit.
  • the two microphone signals of the microphone units first order not to form a directional microphone with Directivity of second order electrically interconnected, but just added, that's what the microphones say Although 5, 6 and 7 formed directional microphone system also only a directional characteristic of first order, however - considered over the entire transmittable frequency range - compared with an improved signal transmission behavior to the individual, from two omnidirectional each Microphones formed microphone units.
  • FIG. 2 shows a simplified block diagram of the directional microphone system a hearing aid with three omnidirectional Microphones 20, 21 and 22, e.g. as illustrated in FIG can be arranged in a hearing aid 1.
  • the three omnidirectional Microphones 20, 21 and 22 each have a signal preprocessing unit 23, 24 and 25 downstream.
  • the Signal pre-processing units 23-25 are e.g. each an A / D conversion, a microphone adjustment to compensate for Component tolerances on the microphones, a signal delay etc.
  • that of the omnidirectional Microphone 21 outgoing electric microphone signal in the Signal pre-processing unit 24 delayed, inverted and in the adder 26 to that of the omnidirectional microphone 20 outgoing electrical microphone signal added.
  • the two omnidirectional microphones 20 and 21 a first Microphone unit with directivity of first order.
  • the two microphones 20 and 22 thereby form a microphone unit Directivity of first order.
  • the inversion of a Microphone signal and subsequent addition with each another microphone signal actually corresponds to a subtraction the two microphone signals.
  • Unlike known Directional microphone arrangements with three omnidirectional microphones Now there is no delay and inversion of a microphone signal the two microphone units, which means Addition to the microphone signal of the other microphone unit a directional microphone system with directivity second Order would arise.
  • the two from the microphone units with directivity of the first order outgoing microphone signals each first a filter unit Fed 28 and 29 and then in an adder 30 added.
  • the filter device 28 as High pass and the filter device 29 designed as a low pass. Since neither of the two microphone signals at the input of the Adder 30 is delayed and inverted, is also the at the output of the adder 30 adjacent microphone signal from a Microphone system with directivity of the first order. This finally goes through the usual hearing aids further signal processing (not visible in the circuit diagram).
  • a geometric arrangement of the microphones 20, 21 and 22 or the sound inlet openings of these microphones according to The embodiment of Figure 1 also arise in the directional microphone system according to Figure 2 in the explanations to advantages described in FIG.
  • FIG. 3 An alternative embodiment to the embodiment according to Figure 2 shows Figure 3. Also in this embodiment are three omnidirectional microphones 40, 41 and 42 to Formation of a directional microphone system with directional characteristics interconnected first order. Also the microphones 40, 41 and 42 are each a signal preprocessing unit 43, 44 and 45 downstream. In contrast to the embodiment in accordance with FIG. 2, however, in each case two juxtaposed microphones a microphone unit first Order. This is what the omnidirectional microphone does 41 outgoing electrical microphone signal in the signal preprocessing unit 44 delayed and inverted and in one Adder 46 to that of the omnidirectional microphone 40 outgoing Microphone signal added. The two omnidirectional Microphones 40 and 41 thus form a first microphone unit with directivity of first order.
  • the two microphones 41 and 42 form a Microphone unit with directivity of first order.
  • the not necessarily required filter devices 28 and 29 according to the embodiment of Figure 2 corresponding Filtering devices are in the embodiment not provided according to FIG.
  • the microphone signals is a weighting unit 51 available.
  • FIG 4 the main advantage of the invention is graphically illustrated. Shown in a diagram is the signal transmission behavior two microphone units with directional characteristics first order depending on the signal frequency. There are two transfer curves A and B, wherein the curve A is the signal transmission behavior of a microphone unit with a relatively large gap between the individual microphones or a relative large delay time. In contrast to this the curve B shows the signal transmission behavior at low Microphone distance or small delay time. Both curves have the typical high-pass characteristic of a directional microphone system on. Become according to the invention, the microphone signals adds both microphone units, so results in total a signal transmission behavior according to the curve C, the at low frequencies substantially with the curve A and at higher frequencies substantially coincides with the curve B. Overall, thus results in a relatively wide frequency range good signal transmission behavior.
  • the invention is not limited to the embodiments with a Directional microphone system with three microphones each limited, but it also opens up in an analogous way Directional microphone systems with more than three microphones transmitted.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Stereophonic Arrangements (AREA)
EP04014898A 2003-07-28 2004-06-24 Prothèse auditive et méthode à l'opération d'une prothèse auditive avec un système de microphone dans lequel de différentes caractéristiques directionnelles sont sélectionnables Revoked EP1503612B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334396 2003-07-28
DE10334396A DE10334396B3 (de) 2003-07-28 2003-07-28 Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegerätes mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteristiken einstellbar sind

Publications (3)

Publication Number Publication Date
EP1503612A2 true EP1503612A2 (fr) 2005-02-02
EP1503612A3 EP1503612A3 (fr) 2009-01-21
EP1503612B1 EP1503612B1 (fr) 2009-08-19

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EP04014898A Revoked EP1503612B1 (fr) 2003-07-28 2004-06-24 Prothèse auditive et méthode à l'opération d'une prothèse auditive avec un système de microphone dans lequel de différentes caractéristiques directionnelles sont sélectionnables

Country Status (6)

Country Link
US (1) US20050058312A1 (fr)
EP (1) EP1503612B1 (fr)
AT (1) ATE440456T1 (fr)
AU (1) AU2004203392B2 (fr)
DE (2) DE10334396B3 (fr)
DK (1) DK1503612T3 (fr)

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US7542580B2 (en) * 2005-02-25 2009-06-02 Starkey Laboratories, Inc. Microphone placement in hearing assistance devices to provide controlled directivity
DK1841281T3 (en) * 2006-03-28 2015-10-26 Oticon As System and method for generating auditory spatial information
US7936890B2 (en) * 2006-03-28 2011-05-03 Oticon A/S System and method for generating auditory spatial cues
EP2088802B1 (fr) 2008-02-07 2013-07-10 Oticon A/S Procédé d'évaluation de la fonction de poids des signaux audio dans un appareil d'aide auditive
US20090259091A1 (en) * 2008-03-31 2009-10-15 Cochlear Limited Bone conduction device having a plurality of sound input devices
DE102008046040B4 (de) * 2008-09-05 2012-03-15 Siemens Medical Instruments Pte. Ltd. Verfahren zum Betrieb einer Hörvorrichtung mit Richtwirkung und zugehörige Hörvorrichtung
DE102008064484B4 (de) 2008-12-22 2012-01-19 Siemens Medical Instruments Pte. Ltd. Verfahren zum Auswählen einer Vorzugsrichtung eines Richtmikrofons und entsprechende Hörvorrichtung
DE102009014053B4 (de) 2009-03-19 2012-11-22 Siemens Medical Instruments Pte. Ltd. Verfahren zum Einstellen einer Richtcharakteristik und Hörvorrichtungen
JP5452158B2 (ja) * 2009-10-07 2014-03-26 株式会社日立製作所 音響監視システム、及び音声集音システム
CN103686574A (zh) * 2013-12-12 2014-03-26 苏州市峰之火数码科技有限公司 立体声电子助听器
EP3383061A4 (fr) * 2015-11-25 2018-11-14 Sony Corporation Dispositif de collecte de son

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WO2000076268A2 (fr) * 1999-06-02 2000-12-14 Siemens Audiologische Technik Gmbh Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese
WO2002003750A2 (fr) * 2000-07-05 2002-01-10 Gn Resound Corporation Systeme de microphone directionnel ameliore
US20030016588A1 (en) * 2000-08-11 2003-01-23 Hans-Ueli Roeck Method for directional location and locating system

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Publication number Priority date Publication date Assignee Title
WO2000076268A2 (fr) * 1999-06-02 2000-12-14 Siemens Audiologische Technik Gmbh Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese
WO2002003750A2 (fr) * 2000-07-05 2002-01-10 Gn Resound Corporation Systeme de microphone directionnel ameliore
US20030016588A1 (en) * 2000-08-11 2003-01-23 Hans-Ueli Roeck Method for directional location and locating system

Also Published As

Publication number Publication date
DK1503612T3 (da) 2009-11-23
AU2004203392A1 (en) 2005-02-17
DE10334396B3 (de) 2004-10-21
EP1503612A3 (fr) 2009-01-21
EP1503612B1 (fr) 2009-08-19
DE502004009913D1 (de) 2009-10-01
US20050058312A1 (en) 2005-03-17
AU2004203392B2 (en) 2007-01-04
ATE440456T1 (de) 2009-09-15

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