EP2373065A1 - Dispositif auditif et procédé de production d'une caractéristique de direction omnidirectionnelle - Google Patents

Dispositif auditif et procédé de production d'une caractéristique de direction omnidirectionnelle Download PDF

Info

Publication number: EP2373065A1
Authority: EP; European Patent Office
Prior art keywords: microphone; microphones; signal; hearing; coupling
Prior art date: 2010-03-17
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

EP11155306A

Other languages

German (de)

English (en)

Other versions

EP2373065B1 (fr

EP2373065B2 (fr

Inventor

Georg-Erwin Arndt

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Sivantos Pte Ltd

Original Assignee

Siemens Medical Instruments Pte Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2010-03-17

Filing date

2011-02-22

Publication date

2011-10-05

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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44041570&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2373065(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

2011-02-22 Application filed by Siemens Medical Instruments Pte Ltd filed Critical Siemens Medical Instruments Pte Ltd

2011-10-05 Publication of EP2373065A1 publication Critical patent/EP2373065A1/fr

2016-01-13 Publication of EP2373065B1 publication Critical patent/EP2373065B1/fr

2018-10-03 Application granted granted Critical

2018-10-03 Publication of EP2373065B2 publication Critical patent/EP2373065B2/fr

Status Active legal-status Critical Current

2031-02-22 Anticipated expiration legal-status Critical

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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
- H04R25/00—Electric hearing aids
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
- H04R25/407—Circuits for combining signals of a plurality of 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
- H04R2225/41—Detection or adaptation of hearing aid parameters or programs to listening situation, e.g. pub, forest
- 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
- H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility

Definitions

the invention relates to a hearing device according to the preamble of claim 1.
the invention also relates to a method for generating an omnidirectional directional characteristic for such a hearing device.
the term hearing device is understood in particular to mean a hearing device.
the term includes other portable acoustic devices such as headsets, headphones and the like.
Hearing aids are portable hearing aids that are used to care for the hearing impaired.
different types of hearing aids such as behind-the-ear hearing aids (BTE), hearing aid with external receiver (RIC: receiver in the canal) and in-the-ear hearing aids (IDO), e.g. Concha hearing aids or canal hearing aids (ITE, CIC).
BTE behind-the-ear hearing aids
RIC hearing aid with external receiver
IDO in-the-ear hearing aids
ITE canal hearing aids
the hearing aids listed by way of example are worn on the outer ear or in the ear canal.
bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The stimulation of the damaged hearing takes place either mechanically or electrically.
Hearing aids have in principle as essential components an input transducer, an amplifier and an output transducer.
the input transducer is usually a sound receiver, z. As a microphone, and / or an electromagnetic receiver, for. B. an induction coil.
the output transducer is usually used as an electroacoustic transducer, z. As miniature speaker, or as an electromechanical transducer, z. B. bone conduction, realized.
the amplifier is usually integrated in a signal processing unit. This basic structure is in FIG. 1 shown using the example of a behind-the-ear hearing aid. In a hearing aid housing 1 for Carrying behind the ear are one or more microphones 2, 2 'installed for receiving the sound from the environment.
a signal processing unit 3 which is also integrated in the hearing aid housing 1, processes the microphone signals and amplifies them.
the output signal of the signal processing unit 3 is transmitted to a loudspeaker or earpiece 4, which outputs an acoustic signal.
the sound is optionally transmitted via a sound tube, which is fixed with an earmold in the ear canal, to the eardrum of the device carrier.
the power supply of the hearing device and in particular the signal processing unit 3 is effected by a likewise integrated into the hearing aid housing 1 battery. 5
a sound usually produces a microphone signal in both microphones 2, 2 '.
the microphone signals differ depending on which direction the sound hits the device.
By combining the individual microphone signals into a single signal it is possible to achieve attenuation in the combined signal, which depends on the direction of incidence of the sound.
Such directional damping is called directivity or directional characteristic of the microphone assembly.
FIG. 2 shows a signal flow graph for a typical processing of microphone signals, as it can be performed to produce such a directivity by a corresponding device 10.
the device 10 comprises delay elements 20, 22. With a delay element, it is possible to generate an output signal which is modified with respect to an input signal in such a way that it would cause a delay of the signal by a time duration ⁇ i . This can be effected, for example, by changing a phase of spectral components of the signal.
the delay ⁇ i for example, to a Duration must be set, which requires a sound to overcome the distance 36 of the microphones 2, 2 '.
the device 10 further comprises adders 24, 26, 28 for superimposing two signals each.
An input signal of a summer can be inverted before the overlay. In FIG. 2 such an inversion is indicated by a minus sign.
the device 10 comprises a multiplier 30 for scaling a signal. In the multiplier 30, the signal is multiplied by the factor a.
the output signal generated by the device 10 can be forwarded via an output 32 to a downstream device. This may be, for example, a digital-to-analog converter, which generates an analog signal for a listener, such as the handset 4.
a cardioid branch 34 the signals of the microphones 2 and 2 'are processed such that a signal results at the adder 28 in which a direction-dependent attenuation results in a cardioid-shaped directional characteristic of the arrangement the microphones 2 and 2 'results.
a cardioid directional characteristic is typical of a first order differential microphone arrangement.
the cardioid directional characteristic is here oriented such that a signal of a sound propagating along a direction 38 is attenuated least. In the event that a user in the FIG. 1 worn hearing aid, the direction 38 corresponds to that of a sound that hits the front of the user from the front.
an anti-cardioid branch 40 effects a directional characteristic of an anti-cardioid. This means that a sound coming from the direction 38 on the front of the user is attenuated the most. On the other hand, a sound which propagates counter to the direction 38, that is to say hits the user from behind, produces the clearest signal in the branch 40.
Changing a directional characteristic in the device 10 between a cardioid directional characteristic and an omnidirectional directional characteristic may be very important to a user of a hearing aid.
a directional sound detection is preferably desired. If, on the other hand, it is important to be able to perceive sounds from all directions, it may be desirable for a user to be able to set an omnidirectional directional characteristic.
a method for operating a hearing aid in which different directional characteristics are adjustable.
the hearing aid has three microphones, which are connected in pairs to directional microphones of the first order. From two microphone units with directional characteristics of the first order then a microphone unit is formed with directivity second order.
the object is achieved by a hearing device according to claim 1. It is also achieved by a method for generating an omnidirectional directional characteristic according to claim 8. Advantageous developments of the hearing device according to the invention are given by the dependent claims.
the hearing device has a microphone arrangement of at least a first and a second microphone and a device for generating a directivity of the microphone arrangement.
the first microphone may be coupled to a first input of the device and the second microphone coupled to a second input of the device.
the means for coupling are designed such that the first microphone can be coupled to both inputs at the same time.
the microphone arrangement may comprise more than two microphones.
the means for coupling are configured to couple each of the microphones to a respective input of the device.
the means for coupling are additionally designed to also couple the second microphone with both inputs. This results in the advantage that the omnidirectional directivity can be effected either with the first or with the second microphone. Depending on which of the two microphones is covered, for example, by hair, then the other microphone can be used. Furthermore, it is possible to continuously vary between a directional characteristic with a high directivity, i. a pronounced directional selectivity, and the omnidirectional directional characteristic overlap.
the phases of the signals in individual channels of an analysis-synthesis filter bank arrangement are always changed in the same way by the device for generating the directivity. It is thus possible to provide omnidirectional sound detection in one channel and directional sound detection in, for example, a spectrally adjacent channel.
the phase of the microphone signal is also changed by the means for generating the directivity, it is ensured that the individual channels can be combined artifact-free in the synthesis filter bank.
the means for coupling it is preferably made possible to selectively interrupt a signal path from the second microphone to the device for generating the directional characteristic. Then there is no disturbance of the microphone signal of the first microphone by an overlay with the microphone signal of the second microphone.
the interruption is optional, i. the second microphone can be coupled to generate a directional characteristic at any time again with the device.
the means for coupling comprise a delay element, via which the first microphone can be coupled to the second input.
a particular advantage results when the delay element is a part of the device itself. Then, no additional delay element needs to be provided, but a delay element already provided by the device for generating the directivity is used. This results in a particularly easy to implement hearing device according to the invention.
the means for coupling preferably comprise at least one means for multiplying an amplitude of a microphone signal by a weighting factor.
the weighting factor can also be a complex number.
This combination of the weighting factors has the advantage that for effecting an omnidirectional directional characteristic, a component the respective microphone signals in an output signal of the device can be changed continuously, without causing unwanted side effects or artifacts. Such a side effect may be, for example, an undesirably loud output signal at the output of the device.
the hearing device according to the invention is also developed in an advantageous manner, when the means for coupling a weighting of an amplitude of a microphone signal and / or a delay of the microphone signal is a function of a frequency of the microphone signal.
This has the advantage that a ratio of a distance of the microphones to a wavelength of a sound can be taken into account by which the microphone signals are caused.
the invention also includes a method for generating an omnidirectional directional characteristic for a hearing device.
the method is suitable for such a hearing device, in which microphones of a microphone arrangement can be coupled to respective inputs of a device for generating a directivity of the microphone arrangement.
the device therefore has a separate input for each of the microphones, via which a microphone signal can be received by the device.
two of the microphones are respectively coupled to at least two of the inputs of the device for generating an omnidirectional directional characteristic.
the advantage is achieved that an omnidirectional directivity based on a microphone signal can be generated only one of the microphones.
the method according to the invention can be developed in accordance with the already described developments of the hearing device according to the invention. Then there are the corresponding further advantages.
FIG. 3 shows a signal flow graph for signal processing, which can be performed in a hearing aid, such as a behind-the-ear hearing aid.
the hearing aid has an arrangement of two microphones 2, 2 ', which in their operation in the Figures 1 and 2 correspond represented microphones. Because of this, are in FIG. 3 the microphones 2 and 2 'provided with the same reference numerals. In the FIG. 3 shown microphones 2, 2 'may be microphones without their own directional characteristic, ie a sound then causes in each of the microphones 2, 2' a microphone signal which is independent of a direction from which the sound hits the respective microphone.
the hearing aid also has a device 10 for generating a directivity of the arrangement of the two microphones 2 and 2 '.
the device 10 may be provided, for example, as a signal processing program in the signal processing unit of the hearing device.
the device 10 corresponds in its operation in connection with FIG. 2 explained device. Because of this, are in FIG. 3 Elements, what elements the in FIG. 2 correspond to the device shown, with the same reference numerals as in FIG. 2 Mistake.
the means 42 comprise summers 44, 46 and multipliers 48, 50, 52, 54.
the microphone 2 is coupled to the summer 44 via the multiplier 48. With the multiplier 48, the microphone signal of the microphone 2 can be weighted with a weighting factor b.
the summer 44 is coupled to the input 12 of the device 10.
the means 42 also comprise the delay element 20 of the device 10.
An output of the delay element 20 is coupled to the summer 46 via the multiplier 54.
the multiplier 54 By the multiplier 54, the output signal of the delay element 20 is weighted with a weighting factor e.
the summer 46 is coupled to input 14 of the device 10.
the means 42 may each comprise a plurality of further elements, which in FIG. 3 are not shown in detail.
they may each comprise a microphone preamplifier and an analog-to-digital converter.
an adjustment of the values can be done automatically depending on environmental parameters.
the factors of the multipliers are then adjusted adaptively, e.g. depending on other control parameters during operation of the hearing aid.
the delay ⁇ i and the factors a, b, c, d and e may be used as a function be provided a frequency. This results in a correspondingly different processing for signal components of different frequencies.
adjustable coupling of the microphones with the inputs of the device 10 can provide an omnidirectional directivity in a particularly reliable manner. But also a conventional processing of the signals is possible.
Frequency-dependent processing can be enabled, for example, by subband processing, in which the microphone signals are broken down into individual frequency channels.
means 10 for generating a directional effect may also have a different arrangement of delay elements, summers and multipliers as well as further elements. Then, directional characteristics other than a cardioid directivity can be generated.

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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)

EP11155306.1A 2010-03-17 2011-02-22 Dispositif auditif et procédé de production d'une caractéristique de direction omnidirectionnelle Active EP2373065B2 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102010011730A DE102010011730A1 (de)	2010-03-17	2010-03-17	Hörvorrichtung und Verfahren zum Erzeugen einer omnidirektionalen Richtcharakteristik

Publications (3)

Publication Number	Publication Date
EP2373065A1 true EP2373065A1 (fr)	2011-10-05
EP2373065B1 EP2373065B1 (fr)	2016-01-13
EP2373065B2 EP2373065B2 (fr)	2018-10-03

Family

ID=44041570

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP11155306.1A Active EP2373065B2 (fr)	2010-03-17	2011-02-22	Dispositif auditif et procédé de production d'une caractéristique de direction omnidirectionnelle

Country Status (4)

Country	Link
US (1)	US8477974B2 (fr)
EP (1)	EP2373065B2 (fr)
DE (1)	DE102010011730A1 (fr)
DK (1)	DK2373065T4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102010011730A1 (de) †	2010-03-17	2011-11-17	Siemens Medical Instruments Pte. Ltd.	Hörvorrichtung und Verfahren zum Erzeugen einer omnidirektionalen Richtcharakteristik
DE102019205709B3 (de) *	2019-04-18	2020-07-09	Sivantos Pte. Ltd.	Verfahren zur direktionalen Signalverarbeitung für ein Hörgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2004057914A1 (fr) *	2002-12-20	2004-07-08	Oticon A/S	Systeme de microphone a reponse directionnelle
EP1489882A2 (fr)	2003-06-20	2004-12-22	Siemens Audiologische Technik GmbH	Procédé pour l'opération d'une prothèse auditive aussi qu'une prothèse auditive avec un système de microphone dans lequel des diagrammes de rayonnement différents sont sélectionnables.
WO2008071236A2 (fr) *	2006-12-15	2008-06-19	Phonak Ag	Système auditif à suppression de bruit améliorée

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5757933A (en) †	1996-12-11	1998-05-26	Micro Ear Technology, Inc.	In-the-ear hearing aid with directional microphone system
AU4776999A (en) †	1999-06-24	2001-01-31	Topholm & Westermann Aps	Hearing aid with controllable directional characteristics
DE10327889B3 (de) †	2003-06-20	2004-09-16	Siemens Audiologische Technik Gmbh	Verfahren zum Betrieb eines Hörhilfegerätes sowie Hörhilfegerät mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteristiken einstellbar sind und Programmiergerät dafür
EP2030476B1 (fr) †	2006-06-01	2012-07-18	Hear Ip Pty Ltd	Procede et systeme pour ameliorer l'intelligibilite de sons
DE102008055760A1 (de) †	2008-11-04	2010-05-20	Siemens Medical Instruments Pte. Ltd.	Adaptives Mikrofonsystem für ein Hörgerät und zugehöriges Verfahren zum Betrieb
DE102008064430B4 (de) †	2008-12-22	2012-06-21	Siemens Medical Instruments Pte. Ltd.	Hörvorrichtung mit automatischer Algorithmenumschaltung
DE102010011730A1 (de) †	2010-03-17	2011-11-17	Siemens Medical Instruments Pte. Ltd.	Hörvorrichtung und Verfahren zum Erzeugen einer omnidirektionalen Richtcharakteristik

2010
- 2010-03-17 DE DE102010011730A patent/DE102010011730A1/de not_active Withdrawn
2011
- 2011-02-22 EP EP11155306.1A patent/EP2373065B2/fr active Active
- 2011-02-22 DK DK11155306.1T patent/DK2373065T4/da active
- 2011-03-17 US US13/050,094 patent/US8477974B2/en active Active

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2004057914A1 (fr) *	2002-12-20	2004-07-08	Oticon A/S	Systeme de microphone a reponse directionnelle
EP1489882A2 (fr)	2003-06-20	2004-12-22	Siemens Audiologische Technik GmbH	Procédé pour l'opération d'une prothèse auditive aussi qu'une prothèse auditive avec un système de microphone dans lequel des diagrammes de rayonnement différents sont sélectionnables.
WO2008071236A2 (fr) *	2006-12-15	2008-06-19	Phonak Ag	Système auditif à suppression de bruit améliorée

Also Published As

Publication number	Publication date
DE102010011730A1 (de)	2011-11-17
US20110228961A1 (en)	2011-09-22
DK2373065T3 (da)	2016-04-18
EP2373065B1 (fr)	2016-01-13
DK2373065T4 (da)	2019-01-21
EP2373065B2 (fr)	2018-10-03
US8477974B2 (en)	2013-07-02

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