AU2008201690A1 - Hearing apparatus with low-interference receiver control and corresponding method - Google Patents
Hearing apparatus with low-interference receiver control and corresponding method Download PDFInfo
- Publication number
- AU2008201690A1 AU2008201690A1 AU2008201690A AU2008201690A AU2008201690A1 AU 2008201690 A1 AU2008201690 A1 AU 2008201690A1 AU 2008201690 A AU2008201690 A AU 2008201690A AU 2008201690 A AU2008201690 A AU 2008201690A AU 2008201690 A1 AU2008201690 A1 AU 2008201690A1
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- AU
- Australia
- Prior art keywords
- hearing
- data transmission
- control signal
- hearing apparatus
- frequency band
- Prior art date
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Classifications
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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
- H04R25/55—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
- H04R25/552—Binaural
-
- 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
- H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
- H04R25/353—Frequency, e.g. frequency shift or compression
-
- 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
- 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
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuit For Audible Band Transducer (AREA)
- Transceivers (AREA)
Description
S&F Ref: 854040
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
O
aO o
(N
i 0 0~ Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Siemens Medical Instruments Pte. Ltd., of Block 28, Ayer Rajah Crescent No. 06-08, 139959, Singapore Peter Nikles Gottfried Ruckerl Ulrich Schatzle Spruson Ferguson St Martins Tower Level 31 Market Street Sydney NSW 2000 (CCN 3710000177) Hearing apparatus with low-interference receiver control and corresponding method The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(1204736_1) -1o00 c HEARING APPARATUS WITH LOW-INTERFERENCE RECEIVER CONTROL
SAND
CORRESPONDING METHOD s The present invention relates to a hearing apparatus with a transmission unit for wireless data transmission in a main frequency band, a loudspeaker and a control facility for controlling the loudspeaker using a control signal. The present invention also relates to a 00 corresponding method for operating a hearing apparatus. The term "hearing apparatus" is oO Sunderstood here to mean in particular a hearing device, a headset, earphones and other devices which can be worn on the head.
Hearing devices are portable hearing apparatuses which are used to supply the hard-of-hearing. To accommodate the numerous individual requirements, different configurations of hearing devices such as behind-the-ear hearing devices (BTE), in-the-ear is hearing devices (ITE), e.g. including conch hearing devices or completely-in-the-channel hearing devices (CIC), are provided. The hearing devices designed by way of example are worn on the outer ear or in the auditory canal. Furthermore, bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. In such cases the damaged hearing is stimulated either mechanically or electrically.
Essential components of the hearing devices include in principle an input converter, an amplifier and an output converter. The input converter is generally a receiving transducer, e.g. a microphone and/or an electromagnetic receiver, e.g. an induction coil. The output converter is mostly realized as an electroacoustic converter, e.g. a miniature loudspeaker, or as an electromechanical converter, e.g. a bone conduction receiver. The amplifier is usually integrated into a signal processing unit. This basic configuration is shown in the example in FIG 1 of a behind-the-ear hearing device. One or a number of microphones 2 for recording the ambient sound are incorporated in a hearing device housing 1 to be worn behind the ear. A signal processing unit 3, which is similarly integrated into the hearing device housing 1, processes the microphone signals and amplifies them. The output signal of the signal processing unit 3 is transmitted to a loudspeaker and/or receiver 4, which outputs an acoustic signal. The sound is optionally transmitted to the ear drum of the 1196194_1 IRN. 854040 -2- 00 c device wearer via a sound tube, which is fixed with an otoplastic in the auditory canal. The power supply of the hearing device and in particular of the signal processing unit 3 is provided by a battery 5 which is likewise integrated into the hearing device housing 1.
The pulse-density modulation (PDM) or pulse-width modulation (PWM) is frequently used to control the loudspeaker and/or receiver of a hearing device for instance. The digital control is advantageous in that the stage of the digital-analog converter can be dispensed with in the case of digital hearing devices. Digital control circuits also have a significantly 00 Shigher efficiency rate than analog control circuits. By contrast, analog control circuits are less prone to interference, i.e. they occupy a frequency spectrum which is restricted to an acoustic signal with a small harmonic wave part. The very strongly developed harmonic waves in the case of digital control nevertheless interfere with the wireless transmission of data between hearing devices and the transmission between a hearing device and an external accessory (remote controller, wireless programming device, wireless relay device etc.).
One possible solution to this problem could lie in the following compromise: The receiver is controlled analogously in the case of hearing devices with wireless transmission and in the case of hearing devices without the wireless function, a power-saving digital control takes place. Hearing devices with wireless transmission may however thus not profit from the power-saving digital control.
Thus, a need exists to provide a power-saving digital control of the loudspeaker of the hearing apparatus, also especially for digitally operating hearing apparatuses. A further need exists to provide a corresponding method for operating a hearing apparatus.
According to a first aspect of the present disclosure, there is provided a hearing apparatus with a transmission facility for wireless data transmission in a main frequency band, a loud speaker and a control facility for controlling the loudspeaker with a control signal, with the frequency spectrum of the control signal having a significant notch in one range of the main frequency band.
1196194_1 IRN. 854040 -3- 00 According to a second aspect of the present disclosure, there is provided a method for Soperating a hearing apparatus by wirelessly transmitting data in a main frequency band and controlling a loudspeaker of the hearing apparatus with a control signal, with the frequency spectrum of the control signal having a significant notch in one range of the main s frequency band.
NO
By separating the signals for the data transmission and for the control of the loudspeaker in N, the frequency range, alternate interferences hardly occur any more so that a hearing 00 Sapparatus, which is designed for wireless data transmission, can also digitally control the o internal receiver and/or loudspeaker.
The control signal of the control facility is preferably pulse-density modulated or pulsewidth modulated. An inductive loudspeaker which operates as a low pass can thus be controlled by a digital signal processing circuit without considerable signal processing outlay.
The data transmission through the transmission facility can take place in a broadband fashion in several frequency bands and the frequency spectrum of the control signal can have a significant notch in the range of each of the frequency bands in each instance. The principle according to an embodiment of the present disclosure can thus also be applied to a broadband transmission of high data rates.
The transmission facility can also comprise a band pass filter, which essentially only allows frequency parts to pass, which lie in the main frequency band or in the main frequency band and in the range of multiples thereof. The interference resistance of the wireless transmission can herewith be additionally increased.
In one embodiment, the hearing apparatus according to the present disclosure can be configured as an in-the-ear hearing device, even if the current consumption there and the space available are extremely limited. The minimal space available forces the receiver, which is generally a magneto-acoustic converter, very close to the receiver coil. The position and alignment with each device is also individual with in-the-ear hearing devices.
1196194_1 IRN. 854040 00 K In any case, the receiver induces more or less large interference signals into the receiver Scoil. The signal-to-noise ratio there is thus generally clearly impaired. The poor signal-tonoise ratio could be improved by an increased transmission power, which can however only be achieved by an enormous energy requirement. Therefore the inventive solution involving spectrally separating the control signal for the receiver from the transmission signal for the wireless data transmission is even more welcome.
\O
According to a further embodiment, a hearing system with two hearing devices is 00 Sprovided, which each have the design of the hearing apparatus described above, with the transmission facilities of both hearing devices allowing a bidirectional, wireless data transmission and a data transmission in one direction taking place in a different frequency band to a data transmission in the other direction. A real bidirectional connection can thus be made available with synchronized directional transmissions.
is The present invention is described in more detail on the basis of the appended drawings, in which; FIG 1 shows the basic design of a hearing device according to the prior art; FIG 2 shows a hearing device system according to the invention; FIG 3 shows a PDM time signal of the voltage at the receiver FIG 4 shows an enlarged cutout of the PDM time signal in FIG 3; FIG 5 shows the PDM frequency spectrum of the signal in FIG 3 and FIG 6 shows the PDM frequency spectrum of FIG 5 together with an admission curve of an ideally adjusted frequency filter.
The exemplary embodiments illustrated below represent preferred embodiments of the present invention.
1196194_1 IRNI 854040 o00 C- FIG 2 shows a schematic representation of a hearing device system with two hearing devices 10 and 11. The two hearing devices 10, 11 are of an identical design. For the sake of clarity, only features relevant to one or more embodiments of the present disclosure are shown in the hearing device 10 and some features may have been omitted. The central unit of the ITE hearing device 10 is a signal processing unit and/or control unit 12. It is powered by a battery 13. Its output signal is used to control a receiver 14, which is 00 generally designed as a magneto-acoustic converter. Furthermore, the control unit 12 also 00 Scontrols a transmission unit 15, which is used here for the bidirectional transmission to the second hearing device 11. The transmission facility 15 is symbolized by a coil, it can however also contain other transmission components.
FIG 2 shows that the electronic components in the ITE hearing device 10 are arranged spatially very close to one another. In particular, the receiver 14 and the transmission unit is 15 are also positioned very close together, thereby resulting in involuntary mutual influences and interferences.
FIG 3 shows a typical PDM control signal, with which the control unit 12 temporally controls the receiver 14. The information to be transmitted to the receiver pushes into the pulse density. FIG 4 shows an enlarged representation of a cutout of this signal. The density of the pulses varies in the desired manner.
The receiver 14 has a specific inductive characteristic. The temporal PDM voltage signal in the receiver and reproduced in FIG 3 thus produces the current trend illustrated with a dashed line in the FIG.
The frequency spectrum of the PDM voltage signal of FIG 3 is shown in FIG 5. It essentially consists of arcs, which are periodically arranged in rows next to one another and the amplitudes of which reduce as a result of the rectangular shape of the PDM pulses according to the function sin x/x. In certain ranges of the spectrum, namely between two arcs, notches E result in the spectrum, i.e. so-called "freely spaced regions". In these freely spaced regions, none or hardly any interference signals occur. Only the wanted signal N 1196194_1 IRN, 854040 -6- 00oo ,I and/or wanted signal parts N' are then present there. The emergence of notches E can also be explained as follows: The pulse durations Tp of the PDM signal are fixedly selected and appear in a fixed time period ofn x Tp. The statistical distribution of positive and negative pulses is identical for natural audio signals. The frequency 1/(2Tp) as well as its wholes number multiples herewith appear with approximately the same amplitude in the phase position 00 and 1800. This results in the targeted deletion of signals in the range around the frequencies n x 1/(2Tp). This deletion results in the aforementioned "notches". The arched interference signal parts S are produced in between.
00 oO I 10 The basic idea of the present invention now consists in adjusting the working frequency of the digital receiver control to the wireless transmission system. A concrete attempt is thus made to remove interfering receiver noise parts from the used frequency band for the wireless data transmission. This is achieved here by the corresponding favorable shaping of the interference spectrum ("noise shaping") by the working frequency of the PDM modulator likewise being selected such that the notches E lie in the range of the transmission frequency for the wireless transmission and/or the multiples thereof. The wireless transmission is thus again only marginally impaired and the advantages of the digital receiver control remain.
The spaces of the interference parts from the frequency ranges used for the wireless data transmission can be supplemented by additionally known "noise-shaping" methods. Thus for example noise parts from the low-frequency range of audio signals can knowingly be moved in the direction of higher frequencies. This and other known methods thus allow the width and shape of the notches to be optimized in each instance.
The interference resistance of the wireless transmission against the receiver control can be further improved by the signal processing of the wireless transmission part being embodied with a bandpass filter, which only allows frequencies within the wirelessly used bandwidth to pass unobstructed. The filter function F ofa bandpass filter of this type is shown in FIG 6 together with the PDM frequency spectrum of the exemplary signal. The improvement in interference resistance is particularly effective if the characteristics of the bandpass (increase in filter edges, quality of the filter) are adjusted in respect of each other.
1196194_1 IRN. 854040 -7o00 k C. In the example in FIG 5, "notches" occur in fixed frequency intervals. In the simplest case, only one of these is used for the wireless data transmission. For applications with large bandwidth requirements, the wireless transmission can however also be divided into several component frequency ranges. The component frequency ranges are then to lie in other "notches" of the PDM control signal for the receiver. In respect of the interference resistance, the characteristics of the bandpass and those of the "noise-shaping" are to be Sadjusted here to one another. This can be achieved for instance with special comb filters, 00oO Sthe pass-band widths of which are attuned to the "notches".
Following the filtering process, an even, low basic noise level, from which small wanted signals can also still be readily detected, is achieved. The possible coverage of the wireless transmission increases as a result. Alternatively, a higher data rate can be achieved with the same coverage.
The fact that bandwidth-intensive transmissions of audio signals or programming data are possible for applications in which several frequency ranges are used was already indicated above. If necessary, several frequency bands can however also be used for synchronized bidirectional transmissions, by the directions being divided up across different frequency ranges.
1196194 1 IR. 854040
Claims (13)
1. A hearing apparatus comprising: a transmission facility for wireless data transmission in a main frequency band; a loudspeaker; and a control facility for controlling the loudspeaker with a control signal, wherein the frequency spectrum of the control signal has a significant notch in one C range of the main frequency band. 00 ,0
2. The hearing apparatus as claimed in claim 1, with the control signal of the control facility being pulse-density modulated.
3. The hearing apparatus as claimed in either one of claims 1 and 2, with the data transmission taking place through the transmission facility in a broad-band fashion in Is several frequency bands and the frequency spectrum of the control signal in the range of each of the frequency bands having a significant notch in each instance.
4. The hearing apparatus as claimed in any one of the preceding claims, with the transmission facility having a band pass filter, which essentially only allows frequency parts to pass which lie in the main frequency band or in the main frequency band and in the range of multiples thereof.
The hearing apparatus as claimed in any one of the preceding claims, which is embodied as an in-the-ear hearing device.
6. A hearing system with two hearing devices, which each have the design of a hearing apparatus as claimed in any one of claims 3 to 5, with the transmission facilities of both hearing devices allowing a bidirectional, wireless data transmission and a data transmission in one direction taking place in a different frequency band than a data transmission in the other direction. 1196194_1 IRN, 854040 -9- 00 c
7. A method for operating a hearing apparatus, comprising the steps of: wireless data transmission in a main frequency band; and controlling a loudspeaker of the hearing apparatus with a control signal, wherein the frequency spectrum of the control signal has a significant notch in one range of the main frequency band. NO
8. The method as claimed in claim 7, with the control signal being pulse-density N, modulated. 00 I 10
9. The method as claimed in either one of claims 7 and 8, with the data transmission taking place in a broad-band fashion in several frequency bands and the frequency spectrum of the control signal comprising a significant notch in the range of each of the frequency bands in each instance.
10. The method as claimed in any one of claims 7 to 9, with the signal for data transmission being filtered with a band pass, which essentially only allows frequency parts to pass which lie in the main frequency band or in the main frequency band and in ranges of multiples thereof.
11. A hearing apparatus substantially as described herein with reference to Figs 2 to 6 of the accompanying drawings.
12. A hearing system substantially as described herein with reference to Figs 2 to 6 of the accompanying drawings.
13. A method for operating a hearing apparatus, said method being substantially as described herein with reference to Figs 2 to 6 of the accompanying drawings. DATED this Fifteenth Day of April, 2008 Siemens Medical Instruments Pte. Ltd. Patent Attorneys for the Applicant SPRUSON FERGUSON 1196194_1 IRN, 854040
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710018121 DE102007018121B4 (en) | 2007-04-16 | 2007-04-16 | Hearing device with low-noise handset control and corresponding method and hearing system |
| DE102007018121.5 | 2007-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2008201690A1 true AU2008201690A1 (en) | 2008-10-30 |
| AU2008201690B2 AU2008201690B2 (en) | 2010-01-28 |
Family
ID=39535305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2008201690A Ceased AU2008201690B2 (en) | 2007-04-16 | 2008-04-16 | Hearing apparatus with low-interference receiver control and corresponding method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1983800B1 (en) |
| JP (1) | JP5322485B2 (en) |
| CN (1) | CN101312602B (en) |
| AU (1) | AU2008201690B2 (en) |
| DE (1) | DE102007018121B4 (en) |
| DK (1) | DK1983800T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010105291A1 (en) * | 2009-03-16 | 2010-09-23 | Cochlear Limited | Transcutaneous modulated power link for a medical implant |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010039303A1 (en) * | 2010-08-13 | 2012-02-16 | Siemens Medical Instruments Pte. Ltd. | Method for reducing interference and hearing device |
| DE102021200642B3 (en) | 2021-01-25 | 2022-03-17 | Sivantos Pte. Ltd. | hearing aid |
| CN113081765B (en) * | 2021-04-15 | 2022-06-07 | 四川千里倍益康医疗科技股份有限公司 | Electric massager and PWM-based skeleton identification method thereof |
| WO2024004925A1 (en) * | 2022-06-28 | 2024-01-04 | ピクシーダストテクノロジーズ株式会社 | Signal processing device, earphone equipped with microphone, signal processing method, and program |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2212131A1 (en) * | 1996-08-07 | 1998-02-07 | Beltone Electronics Corporation | Digital hearing aid system |
| JP2904272B2 (en) * | 1996-12-10 | 1999-06-14 | 日本電気株式会社 | Digital hearing aid and hearing aid processing method thereof |
| US6605991B2 (en) * | 2001-08-30 | 2003-08-12 | Motorola, Inc. | Circuitry for creating a spectral null in a differential output switching amplifier and method therefor |
| DE10245556B3 (en) | 2002-09-30 | 2004-04-22 | Siemens Audiologische Technik Gmbh | Hearing aid or hearing aid system with a clock generator and method for their operation |
| DE10304648B3 (en) * | 2003-02-05 | 2004-08-19 | Siemens Audiologische Technik Gmbh | Device and method for communicating hearing aids |
| US7289568B2 (en) * | 2003-11-19 | 2007-10-30 | Intel Corporation | Spectrum management apparatus, method, and system |
| CN101015000A (en) * | 2004-06-28 | 2007-08-08 | 皇家飞利浦电子股份有限公司 | Wireless audio |
| US7529378B2 (en) * | 2004-11-12 | 2009-05-05 | Phonak Ag | Filter for interfering signals in hearing devices |
| CN101124849B (en) * | 2005-01-17 | 2012-07-04 | 唯听助听器公司 | Device and method for operating hearing aid |
| JP2006217088A (en) * | 2005-02-01 | 2006-08-17 | Sharp Corp | Auditory transmission system |
| DK1860914T3 (en) * | 2006-05-24 | 2009-03-30 | Phonak Ag | Hearing aid system and method for operating it |
-
2007
- 2007-04-16 DE DE200710018121 patent/DE102007018121B4/en active Active
-
2008
- 2008-03-28 DK DK08103047.0T patent/DK1983800T3/en active
- 2008-03-28 EP EP08103047.0A patent/EP1983800B1/en active Active
- 2008-04-15 JP JP2008105561A patent/JP5322485B2/en active Active
- 2008-04-16 CN CN2008101314532A patent/CN101312602B/en active Active
- 2008-04-16 AU AU2008201690A patent/AU2008201690B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010105291A1 (en) * | 2009-03-16 | 2010-09-23 | Cochlear Limited | Transcutaneous modulated power link for a medical implant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101312602A (en) | 2008-11-26 |
| CN101312602B (en) | 2012-04-25 |
| JP5322485B2 (en) | 2013-10-23 |
| DE102007018121A1 (en) | 2008-10-30 |
| EP1983800A3 (en) | 2009-10-28 |
| EP1983800B1 (en) | 2016-12-14 |
| EP1983800A2 (en) | 2008-10-22 |
| DK1983800T3 (en) | 2017-03-27 |
| DE102007018121B4 (en) | 2012-12-06 |
| AU2008201690B2 (en) | 2010-01-28 |
| JP2008271549A (en) | 2008-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| HB | Alteration of name in register |
Owner name: SIVANTOS PTE. LTD. Free format text: FORMER NAME(S): SIEMENS MEDICAL INSTRUMENTS PTE. LTD. |
|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |