CN101098168A - Bluetooth transmission device for hearing-aids and corresponding transmission method - Google Patents
Bluetooth transmission device for hearing-aids and corresponding transmission method Download PDFInfo
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- CN101098168A CN101098168A CNA2007101262745A CN200710126274A CN101098168A CN 101098168 A CN101098168 A CN 101098168A CN A2007101262745 A CNA2007101262745 A CN A2007101262745A CN 200710126274 A CN200710126274 A CN 200710126274A CN 101098168 A CN101098168 A CN 101098168A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000001939 inductive effect Effects 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims 2
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 description 6
- 229920006132 styrene block copolymer Polymers 0.000 description 5
- 239000003086 colorant Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- H04R25/554—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
- H04R25/55—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
- H04R25/558—Remote control, e.g. of amplification, frequency
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to a wireless audio transmitting device. For instance a wireless audio transmission from a TV set to a hearing device should apply a simple device and keep a small signal relay. The device has a transmission unit (13) for transmission of audio data into a Bluetooth signal, and a hearing aid coder (14) integrated into the unit for compression of the audio data before transmission. A code conversion is not executed in a relay station (16) during the transformation. The transmission unit transmits the signal according to an Advanced Audio Distribution Profile (A2DP) protocol, and the coder scans as an A2DP coder, where the coder has a scanning rate that is less than a standard Bluetooth coder. The system results in the minimization of the coding relay and processing relay in the relay station.
Description
Technical Field
The invention relates to a transmission device for transmitting audio data to a hearing device, comprising a transmitting device for transmitting the audio data in a Bluetooth signal, an encoder integrated in the transmitting device for compressing the audio data before transmission, and a relay station for converting the Bluetooth signal of the transmitting device into a signal for inductive transmission to the hearing device. The invention further relates to a corresponding method for transmitting audio data to a hearing device.
Background
There is an increasing demand for wireless, broadband transmission of speech or music from television equipment or HiFi equipment to hearing devices. In particular, such a transmission should also be able to be transmitted to a hearing system with two hearing devices for binaural presentation.
FM devices or infrared devices are mainly used for wireless audio transmission to hearing devices. This is a device which is provided as a plug-in module for a hearing device, which is used instead of a hearing device, or a device which is integrated in a hearing device, which obviously requires an additional location.
In principle, audio transmission can take into account a plurality of electromagnetic transmission paths. Thus, for example, high-frequency far-field transmission systems and inductive near-field transmission systems can be used. Short distances to the hearing device (less than 1 to 2 meters) that save space and current can be bridged by means of digital, inductive transmission systems. For the audio transmission of television devices or HiFi devices, far-field transmission systems for long distances (effective distances of about 10 m) are required for meaningful operation.
In published patent application DE 102005005603.2, a data transmission device for wireless data transmission to a hearing device is disclosed, which comprises a high-frequency receiving device for receiving a high-frequency modulation signal of an external transmitting device. The mixing means are adapted to mix the high frequency modulated signal with a high frequency like reference signal, so that a modulated output signal can be generated, the carrier frequency of which is at least an order of magnitude lower and which is suitable for inductive transmission. Finally, the output signal to the hearing device is inductively transmitted by the transmitting device. The result of this conversion method is a minimum delay time over the whole radio path, since demodulation, decoding and re-modulation and coding are completely abandoned. However, this transmission has the disadvantage that the entire radio path must be inductively configured, since the data rate in the high-frequency transmission section must be matched to the data rate of the inductive transmission section.
Disclosure of Invention
The invention is therefore based on the object of providing a transmission device and a corresponding transmission method which are inexpensive to develop.
The technical problem of the invention is solved by a transmission device for transmitting audio data to a hearing device, having a transmitting device for transmitting the audio data in a bluetooth signal; an encoder integrated in the transmitting apparatus for compressing the audio data before transmission; and a relay station for converting the bluetooth signal of the transmitting device into a signal for inductive transmission to the hearing device, wherein no transcoding takes place in the relay station when the conversion takes place, the transmitting device transmits in accordance with the bluetooth A2DP protocol, and the encoder operates at a lower scan rate than a standard A2DP encoder.
According to the invention, a method for transmitting audio data to a hearing device is also proposed accordingly, wherein the audio data is encoded; transmitting the audio data to a relay station in a Bluetooth signal; and converts the bluetooth signal to a signal that is inductively transmitted to the hearing device. Wherein no transcoding is performed when the conversion is performed; the transmission is performed according to the Bluetooth A2DP protocol; and encoding at a lower scan rate than the standard A2DP encoder.
Standardized components such as a bluetooth transmitter and a bluetooth receiver, and corresponding bluetooth transmission protocols, can therefore preferably be used. The standardized components of the bluetooth transmission system are tailored to the audio application (e.g. fault protection).
According to the invention, data can be transmitted in both directions if necessary. It is thus also possible to transmit data from the hearing instrument to the external device via a partially standardized transmission path.
The relay station is preferably integrated in the remote control of one or more hearing devices, but may also be integrated in a television remote control, for example. For this purpose, the user does not have to use additional devices for the wireless data transmission.
Advantageously the audio bandwidth is less than 15kHz after compression by the encoder. In particular the audio bandwidth lies between 8 and 12 kHz. The audio data stream is thus already compressed on the transmitting side in such a way that no information that cannot be processed reaches the hearing device.
It is also preferred that the data rate in the bluetooth signal is below 150 kBit/s. Thereby eliminating the need to implement special compression for inductive transmission in baseband.
Drawings
The invention is described in detail below with the aid of the accompanying drawings. Wherein,
fig. 1 shows a transmission system with relay stations for decoding and re-encoding;
fig. 2 shows a transmission system of the invention with relay stations without re-encoding.
Detailed Description
The embodiments described below are preferred embodiments of the present invention. But first a known prior art transmission system as shown in fig. 1 will be described for a better understanding of the invention.
In order to provide binaural hearing, a stereo audio signal 1 is transmitted from a television apparatus or HiFi apparatus to a hearing device or hearing system, corresponding to the system shown in fig. 1. The audio signal 1 is scanned and encoded in the bluetooth transmitter 3. In encoding data is compressed and combined block by block. The bluetooth transmitter 3 supports a number of standard encoders, of which the encoder 4 selected for transmission is employed. An audio signal 1 with 44.1 or 48kHz is typically scanned in the bluetooth A2DP protocol, so that the audio bandwidth of the transmitted signal is 20-24 kHz. The data rate r _ bt is typically 230 ~ 350 kBit/s. The standard bluetooth transmission segment 5 enables wireless communication up to an effective distance of about 10 meters.
A standard bluetooth receiver with a passive bluetooth decoder 7 is provided in the remote control 6 to decode the encoded audio data on the bluetooth transmission segment 5. The data rate has to be reduced to the value r _ hg for a subsequent inductive transmission to the hearing system 2. Thus, a hearing device encoder 8 is provided in the remote control device 6, which sets the data rate down accordingly and provides an audio bandwidth of 8-10 kHz. The data thus encoded is transmitted to the hearing system 2 via the inductive transmission segments. Each hearing device of the hearing system 2 has a respective hearing device decoder 10, 11.
It is thus possible to bridge a greater distance of a television apparatus or HiFi apparatus to a hearing device with minimal overhead and minimal expenditure by using standard transmission methods to a hearing device remote control. As a standard transmission method, a bluetooth method is adopted, which is the most widely used standard for wireless stereo audio transmission in buildings. Finally, the "last meter" from the remote control to the hearing device is inductively bridged.
In particular, the audio signal is digitized in the bluetooth sending station 3 and passed to the relay station, i.e. the remote control 6, by means of the standard audio transmission protocol A2 DP. The standard protocol specifies support for unlicensed codecs, i.e. SBCs. Other defined codecs such as MP3 may also be used, but are not suitable for TV operation (because of high computational delay). The standard also makes it possible to define/use a codec associated with the manufacturer.
As described above, a relatively high amount of data is transmitted according to the standard over the bluetooth transmission segment 5. In SBC, the data rate r _ bt is 230-350 kBit/s. However, the transmission to the hearing device should take place with as small components as possible and with as little current as possible. The inductive transmission section 9 is therefore selected here, but the data transmission rate must be reduced in order to increase the efficiency and accordingly save current. The reduction of data is achieved by transcoding the bluetooth A2DP data stream into the hearing device data stream in the relay station or the remote control 6.
The solution of the wireless transmission segment shown in fig. 1 has several drawbacks. One is that bluetooth data transmission with high bandwidth according to the standard is inefficient for the operation of the hearing device. The reason for this is that hearing devices typically operate with a low audio bandwidth (approximately 8-10 kHz) as an audio application for normal hearing (in the order of 20kHz) due to different quality requirements. Furthermore, transcoding in the repeater leads to a reduction in the audio quality and to an increase in the current consumption, which reduces the operating life of the repeater. Another disadvantage is that the delay time of speech and music from the television apparatus to the hearing device increases due to double the coding delay (long audio block over bluetooth segment) and the processing delay of the remote control. This is considered to be particularly critical when it is to be ensured that the audio transmission from the television set to the hearing device is synchronized with the image, and that undesired color or brightness of the music or speech signal is caused by the direct sound from the television set overlapping the transmitted audio signal.
Thus, the system schematically illustrated in FIG. 2 is employed in accordance with the present invention. The TV or HiFi signal 1 is converted in the transmitting station 13 into the desired hearing device format by means of a hearing device encoder 14. This is represented by the audio bandwidth 8-10 kHz. The signal is also encoded by the hearing device encoder 14 in such a way that a data rate r _ hg suitable for the subsequent inductive transmission section is provided. This is achieved by the corresponding block length of the data block.
The hearing device encoder 14, with which the digitized stereo signal is compressed at the scan rate of the hearing device, is a standard-compliant alternative to the SBC encoder in bluetooth A2DP applications. SBC can also be supported in the transmitter but not used in hearing device applications. Other portions of the physical transmission via the bluetooth A2DP protocol may remain unchanged using the bluetooth transmission segment 15.
In the remote control device 16, the bluetooth data stream in hearing device format is received with a standard bluetooth receiver and may be forwarded to the inductive transmitter of the remote control device 16 without transcoding or digital scan conversion. The bluetooth receiver and the inductive transmitter are therefore indicated in fig. 2 as a bypass 17. The remaining data transmission segments, i.e. the inductive transmission segment 9 and the hearing system 2 with hearing device encoders 10 and 11, are the same as in fig. 1. In the entire transmission according to fig. 2, the effective data rate and clock rate are therefore the same on the bluetooth segment 15 as on the inductive transmission segment 9, i.e. r _ bt r hg.
The transmission segment to the hearing device wearer can be made simple and rarely developed and cost-effective due to the use of the bluetooth standard. The "last meter" to the hearing device can be achieved in particular with the aid of the sensor section 9, which saves energy. The provision of a hearing device encoder in the bluetooth transmitting station 13 and the scanning of the hearing device clock therein brings the following advantages:
a) the efficiency of the transmitting station and the remote control device can be improved. That is, bluetooth transmission via the A2DP protocol can be implemented with significantly smaller data rates than standard applications using SBCs. Thereby reducing current consumption in the transmitting station and the relay station. Furthermore, expensive code conversion is dispensed with in the remote control, which in turn leads to a further saving in current. In particular, longer battery runs or fewer battery replacements can be achieved in the relay station.
b) Since both the bluetooth codec (encoding/decoding) and the codec of the hearing device are lossy transforms, the audio quality of the overall signal is improved, since only one encoding/decoding is required in the system according to the invention of fig. 2.
c) An important quality feature of the overall system is the delay of the audio signal through transmission. On the one hand in TV applications direct sound from the television apparatus and signals transmitted by radio are superimposed in the ear of the hearing device wearer and result in disturbing colors and brightnesses. On the other hand, synchronization of the image and the sound must be ensured. The delay time is minimized by the method of the present invention by eliminating a coding delay and a processing delay in the remote control.
Claims (10)
1. A transmission device for transmitting audio data to a hearing device (2), having:
transmitting means (13) for transmitting audio data in a bluetooth signal;
an encoder (14), integrated in the transmitting device (13), for compressing the audio data before transmission;
a relay station (16) for converting the Bluetooth signal of the transmitting device (13) into a signal for inductive transmission to the hearing device (2);
it is characterized in that the preparation method is characterized in that,
in the relay station (16), no transcoding is performed when the conversion is performed;
the transmitting device (13) transmits in accordance with the Bluetooth A2DP protocol; and
the encoder (14) operates at a lower scan rate than a standard A2DP encoder.
2. The transmission apparatus of claim 1, wherein the data transmission is bidirectional.
3. The transmission apparatus according to claim 1 or 2, wherein the relay station (16) is integrated in a remote control.
4. A transmission apparatus as claimed in any one of claims 1 to 3, wherein the audio bandwidth compressed by the encoder (14) is less than 15 kHz.
5. The transmission apparatus of claim 4 wherein the audio bandwidth is between 8 and 12 kHz.
6. The transmission apparatus according to any one of claims 1 to 5, wherein the data rate in the Bluetooth signal is below 150 kBit/s.
7. A method for transmitting audio data to a hearing device (2), having the steps of:
encoding the audio data;
transmitting the audio data to a relay station (16) in a bluetooth signal;
-converting the bluetooth signal into a signal for inductive transmission to the hearing device (2);
it is characterized in that the preparation method is characterized in that,
no transcoding is performed when the conversion is performed;
the transmission is performed corresponding to the bluetooth A2DP protocol; and
encoding is done at a lower scan rate than the standard A2DP encoder.
8. The method of claim 7, wherein the data transmission is bi-directional.
9. A method as claimed in claim 7 or 8, wherein the encoded audio bandwidth is less than 15 kHz.
10. The method of any of claims 7 to 9, wherein the data rate in the bluetooth signal is below 150 kBit/s.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006029196.4 | 2006-06-26 | ||
| DE102006029196A DE102006029196B4 (en) | 2006-06-26 | 2006-06-26 | Bluetooth transmission device for hearing aids and corresponding transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101098168A true CN101098168A (en) | 2008-01-02 |
| CN101098168B CN101098168B (en) | 2012-10-24 |
Family
ID=38510328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101262745A Active CN101098168B (en) | 2006-06-26 | 2007-06-26 | Bluetooth transmission device for hearing-aids and corresponding transmission method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1874088B1 (en) |
| JP (1) | JP4749390B2 (en) |
| CN (1) | CN101098168B (en) |
| AU (1) | AU2007202880B2 (en) |
| DE (1) | DE102006029196B4 (en) |
| DK (1) | DK1874088T3 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217038B (en) * | 2008-01-17 | 2011-06-22 | 中兴通讯股份有限公司 | An encoding method of audio data SBC algorithm and Bluetooth stereo subsystem |
| CN106792466A (en) * | 2016-12-26 | 2017-05-31 | 歌尔科技有限公司 | A kind of equipment end and host side communication means |
| CN108738006A (en) * | 2018-05-31 | 2018-11-02 | 出门问问信息科技有限公司 | Data transmission method based on bluetooth and device |
| CN108966197A (en) * | 2018-08-20 | 2018-12-07 | 南昌黑鲨科技有限公司 | Audio frequency transmission method, system, audio-frequence player device and computer readable storage medium based on bluetooth |
| CN111050306A (en) * | 2018-10-15 | 2020-04-21 | 北京轩辕联科技有限公司 | Extended connection method and extended connection system for Bluetooth device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008019107A1 (en) | 2008-04-16 | 2009-10-29 | Siemens Medical Instruments Pte. Ltd. | Measuring device for measuring input and output characteristics of hearing device, has measuring chamber for holding hearing device, where high-frequency transmission module is provided for transmitting measuring signal |
| DE102008050351A1 (en) | 2008-10-02 | 2010-04-08 | Siemens Medical Instruments Pte. Ltd. | System for transmitting audio data to hearing aid, has transmitter unit for emitting radio signal with audio data, where delay unit is provided for delaying audio data released by acoustic waves by predetermined delay value |
| CN102362510A (en) * | 2009-03-24 | 2012-02-22 | 松下电器产业株式会社 | Sound and image reproduction system, hearing aid, and sound and image processing device |
| DE102014204557A1 (en) * | 2014-03-12 | 2015-09-17 | Siemens Medical Instruments Pte. Ltd. | Transmission of a wind-reduced signal with reduced latency |
| CN108271144B (en) * | 2018-03-23 | 2023-12-19 | 杜宁 | Bluetooth device and system for carrying out data bidirectional mutual transmission with terminal |
| JP2024146519A (en) | 2023-03-31 | 2024-10-15 | ソニーグループ株式会社 | Information processing system, hearing device and information processing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427555A (en) * | 2001-12-19 | 2003-07-02 | 无线电射频系统公司 | Repeater for wireless communication system |
| US6690657B1 (en) * | 2000-02-25 | 2004-02-10 | Berkeley Concept Research Corporation | Multichannel distributed wireless repeater network |
| WO2005091529A1 (en) * | 2004-03-17 | 2005-09-29 | Koninklijke Philips Electronics N.V. | Radio repeater |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208740B1 (en) * | 1997-02-28 | 2001-03-27 | Karl Grever | Stereophonic magnetic induction sound system |
| AT411950B (en) * | 2001-04-27 | 2004-07-26 | Ribic Gmbh Dr | METHOD FOR CONTROLLING A HEARING AID |
| JPWO2003013068A1 (en) * | 2001-07-30 | 2004-11-25 | ソニー株式会社 | Wireless communication system, wireless communication control device, wireless communication control method, storage medium, and computer program |
| FR2829650B1 (en) * | 2001-09-13 | 2004-07-09 | Cit Alcatel | INTER-NETWORK GATEWAY FOR DIGITAL SIGNAL TRANSMISSION |
| DE10200796A1 (en) * | 2002-01-11 | 2003-07-31 | Reinhard Dagefoerde | Accessory for hearing aid is short-range data radio receiver, especially Bluetooth receiver, whose output can be connected to audio connection of hearing aid |
| JP3754423B2 (en) * | 2003-03-11 | 2006-03-15 | 株式会社東芝 | Electronic equipment and programs |
| EP1782657A1 (en) | 2004-08-18 | 2007-05-09 | Micro Ear Technology, Inc. | Method and apparatus for wireless communication using an inductive interface |
| DE102005005603A1 (en) * | 2005-02-07 | 2006-08-17 | Siemens Audiologische Technik Gmbh | Data transmission device for wireless data transmission for hearing aids and corresponding method |
-
2006
- 2006-06-26 DE DE102006029196A patent/DE102006029196B4/en active Active
-
2007
- 2007-05-24 EP EP07108797.7A patent/EP1874088B1/en active Active
- 2007-05-24 DK DK07108797.7T patent/DK1874088T3/en active
- 2007-06-21 JP JP2007163876A patent/JP4749390B2/en active Active
- 2007-06-21 AU AU2007202880A patent/AU2007202880B2/en not_active Ceased
- 2007-06-26 CN CN2007101262745A patent/CN101098168B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6690657B1 (en) * | 2000-02-25 | 2004-02-10 | Berkeley Concept Research Corporation | Multichannel distributed wireless repeater network |
| CN1427555A (en) * | 2001-12-19 | 2003-07-02 | 无线电射频系统公司 | Repeater for wireless communication system |
| WO2005091529A1 (en) * | 2004-03-17 | 2005-09-29 | Koninklijke Philips Electronics N.V. | Radio repeater |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217038B (en) * | 2008-01-17 | 2011-06-22 | 中兴通讯股份有限公司 | An encoding method of audio data SBC algorithm and Bluetooth stereo subsystem |
| CN106792466A (en) * | 2016-12-26 | 2017-05-31 | 歌尔科技有限公司 | A kind of equipment end and host side communication means |
| CN106792466B (en) * | 2016-12-26 | 2020-10-09 | 歌尔科技有限公司 | Method for communication between equipment end and host end |
| CN108738006A (en) * | 2018-05-31 | 2018-11-02 | 出门问问信息科技有限公司 | Data transmission method based on bluetooth and device |
| CN108738006B (en) * | 2018-05-31 | 2021-06-25 | 出门问问信息科技有限公司 | Data transmission method and device based on Bluetooth |
| CN108966197A (en) * | 2018-08-20 | 2018-12-07 | 南昌黑鲨科技有限公司 | Audio frequency transmission method, system, audio-frequence player device and computer readable storage medium based on bluetooth |
| CN111050306A (en) * | 2018-10-15 | 2020-04-21 | 北京轩辕联科技有限公司 | Extended connection method and extended connection system for Bluetooth device |
Also Published As
| Publication number | Publication date |
|---|---|
| DK1874088T3 (en) | 2015-10-12 |
| EP1874088A3 (en) | 2011-05-25 |
| DE102006029196A1 (en) | 2007-12-27 |
| CN101098168B (en) | 2012-10-24 |
| AU2007202880A1 (en) | 2008-01-17 |
| EP1874088A2 (en) | 2008-01-02 |
| DE102006029196B4 (en) | 2009-12-10 |
| JP4749390B2 (en) | 2011-08-17 |
| AU2007202880B2 (en) | 2009-07-23 |
| EP1874088B1 (en) | 2015-07-08 |
| JP2008011527A (en) | 2008-01-17 |
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Address after: Erlangen Patentee after: Xiwantuo Co., Ltd. Address before: Erlangen Patentee before: Siemens Audiologische Technik GmbH |