EP1154673A1 - Combining two signals in a hearing aid - Google Patents
Combining two signals in a hearing aid Download PDFInfo
- Publication number
- EP1154673A1 EP1154673A1 EP00610046A EP00610046A EP1154673A1 EP 1154673 A1 EP1154673 A1 EP 1154673A1 EP 00610046 A EP00610046 A EP 00610046A EP 00610046 A EP00610046 A EP 00610046A EP 1154673 A1 EP1154673 A1 EP 1154673A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- magnetic field
- hearing aid
- generating
- signals
- 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
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Classifications
-
- 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
- H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
- H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
-
- 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
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
- H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing
Definitions
- the invention relates to communication devices, more specifically to the problem of combining two electrical signals, e.g. in connection with the presence of an occlusion effect or acoustical feedback or noise cancellation in a hearing aid, a headset or a telephone.
- Communication devices of various kinds are known where two or more signals often could be combined in order to achieve a desired effect.
- the communication devices count hearing aids, headsets and telephones, especially mobile telephones.
- Hearing aids are devices intended for providing remedy for a hearing impairment experienced by a person.
- the hearing aid typically comprises a microphone, an amplifier and an output receiver assembled in a housing to be placed behind the ear or in the ear of the user. Examples from the hearing aid area counts occlusion effect and acoustic and magnetic feedback, which can be very annoying and often will totally destroy the communication to and from the hearing aid user.
- a headset typically comprises at least one output transducer and one input transducer, for output of e.g. a telephone signal and for input to a telephone, respectively. Connecting wires or a wireless connection to a telephone may be provided.
- a mobile telephone typically comprises at least one output transducer and one input transducer and receiving and transmitting means.
- Noise reduction algorithms are often implemented in order to achieve a more clear communication.
- An objective of the present invention is to provide a method by which two signals may be added to each other with reduced negative influence on the desired output signal.
- Another objective of the present invention is to provide a communication device where two signals may be added to each other with reduced negative influence on the desired output signal.
- a further objective of the present invention is to provide a hearing aid, where two signals may be added to each other with reduced negative influence on the desired output signal.
- a still further objective of the present invention is to provide a receiver (speaker), which can be used in a hearing aid of the type mentioned above in connection with the adding of two signals to each other with reduced negative influence on the desired output signal.
- the first objective is achieved by means of a method as defined in claim 1.
- the second objective is achieved by means of a device as defined in claim 5.
- the third objective is achieved by means of a hearing aid as defined in claim 5.
- the fourth objective is achieved by means of a speaker as defined in claim 14.
- FIG. 1 is a schematical diagram showing the principles of the invention.
- FIG. 2 is a schematical drawing of a hearing aid featuring the invention
- FIG. 3 is a schematical drawing showing a receiver according to the invention.
- a first microphone is provided for picking up acoustic input from the environment.
- the acoustic signals are transformed into an analog electric signal and converted into a digital signal in an AD converter.
- the digital signal is processed and amplified in a processor.
- the processed signal is converted into an analog signal in a DA converter and supplied to an output transducer, a so-called receiver.
- a second microphone is provided for picking up a boneconducted signal or an acoustic feedback signal.
- the boneconducted signal may result in the previously described occlusion effect and the acoustic feedback signal may result in a closed feedback loop giving rise to an uncontrolled oscillation in the hearing aid.
- the signal picked up by the second microphone is processed and afterwards supplied to the same output transducer as the first signal.
- the output transducer features two separate driving coils and the first and the second signal are supplied one to each of these coils.
- FIG. 2 a hearing aid appears showing the location of the respective elements described in connection with FIG. 1.
- the necessary power supply preferably a battery, is not shown. The skilled person will however immediately be able to implement this.
- an output transducer appears in a cross sectional view. It appears that two electrically separated driving coils are located within a transducer housing. The driving coils are located in such a manner that each of these upon receiving an electrical signal through the terminals provided on the outside of the transducer housing will induce a field that drives the membrane likewise provided in the transducer housing.
- the two driving coils electrically separated in the transducer housing a compact unit may be achieved and the two individual signals may be supplied to the transducer without interfering with each other. The two signals are hence supplied to the transducer in their desired undisturbed form and the resulting acoustic output signal will show a superpositioning of the two signals. In this manner it is possible to add a digital and an analog signal to each other, without disturbing one or both of the signals, and achieve a desired combined signal. It is of course also possible to combine two digital or two analog signals and still achieve an improvement in the combined signal.
Abstract
Description
- The invention relates to communication devices, more specifically to the problem of combining two electrical signals, e.g. in connection with the presence of an occlusion effect or acoustical feedback or noise cancellation in a hearing aid, a headset or a telephone.
- Communication devices of various kinds are known where two or more signals often could be combined in order to achieve a desired effect. The communication devices count hearing aids, headsets and telephones, especially mobile telephones.
- Hearing aids are devices intended for providing remedy for a hearing impairment experienced by a person. The hearing aid typically comprises a microphone, an amplifier and an output receiver assembled in a housing to be placed behind the ear or in the ear of the user. Examples from the hearing aid area counts occlusion effect and acoustic and magnetic feedback, which can be very annoying and often will totally destroy the communication to and from the hearing aid user.
- A headset typically comprises at least one output transducer and one input transducer, for output of e.g. a telephone signal and for input to a telephone, respectively. Connecting wires or a wireless connection to a telephone may be provided.
- A mobile telephone typically comprises at least one output transducer and one input transducer and receiving and transmitting means.
- It is apparently desirous in hearing aids and other communication devices, such as headsets and telephones to combine two or more signals in order to provide a compensation for an undesired signal influencing the use of the communication device. This is particularly relevant in noisy environments and when the communication device is used by a person who has a hearing impairment making speech understanding more difficult when an environmental distortion is present.
- In the field of hearing aids the occlusion effect and feedback problems are well-known phenomenon, which gives rise to a significant irritation and discomfort when using a hearing aid.
- From other areas, such as the headset and the telephone areas, the problems are most often noise related. Noise reduction algorithms are often implemented in order to achieve a more clear communication.
- For all areas counts that the combination of signals sets significant demands to the signal processing equipment. The problems of combining two or more signals in fact often gives rise to several problems and the result of the combination often results in a significantly reduced quality of the desired signal. The problems of combining two signals are particularly significant when the one signal is a digital signal and the other signal is an analog signal. In this situation the negative influence of the signals on each other is often devastating.
- An objective of the present invention is to provide a method by which two signals may be added to each other with reduced negative influence on the desired output signal.
- Another objective of the present invention is to provide a communication device where two signals may be added to each other with reduced negative influence on the desired output signal.
- A further objective of the present invention is to provide a hearing aid, where two signals may be added to each other with reduced negative influence on the desired output signal.
- A still further objective of the present invention is to provide a receiver (speaker), which can be used in a hearing aid of the type mentioned above in connection with the adding of two signals to each other with reduced negative influence on the desired output signal.
- According to the invention the first objective is achieved by means of a method as defined in
claim 1. - Preferred embodiments of the method are disclosed in claims 2-4.
- According to the invention the second objective is achieved by means of a device as defined in claim 5.
- Preferred embodiments of the device are disclosed in claims 6-8.
- According to the invention the third objective is achieved by means of a hearing aid as defined in claim 5.
- Preferred embodiments are described in claims 10-13.
- According to the invention the fourth objective is achieved by means of a speaker as defined in claim 14.
- Preferred embodiments of the receiver are disclosed in claims 15.
- The invention is explained in more detail with reference to the drawings in the following description of preferred embodiments.
- FIG. 1 is a schematical diagram showing the principles of the invention.
- FIG. 2 is a schematical drawing of a hearing aid featuring the invention;
- FIG. 3 is a schematical drawing showing a receiver according to the invention.
- From FIG. 1 the principles of a hearing aid featuring the invention appear. A first microphone is provided for picking up acoustic input from the environment. The acoustic signals are transformed into an analog electric signal and converted into a digital signal in an AD converter. Afterwards the digital signal is processed and amplified in a processor. Following the processing the processed signal is converted into an analog signal in a DA converter and supplied to an output transducer, a so-called receiver. A second microphone is provided for picking up a boneconducted signal or an acoustic feedback signal. The boneconducted signal may result in the previously described occlusion effect and the acoustic feedback signal may result in a closed feedback loop giving rise to an uncontrolled oscillation in the hearing aid. Both situations are undesired for the hearing aid user. The signal picked up by the second microphone is processed and afterwards supplied to the same output transducer as the first signal. The output transducer features two separate driving coils and the first and the second signal are supplied one to each of these coils.
- From FIG. 2 a hearing aid appears showing the location of the respective elements described in connection with FIG. 1. The necessary power supply, preferably a battery, is not shown. The skilled person will however immediately be able to implement this.
- From FIG. 3 an output transducer appears in a cross sectional view. It appears that two electrically separated driving coils are located within a transducer housing. The driving coils are located in such a manner that each of these upon receiving an electrical signal through the terminals provided on the outside of the transducer housing will induce a field that drives the membrane likewise provided in the transducer housing. By providing the two driving coils electrically separated in the transducer housing a compact unit may be achieved and the two individual signals may be supplied to the transducer without interfering with each other. The two signals are hence supplied to the transducer in their desired undisturbed form and the resulting acoustic output signal will show a superpositioning of the two signals. In this manner it is possible to add a digital and an analog signal to each other, without disturbing one or both of the signals, and achieve a desired combined signal. It is of course also possible to combine two digital or two analog signals and still achieve an improvement in the combined signal.
- Although the invention in the foregoing description of a preferred embodiment has been explained as implemented in a hearing aid, the invention is applicable to other types of personal communication equipment, such as headsets and mobile telephones.
Claims (15)
- A method for output signal generation in a communication device in which a primary signal is generated in a primary signal path and a secondary signal is generated in a secondary signal path, the method comprising: adding the primary signal to the secondary signal by adding a first magnetic field to a second magnetic field.
- A method according to claim 1, comprising generating the secondary signal as an analog signal.
- A method according to claim 1 or 2, where the primary signal is a digital signal.
- A method according to any of the claims 1-3, comprising picking up at least one acoustic or magnetic signal by the communication device.
- A communication device comprising:first signal processing means for processing the first electrical signals;second signal generating means for generating a second electrical signal;output means for outputting the processed electrical signals;where means are provided for generating a first magnetic field and a second magnetic field in connection with the output means.
- A device according to claim 5, where at least one microphone is provided for picking up at least one acoustic signal.
- A device according to claim 5 or 6, where a further microphone is provided for picking up a further acoustic signal.
- A device according to any of the claims 5-7, where a processor is provided for establishing one or more characteristics of an incoming signal.
- A hearing aid comprising:a first microphone adapted to pick up acoustical signals outside the ear of the hearing aid user and transform these into first electrical signals;first signal processing means for processing the first electrical signals;second signal generating means for generating a second electrical signal;output means for outputting the processed electrical signals;where means are provided for generating a first magnetic field and a second magnetic field.
- A hearing aid according to claim 9, where the output means is a receiver comprising at least two driving coils; where one coil is adapted to generate a first magnetic field in correspondence with a first signal; and where another coil is adapted to generate a second magnetic field in correspondence with a second signal.
- A hearing aid according to claim 9 or 10, where the second signal path comprises means for processing an analog signal.
- A hearing aid according to claim 9 or 10, where the first signal path comprises means for generating and processing a digital signal.
- A hearing aid according to claim 9, where the second signal generating means comprises a second microphone and a second signal processor.
- An output transducer for a communication device, the transducer comprising:a membrane, adapted to oscillate in correspondence to input signals;at least two electrically separated driving coils;where one coil is adapted to generate a first magnetic field in correspondence with a first input signal;and where another coil is adapted to generate a second magnetic field in correspondence with a second input signal.
- A transducer according to claim 14, where the membrane and the two electrically separated coils are contained in a single housing.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK00610046.5T DK1154673T3 (en) | 2000-05-12 | 2000-05-12 | Combination of two signals in a hearing aid |
EP00610046.5A EP1154673B1 (en) | 2000-05-12 | 2000-05-12 | Combining two signals in a hearing aid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00610046.5A EP1154673B1 (en) | 2000-05-12 | 2000-05-12 | Combining two signals in a hearing aid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1154673A1 true EP1154673A1 (en) | 2001-11-14 |
EP1154673B1 EP1154673B1 (en) | 2017-02-22 |
Family
ID=8174388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00610046.5A Expired - Lifetime EP1154673B1 (en) | 2000-05-12 | 2000-05-12 | Combining two signals in a hearing aid |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1154673B1 (en) |
DK (1) | DK1154673T3 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1251714A2 (en) † | 2001-04-12 | 2002-10-23 | Gennum Corporation | Digital hearing aid system |
WO2004021740A1 (en) * | 2002-09-02 | 2004-03-11 | Oticon A/S | Method for counteracting the occlusion effects |
GB2429600A (en) * | 2005-08-26 | 2007-02-28 | Jin-Chou Tsai | Low-noise transmitting receiving earset or earpiece |
DE102006059138A1 (en) * | 2006-12-14 | 2008-06-26 | Siemens Audiologische Technik Gmbh | Hearing aid and/or ear protection device comprises an output conversion unit having two separate signal inputs |
EP2028877A1 (en) | 2007-08-24 | 2009-02-25 | Oticon A/S | Hearing aid with anti-feedback system |
CN101795430A (en) * | 2009-02-04 | 2010-08-04 | 奥迪康有限公司 | Hearing device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4449018A (en) | 1982-06-07 | 1984-05-15 | Stanton Austin N | Hearing aid |
EP0137550A1 (en) | 1983-09-15 | 1985-04-17 | Koninklijke Philips Electronics N.V. | Loudspeaker system and loudspeaker for converting an n-bit digitized electric signal into an acoustic signal |
JPH05244696A (en) | 1992-02-28 | 1993-09-21 | Hitachi Ltd | Digital hearing aid |
JPH06233389A (en) | 1993-02-05 | 1994-08-19 | Sony Corp | Hearing aid |
US5949889A (en) | 1997-09-02 | 1999-09-07 | The United States Of America As Represented By The Secretary Of The Navy | Directional hearing aid |
US20010017922A1 (en) | 1999-12-08 | 2001-08-30 | Kim Jeong Uk | Speaker having a device capable of generating sound and vibration |
-
2000
- 2000-05-12 EP EP00610046.5A patent/EP1154673B1/en not_active Expired - Lifetime
- 2000-05-12 DK DK00610046.5T patent/DK1154673T3/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4449018A (en) | 1982-06-07 | 1984-05-15 | Stanton Austin N | Hearing aid |
EP0137550A1 (en) | 1983-09-15 | 1985-04-17 | Koninklijke Philips Electronics N.V. | Loudspeaker system and loudspeaker for converting an n-bit digitized electric signal into an acoustic signal |
JPH05244696A (en) | 1992-02-28 | 1993-09-21 | Hitachi Ltd | Digital hearing aid |
JPH06233389A (en) | 1993-02-05 | 1994-08-19 | Sony Corp | Hearing aid |
US5949889A (en) | 1997-09-02 | 1999-09-07 | The United States Of America As Represented By The Secretary Of The Navy | Directional hearing aid |
US20010017922A1 (en) | 1999-12-08 | 2001-08-30 | Kim Jeong Uk | Speaker having a device capable of generating sound and vibration |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 003 (E - 1485) 6 January 1994 (1994-01-06) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 608 (E - 1633) 18 November 1994 (1994-11-18) * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1251714A2 (en) † | 2001-04-12 | 2002-10-23 | Gennum Corporation | Digital hearing aid system |
EP1251714B2 (en) † | 2001-04-12 | 2015-06-03 | Sound Design Technologies Ltd. | Digital hearing aid system |
WO2004021740A1 (en) * | 2002-09-02 | 2004-03-11 | Oticon A/S | Method for counteracting the occlusion effects |
US7477754B2 (en) | 2002-09-02 | 2009-01-13 | Oticon A/S | Method for counteracting the occlusion effects |
GB2429600A (en) * | 2005-08-26 | 2007-02-28 | Jin-Chou Tsai | Low-noise transmitting receiving earset or earpiece |
GB2429600B (en) * | 2005-08-26 | 2007-10-31 | Jin-Chou Tsai | Low Noise Transmitting Receiving Earset |
DE102006059138B4 (en) * | 2006-12-14 | 2010-09-09 | Siemens Audiologische Technik Gmbh | Hearing aid and / or hearing protection device with an audio input |
DE102006059138A1 (en) * | 2006-12-14 | 2008-06-26 | Siemens Audiologische Technik Gmbh | Hearing aid and/or ear protection device comprises an output conversion unit having two separate signal inputs |
EP2028877A1 (en) | 2007-08-24 | 2009-02-25 | Oticon A/S | Hearing aid with anti-feedback system |
AU2008203193B2 (en) * | 2007-08-24 | 2010-12-16 | Oticon A/S | Hearing aid with anti-feedback system |
US8130992B2 (en) | 2007-08-24 | 2012-03-06 | Oticon A/S | Hearing aid with anti-feedback |
CN101795430A (en) * | 2009-02-04 | 2010-08-04 | 奥迪康有限公司 | Hearing device |
EP2217006A1 (en) * | 2009-02-04 | 2010-08-11 | Oticon A/S | A hearing device |
US8644540B2 (en) | 2009-02-04 | 2014-02-04 | Oticon A/S | Hearing device |
Also Published As
Publication number | Publication date |
---|---|
DK1154673T3 (en) | 2017-05-01 |
EP1154673B1 (en) | 2017-02-22 |
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