CN103546849B - Frequency-no-masking hearing-aid for double ears - Google Patents
Frequency-no-masking hearing-aid for double ears Download PDFInfo
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Abstract
This invention discloses a frequency-no-masking hearing aid for ears. The novel double-ear hearing aid uses a new method to compensate the comprehension of a hearing-impaired user in noise. The novel method comprises steps of providing at least microphone audio frequency signal (18,20) by responding to the sound; and providing at least one evaluation of evaluations of object signal (26) and noise signals (30) based on at least one microphone audio frequency signal (18,20). At least one of the evaluations of the object signals (26) and the noise signals (30) is modified by the following methods of modifying the evaluation of the object signal (26) and the evaluation of the noise signal (30) which are positioned within different frequency bands; sending an evaluation of modified the object signal to the drumhead of the user of the double-ear hearing aid (10); and sending another modified evaluation of the noise signal of the drumhead of the user.
Description
Technical field
There is provided a kind of new binaural hearing aid system, the reason of system balance hearing impaired user
The forfeiture of the ability of voice of the solution in noise.
Background technology
The individual of hearing impaired is often subjected at least two obvious problems：Hearing loss, this is
Increase on hearing threshold level；And compared with the individual of normal hearing for understanding
The forfeiture of the ability of the high-level voice in noise.For the patient of most of hearing impaireds,
The performance in intelligibility of speech test in noise is poorer than the people of normal hearing, even if by putting
Greatly come recover enter sound audibility.Personal speech reception threshold（SRT）Be for
50% correct word identification is obtained in hearing test in noise and is needed in the signal for being presented
The signal to noise ratio wanted.
Amplify the digital deaf-aid of the today processed with compressed signal for audition is received using multichannel
The individual of damage can easily recover the audibility for amplifying sound.Therefore by causing previously can not
The voice clue listened is audible, can improve the hearing ability of patient.
For understanding that the forfeiture of the ability of the voice in noise is most of hearing aid users today
Sixty-four dollar question.The traditional approach that SRT is improved in instrument is to apply Wave beam forming
Or frequency spectrum reduces technology.
In the first scenario, at least the one of fixed or adaptive and multiple filter combinations
Individual mike be used for strengthen from assume target direction signal, and while suppress it is all its
His signal.
In frequency spectrum reduction technology, target is to set up the estimation of long-term noise frequency spectrum, and is reduced
Wherein fast-opening target signal power is less than the gain in the frequency band of long-term noise power.Even if these
Method is very different from terms of technology viewpoint, but they still have public target；Strengthen mesh
Mark signal and remove noise jamming.
These methods can not consider the wish of listener, and may remove listener and attempt to pay close attention to
Audio signal part.
The content of the invention
Below, the method for disclosing the enhanced new and invention of echo signal.The new method
Using the ability of the auditory system of the people concentrated in echo signal.Also disclose that a kind of use should
New and invention the binaural hearing aid system of new method.
Through the disclosure, echo signal is the signal for representing the sound that people expects to listen to.
Voice, music and sound are in nature the examples of echo signal.
Through the disclosure, masking signal is also the signal for representing sound；However, the sound is people
The sound for disturbing with echo signal in an undesired manner is perceived, the undesirable mode is for example
So that people's indigestion or appreciation echo signal.
The masking signal can be background sound, the brouhaha in restaurant, music（When voice is
During echo signal）, traffic noise etc..
Largely process to promote to listen to complicated sound by the ears in auditory system
.Because the diffracting effect of auricle, external ear, head and trunk and because in the environment that echoes
Reflecting effect, clue is provided to sound field, and for given pair as if height is personalized
's.
Most important clue in ears process is the time difference between ear（ITD）Electricity and between ear
Adjustment（ILD）.ITD is derived from the difference in the distance in source to two ears.The clue is until about
1.5kHz is mainly beneficial, and more than this frequency, auditory system is no longer able to solve ITD lines
Rope.
Level difference is the result of diffraction, and the relative position by ear compared with source determines.
The clue is dominant in more than 2kHz, but auditory system is for the ILD on whole frequency spectrum
On change it is comparably sensitive.
Argue, hearing impaired object most benefits from ITD clues, because hearing loss
It is intended to less serious in low frequency.
In new binaural hearing aid, by different bands to the user of binaural hearing aid
Eardrum output echo signal and masking signal improving the intelligibility of speech.
By this way, by being different frequency bands reducing because echo signal by Signal separator
Shelter with there is caused energy while masking signal.
It has been shown that for the language as echo signal and the Gaussian noise as masking signal,
Can for normal hearing listener obtain 15dB SRT improvement, and for
The listener of hearing impaired obtains the improvement of the SRT of about 10dB.
The improvement is obtained in the case where a part for signal is not removed；But, in the following manner
Target and masking signal is presented to the eardrum of user：The auditory system of the auditory system of user can be with
Perform natural noise to reduce, and echo signal is separated with masking signal.
It thus provides a kind of new sonifer, including：
At least one mike, in response to the sound received at least one mike
Sound and at least one microphone audio signal is provided,
Signal separation unit, its be configured to based at least one microphone audio signal come
The estimation of echo signal and masking signal is provided,
Frequency modification unit, it is configured to change the echo signal and the masking signal
The frequency content of at least one of estimation so that when being processed by the frequency modification unit,
Substantially the echo signal and estimated masking signal estimated by exporting in different bands,
Receptor, for the echo signal that will be changed and exported by the frequency modification unit
Estimation and the masking signal estimation Combination conversion for will be to the binaural hearing aid system
User ear in one transmission acoustic signal.
In one embodiment, when for example sonifer frequency band more than 51% in frequency band
Majority in and in the major part of the time more than 51% of such as time, in frequency band
In one in the signal of such as echo signal in and another in frequency band for example
Another in the signal of masking signal has 20% of the signal level less than another signal
Signal level, the 15% of the signal level of all such as less than another signals, it is preferably less than another
The 5% of the signal level of the 10% of the signal level of individual signal, even more preferably less than another signal,
More preferably less than the signal level of another signal 1% when, it is believed that two signals are substantially in institute
It is output in the different frequency band for stating sonifer.
The signal level can be RMS value, peak value, the average width limited in predetermined amount of time
Angle value etc..
The new sonifer may be constructed the first sonifer of new binaural hearing aid system, institute
State new binaural hearing aid system and further there is the second sonifer, second sonifer includes
At least one mike, at least one mike is used in response at least one wheat
The sound received at gram wind providing corresponding at least one microphone audio signal, and wherein
Transceiver in second sonifer is connected to for sending out to first sonifer
Send the signal for representing at least one microphone audio signal, and wherein
Transceiver in first sonifer is connected to represent that described second helps for receiving
Listen the signal of at least one microphone audio signal of device, and wherein
The signal separation unit be configured to based on first and second sonifer it is described extremely
A few microphone audio signal is come the estimation for providing the echo signal and the masking signal
Estimate.
And, there is provided a kind of method of new and invention, including step：
At least one microphone audio signal is provided in response to sound, and
The estimation of echo signal and masking signal is provided based at least one audio signal,
It is resident substantially with the estimation of the modified echo signal and the estimation of the masking signal
Mode in different frequency bands comes the estimation to the echo signal and the estimation of the masking signal
At least one of carry out frequency modification, and
To one in the eardrum of the people estimation for sending the modified echo signal and described cover
Cover the combination of the estimation of signal.
The frequency modification unit can be configured to the estimation of the echo signal and described cover
In the estimation of signal frequency displacement is covered to the estimation of wherein described echo signal and described shelter letter
Number estimation in another frequency field being substantially not present.
Further or as an alternative, the frequency modification unit can be configured to described in determination
The pitch of the estimation of the estimation and the masking signal of echo signal（pitch）And overtone, and
One in the estimation of echo signal described in frequency displacement and the estimation of the masking signal so that described
The pitch and overtone of the signal of frequency displacement is resided between the corresponding pitch of another signal and overtone.
Further or as an alternative, the frequency modification unit can include wave filter group, and institute
State the frequency of the estimation that frequency modification unit can be configured to, with being assigned to the echo signal
Estimation with the echo signal is filtered, and utilize the estimation for being assigned to the masking signal
Other band division filters described in masking signal estimation.
The wave filter group can be tuned to the auditory filter for being intended to user.
Also it has been shown that phase place and level can between the relative ear of manipulation of objects signal and masking signal
To significantly improve the intelligibility of speech, the echo signal is the signal that listener expects to listen to,
The masking signal is the signal that listener is interference.Seem to seem that auditory system is certain
It is adapted to separate the signal encoded with difference ITD and ILD, to perform covering for natural type
Reduction is covered, with the convenient concern echo signal.
If it has been found that echo signal is anti-phase presented described in two ears, i.e. 180 ° of phase shift,
And masking signal is in phase presented, then compared with when two signals when homophase in two ears is presented
Can realize that the ears masking level of 13dB is poor（BMLD）Increase.Depending on masking signal
Type, the improvement of the 20dB of BMLD can be realized.
The reverse situation that wherein masking signal is out of phase presented and echo signal is in phase presented is produced
The lower slightly performance of life.
Therefore, the frequency modification unit can also be configured to relative to the masking signal
Estimate the estimation of echo signal described in phase shift.
By this way, the ability that user understands the voice in noise is further improved.
For example, if echo signal is designated as S and masking signal is designated as N, enter
The acoustical signal for entering is S+N.Based on acoustical signal S+N, echo signal S is estimated, and will
The estimation is expressed as ES.The estimation of the masking signal is appointed as into EN, and can be led to
Cross from the acoustical signal S+N and deduct the estimation ES to determine EN.
Below, S, N, ES, EN are specified before the frequency modification in the frequency modification unit
Signal in each or frequency modification after signal in each.
By deducting ES twice from the signal S+N for entering, as a result it is：S+N-ES-ES, it is described
The estimation ES of echo signal can be relative to 180 ° of the estimation EN phase shifts of the masking signal.Cause
S is approximately equal to for ES, so the result subtracted each other is approximately：N-ES, it is approximately equal to-ES+EN,
The estimation ES of i.e. described echo signal relative to the masking signal estimation phase shift substantially
180°.This behaviour can be performed before or after the frequency modification in the frequency modification unit
Make.
It should be noted that the phase shift of accurate or approximate 180 ° should not be asked to obtain the aobvious of SRT
Writing improves；But, obtained using the phase in-migration in 135 ° -225 ° of such as 150 ° -210 ° of scope
Obtain such improvement.
Now, primary signal S+N can be presented to user ear, and it is possible to
Another ear is presented the signal N-ES of phase shift, or more accurately S+N-2ES, to be disclosed as above
Improve BMLD and SRT.
As an alternative, both echo signal S and masking signal N can be estimated, and can to
One ear at family is presented the sum for estimating ES+EN, and it is possible to phase is presented to another ear
Move and-ES+EN, to be disclosed as above BMLD and SRT is improved.Can be in the frequency modification
This operation is performed before or after frequency modification in unit.
Echo signal S and the masking signal can be exchanged so that the masking signal
Estimation is phase-shifted, rather than the echo signal, and to be disclosed as above BMLD and SRT is improved；
However, compare reducing performance with echo signal S-phase described in phase shift.
Through the disclosure, when a signal is the function of another signal one letter is thought
Number described another signal is represented, for example, can be by the analog digital conversion of another signal
Or digital-to-analogue conversion is forming one signal；Or, can be by from another acoustic signal
Conversion to electronic signal or vice versa is as the same forming one signal；Or, can pass through
Analog or digital filters or mixes described another signal to form one signal；Or,
Can by it is described another to the change of frequency transformation etc. bring to form one letter
Number；Etc..
And, such as the signal by particular electrical circuit process in signal processor can pass through can
Formed from the source of the signal for being discussed to the electricity of such as signal processor for being discussed for identification
The title of any analog or digital signal of a part for the signal path of the input on road is recognizing.
For example, the output signal of mike（That is microphone audio signal）Can be used for identification formed from
The output of the mike to its arrive the signal processor input signal path a part
Any analog or digital signal, the mike sound of the analog or digital signal including pretreatment
Frequency signal.
At least one mike can be made up of single mike；However, it is preferred that
At least one mike includes single mike, such as multiple mikes, such as two wheats
Gram wind.At least one mike can have more than two mikes, to improve target letter
Number and masking signal separation.
In order to improve signal enhancing, second sonifer can also include at least one mike,
For providing microphone audio signal in response to the sound received at corresponding mike.
In this case, the transceiver of first sonifer is connected to represent described for receiving
The signal of the microphone audio signal of the second sonifer, and the signal separation unit quilt
It is configured to the audio signal of first and second sonifer to provide the target letter
Number estimation and the masking signal estimation.
Preferably, the frequency modification unit with phase in-migration estimating relative to the masking signal
The estimation of echo signal described in meter phase shift, the scope of the phase shift be from 150 ° to 210 °, it is more excellent
Choosing, the phase shift is approximately equal to 180 °, and is most preferably equal to 180 °.
Improvement as the SRT of Phase-shift function has maximum at 180 °；However, the function
It is the sinusoidal shape with flat maximum so that by phase of the scope from 150 ° to 210 °
Move the improvement for obtaining and be close to maximum improvement.Therefore, phase shift need not be accurately 180 °, but excellent
Selection of land has in scope is from 135 ° to 225 °, the value more preferably from 150 ° to 210 °.
Preferably, user two ears with opposite phase, i.e. relative to each other 180 ° of phase shift ground
The target state estimator is presented, and masking signal estimation is in phase presented at two ears of user.
The signal separation unit can be configured to based on known in the field that noise reduces
The spectral characteristic of audio signal is providing estimation.However, according to the new method, to
The masking signal is not suppressed to estimate in the output that family is presented；But, used with being disclosed as above to improve
Target state estimator is presented to user for the mode of the SRT at family and masking signal is estimated.
The signal separation unit can be configured to based on known in the field that noise reduces
The statistical property of audio signal is providing estimation.However, according to the new method, to
The masking signal is not suppressed to estimate in the output that family is presented；But, to improve the SRT of user
Mode target state estimator and masking signal be presented to user estimate.
The signal separation unit can include Beam-former, and the Beam-former can
To be configured to be provided based on the microphone audio signal of first and second sonifer
The estimation.The Beam-former of the signal separation unit and traditional Beam-former
Difference is：The masking signal is not suppressed to estimate in the output presented to user；But,
Target state estimator and masking signal estimation is presented to user in the way of the SRT for improving user.
It is right that the Beam-former is combined as the microphone audio signal exported by multiple mikes
There is the target of different sensitivity in the sound source on the different directions relative to multiple mikes
Signal.Through the disclosure, it is represented as the curve of the sensitivity of the change of the function in direction
Directional diagram.Generally, directional diagram has at least one that wherein microphone signal is cancelled out each other substantially
Direction.Through the disclosure, such direction be represented as short side to.Directional diagram can be according to institute
State the quantity of mike in multiple mikes and according to signal processing including several short sides
To.
The Beam-former can have consolidating for the directional diagram fixed relative to the head of user
Standing wave beamformer.The Beam-former can for example be based at least two mikes, described
At least two mikes have the forward direction in user, i.e. the forward-looking direction of user has most
Big value and in the opposite direction, the directional diagram with null value upwards i.e. after user.
The Beam-former can be based on more than two mikes, and can include using nothing
The mike of two sonifers of line or cable communicating technology.The distance increased between mike
Can be utilized to form the directional diagram with narrow wave beam, for providing target state estimator and sheltering
The improvement of Signal estimation is spatially separating.The tradition output of the Beam-former is used as
Target state estimator, and can be by the microphone audio of a mike from multiple mikes
Signal deducts target state estimator to provide the masking signal estimation.
Mike and the Beam-former cooperation when two sonifers of binaural hearing aid system
When, it is necessary to corresponding microphone signal of substantially simultaneously sampling.Phase in two sonifers
The little time shift up to 20-30 microseconds between the sampling instant of microphone signal is answered to cause in ripple
Appreciable displacement on Shu Fangxiang.And, it is inevitable if operating asynchronously sonifer
Lentamente time change that ground occurs, between the sampling instant of corresponding microphone signal
Time shift will cause to seem to drift about and focus on the sound wave beam on alternating direction.
Therefore, the sonifer of binaural hearing aid system can be by synchronization, such as example in WO
It is disclosed more closely in 02/07479.
The Beam-former can include sef-adapting filter, and the sef-adapting filter is matched somebody with somebody
The corresponding microphone audio signal of filtration is set to, and by for the corresponding of Adaptive beamformer
Filter coefficient be adapted to sound source.For example, the Beam-former can be adapted to optimization
Signal to noise ratio.
The Beam-former that can be adapted to makes it possible to user in hearing aid device system mobile same
When focus on moving sound or focus on the sound source not moved.And, the Wave beam forming that can be adapted to
Device can adapt in the change in acoustic environment, the appearance of such as new sound source, masking signal or
The movement of the disappearance of noise source or masking signal or noise source relative to the user of hearing aid device system.
Be able to can be modeled as from predetermined mesh in the signal received at least one mike
Mark direction echo signal plus shelter or noise combination hypothesis under design adaptive beam shape
Grow up to be a useful person：
yi(n)=hi(n)*s(n)+vi(n)
Wherein, hiN () is from the source of transmission signal s (n) to the pulse of the sound transmission of i-th mike
Response, and viN () is the masking signal at same mike.The masking signal can be by
The other kinds of noise of direction noise and such as diffusion noise or babble noise is constituted.
Filter coefficient can be adaptively determined by solving following optimization problem：
Submit to
Can be declined or other kinds of numerical value using lowest mean square, recursive least-squares, steepest
Optimized algorithm is adaptively being found the solution optimized for this.
Preferably, in the following manner configuring the signal separation unit：Echo signal is estimated
The estimation of meter and masking signal includes the spatial cues of primary signal.Appropriate Mike can be passed through
Wind arrange and/or microphone signal appropriate pre/post process realizing this point.
Each sonifer in the binaural hearing aid can have signal separation unit so that
The estimation of echo signal and the estimation of masking signal can be obtained in each of the sonifer,
Preferably there are correct spatial cues.
Once having determined that target and masking signal are estimated, then improve user's to be disclosed as above
The mode of SRT the signal is presented to user.
The new binaural hearing aid system can include the sonifer of multichannel first, wherein, will
Microphone audio signal is divided into multiple frequency channels.
Accordingly, can provide in each frequency channel of multiple frequency channels or can be with
Single echo signal is provided in one or more frequency channels for selecting of multiple frequency channels
Estimate and masking signal is estimated, or, one or more echo signals can be provided and estimated and covered
Cover Signal estimation for multiple frequency channels selection frequency channel one or more are corresponding
Group, or target letter can be provided based on all frequency channels of multiple frequency channels
Number estimate and masking signal estimate.
The plurality of frequency channel can include the frequency channel of distortion, for example, all of frequency
Passage can be the frequency channel of distortion.
The new binaural hearing aid system can be provided in addition according to other hearing loss compensation
The circuit that traditional method is used so that the new circuit or other traditional circuits can be chosen
To be used for appropriate operation in different types of acoustic environment.Different acoustic environments can be wrapped
Include voice, multiple crosstalk, restaurant brouhaha, music, traffic noise etc..
The new binaural hearing aid system can for example include digital signal processor（DSP）,
Its process is controlled by selectable signal processing algorithm, and each of the algorithm has for adjusting
The various parameters that whole performed actual signal is processed.In each frequency of multichannel sonifer
Gain in passage is the example of such parameter.
One in selectable signal processing algorithm operates according to the new method.
For example, various algorithms can be provided for traditional noise suppressed, i.e. undesirable
Or the decay and the amplification of echo signal of the signal of noise.
The microphone audio signal obtained from different acoustic environments can have very different spy
Property, such as average and maximum sound pressure level（SPL）And/or frequency content.Therefore, each type
Acoustic environment can be associated with specific program, wherein, the algorithm of signal processing algorithm ginseng
Several specific settings provides the sound of the process of the optimum signal quality in specific sound environment
Sound.Parameter as one group can be typically comprised and selected with wideband gain, angular frequency or frequency
The related parameter of the slope of algorithm filter and control such as automatic growth control（AGC）Algorithm
Compression ratio and flex point parameter.
Initial fitting ession for telecommunication that can be in the office of assignment person determines the every of the algorithm
The signal processing characteristic of one, and the signal processing characteristic is programmed into into new ears hearing aid
In nonvolatile storage in device system.
The new binaural hearing aid system can have user interface, such as sonifer shell
Button, switching switch etc. or remote control so that the use of the new binaural hearing aid system
Family can select one in obtainable signal processing algorithm, to obtain in the sound for being discussed
Desired hearing loss compensation in environment.
The sound environment classification of user can be automatically many by the new binaural hearing aid system
One in individual sound environment classification, such as voice, multiple crosstalk, restaurant brouhaha, music,
Traffic noise etc., and can therefore automatically select proper signal process as known in the art
Algorithm.
Description of the drawings
Below, the preferred embodiments of the present invention are described in greater detail with reference to the attached drawings, in the accompanying drawings：
Fig. 1 schematically illustrates exemplary new sonifer,
Fig. 2 illustrates the curve of the masking signal of frequency displacement,
Fig. 3 illustrates another curve of the masking signal of frequency displacement,
Fig. 4 illustrates the target and the curve of masking signal of band filter and bandpass filtering,
Fig. 5 schematically illustrates exemplary new binaural hearing aid system,
Fig. 6 schematically illustrates exemplary new binaural hearing aid system,
Fig. 7 schematically illustrates the signal with adaptive beam former based on two mikes
Separative element,
Fig. 8 schematically illustrates the signal separation unit based on four mikes, and
Fig. 9 schematically illustrates exemplary new binaural hearing aid system.
The present invention is described more fully with below with reference to accompanying drawing, in the accompanying drawings, is shown showing for the present invention
Example property embodiment.However, the present invention can be implemented in different forms, and should not be by
It is considered limited to embodiment set forth herein.But, these embodiments are provided so that the disclosure
It is thorough and complete, and will comprehensively passes on the present invention's to those skilled in the art
Scope.Through everywhere, similar drawing reference numeral indicates similar element.Therefore, will not be relative
Similar element is described in detail in the explanation of each accompanying drawing.
Specific embodiment
Fig. 1 schematically illustrates the example of new binaural hearing aid 10, and the binaural hearing aid 10 is grasped
Make to strengthen echo signal using the ability concentrated in echo signal of the auditory system of people.
In the new sonifer 10 of diagram, by different bands to binaural hearing aid
The eardrum of user exports echo signal and masking signal to improve the intelligibility of speech.
By this way, by the way that Signal separator is reduced by presenting simultaneously to different frequency bands
The energy that echo signal and masking signal cause is sheltered.
It has been shown that for the language as echo signal and the Gaussian noise as masking signal,
Can for normal hearing listener obtain 15dB SRT improvement, and for
The listener of hearing impaired obtains the improvement of the SRT of approximate 10dB.
The improvement is obtained in the case where a part for signal is not removed；But, in the following manner
Target and masking signal is presented to the eardrum of user：The auditory system of the auditory system of user can be with
Perform natural noise to reduce, and echo signal is separated with masking signal.
Illustrated new sonifer 10 includes mike 14, in response in mike 14
The sound that place receives is providing microphone audio signal 18.Microphone audio signal 18 can be at this
Known corresponding prefilter in field（It is not shown）It is middle by pre-filtering, and be imported into
Signal separation unit 12.
Signal separation unit 12 is configured to provide echo signal based on microphone audio signal 18
26 and the estimation of masking signal 30, frequency modification unit 52 is configured to change echo signal 26
With the frequency content of at least one of the estimation of masking signal 30 so that by frequency modification
During the process of unit 52, the echo signal 26 of estimation and the masking signal 30 estimated are basic not
With being output in frequency band.
It is configured in the hearing loss of known hearing loss compensation in the field of sonifer
Processor 46 by the echo signal 26 of the estimation changed by frequency modification unit 52 and estimate cover
The combination 32 for covering signal 30 is processed as hearing loss compensating audio signal 34, and exports transducing
Device 48, is in the example shown receptor 48, by the output 34 of hearing loss processor 46
Be converted to the voice output signal that the eardrum of the user to wear hearing aid 10 sends.
Frequency modification unit 52 can be configured to the estimation of echo signal 26 and masking signal
A frequency displacement in 30 estimation is estimated to the wherein estimation of echo signal 26 and masking signal 30
In another frequency field being substantially absent from meter, letter is sheltered in the estimation shown as frequency displacement
Shown in numbers 30 Fig. 2.
Further or as an alternative, frequency modification unit 52 can be configured to determine target letter
The pitch and overtone of the estimation of numbers 26 estimation and masking signal 30, and frequency displacement echo signal
One in 26 estimation and the estimation of masking signal 30 so that the pitch and overtone of frequency shift signal
Reside between the corresponding pitch and overtone of another signal shown in Fig. 3.
Further or as an alternative, frequency modification unit 52 can include filtering as shown in Figure 4
Device group, and frequency modification unit 52 can be configured to, with being assigned to echo signal 26
Estimation band division filter echo signal estimation, and using being assigned to masking signal 30
Estimate the estimation of other band division filter masking signals 30 of distribution.
The wave filter group can be tuned to the auditory filter for being intended to user.
By this way, the ability that user understands the voice in noise is improved.
The masking signal can be background sound, restaurant brouhaha, music（When voice is target
During signal）, traffic noise etc..
Mike 14 may alternatively be two mikes or with the wheat more than two mikes
The array of gram wind, to improve the separation of echo signal and masking signal.
Signal separation unit 12 can be configured to based on known in the field that noise is reduced
The spectral characteristic of audio signal is providing estimation.However, according to new method, being in user
Masking signal is not suppressed to estimate in existing output；But, in the way of the SRT for improving user to
User is presented target state estimator and masking signal is estimated.
Signal separation unit 12 can be configured to based on known in the field that noise is reduced
The statistical property of audio signal is providing estimation.However, according to new method, being in user
Masking signal is not suppressed to estimate in existing output；But, in the way of the SRT for improving user to
User is presented target state estimator and masking signal is estimated.
Signal separation unit 12 can include Beam-former.The wave beam of signal separation unit 12
Shaper is different from traditional Beam-former to be：Do not suppress in the output presented to user
Masking signal is estimated；But, target state estimator is presented to user in the way of the SRT for improving user
Estimate with masking signal.
The Beam-former can be the fixation with the directional diagram fixed relative to the head of user
Beam-former.The Beam-former can for example be based at least two mikes, it is described at least
With the forward direction in user, i.e. the forward-looking direction of user has maximum simultaneously to two mikes
And in the opposite direction, the directional diagram with null value upwards i.e. after user.
The Beam-former can be based on more than two mikes.The Beam-former it is traditional defeated
Go out and be used as target state estimator, and can be by a mike from multiple mikes
Microphone audio signal deduct target state estimator and estimate providing the masking signal.
The Beam-former can include sef-adapting filter, and it is configured to filter corresponding wheat
Gram wind audio signal, and the corresponding filter coefficient of Adaptive beamformer will be used for adapt to
In sound source.For example, the Beam-former can be adapted to optimize signal to noise ratio.
As described above, the wave filter wave beam that can be adapted to makes it possible to the user in hearing aid device system
Moving sound is focused on while mobile or focus on the sound source not moved.And, can be adapted to
Beam-former can adapt in the change in acoustic environment, the appearance of such as new sound source,
The disappearance of masking signal or noise source or masking signal or noise source are relative to hearing aid device system
The movement of user.
Preferably, in the following manner configuring the signal separation unit：The estimation of echo signal
Include the spatial cues of primary signal with the estimation of masking signal.Appropriate mike can be passed through
The appropriate pre/post process of arrangement and/or microphone signal is realizing this point.
Once have determined that target and masking signal are estimated, then improving the side of the SRT of user
Formula to user being presented the signal.
The new sonifer 10 can be multichannel sonifer, wherein, by microphone audio signal
It is divided into multiple frequency channels.
Accordingly, can provide in each frequency channel of multiple frequency channels or can be with
Single echo signal is provided in one or more frequency channels for selecting of multiple frequency channels
Estimate and masking signal is estimated, or one or more can be provided echo signals estimation and sheltered
Signal estimation for the frequency channel of the selection of multiple frequency channels one or more are corresponding
Group, or an echo signal can be provided based on all frequency channels of multiple frequency channels
Estimate and masking signal is estimated.
The plurality of frequency channel can include the frequency channel of distortion, and for example, all of frequency is led to
Road can be the frequency channel of distortion.
The new sonifer 10 can in addition provide the tradition side according to other hearing loss compensation
The circuit 46 that method is used so that the new circuit or other traditional circuits can be selected for
The appropriate operation in different types of acoustic environment.Different acoustic environments can include voice,
Multiple crosstalk, restaurant brouhaha, music, traffic noise etc..
The new sonifer 10 can for example include digital signal processor（DSP）, its process
Controlled by selectable signal processing algorithm, each of the algorithm is with performed for adjusting
Actual signal process various parameters.In each frequency channel of multichannel sonifer
Gain is the example of such parameter.
One in selectable signal processing algorithm grasps according to disclosed signal enhancing method
Make.
For example, various algorithms can be provided for traditional noise suppressed, i.e., it is undesirable or
The decay of the signal of noise and the amplification of echo signal.
The microphone audio signal obtained from different acoustic environments can have very different spy
Property, such as average and maximum sound pressure level（SPL）And/or frequency content.Therefore, each type
Acoustic environment can be associated with specific program, wherein, the algorithm of signal processing algorithm ginseng
Several specific settings provides the sound of the process of the optimum signal quality in specific sound environment
Sound.Parameter as one group can be typically comprised and selected with wideband gain, angular frequency or frequency
The related parameter of the slope of algorithm filter and control such as automatic growth control（AGC）Algorithm
Compression ratio and flex point parameter.
Initial fitting ession for telecommunication that can be in the office of assignment person determines each of the algorithm
Individual signal processing characteristic, and the signal processing characteristic is programmed into into new binaural hearing aid system
In nonvolatile storage in system.
The new binaural hearing aid 10 can have user interface, and such as sonifer shell is pressed
Button, switching switch etc. or remote control so that the user of the new binaural hearing aid system can
One in select obtainable signal processing algorithm, to obtain in the acoustic environment for being discussed
In desired hearing loss compensation.
The sound environment classification of user can be automatically multiple sound by the new sonifer 10
One in environment category, such as voice, multiple crosstalk, restaurant brouhaha, music, traffic
Noise etc., and can therefore automatically select proper signal Processing Algorithm as known in the art.
Fig. 5 illustrates the new binaural hearing aid system with first and second sonifer 10A, 10B
System 10.Second sonifer 10B has receptor 48B and transceiver（It is not shown）, transceiver
For receiving from the first sonifer 10A by the wired or wireless input transmitted to receptor 48B
Signal.Therefore, in the example shown, control to be helped by second by the first sonifer 10A
The acoustic output signal for listening device 10B to launch.
First sonifer 10A includes a mike 14, in response at mike 14
The sound of reception is providing microphone audio signal 18.Microphone audio signal 18 can be in ability
Known corresponding prefilter in domain（It is not shown）It is middle by pre-filtering, and be imported into letter
Number separative element 12.Microphone audio signal of the signal separation unit 12 based on possible pre-filtering
18 providing the estimation of echo signal 26 and the estimation of masking signal 30, and to frequency modification
The output estimation of unit 52.
Frequency modification unit 52 is changed the frequency of the estimation of echo signal 26 and masking signal 30 and is contained
Amount so that substantially in different bands the echo signal 26 of output estimation and estimate shelter letter
Numbers 30, for example distinguish as illustrated in figs. 2-4.
In first adder 42, the estimation of echo signal 26 is added to estimating for masking signal 30
Meter, its at least one by frequency modification, and export and be imported into output transducer 48,
Output transducer 48 is converted to the output of first adder 42 to wearing dual-earpiece hearing aid device system
The acoustic output signal that the eardrum of 10 user sends.
And, in second adder 50,180 ° of estimation and the phase shift from masking signal 30 is right
Should deduct the estimation of echo signal 26, it is at least one by frequency modification, and the second addition
The output of device 50 is sent to output transducer 48B, to be converted to acoustic output signal, the sound
Learn output signal to be sent by another eardrum of from the user to wearing dual-earpiece hearing aid device system 10.With
This mode, improves BMLD and SRT.
The estimation of echo signal 26 and the estimation of masking signal 30 can be exchanged so that shelter letter
Numbers 20 estimation was phase-shifted 180 ° before be presented in the eardrum of user, substituted mesh
The phase shift of the estimation of mark signal 26.The improvement on BMLD and SRT for obtaining by this way
Less than the improvement that the phase shift by the estimation of echo signal 26 is obtained.
Signal separation unit 12 can be configured to based on microphone audio signal time domain, frequency
Spectrum and/or statistical property are such as known in noise reduction field providing estimation.Alternatively,
Can be to further in the corresponding signal application being input to before corresponding receptor 48,48B
Process, for example, the hearing loss for corresponding signal is compensated, public such as in the field of sonifer
Know.
In figure 6 shown new binaural hearing aid system 10 is helped similar to shown in Figure 5
Device system is listened, except following facts：Exported by the mike 14B in the second sonifer 10B
Microphone audio signal 18B by it is wired or wireless transmission be sent to the first sonifer 10A,
And signal separation unit 12 is imported into, so that signal separation unit 12 can for example by such as
Under Wave beam forming described further the estimation of echo signal and the estimation of masking signal 30 are based on
The microphone audio signal 18,18B of two possible pre-filterings.When user is in the corresponding ear of user
First and second are worn in the desired positions of the first and second sonifer 10A and 10B at piece to help
When listening device 10A and 10B, the relatively large distance between mike 14,14B has been caused can
Can form narrow beam, and therefore allow well being spatially separating for echo signal and masking signal.
Frequency modification unit 52 is changed the frequency of the estimation of echo signal 26 and masking signal 30 and is contained
Amount so that substantially in different bands the echo signal 26 of output estimation and estimate shelter letter
Numbers 30, for example distinguish as illustrated in figs. 2-4.
In first adder 42, the estimation of echo signal 26 is added to estimating for masking signal 30
Meter, its at least one by frequency modification, and export and be imported into output transducer 48,
Output transducer 48 is converted to the output of first adder 42 to wearing dual-earpiece hearing aid device system
The acoustic output signal that the eardrum of 10 user sends.
And, in second adder 50,180 ° of estimation and the phase shift from masking signal 30 is right
Should ground deduct the frequency displacement estimation of echo signal 26, its at least one by frequency modification, and second
The output of adder 50 is sent to output transducer 48B, to be converted to acoustic output signal,
The acoustic output signal is sent out by another eardrum of from the user to wearing dual-earpiece hearing aid device system 10
Send.By this way, BMLD and SRT is improved.
The estimation of echo signal 26 and the estimation of masking signal 30 can be exchanged so that shelter letter
Numbers 20 estimation was phase-shifted 180 ° before be presented in the eardrum of user, substituted mesh
The phase shift of the estimation of mark signal 26.The improvement on BMLD and SRT for obtaining by this way
Less than the improvement that the phase shift by the estimation of echo signal 26 is obtained.
Signal separation unit 12 can be configured to based on time domain, the frequency spectrum of microphone audio signal
It is such as known in noise reduction field and/or statistical property is providing estimation.Alternatively, may be used
With to further locating in the corresponding signal application being input to before corresponding receptor 48,48B
Reason, for example, the hearing loss for corresponding signal is compensated.
Fig. 7 is schematically illustrated including the adaptive beam former with two mikes 14,16
10 digital signal separative element 12.
Before Wave beam forming in traditional prefilter 22,24 pre-filtering microphone audio signal
18、20.Microphone audio signal 18,20 can be before or after prefilter 22,24
By analog-digital converter（It is not shown）Digitized.Turn before and after pre-filtering and in modulus
Signal before and after changing all is termed as microphone audio signal.
The output 26 of the first subtractor 28 is using Adaptive beamformer from the target direction for assuming
Produce the estimation of echo signal.The estimation of echo signal 26 is subsequently presented in two ears of user
One, and another in two ears of user is presented to contrary phase place.Filter the
The output 30 of the sef-adapting filter 32 of the output of two subtractors 34 produce masking signal estimate with
Subsequently it is presented to two ears of user.
It is given by the input X of the first mike 141(n)：
x1(n)=h1(n)*s(n)+g1(n)*q(n)
Wherein, h1N () is from the source of transmission signal s (n) to the arteries and veins of the sound transmission of the first mike 14
Punching response, and g1N () is from the masking signal source of transmission signal q (n) to the first mike 14
Sound transmission impulse response.
It is given by the input X of second microphone 162(n)：
x2(n)=h2(n)*s(n)+g2(n)*q(n)
Wherein, h2N () is from the source of transmission signal s (n) to the arteries and veins of the sound transmission of second microphone 16
Punching response, and g2N () is from the masking signal source of transmission signal q (n) to second microphone 16
Sound transmission impulse response.
Then, the output 26 of echo signal is equal to h1(n) * s (n), and masking signal estimation
Output 30 be equal to g1(n)*q(n)。
Fig. 8 schematically illustrates the Signal separator based on four mikes 14,16,14B, 16B
Unit 12, two in mike 14,16 are located in the first sonifer 10A, and its is another
Outer two（It is not shown）14B, 16B are located at the second sonifer 10B（It is not shown）In.
The distance of the increase between mike can be utilized to form the directional diagram with narrow beam,
To provide the target state estimator and being spatially separating that masking signal is estimated that improve.The biography of Beam-former
System output is used as target state estimator, and can be by a wheat from multiple mikes
The microphone audio signal of gram wind deducts target state estimator and estimates providing masking signal.
By the two of the first sonifer 10 in the corresponding prefilter 22,24 being known in the art
The microphone audio signal 18 of individual mike 22,24,20 pre-filterings are microphone audio signal
y1(n)、y2(n), and it is entered into corresponding sef-adapting filter a1(n)、a2(n)。
Second sonifer 10B（It is not shown）Two mikes 14B, 16B（It is not shown）'s
The microphone audio signal of pre-filtering is encoded to in the second sonifer 10B（It is not shown）In
Transmission, and be sent to the first sonifer 10A using wirelessly or non-wirelessly data transfer.Table
Show two mikes 14B, 16B of the second sonifer 10B（It is not shown）Microphone audio letter
Number transmission data received by the transceiver 36 of the first sonifer 10A, and in decoder 38
In be decoded as two microphone audio signal y3(n)、y4(n), and be imported into it is corresponding from
Adaptive filter a3(n)、a4(n)。
Sef-adapting filter a1(n)、a2(n)、a3(n)、a4N () is configured to filter corresponding Mike
Wind audio signal y1(n)、y2(n)、y3(n)、y4(n), and by for Adaptive beamformer
Respective filter coefficient is adapted to sound source.
The wave filter a that can be adapted to1(n)、a2(n)、a3(n)、a4N () is made it possible in sonifer system
The user of system focuses on moving sound or focuses on the sound source not moved while mobile.And,
The wave filter a that can be adapted to1(n)、a2(n)、a3(n)、a4N () can adapt in acoustic environment
Change, the appearance of such as new sound source, the disappearance of masking signal or noise source or masking signal or make an uproar
Movement of the sound source relative to the user of hearing aid device system.
Can be with the signal received at least one mike 14,16,14B, 16B
The echo signal from predeterminated target direction is modeled as plus designing under the hypothesis of the combination of noise
Adaptive beam former wave filter a1(n)、a2(n)、a3(n)、a4(n)：
yi(n)=hi(n)*s(n)+vi(n)
Wherein, hiN () is from the source of transmission signal s (n) to the pulse of the sound transmission of i-th mike
Response, and viN () is the noise signal at same mike.The masking signal can be by
Directivity masking signal or noise and such as diffusion noise or babble noise it is other kinds of
Masking signal or noise are constituted.
Filter coefficient can be adaptively determined by solving following optimization problem：
Submit to
It is preferably used lowest mean square（LMS）Method, more preferred with it is standardized it is minimum
Side（NLMS）Method is performing filter adaptation；It is also possible, however, to use other algorithms, such as
Recursive least-squares, steepest decline or other kinds of numerical optimisation algorithms.
Sef-adapting filter a is added in adder 341(n)、a2(n)、a3(n)、a4The output of (n),
And the output 26 of adder 34 constitutes the estimation of echo signal
Subtractor 28 exports the estimation of masking signal：
Once have determined that target and masking signal are estimated, then improving the side of the SRT of user
Formula is such as schematically illustrated in the figure 7 the signal is presented to user.
Fig. 9 illustrates the example of new binaural hearing aid system 10.
The new binaural hearing aid system 10 has first and second sonifer 10A, 10B, it
With the transceiver 36,36B for data communication between two sonifers 10A, 10B.
First sonifer 10A includes at least one mike, and it has two mikes 14,16, uses
Microphone audio signal is provided in the sound in response to the reception at corresponding mike 14,16
18、20.Corresponding prefilter 22 that microphone audio signal 18,20 is known in the art,
By pre-filtering it is microphone audio signal in 24, and is imported into signal separation unit 12.
Illustrate in greater detail in Fig. 8 and describe signal separation unit 12 above with reference to Fig. 8.
Second sonifer 10B also include at least one mike, its have two mike 14B,
16B, for providing Mike in response to the sound received at corresponding mike 14B, 16B
Wind audio signal 18B, 20B.Microphone audio signal 18B, 20B are known in the art
Prefilter 22B, 24B pre-filtering.Then, the pre-filtering of two mikes 22B, 24B
Microphone audio signal be encoded in codec 40B, with using wireless data transmission send out
It is sent to the first sonifer 10A.Represent the transmission of the microphone audio signal of the second sonifer 10B
Data are received by the transceiver 36 of the first sonifer 10A, and are decoded in decoder 38
Two microphone audios letter of the signal separation unit 12 to be imported into above with reference to described in Fig. 8
Number.
Signal separation unit 12 is configured to based on the pre- of first and second sonifer 10A, 10B
The microphone audio signal of filtering provides the estimation of echo signal 26 and the estimation of masking signal 30.
Compared with distance between the mike in single sonifer in independent sonifer
Relatively large distance between the mike of 10A, 10B makes it possible to configure signal separation unit
12 Beam-former, referring to Fig. 8, narrow beam directional diagram provide by the estimation of echo signal 26 with
The improvement of the estimation of masking signal 30 is spatially separating.The tradition output of Beam-former is used as
The estimation of echo signal 26, and by from multiple four mikes 14,16,14B, 16B
In a mike pre-filtering microphone audio signal deduct echo signal 26 estimation come
The estimation of masking signal 30 is provided.
Once have determined that target and masking signal are estimated, in the way of the SRT for improving user
Signal is presented to user.In first adder 42, the estimation of echo signal 26 is added to
The estimation of masking signal 30, it is at least one by frequency modification, and echo signal 26 is estimated
Meter is output with the estimation of masking signal 30 and is delayed by delayer 44, and is transfused to
To signal processor 46 for hearing loss compensation.Delayer 44 is maintained respectively by the first He
The desired relative phase of the signal of second sonifer 10A, 10B outputs.
Output transducer 48, is in the example shown receptor 48, by signal processor 46
Output be converted to acoustic output signal, the acoustic output signal is by wearing dual-earpiece sonifer system
The eardrum of the user of system 10 sends.
And, in second adder 50,180 ° of estimation and the phase shift from masking signal 30 is right
Should deduct the estimation of echo signal 26, it is at least one by frequency modification, and the second addition
The output of device 50 is encoded in codec 40, is helped with being sent to second by transceiver 36
Listen device 10B.In the second sonifer 10B, transmission and received by transceiver 36B, and
Decoded by decoder 38B, and be imported into signal processor 46B for hearing loss benefit
Repay.Output transducer 48B, is in the example shown receptor 48B, by signal processor
The output of 46B is converted to acoustic output signal, and the acoustic output signal is by wearing dual-earpiece sonifer
The eardrum of the user of system 10 sends.In this way it is possible to according to acoustic environment by user's
SRT improves up to 20dB.
The estimation of echo signal 26 and the estimation of masking signal 30 can be exchanged so that shelter letter
Numbers 20 estimation was phase-shifted 180 ° before be presented in the eardrum of user, substituted mesh
The phase shift of mark signal 26.The improvement in SRT for obtaining by this way is less than to be believed by target
The improvement that the phase shift of numbers 26 estimation is obtained.
Claims (26)
1. a kind of sonifer (10), including：
At least one mike (14,16), in response at least one mike
(14,16) place receive sound and provide at least one microphone audio signal (18,20),
Signal separation unit (12), is configured to believe based at least one microphone audio
Number (18,20) providing the estimation of echo signal (26) and the estimation of masking signal (30),
Frequency modification unit (52), is configured to change the echo signal (26) and described
The frequency content of at least one of the estimation of masking signal (30) so that by the frequency
During the process of rate modification unit (52), estimated mesh is substantially exported in different bands
Mark signal (26) and estimated masking signal (30),
Receptor (48), for will by the frequency modification unit (52) change and export
The estimation of the echo signal (26) and the Combination conversion of the estimation of the masking signal (30)
For the acoustic signal to send in the eardrum of the user of the sonifer (10).
2. sonifer (10) according to claim 1, wherein, the frequency modification list
First (52) are configured to：
By in the estimation of the echo signal (26) and the estimation of the masking signal (30)
One frequency displacement is to the estimation for being wherein substantially absent from the echo signal (26) and described shelters
In another frequency field in the estimation of signal (30).
3. sonifer (10) according to claim 1, wherein, the frequency modification list
First (52) are configured to：
The estimation of the echo signal (26) and estimating for the masking signal (30) are determined respectively
The pitch and overtone of meter, and
In the estimation of echo signal described in frequency displacement (26) and the estimation of the masking signal (30)
One so that the pitch and overtone of the signal of institute's frequency displacement reside in the corresponding sound of another signal
Between high and overtone.
4. sonifer (10) according to claim 1, wherein, the frequency modification list
First (52) include：
Wave filter group, and wherein, the frequency modification unit (52) be configured to, with by
Echo signal (26) described in the band division filter of the estimation for distributing to the echo signal (26)
Estimate, and
Using the estimation for being assigned to the masking signal (30) other band division filters described in cover
Cover the estimation of signal (30).
5. sonifer (10) according to claim 4, wherein, the wave filter group quilt
Be tuned to be intended to the auditory filter of user.
6. sonifer (10) described in any one in claim 1-5, further
Including：
Phase-shift circuit (54), is configured to the estimation of the echo signal (26) and described
One in the estimation of masking signal (30) relative to the echo signal (26) estimation and
Another phase shift in the estimation of the masking signal (30).
7. sonifer (10) described in any one in claim 1-5, wherein,
The signal separation unit (12) is configured to be carried based on the spectral characteristic of the audio signal
For the estimation.
8. sonifer (10) described in any one in claim 1-5, wherein,
The signal separation unit (12) is configured to be carried based on the statistical property of the audio signal
For the estimation.
9. sonifer (10) described in any one in claim 1-5, wherein,
The signal separation unit (12) is including Beam-former.
10. sonifer (10) according to claim 9, wherein, the Wave beam forming
Device includes sef-adapting filter, and the sef-adapting filter is configured to filter corresponding mike
Audio signal, and be the output for minimizing the wave filter by corresponding filter coefficient adaptation
The sum of signal.
A kind of 11. binaural hearing aid systems (10), including：
First sonifer (10A) according to claim 1, and
Second sonifer (10B), including at least one mike (14B, 16B), are used for
There is provided corresponding in response to the sound received at least one mike (14B, the 16B) place
At least one microphone audio signal (18B, 20B), and wherein
Transceiver (36B) in second sonifer (10B) is connected to for institute
State the first sonifer (10A) send represent at least one microphone audio signal (18B,
Signal 20B), and wherein
Transceiver (36) in first sonifer (10A) is connected to for receiving table
Show at least one microphone audio signal (14B, 16B) of second sonifer (10B)
Signal, and wherein
The signal separation unit (12) is configured to based on first and second sonifer
At least one microphone audio signal (18,20,18B, 20B) of (10A, 10B)
To provide the estimation of the echo signal (26) and the estimation of the masking signal (30).
12. binaural hearing aid systems (10) according to claim 11, wherein, it is described
Frequency modification unit (52) is configured to：
By in the estimation of the echo signal (26) and the estimation of the masking signal (30)
One frequency displacement is to the estimation for being wherein substantially absent from the echo signal (26) and described shelters
In another frequency field in the estimation of signal (30).
13. binaural hearing aid systems (10) according to claim 11, wherein, it is described
Frequency modification unit (52) is configured to：
The estimation of the echo signal (26) and estimating for the masking signal (30) are determined respectively
The pitch and overtone of meter, and
In the estimation of echo signal described in frequency displacement (26) and the estimation of the masking signal (30)
One so that the pitch and overtone of the signal of institute's frequency displacement reside in the corresponding sound of another signal
Between high and overtone.
14. binaural hearing aid systems (10) according to claim 11, wherein, it is described
Frequency modification unit (52) includes：
Wave filter group, and wherein, the frequency modification unit (52) be configured to, with by
Echo signal (26) described in the band division filter of the estimation for distributing to the echo signal (26)
Estimate, and
Using the estimation for being assigned to the masking signal (30) other band division filters described in cover
Cover the estimation of signal (30).
15. binaural hearing aid systems (10) according to claim 14, wherein, it is described
Wave filter group is tuned to the auditory filter for being intended to user.
Binaural hearing aid system described in 16. any one in claim 11-15
(10), further include：
Phase-shift circuit (54), is configured to the estimation of the echo signal (26) and described
One in the estimation of masking signal (30) relative to the echo signal (26) estimation and
Another phase shift in the estimation of the masking signal (30).
Binaural hearing aid system described in 17. any one in claim 11-15
(10), wherein, the signal separation unit (12) is configured to based on the audio signal
Spectral characteristic providing the estimation.
Binaural hearing aid system described in 18. any one in claim 11-15
(10), wherein, the signal separation unit (12) is configured to based on the audio signal
Statistical property providing the estimation.
Binaural hearing aid system described in 19. any one in claim 11-15
(10), wherein, the signal separation unit (12) is including Beam-former.
20. binaural hearing aid systems (10) according to claim 19, wherein, it is described
Beam-former is configured to based on the Mike of first and second sonifer (10A, 10B)
Wind audio signal (18,20,18B, 20B) is providing the estimation.
21. binaural hearing aid systems (10) according to claim 19, wherein, it is described
Beam-former includes sef-adapting filter, and the sef-adapting filter is configured to filter corresponding
Microphone audio signal, and by corresponding filter coefficient adaptation to minimize the filtering
The sum of the output signal of device.
The method of signal enhancing of 22. one kind in sonifer (10), methods described includes step
Suddenly：
There is provided in response to sound at least one microphone audio signal (18,20), and
Based at least one audio signal (18,20) providing echo signal (26)
Estimate the estimation with masking signal (30),
The estimation of echo signal described in frequency modification (26) and the masking signal in the following manner
(30) at least one of estimation：After the modification, the estimation of the echo signal (26)
Reside substantially in different frequency bands with the estimation of the masking signal (30), and
It is sent in in the eardrum of the user of the sonifer (10) amended described
The estimation of echo signal (26) and the combination of the estimation of the masking signal (30).
The method of 23. signal enhancings according to claim 22, including step：
In response to the sound received in ears at the ears of user provide at least one mike
Audio signal (18,20,18B, 20B), and
Carried based on the microphone audio signal (18,20,18B, 20B) at ears
For the estimation of in the echo signal (26) and the masking signal (30).
The method of the signal enhancing described in 24. any one in claim 22 or 23,
Including step：Based on the microphone audio signal come Wave beam forming.
The method of 25. signal enhancings according to claim 23, including step：By inciting somebody to action
Corresponding filter coefficient adaptation is to minimize the output signal of adaptive-filtering and carry out self adaptation
Filter the microphone audio signal.
The method of the signal enhancing described in 26. any one in claim 22 or 23,
Further include step：
By in the estimation of the echo signal (26) and the estimation of the masking signal (30)
One estimation and the estimation of the masking signal (30) relative to the echo signal (26)
In another phase shift.
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| Application Number | Priority Date | Filing Date | Title |
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| EP11196247.8A EP2611215B1 (en) | 2011-12-30 | 2011-12-30 | A hearing aid with signal enhancement |
| EP11196247.8 | 2011-12-30 | ||
| EP12175247.1 | 2012-07-06 | ||
| EP20120175247 EP2683179B1 (en) | 2012-07-06 | 2012-07-06 | Hearing aid with frequency unmasking |
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| DKPA201270402 | 2012-07-06 |
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| EP3160577B1 (en) * | 2014-06-25 | 2019-02-20 | Med-El Elektromedizinische Geraete GmbH | Stimulus signal for simultaneous measurement of auditory steady state responses and psychophysical pitch discrimination |
| DK179577B1 (en) * | 2016-10-10 | 2019-02-20 | Widex A/S | Binaural hearing aid system and a method of operating a binaural hearing aid system |
| CN110675889A (en) * | 2018-07-03 | 2020-01-10 | 阿里巴巴集团控股有限公司 | Audio signal processing method, client and electronic equipment |
| CN110718238B (en) * | 2018-07-12 | 2023-08-18 | 阿里巴巴集团控股有限公司 | Crosstalk data detection method, client and electronic equipment |
| CN111405419B (en) * | 2020-03-26 | 2022-02-15 | 海信视像科技股份有限公司 | Audio signal processing method, device and readable storage medium |
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| CN1640190A (en) * | 2001-08-08 | 2005-07-13 | Gn瑞声达公司 | Dynamic range compression using digital frequency warping |
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| CN101208991A (en) * | 2005-06-27 | 2008-06-25 | 唯听助听器公司 | Hearing aid with enhanced high-frequency rendition function and method for processing audio signal |
| EP2360943A1 (en) * | 2009-12-29 | 2011-08-24 | GN Resound A/S | Beamforming in hearing aids |
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| DE102008046966B3 (en) * | 2008-09-12 | 2010-05-06 | Siemens Medical Instruments Pte. Ltd. | Hearing aid and operation of a hearing aid with frequency transposition |
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| CN1640190A (en) * | 2001-08-08 | 2005-07-13 | Gn瑞声达公司 | Dynamic range compression using digital frequency warping |
| CN1813491A (en) * | 2003-06-24 | 2006-08-02 | Gn瑞声达A/S | A binaural hearing aid system with coordinated sound processing |
| CN101208991A (en) * | 2005-06-27 | 2008-06-25 | 唯听助听器公司 | Hearing aid with enhanced high-frequency rendition function and method for processing audio signal |
| EP2360943A1 (en) * | 2009-12-29 | 2011-08-24 | GN Resound A/S | Beamforming in hearing aids |
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