EP3913618A1 - Procédé de fonctionnement d'un appareil auditif et appareil auditif - Google Patents

Procédé de fonctionnement d'un appareil auditif et appareil auditif Download PDF

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Publication number
EP3913618A1
EP3913618A1 EP21167332.2A EP21167332A EP3913618A1 EP 3913618 A1 EP3913618 A1 EP 3913618A1 EP 21167332 A EP21167332 A EP 21167332A EP 3913618 A1 EP3913618 A1 EP 3913618A1
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EP
European Patent Office
Prior art keywords
sound
hearing aid
signal
output
directional microphone
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.)
Withdrawn
Application number
EP21167332.2A
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German (de)
English (en)
Inventor
Sebastian BEST
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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Filing date
Publication date
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Publication of EP3913618A1 publication Critical patent/EP3913618A1/fr
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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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
    • 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • 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
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/111—Directivity control or beam pattern
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/023—Completely in the canal [CIC] hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/41—Detection or adaptation of hearing aid parameters or programs to listening situation, e.g. pub, forest
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/01—Hearing devices using active noise cancellation

Definitions

  • the method relates to a method for operating a hearing aid and a hearing aid.
  • the hearing aid has a directional microphone, a noise suppression unit and a receiver for outputting an output sound.
  • the hearing aid is preferably a hearing aid.
  • Ambient sound is usually recorded by means of an electromechanical sound transducer.
  • the recorded electrical signals are processed by means of an amplifier circuit and introduced into the ear canal of the person by means of a further electromechanical transducer in the form of a receiver.
  • the recorded sound signals are also processed, for which a signal processor of the amplifier circuit is usually used. In this case, the gain is matched to any hearing loss of the hearing aid wearer.
  • the ambient sound also includes sound from an interference source, that is to say an unwanted source, this is also recorded and, due to the amplification, is introduced into the person's auditory canal to a greater extent.
  • a directional microphone is usually used to avoid this. This is set to a desired sound source so that only the sound emitted by this is recorded by means of the electromechanical sound transducer. Thus, only this component of the ambient sound is emitted into the auditory canal in an amplified manner by means of the amplifier circuit.
  • the sound emitted by the source of interference also penetrates directly into the ear canal of the person so that it is perceived by the person, albeit not amplified. So a distinction is possible for the person, the gain factor of the amplifier circuit is therefore also increased, which can lead to a loss of comfort and fatigue of the person.
  • Headphones with active noise suppression are also known.
  • the headphones usually have a microphone, by means of which the ambient sound is recorded and passed to a background noise suppression unit, by means of which a counter-sound signal is generated. This is conducted to a listener of the headphones so that an output sound is emitted into the ear canal. This is superimposed on the ambient sound penetrating the ear canal, so that a destructive acoustic interference occurs. As a result, the ambient sound cannot be perceived by the person or is only perceptible to a reduced extent. Furthermore, additional sound, usually in the form of music, is emitted into the ear canal with the listener. Due to the noise suppression, it is possible to output the additional sound at a reduced volume, although this can still be perceived better by the person.
  • the sound to be perceived by the person namely the additional sound
  • the headphones themselves it is necessary to completely eliminate the ambient sound by means of the destructive acoustic interference in the auditory canal.
  • the person can essentially not perceive processes in their environment, at least on the basis of the respective ambient sound.
  • the invention is based on the object of specifying a particularly suitable method for operating a hearing aid and a particularly suitable method for operating a hearing aid system as well as a particularly suitable hearing aid, with in particular comfort and / or speech intelligibility being increased.
  • the method is used to operate a hearing aid.
  • the hearing aid is a headphone or comprises a headphone.
  • the hearing aid is particularly preferred but a hearing aid.
  • the hearing aid device is used to support a person suffering from a hearing impairment.
  • the hearing aid device is a medical device, by means of which, for example, a partial hearing loss is compensated.
  • the hearing aid is, for example, a "receiver-in-the-canal” hearing aid (RIC; Ex-Hörer- hearing aid), an in-the-ear hearing aid, such as an "in-the-ear” hearing aid, an "in-the -canal "hearing aid (ITC) or a” complete-in-canal "hearing aid (CIC), hearing glasses, a pocket hearing aid, a bone conduction hearing aid or an implant.
  • the hearing aid device is particularly preferably a behind-the-ear hearing aid device that is worn behind an auricle.
  • the hearing aid is intended and set up to be worn on the human body.
  • the hearing aid preferably comprises a holding device, by means of which attachment to the human body is possible.
  • the hearing aid is provided and set up, for example, to be arranged behind the ear or within an auditory canal.
  • the hearing aid is wireless and is provided and set up to be at least partially inserted into an auditory canal.
  • the hearing aid particularly preferably comprises an energy store, by means of which an energy supply is provided.
  • the hearing aid has a directional microphone.
  • the directional microphone is used to record sound from a preferred direction.
  • the (acoustic) sound is converted into an electrical signal by means of the directional microphone, which is referred to below as a sound signal.
  • the directional microphone only or at least amplifies the sound from the preferred direction. If, on the other hand, additional sound strikes the directional microphone, for example from the opposite direction, this additional sound is not detected or only to a reduced extent, so that it represents no or only a comparatively small component of the sound signal.
  • the directional microphone that is to say the preferred detection of the sound from the preferred direction
  • it expediently has several individual microphones, each of which is designed, for example, as an omnidirectional microphone.
  • the directional effect is realized here by means of a corresponding evaluation of the electrical signals generated by means of the microphones.
  • the hearing aid has a noise suppression unit which is designed in particular to be active (ANC; “active noise canceling”).
  • the noise suppression unit is suitable, in particular provided and set up, to generate a counter-sound signal, in particular for the sound signal.
  • the hearing aid also comprises a receiver which is preferably designed in the manner of a loudspeaker.
  • the handset is an electromechanical transducer.
  • the receiver is used to output an output sound, i.e. the output of sound waves, which is acoustically.
  • the receiver is suitably arranged in such a way that the output sound is emitted into an auditory canal of a wearer of the hearing aid, that is to say of the user, when the hearing aid is worn in the intended state.
  • the method provides that sound from the preferred direction is recorded by means of the directional microphone.
  • the acoustic sound waves of the sound are thus converted into the electrical sound signal.
  • the preferred direction is, for example, a single direction, and only the sound that hits the directional microphone around a cone around the preferred direction is recorded so that the sound signal only has these components of the ambient sound.
  • only that part of the ambient sound is recorded by means of the directional microphone and converted into the sound signal that hits the directional microphone from a room area, the room area being a cone, the axis of which goes through the directional microphone and is parallel to the preferred direction.
  • the solid angle is smaller than 90 °, 45 °, 30 °, 20 ° or 10 °.
  • the area of the room from which the sound originates has an anti-cardioid shape.
  • the sound signal generated by the directional microphone is sent to the noise suppression unit.
  • the directional microphone and the background noise suppression unit are connected to one another for signaling purposes, for example by means of a cable or a conductor track.
  • an anti-noise signal is generated, which is thus also an electrical signal.
  • the counter-sound signal is passed to the listener, for example directly or via other components.
  • the listener is thus at least partially acted upon by means of the counter-sound signal or at least a signal that is based on the counter-sound signal.
  • the counter-sound signal is thus output as output sound.
  • the counter-sound signal is converted into sound, namely the output sound.
  • the output sound was used for destructive acoustic interference with the sound. In other words, when the output sound is superimposed on the sound, at least partially destructive acoustic interference occurs.
  • the output sound is suitable for this, in particular provided and set up.
  • the destructive acoustic interference expediently takes place on the ear or in the ear canal / auditory canal of the user.
  • the hearing aid is expediently designed accordingly for this purpose.
  • both the sound and the output sound reach the hearing aid in the intended state of the hearing aid, that is, when it is worn by the person, in the ear canal, and the output sound and the sound are superimposed.
  • the destructive acoustic interference occurs here, so that the person wearing the hearing aid, that is to say the user, cannot perceive the sound or at least only perceive it to a greatly reduced extent.
  • the counter-sound signal is created in such a way that the resulting output sound is generated.
  • the counter-sound signal is expediently 180 ° out of phase with the sound signal.
  • Additional sound that is, sound that does not strike the directional microphone from the preferred direction and that strikes the directional microphone, for example, from the direction opposite to the preferred direction, is not attenuated or only at a comparatively low level when it is superimposed with the output sound. In this case, there is preferably essentially no change in the further sound.
  • the person does not perceive the sound hitting the directional microphone and thus the hearing aid from the preferred direction, or only perceives it to a comparatively small extent.
  • further components of the ambient sound that is to say the sound that does not strike the directional microphone from the preferred direction, are preferably not attenuated, so that the person can perceive it undiminished.
  • one or more specific sources of interference which in particular emit or emit sound, are specifically masked out, whereas the rest of the environment can still be perceived by the user. It is thus also possible to perceive comparatively quiet noises, which increases comfort and speech intelligibility and therefore also security.
  • comparatively quiet noises which increases comfort and speech intelligibility and therefore also security.
  • the directional microphone records sound from several preferred directions and sends it to the noise suppression unit. It is thus possible to mask out several sources of interference.
  • the destructive acoustic interference takes place over a comparatively broad frequency band, expediently over all frequencies that can be perceived by a human being, that is to say in particular from 20 Hz to 20,000 kHz.
  • the destructive acoustic interference takes place in a frequency-selective manner.
  • the counter-sound signal is expediently created accordingly for this purpose.
  • the output sound and thus also the counter-sound signal have an upper (frequency) limit, so that only destructive interference occurs with the sound whose frequency is lower than the upper frequency limit.
  • a lower frequency limit is also present, so that the counter-sound signal has a lower and an upper (frequency) limit. It is thus possible to suppress certain sources of interference in a targeted manner, whereas sources of additional sound that are also in the preferred direction can still be perceived by the user. Thus, comfort is further increased.
  • the preferred direction is set to be rigid.
  • the possible microphones of the directional microphone are, for example, permanently electrically connected to one another.
  • the preferred direction is particularly preferably changed as a function of the sound itself. In particular, an adaptive adjustment of the preferred direction takes place here.
  • the preferred direction is suitably set in such a way that a certain component of the ambient sound is identified as sound. This sound has, for example, certain properties, such as a certain one Frequency or other properties. For example, the sound is identified manually or automatically in the ambient sound.
  • a constant hum or the like is first identified in the ambient sound, which is caused by the source of interference, for example a refrigerator or a jackhammer.
  • the direction from which this sound hits the directional microphone is then identified, and this direction is used as the preferred direction. If the position of the source of interference changes with respect to the directional microphone, in particular the preferred direction is adapted. The preferred direction is thus set to the current source of interference, and this is thus at least partially masked out.
  • the hearing aid only serves to block out the sound for the person.
  • only the counter-sound signal is output by means of the hearing device.
  • a further sound signal is output by means of the receiver at the same time as the counter-sound signal.
  • the output sound has several components.
  • the further sound signal is, for example, a piece of music or a soundtrack from a film.
  • the further sound signal is also generated by means of the hearing aid itself.
  • another sound is recorded by means of the hearing aid and passed as an audio signal to a corresponding circuit.
  • the additional sound signal is derived from this by means of this.
  • amplification takes place by means of the circuit, the amplification taking place in a direction-selective manner, for example.
  • the further sound is preferably detected from a further preferred direction, which in particular has an angle to the preferred direction that is greater than 30 ° or 45 °.
  • the hearing aid expediently comprises a signal processor, which suitably at least partially takes over the function of the circuit.
  • the signal processor is, for example, a digital signal processor (DSP) or implemented using analog components.
  • DSP digital signal processor
  • the signal processor is used in particular to adapt the audio signal, which is generated in particular with the directional microphone, for example part of it, or a further microphone.
  • an A / D converter is expediently arranged between these, provided the signal processor is designed as a digital signal processor.
  • the signal processor is set in particular as a function of a set of parameters. Using the A gain in different frequency ranges is specified in the parameter set. For example, the gain factor assigned to the individual frequency bands differs in the case of different parameter sets.
  • the hearing aid particularly preferably additionally comprises an amplifier, or the amplifier is at least partially formed by means of the signal processor. For example, in terms of signal technology, the amplifier is connected upstream or downstream of the signal processor.
  • the user can perceive a sound source producing the additional sound to a greater extent, so that an at least partial hearing loss can be compensated for. At least, however, an intelligibility of the further sound is improved for the user.
  • the hearing aid is a headphone or comprises a headphone.
  • the hearing aid is designed, for example, as a so-called headset.
  • the hearing aid is particularly preferably a hearing aid.
  • the hearing aid device is used to support a person suffering from a hearing impairment.
  • the hearing aid device is a medical device, by means of which, for example, a partial hearing loss is compensated.
  • the hearing aid is, for example, a "receiver-in-the-canal” hearing aid (RIC; Ex-listener hearing aid), an in-the-ear hearing aid, such as an "in-the-ear” hearing aid, an "in-the -canal "hearing aid (ITC) or a” complete-in-canal "hearing aid (CIC), hearing glasses, a pocket hearing aid, a bone conduction hearing aid or an implant.
  • the hearing aid device is particularly preferably a behind-the-ear hearing aid device that is worn behind an auricle.
  • the hearing aid also has a directional microphone, a noise suppression unit and a receiver.
  • the receiver can be arranged outside or at least partially within an auditory canal of a user and is arranged there when the hearing aid is worn as intended.
  • the hearing aid is operated according to a method in which the directional microphone detects sound from a preferred direction and sends it to the noise suppression unit is directed.
  • An anti-noise signal is generated by means of the background noise suppression unit and sent to the listener.
  • the counter-sound signal is output as output sound by means of the earpiece, the counter-sound signal being generated in such a way that when the output sound is superimposed on the sound, at least partially destructive acoustic interference occurs.
  • the hearing aid preferably has a control unit by means of which the method is at least partially carried out. In other words, the control unit is suitable, in particular provided and set up, to carry out the method.
  • a hearing aid with a directional microphone is used to generate an output sound for at least partially destructive acoustic interference with a sound from a preferred direction when superimposed.
  • the output sound is based on a counter-sound signal that is based on the sound recorded from the preferred direction by means of the directional microphone.
  • a hearing aid 2 is shown in the form of a hearing aid which is provided and set up to be worn behind an ear of a user (user, hearing aid wearer, wearer). In other words, it is a behind-the-ear hearing aid device ("behind-the-ear” hearing aid device).
  • the hearing aid 2 comprises a housing 4 which is made of a plastic. Inside the case 4 is a directional microphone 6 with two electromechanical sound transducers in the form of an omnidirectional microphone 8 each. By changing a time offset between the acoustic signals detected by means of the omnidirectional microphones 8, it is possible to change a directional characteristic of the directional microphone 6.
  • the two microphones 8 are signal-technically coupled to a signal processing unit 10, which comprises an amplifier circuit (not shown in detail) and a signal processor 12.
  • the signal processing unit 10 is also formed by means of circuit elements, such as, for example, electrical and / or electronic components.
  • the signal processor 12 is a digital signal processor (DSP) and is signal-connected to the microphones 8 via an A / D converter (not shown in detail).
  • DSP digital signal processor
  • a receiver 14 is signal-coupled to the signal processing unit 10. During operation, the receiver 14 converts an (electrical) signal provided by the signal processing unit 10 into an output sound 16, that is to say into sound waves. These are introduced into a sound tube 18, one end of which is attached to the housing 4. The other end of the sound tube 18 is enclosed by means of a dome 20 which, in the intended state, is arranged in an auditory canal of the user, not shown here. Here, the dome 20 has several openings so that it is more comfortable to wear.
  • the signal processing unit 10, the directional microphone 6 and the receiver 14 are supplied with current by means of a battery 22.
  • FIG. 2 a method 24 for operating the hearing aid 2 is shown, the signal path of which is shown in FIG Figure 3 is shown.
  • a first work step 26 an ambient sound 27 is recorded by means of the microphones 8.
  • the ambient sound 27 here has sound 28 which strikes the directional microphone 6 from a preferred direction 30.
  • the ambient sound 27 has further sound 32 which strikes the directional microphone 6 from a further preferred direction 34.
  • the sound 28 is emitted by an interference source and has a specific frequency spectrum, namely essentially only a single frequency which is 50 Hz.
  • the further sound 32 is emitted by a further sound source, namely a further person.
  • the sound 28 and the further sound 32 are recorded by means of the microphones 8 of the directional microphone 6 and passed to the signal processing unit 10.
  • the signal processing unit 10 forms part of the directional microphone 6, and by means of a corresponding time offset, the component corresponding to the sound 28, namely a sound signal 36 and a component corresponding to the further sound 32, is in the detected signals that are detected by the microphones 8 Component, namely an audio signal 38, identified.
  • the preferred direction 30, that is to say the direction from which the sound 28 is recorded by means of the directional microphone 6 for generating the sound signal 36, is changed as a function of the sound 28.
  • the preferred direction 30 is changed in the direction from which the sound 28 mainly hits the directional microphone 6.
  • the maximum in the directional distribution for the 50 Hz signal is determined and the preferred direction 30 is placed in this direction.
  • the further preferred direction 34 is set in such a way that it points to the further sound source. This is done, for example, manually or by means of a suitable algorithm.
  • the further sound signal 38 is passed to the signal processor 12.
  • the audio signal 38 is processed by the signal processor 12. In this case, certain frequencies are amplified and others are attenuated. Compression is also set. The audio signal 38 processed in this way is fed as a further sound signal 45 to an amplifier 46 of the signal processing unit 10.
  • a fifth work step 48 is carried out.
  • the sound signal 36 is fed to a background noise suppression unit 50 of the signal processing unit 10.
  • an anti-noise signal 54 is created by means of the background noise suppression unit 50, which signal is also passed to the amplifier 46.
  • the amplifier 46 in a seventh work step 56, the further sound signal 45 and the counter-sound signal 54 are amplified and sent to the receiver 14 in combination.
  • the amplified further sound signal 45 and the counter-sound signal 54 emitted as the output sound 16 through the sound tube 18 into an auditory canal 60 of the user.
  • the surrounding sound 27, that is, both the sound 28 and the further sound 32 also enter the auditory canal 60 essentially unhindered.
  • the sound 28 and the further sound 32 are also superimposed in the auditory canal 60 the output sound 16.
  • the sound 28 cannot be perceived by the user or is only perceptible to a comparatively reduced extent. It is therefore not necessary to select the amplification of the audio signal 38 to be comparatively high in the fourth work step 44, although the user can still reliably perceive the further sound 32 either directly or using the components contained by means of the output sound 16.
  • the counter-sound signal 54 or the component of the output sound 16 based thereon only has a frequency of 50 Hz, so that the destructive acoustic interference occurs in a frequency-selective manner. It is thus possible for the user to perceive other sound sources besides the interference source from the preferred direction 30.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Neurosurgery (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Headphones And Earphones (AREA)
EP21167332.2A 2020-05-20 2021-04-08 Procédé de fonctionnement d'un appareil auditif et appareil auditif Withdrawn EP3913618A1 (fr)

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CN114422933B (zh) * 2021-12-31 2024-04-26 歌尔科技有限公司 一种电子设备及其的声场处理方法以及声场处理设备

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EP1581026B1 (fr) * 2004-03-17 2015-11-11 Nuance Communications, Inc. Méthode pour la détection et la réduction de bruit d'une matrice de microphones
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EP1931172B1 (fr) 2006-12-01 2009-07-01 Siemens Audiologische Technik GmbH Prothèse auditive avec suppression du bruit et procédé correspondant
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US20210368280A1 (en) 2021-11-25
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