CN111417062A - Prescription for testing and matching hearing aid - Google Patents
Prescription for testing and matching hearing aid Download PDFInfo
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- CN111417062A CN111417062A CN202010342790.7A CN202010342790A CN111417062A CN 111417062 A CN111417062 A CN 111417062A CN 202010342790 A CN202010342790 A CN 202010342790A CN 111417062 A CN111417062 A CN 111417062A
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- prescription
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- setting interface
- hearing aid
- speech
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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
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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
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
- H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
Abstract
The invention discloses a prescription for testing and matching a hearing aid, which comprises: a prescription input module, a prescription acoustic processing module, and a prescription output processing module, in which the concept of effective audibility is used to generate a gain target to eliminate unnecessary gains that may reduce sound quality. In order to obtain the best hearing aid fitting prescription, the target values of large sound frequency response, medium sound frequency response and small sound frequency response are calculated by a core algorithm generator by using not only a psychoacoustic model for speech intelligibility and loudness but also a Chinese acoustic model for best speech quality.
Description
Technical Field
The invention relates to the technical field of hearing aids, in particular to an optimal fitting prescription worn by a hearing aid.
Background
The fitting of hearing aids is an important part of the rehabilitation of hearing-impaired persons, and only the selection of an appropriate hearing aid for them to achieve the best hearing compensation effect can help the recovery of auditory speech.
To maximize the acceptance of extraneous amplification, a balance must be struck between sound quality and sound audibility. To do this, we must consider the individual listening preferences and preferred loudness levels of each patient, some patients prefer hearing, while others prefer sound quality. These preferences are based on a variety of factors, including the patient's hearing loss, loudness growth needs, typical hearing conditions and lifestyle.
International hearing aid fitting prescriptions have NA L-N L2, DS L0 v5.0, etc., DS L1 v 5.0. despite several modifications, the overall goal of DS L has been "loudness normalization" for many years-in other words, its emphasis has been on audibility, the australian national acoustic laboratory (NA L), the more recent modification has been NA L-N L2. NA L-N L2 has utilized a speech intelligibility model that takes into account some personal characteristics, but the main concern of NA L-N L2 is speech intelligibility (emphasis) rather than sound quality, in order to ensure the best balance between audibility and listening comfort, it is proposed that the hearing aid fitting prescription is specifically directed to the compensation of national physiological structure, living habits and speech characteristics of a person, such as the ear canal of a chinese is small and generally more important than hearing aids worn in chinese, having a single-character, i.e. one has one and only one and one word space, multiple-tone characteristics, etc.
Disclosure of Invention
The technical problem mainly solved by the invention is to provide a hearing aid fitting prescription, which can calculate a target prescription of required hearing compensation by inputting information such as hearing loss data, speech test data, real ear test data, appearance model, size and the like of a patient and then automatically configure parameters of the hearing aid.
In order to solve the problems, the invention adopts the technical scheme that: providing a prescription input module, a prescription acoustic processing module and a prescription output module.
The fitting prescription input module is an input interface used for inputting hearing loss data, speech test data, real ear test data, acoustic parameters, compression parameters and hearing aid types of a patient;
the audition prescription acoustic processing module uses a psychoacoustic model and a Chinese acoustic model to achieve effective audibility, the effective audibility predicts audibility that contributes to speech intelligibility of an individual based on hearing loss values, studies have shown that audibility of a person with normal hearing is about 30 dB, meaning that speech intelligibility of a normally hearing audience increases as speech level increases from 0dB S L (the perceptual level). The speech intelligibility typically reaches full 100% when reaching about 30 dB S L;
for example, for a 60dB H L hearing loss, the effective audibility is only 20 dB (which varies with frequency), and for this hearing loss, the maximum speech intelligibility will reach about 20 dB S L. even in some cases, this maximum speech intelligibility may only be about 50%, but further increases in loudness will exceed the effective audibility, and therefore will not further increase speech intelligibility.
The fitting prescription output module is used for generating a function from the target curve and outputting performance configuration which can be used for automatically adjusting various parameters of the hearing aid, so that the hearing aid compensation effect which accords with each patient is automatically adjusted.
In a preferred embodiment of the present invention, the hearing loss data of the patient comprises computer-side, mobile-side, cloud-side input air conduction, bone conduction, uncomfortable domain, masking value, and the speech test data comprises but is not limited to speech discomfort threshold, speech resolution, ambient noise speech resolution, speech acceptance threshold (SRT), speech perception threshold (SDT), optimal loudness level, speech perception domain; the real ear test data includes, but is not limited to, real ear not-aided responses (REUR),
Real ear coupling cavity difference (RECD), real ear reading difference (REDD); the acoustic parameters include but are not limited to hearing aid shape, microphone type, sound tube shape, earplug appearance, earplug size, vent size, power level;
in a preferred embodiment of the present invention, the psychoacoustic model includes a Speech Intelligibility Index (SII) and a hearing impaired person comfort model, the SII considers speech distribution and estimates speech intelligibility of frequencies according to a specific hearing loss, and on the other hand, the hearing impaired person comfort model estimates loudness, intelligibility and perception of overall tone according to hearing loss, and by combining the results of the two models, the sound quality psychoacoustic model can ensure that a model of excellent sound quality is provided without impairing speech intelligibility; the Chinese acoustic models include, but are not limited to, a distribution energy map in a speech banana picture, Mandarin soft-sounding acoustic characteristics, Lin's six tones, Mandarin vowel acoustic characteristics, Mandarin double-syllable vowel characteristics, and other syllable, phoneme and phonological relationships; for example, the low-pitched syllable sounds light because the low-pitched syllable is a comprehensive effect of the total weakening of four elements of pitch, duration, intensity and tone color rather than a single result of the weak intensity, and for example, english is different from chinese in the pronunciation method of vowels, english has a tighter arrangement of unit tones, chinese is looser, and formants are different, so that the obtained acoustic model also needs to construct different target gains according to different frequency points.
In a preferred embodiment of the present invention, the target gains for the prescription of the hearing aid include 50 curve target gains, 55 curve target gains, 60 curve target gains, 65 curve target gains, 70 curve target gains, 75 curve target gains, 80 curve target gains, 85 curve target gains, and 90 curve target gains, and the frequency of the curves is from 125Hz to 8000 Hz.
In a preferred embodiment of the present invention, the fitting prescription output module includes, but is not limited to, a channel gain setting, a channel inflection point setting, a channel compression setting, a channel expansion ratio setting, a channel fast and slow start time setting, a channel fast and slow release time setting, a channel expansion fast and slow start time setting, a channel expansion fast and slow release time setting, a channel maximum output setting, a channel division point setting, an EQ setting, a noise reduction level setting, an acoustic feedback setting, a scene setting, a directivity setting, a wind noise setting, an instantaneous noise setting, a bluetooth audio setting, a tinnitus device setting, a frequency shift setting, and the like of the hearing aid.
The invention has the beneficial effects that: according to the hearing aid fitting prescription, the target gain curve obtained through analysis is considered through the combination of the psychoacoustic model and the Chinese acoustic model, the effective audibility, speech definition and sound quality can be realized, and therefore the hearing compensation effect of the person with hearing impairment is improved to the maximum extent.
Drawings
Fig. 1 is a schematic diagram of a framework for a preferred implementation of a hearing aid prescription of the present invention;
FIG. 2 is a block diagram of a configuration input module according to the present invention;
FIG. 3 is a block diagram of a prescription acoustic processing module of the present invention;
fig. 4 is a schematic diagram of a framework of the frequency response curve of the hearing aid according to the invention;
FIG. 5 is a block diagram of a psychoacoustic model in accordance with the present invention;
FIG. 6 is a block diagram of a Chinese acoustic model in accordance with the present invention;
FIG. 7 is a block diagram of a parametric verification model in accordance with the present invention;
FIG. 8 is a block diagram of a target gain curve in the present invention;
FIG. 9 is a block diagram of a prescription dispensing module of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.
As shown in fig. 1, an embodiment of the present invention includes:
a prescription checking and matching system for a hearing aid comprises a prescription checking and matching input module, a prescription checking and matching acoustic module and a prescription checking and matching output module, and parameters are transmitted to the hearing aid through a computer to perform optimal configuration burning work, the transmission process can be transmitted through a wired programmer or a wireless programmer, and the transmission comprises a Bluetooth general protocol, a B L E protocol, a HI-PRO protocol and a USB protocol according to a transmission protocol.
As shown in fig. 2, the embodiment of the present invention includes:
the prescription input module comprises: audiogram data, real ear test data, speech test data, compression parameters, acoustic parameters, hearing aid type, which are basic data for generating a hearing aid fitting prescription; the audiogram data includes: values of 125Hz, 250Hz, 500Hz, 750Hz, 1000Hz, 1500Hz, 2000Hz, 3000Hz, 4000Hz, 6000Hz, 8000 Hz; the real ear test comprises the following steps: values of 1/3 octaves at 125Hz-8000 Hz; the compression parameters include: and selecting a compression channel.
As shown in fig. 3, an embodiment of the present invention includes:
the prescription acoustic processing module comprises: the hearing aid comprises a hearing aid frequency response curve 31, a psychoacoustic model 32, a Chinese acoustic model 33, a parameter verification model 34 and a target gain curve 35, wherein a core algorithm formed by the models is calculated and corrected to obtain a target curve, the hearing aid frequency response curve plays a role in correcting a hearing aid product standard curve in a fitting prescription, the psychoacoustic model is related to a corrected value of speech definition and loudness, the Chinese acoustic model is related to a corrected value of sound quality, and the parameter calibration model is related to noise, filtering, feedback and other things.
As shown in fig. 4, the embodiment of the present invention includes:
the hearing aid frequency response curve 31 comprises: 50 curves, 60 curves, 90 curves, output curves of the output, the curves comprising: frequencies from 125Hz to 8000Hz were used to correct the initial output curve data for each hearing aid, averaged.
As shown in fig. 5, the embodiment of the present invention includes:
the psychoacoustic model 32 includes: the speech articulation model and the hearing impaired comfort model aim to provide a corrected value of a frequency response curve in various environments.
As shown in fig. 6, the embodiment of the present invention includes:
the chinese acoustic model 33 includes: setting of time constants in various environments.
As shown in fig. 7, the embodiment of the present invention includes:
the parameter verification model 34 includes: time noise, feedback, filtering settings under various environments.
As shown in fig. 8, the embodiment of the present invention includes:
the target gain curve 35 includes: 50 curves, 55 curves, 60 curves, 65 curves, 70 curves, 75 curves, 80 curves, 85 curves, 90 curves, the curve frequencies include: 125Hz-8000Hz, and finally obtaining the gain curve value required by the patient through the prescription of the hearing aid.
As shown in fig. 9, the embodiment of the present invention includes:
the prescription output module includes but is not limited to: the hearing aid comprises a channel gain setting interface, a channel compression setting interface, a channel MPO output interface, a scene setting interface, a wind noise setting interface, an instantaneous noise setting interface, a mode setting interface, a frequency band setting interface, a frequency division point setting interface, a tinnitus device setting interface, a feedback setting interface, a frequency shift setting interface, a noise reduction setting interface, a time constant setting interface, a filtering setting interface and the like, wherein the interfaces are used for adjusting and burning various functions of the hearing aid according to output parameters.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A prescription checking and matching of a hearing aid is characterized by comprising a prescription checking and matching input module, a prescription checking and matching acoustic processing module and a prescription checking and matching output module;
the fitting prescription input module is an input interface used for inputting hearing loss data, speech test data, real ear test data, acoustic parameters, compression parameters and hearing aid types of a patient;
the acoustic processing module of the prescription checking realizes effective audibility by using a psychoacoustic model and a Chinese acoustic model, and a target value of large sound frequency response, a target value of medium sound frequency response and a target value of small sound frequency response are respectively calculated by a core algorithm generator;
the fitting prescription output module is used for generating a function from the target curve and outputting performance configuration which can be used for automatically adjusting various parameters of the hearing aid, so that the hearing aid compensation effect which accords with each patient is automatically adjusted.
2. The prescription input module of claim 1, comprising: the hearing loss data of the patient comprises a computer end, a mobile end, air conduction input by a cloud end, bone conduction, an uncomfortable domain and a masking value, and the speech test data comprises but is not limited to speech discomfort valve, speech resolution, ambient noise speech resolution, speech acceptance threshold (SRT), speech perception threshold (SDT), optimal loudness level and speech perception domain; the real ear test data includes, but is not limited to, real ear non-hearing response (REUR), real ear coupled cavity difference (RECD), real ear reading difference (REDD); the acoustic parameters include, but are not limited to, hearing aid profile, microphone type, sound tube profile, earplug size, vent size, and power level, and the hearing profile includes: 125Hz, 250Hz, 500Hz, 750Hz, 1000Hz, 1500Hz, 2000Hz, 3000Hz, 4000Hz, 6000Hz, 8000Hz, the real ear curve includes: 125Hz to 8000Hz,1/3 octaves.
3. The prescription-checking acoustic processing module of claim 1, which comprises a hearing aid frequency response curve, a psychoacoustic model, a Chinese acoustic model and a parameter checking model, wherein the hearing aid frequency response curve comprises a 50 curve, a 60 curve, a 90 curve and an output curve of an output, the curve comprises a frequency of 125Hz to 8000Hz, the psychoacoustic model comprises a Speech Intelligibility Index (SII) and a hearing-impaired person comfort model, the Chinese acoustic model comprises a channel time constant, an AGCO time constant and a channel expansion time constant, the parameter checking model comprises noise reduction, wind noise, transient noise, feedback, filtering, frequency shift and scenes, and the transmission is made according to a transmission protocol, which comprises a Bluetooth general protocol, a B L E protocol, a HI-PRO protocol and a USB protocol.
4. The prescription-dispensing acoustic processing module of claim 1, comprising: the target gains of the prescription of the hearing aid comprise 50 curve target gains, 55 curve target gains, 60 curve target gains, 65 curve target gains, 70 curve target gains, 75 curve target gains, 80 curve target gains, 85 curve target gains and 90 curve target gains, and the frequency of the curves is from 125Hz to 8000 Hz.
5. The prescription output module of claim 1, comprising: the device comprises a channel gain setting interface, a channel compression setting interface, a scene setting interface, a wind noise setting interface, an instantaneous noise setting interface, a mode setting interface, a frequency band setting interface, a frequency dividing point setting interface, a tinnitus device setting interface, a feedback setting interface, a frequency shift setting interface, a noise reduction setting interface, a time constant setting interface, a filtering setting interface and a channel MPO output interface.
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Cited By (2)
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| CN112653980A (en) * | 2021-01-12 | 2021-04-13 | 东南大学 | Interactive self-checking and matching method for intelligent hearing aid |
| CN114786107A (en) * | 2022-05-10 | 2022-07-22 | 东南大学 | Intelligent hearing aid nonlinear fitting formula implementation method |
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