CN108209934A - Hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission - Google Patents
Hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission Download PDFInfo
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Abstract
The present invention relates to a kind of hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission, which includes sound card, acoustic sensor, computer and signal feedback device；The input terminal connection sound card of Microspeaker, the output terminal connection sound card of mini microphone, signal feedback device connects computer, hearing sensitivity comprehensive detection system is provided in computer, test execution system includes the intensity sensitivity detection module based on SFOAEs and the frequency sensitivity detection module based on SFOAEs, intensity sensitivity detection module based on SFOAEs is used for the frequency of stimulation otoacoustic emission data by detecting each Frequency point, determines the corresponding sense of hearing intensity threshold of corresponding frequencies point；Frequency sensitivity detection module based on SFOAEs inhibits tuning curve for extracting the frequency of stimulation otoacoustic emission at assigned frequency point, determines the frequency sensitivity in assigned frequency point.
Description
Technical field
The present invention relates to a kind of sense of hearing detecting system, especially with regard to one kind based on frequency of stimulation otoacoustic emission to sense of hearing system
The intensity sensitivity and frequency sensitivity of system carry out objective, quantitative, comprehensive detection hearing sensitivity detecting system.
Background technology
Otoacoustic emission (Otoacoustic Emissions, OAEs) is that one kind results from inner ear cochlea, through auditory ossicular chain and drum
Film, conduction are discharged into the weak audio energy of external auditory canal, are a parts for human ear normal function.The phenomenon is in 1978 by Britain
Scholar David Kemp have found and are applied to clinic for the first time.The discovery of otoacoustic emission confirms that cochlea is slightly felt as sense of hearing end
Receiver, passively can not only be converted into bioelectrical signals by extraneous acoustical signal and be passed to maincenter causing the sense of hearing, exist simultaneously main
Dynamic exoergic process, so as to establish the theory that cochlea is a bidrectional transducer.Since the presence or absence of OAE becomes the evaluation sense of hearing
The whether intact objective indicator of peripheral-system function, therefore for physiological Study is listened to provide completely new concept and research side
To its discovery becomes modern and listens one of important breakthrough of physiology.According to the presence or absence of environmental stimuli sound, otoacoustic emission can be divided into
Spontaneous otoacoustic emission (Spontaneous Otoacoustic Emissions, SOAEs) and induction otoacoustic emission (Evoked
Otoacoustic Emissions, EOAEs) two major class.EOAEs according to induce stimulation sound difference, and can be divided into transient state induction
Otoacoustic emission (Transient-Evoked Otoacoustic Emissions, TEOAEs), distortion product otoacoustic emissions
(Distortion-Product Otoacoustic Emissions, DPOAEs) and frequency of stimulation otoacoustic emission (Stimulus-
Frequency Otoacoustic Emissions, SFOAEs) three classes.
At present clinically to threshold of audibility strength test using the method for subjective behavior reaction audiometry, such as：Pure tone test,
This method for needing subjective cooperation can not carry out objective examination to infant.And the Transient Evoked Otoacoustic Emissions clinically used
(TEOAEs) and the test of distortion product otoacoustic emissions (DPOAEs) can only carry out qualitatively screening, and it is normal to provide sense of hearing periphery function
Whether screening results, lack the quantitative testing result to intensity sensitivity (listening threshold value).Therefore, clinically lack to listening at present
The intensity sensitivity of feel system carries out quantitative, objective, comprehensive detection method.In addition, clinically there are no to auditory system
Objective, quantitative, the comprehensive detection method of frequency sensitivity.
Frequency of stimulation otoacoustic emission (SFOAEs) be inner ear cochlea by the signal stimulus of single-frequency after, actively send out
The faint voice signal identical with stimulation acoustic frequency.Since it can reflect the active mechanisms of Cochlear out hair cell, thus into
One step reflects the function of sense of hearing peripheral-system.Therefore, frequency of stimulation otoacoustic emission have it is objective, quantitative, non-invasively detect the sense of hearing
The potentiality of system function.Since the frequency of frequency of stimulation otoacoustic emission is identical with the frequency of stimulation sound, therefore it is referred to as piercing
Swash frequency otoacoustic emissions.The intensity of frequency of stimulation otoacoustic emission is very low, usually between -15dB SPL to+20dB SPL.Its
Frequency sensitivity under a certain characteristic frequency can use frequency of stimulation otoacoustic emission to inhibit the tuning representated by tuning curve special
The Q values of property characterize.SFOAEs under pure tone stimulation is the pure tone identical with stimulation acoustic frequency, therefore the intensity of SFOAEs has
It is reflected in the potentiality of the Hearing Threshold under a certain frequency with having objective quantitative.Due to SFOAEs signals with stimulation acoustical signal in frequency domain
Under be complete aliasing；And within the most of the time, SFOAEs signals and stimulus artifact are also aliasing under time domain.This
Outside, relative to the intensity of stimulation sound, the intensity of SFOAEs signals is also minimum, and usual SFOAEs intensity is lower 30dB than stimulation sound
SPL or so is even more.Therefore, reflect the threshold value of sense of hearing intensity to quantify, objectively using SFOAEs signals, need more multiple
Miscellaneous detection technique inhibits stimulation sound artefact.
In the prior art, number of patent application 200910237175.3, a kind of entitled " portable all-purpose otoacoustic emission hair
Penetrate detecting system " the Portable ear acoustic emission detection system based on USB multimedia sound cards is disclosed, based on VC++Studio
On 2005 software platforms, realize to Transient Evoked Otoacoustic Emissions (TEOAEs) and the complete of otoacoustic emission (DPOAEs) signal that distort
Function quantitative detection and analysis.But the patent without reference to frequency of stimulation otoacoustic emission detection and using SFOAEs into
The intensity of row auditory system listens the technology and methods that threshold value objective quantitative detects, meanwhile, also without reference to utilization SFOAE STCs
Carry out the technology and methods of the quantitative detection of the frequency sensitivity of auditory system；In addition, number of patent application is
201210333260.1 entitled " a kind of frequency of stimulation otoacoustic emission tuning curve detection and calibration system " only discloses
The detection method of frequency of stimulation otoacoustic emission tuning curve and the detection technique of calibration system, but stimulate frequency without reference to utilizing
The intensity that rate otoacoustic emission carries out auditory system listens objective, the technology and methods that quantitatively detect of threshold value, also without reference to utilization
SFOAE STCs carry out the detailed technology and method that the frequency sensitivity of auditory system quantitatively detects.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of hearing sensitivity inspections based on frequency of stimulation otoacoustic emission
Examining system can not only be realized by the test of frequency of stimulation otoacoustic emission to the intensity resolution sensitivity at different frequency
Quantitative, objective detection；But also the test of tuning curve can be inhibited by frequency of stimulation otoacoustic emission, it completes to different frequency
Quantitative, the objective detection of the frequency discrimination sensitivity at place.
To achieve the above object, the present invention takes following technical scheme：A kind of sense of hearing based on frequency of stimulation otoacoustic emission
Sensitivity technique system, which is characterized in that the detecting system includes sound card, acoustic sensor and computer, wherein, the acoustics
Sensor includes Microspeaker and mini microphone；Hearing sensitivity comprehensive detection system is provided in the computer, is wrapped
Include driver of sound card system and test execution system；The driver of sound card system is sent out for the sound card to be driven to receive the computer
The signal gone out, and pass through the Microspeaker and be sent in subject's ear；The sound card is driven to receive by described miniature simultaneously
The signal that microphone is beamed back, and send it to test execution system；The test execution system is included based on the strong of SFOAEs
Spend sensitivity technique module and the frequency sensitivity detection module based on SFOAEs, the intensity sensitivity inspection based on SFOAEs
Survey module is used for the frequency of stimulation otoacoustic emission data by detecting each Frequency point, determines the corresponding sense of hearing intensity of corresponding frequencies point
Threshold value；The frequency sensitivity detection module based on SFOAEs is sent out for extracting the frequency of stimulation otoacoustic emission at assigned frequency point
Inhibition tuning curve is penetrated, determines the frequency sensitivity in assigned frequency point.
Further, the intensity sensitivity detection module based on SFOAEs includes stimulation sound parameter setting module, suppression
Sound parameter setting module processed, stimulation acoustical signal generation module inhibit acoustical signal generation module, stimulation acoustical signal stimulating module, suppression
Acoustical signal stimulating module processed, detection signal acquisition module, signal processing module, frequency-domain waveform display module, test data are shown
Module, intensity sensitivity modular converter and test result report generation and preserving module；The stimulation sound parameter setting module
For stimulation acoustic frequency, frequency range, stimulation acoustic frequency to be set to test step-length and stimulus intensity；The inhibition sound parameter setting
Module is used to set the frequency and intensity of inhibition sound；The stimulation acoustical signal generation module and inhibition acoustical signal generation module difference
Number stimulation acoustical signal accordingly and number inhibition acoustical signal are generated according to the parameter of setting and send corresponding signal to the thorn
Swash acoustical signal stimulating module and inhibit acoustical signal stimulating module；The stimulation acoustical signal stimulating module and inhibition acoustical signal stimulation mould
Block sends out stimulation acoustical signal and inhibits acoustical signal through in the sound card and Microspeaker to subject's ear, the mini microphone
It receives and the sound card is sent to after the signal that subject's external auditory canal is beamed back is amplified, signal is carried out A/D conversions by the sound card
After be sent to the detection signal acquisition module, the signal of acquisition is sent at the signal by the detection signal acquisition module
Module is managed, the signal processing module extracts the frequency of stimulation otoacoustic emission under different stimulated frequency, and testing result is divided
It is not sent to the frequency-domain waveform display module, test data display module, intensity sensitivity modular converter and test result
Report generation and preserving module, the width of the detection datas of the waveform display module Dynamic Announce SFOAEs at different frequencies
Degree, baseline, phase and noise waveform；The detections of the test data display module Dynamic Announce SFOAEs at different frequencies
Data include amplitude, waveform, phase, baseline and noise, and the intensity sensitivity modular converter is grouped according to detection frequency,
Cluster analysis is carried out according to amplitude, waveform, baseline and noise in each grouping, further according to priori numerical relationship model, must be provided
The intensity sensitivity numerical value of body；The test result report generation and preserving module are used to generate and preserve all inspections of subject
Survey result and test information.
Further, the specific calculating process of the intensity sensitivity modular converter is：Occur according at detection frequency
Signal spectrum be divided into four classes：
The first kind：Do not occur pure tone frequency spectrum or 0dB is less than for signal-to-noise ratio；
Second class：There is pure tone frequency spectrum and signal-to-noise ratio is higher than 10dB；
Third class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB and 10dB；
4th class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0dB；
Secondary classification is carried out for the first kind, if there is not pure tone frequency spectrum, detection failure is determined as, detects again
Or frequency detecting is changed, less than 0dB but baseline 6dB is above for signal-to-noise ratio, then SFOAEs intensity sensitivities=a* (SFOAE
Amplitude-baseline amplitude), a values are configured according to place frequency difference；
For the second class, there is pure tone frequency spectrum and signal-to-noise ratio is higher than the carry out secondary classification of 10dB, baseline is higher than
Noise more than 3dB, then SFOAEs intensity sensitivities=b* (SFOAE amplitudes-baseline amplitude)+c* (SFOAE baseline amplitudes-make an uproar
Sound amplitude), b, c value are configured according to place frequency difference；Noise figure is more than less than 3dB for baseline, then SFOAEs is strong
Sensitivity mathematical model=d* (SFOAE amplitudes-baseline amplitude) is spent, d values are configured according to place frequency difference；
For third class, there is pure tone frequency spectrum and carry out secondary classification of the signal-to-noise ratio between 5dB and 10dB, for base
Line is higher than noise, then SFOAEs intensity sensitivities=e* (SFOAE amplitude-f* baseline amplitudes), is less than noise for baseline,
Then SFOAEs intensity sensitivities=g* (SFOAE amplitude-h* noise amplitudes), e, f, g, h value are set according to place frequency difference
It puts；
For the 4th class, there is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0dB, secondary classification is carried out, for base
Line is higher than noise, then SFOAEs intensity sensitivities=i* (SFOAE amplitude-j* noise amplitudes), is less than noise for baseline,
Then SFOAEs intensity sensitivities=k* (SFOAE amplitude-l* baseline amplitudes), i, j, k, l value are set according to place frequency difference
It puts.
Further, the SFOAEs frequency sensitivities detection module includes stimulation sound parameter setting module, inhibition sound is joined
Number setup module, stimulation acoustical signal generation module inhibit acoustical signal generation module, stimulation acoustical signal stimulating module, inhibition sound letter
Number stimulating module, detection signal acquisition module, detection signal processing module, SFOAE STCs waveforms display module, test data
Display module, frequency sensitivity modular converter, test result report generation and preserving module；The stimulation sound parameter setting module
For setting stimulation acoustic frequency and stimulation sound intensity；The inhibition sound parameter setting module for set inhibit the acoustic frequency upper limit,
Inhibit acoustic frequency lower limit, inhibit acoustic frequency step-length and inhibit criterion；The stimulation acoustical signal generation module and inhibition acoustical signal life
Corresponding digital stimulus signal is generated according to the parameter of setting into module and number inhibits signal；The stimulation acoustical signal stimulates mould
Block and inhibition acoustical signal stimulating module send out stimulation sound and different frequency under frequency of stimulation through the sound card and Microspeaker
In the inhibition sound to subject's ear of varying strength, the frequency of inhibition sound is in the range of frequency of stimulation or so with the inhibition sound of setting
Frequency step is adjusted, and the mini microphone is sent to the sound card after the signal in duct is amplified, most afterwards through described
Detection signal acquisition module is sent to the detection signal processing module, and the detection signal processing module extraction inhibits acoustic frequency
In the range of it is each inhibit frequency under, meet setting inhibit criterion frequency of stimulation otoacoustic emission obtain the survey of SFOAE STCs curves
Test result, the SFOAE STCs waveforms display module are used to show test waveform；The test data display module dynamic is aobvious
Showing the detection datas of SFOAE STCs at different frequencies, the frequency sensitivity modular converter is grouped detection frequency,
Cluster Classification is carried out, and close according to priori mathematics according to the amplitude of SFOAE STCs curves, waveform, baseline and noise in each group
It is model, obtains specific frequency sensitivity numerical value；The test result report generation and preserving module are used to generate and preserve
All testing results of subject and test information.
Further, the specific calculating process of the frequency sensitivity modular converter is：Occur according at detection frequency
SFOAE STCs curve shapes and position be divided into two classes, the first kind is the SFOAE STCs curves for occurring Double Tops point, the second class
To there are the SFOAE STCs curves on single vertex；
For the first kind, the SFOAE STCs curves for Double Tops point occur carry out secondary classification, if vertex is higher than the stimulation sound intensity
It spends, then the high-end slope-c* low end slopes of frequency sensitivity=a*Q10+b*, if vertex is less than stimulation sound intensity, frequency sensitivity
Degree=a*Q10；
Occur the SFOAE STCs curves on single vertex for the second class, if right avertence is moved, frequency sensitivity=d*Q10+e*
(high-end slope-f* low end slopes), if left avertence is moved, frequency sensitivity=g*Q10+h* (high-end slope), if without offset, frequency
Rate sensitivity=i*Q10, wherein, Q10 refers to the quality factor of 10dB points, according to detected frequency difference, choose different a,
B, c, d, e, f, g and h value.
Further, which further includes the pure tone test detection module that resolution ratio is 1dB, the pure tone test inspection
Surveying module uses subjective behavioral approach to obtain listening threshold value for 1dB in each Frequency point punishment resolution, for being based on described
The result of SFOAEs intensity sensitivity detection modules is compared, and establishes listening for intensity detection and pure tone test based on SFOAEs
Feel the relationship model of threshold value.
Further, which further includes psychological physic tuning curve detection module, and the psychological physic tuning is bent
Line detection module obtains the frequency sensitivity at assigned frequency point using subjective behavioral approach, for based on SFOAEs frequencies
The result of sensitivity technique module is compared, by the frequency for establishing frequency sensitivity testing result and PTCs based on SFOAEs
Relationship model between rate sensitivity technique result.
Further, which further includes preamplifier, and the input terminal connection of the preamplifier is described micro-
The output terminal of type microphone, the output terminal of the preamplifier connect the sound card.
Further, which further includes signal feedback device, and the signal feedback device connects the computer,
Signal feedback is carried out for subject and the feedback result of subject is sent to the computer；The signal feedback device is adopted
With handle, the handle connects the computer by USB interface.
The present invention has the following advantages due to taking above technical scheme：1st, the present invention's is clever based on SFOAEs intensity
The test module (including the test module under routine test module and assigned frequency point) of sensitivity is for objective, quantitative, rapidly
Intensity sensitivity under Frequency point set by extraction, being capable of clinically objective detection threshold of audibility.2nd, it is of the invention based on stimulation
Frequency otoacoustic emissions inhibit the test of tuning curve (SFOAE STCs), realize to the frequency discrimination sensitivity at different frequency
Quantitative, objective detection, and with the frequency sensitivity detected by the psychological physic tuning curve (PTCs) of subjective behavior reaction
Distinguishing results are compared, and can be realized clinically to the quantitative detection of frequency discrimination sensitivity.3rd, the present invention is SFOAEs's
Frequency domain, time domain with stimulation sound aliasing in the case of, extract faint SFOAEs signals, using the intensity of SFOAEs signals come
Intensity sensitivity (listening threshold value) that is objective, quantitatively reflecting auditory system, frequency of stimulation otoacoustic emission inhibit tuning curve
(SFOAE STCs) is the tuning curve under a certain frequency of stimulation, has and is reflected in cochlea resolution frequency sensitivity under the frequency
Potentiality, using SFOAE STCs it is objective, quantitatively reflect auditory system frequency sensitivity, to sum up, it is of the invention based on
The intensity sensitivity of SFOAEs and the test of frequency sensitivity are realized to the objective, quantitative, comprehensive, rapidly of auditory system
Detection has extensive sense of hearing potential applicability in clinical practice.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the test execution system principle schematic diagram of the present invention；
Fig. 3 is the normal detection module principle schematic of the intensity sensitivity based on SFOAEs of the present invention；
Fig. 4 is the frequency sensitivity detection module principle schematic based on SFOAE STCs of the present invention；
Fig. 5 is the flow diagram that the resolution ratio of the present invention is the pure tone test detection module of 1dB；
Fig. 6 is the flow diagram of the detection module of the psychological physic tuning curve (PTCs) of the present invention.
Specific embodiment
Come to carry out the present invention detailed description below in conjunction with attached drawing.It should be appreciated, however, that attached drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.
As shown in Figure 1, the hearing sensitivity detecting system provided by the invention based on frequency of stimulation otoacoustic emission, for obtaining
The intensity sensitivity and frequency sensitivity of frequency of stimulation otoacoustic emission are taken, it is (miniature including computer 1, sound card 2, acoustic sensor
Probe) 3, preamplifier and signal feedback device；Wherein, acoustic sensor 3 includes Microspeaker 31 and mini microphone
32, in order to which sound in subject's external auditory canal is isolated with external sound, Microspeaker 31 and mini microphone 32 can be inserted
It is located in same soft earplug.
Using the multimedia sound card that can be connect with computer 1, the digital signal for computer 1 to be sent out turns sound card 2
Change analog voltage signal into, the present invention has 24bit sampling depths, highest using what is produced by RME companies when being detected
The portable multimedia sound card that sample rate is 192kHz connects computer 1 by IEEE1394 interfaces, as example, is not limited to
This, sound card 2 can also use other structures form and connection mode, such as the multimedia sound of computer 1 is connected by USB interface
Card or common sound card.
Microspeaker 31 includes two electro-acoustic transducers for generating stimulation sound and inhibition sound respectively, is stimulated for inducing
Frequency otoacoustic emissions signal, two electro-acoustic transducers are plugged in by two sound pipes in earplug, the input of two electro-acoustic transducers
End connects sound card 2 respectively by two TRS interfaces, for analog voltage signal progress electroacoustic to be converted into acoustical signal, through earplug
It is sent in subject's ear.The various products of prior art may be used in Microspeaker 31, for example are used during present invention detection
The ER2 insert earphones of Etymotic companies production.
Mini microphone 32 includes sound-electric energy converter, other in otoacoustic emission signal and human ear external auditory canal for acquiring
Signal, and the acoustical signal acquired is converted into electric signal, the input terminal of mini microphone 32 is plugged in earplug through transmitting sound pipe
Interior, acoustical signal is converted to analog voltage signal, miniature wheat by the voice signal in duct by transmitting sound pipe to sound-electric energy converter
The input terminal of the output terminal connection preamplifier of gram wind 32.The various products of prior art may be used in mini microphone 32,
Such as the ER-10B+ produced during present invention detection using Etymotic companies of the U.S..
For preamplifier for the signal that mini microphone 32 exports to be amplified, amplification factor can be according to practical need
It is adjusted, 0dB, 20dB and 40dB can be selected by adjusting multiple.It is preposition in order to avoid the signal interference that earth-return circuit is brought
Amplifier is using two section 9V battery powereds, the output terminal connection sound card 2 of preamplifier.
Signal feedback device connects computer 1, carries out signal feedback for subject and sends out the feedback result of subject
Computer 1 is sent to, various devices may be used in signal feedback device, and signal feedback device of the invention uses handle 4, handle 4
Computer 1 is connected by USB interface.
As shown in Fig. 2, hearing sensitivity comprehensive detection system is provided in computer 1, including driver of sound card system and survey
Try execution system.Driver of sound card system is used to sound card 2 be driven to receive the signal that computer 1 is sent out, and pass through Microspeaker 31
It is sent in subject's ear；Sound card 2 is driven to receive the signal beamed back by preamplifier, and send it to test execution simultaneously
System.
Test execution system includes the intensity sensitivity detection module based on SFOAEs, the frequency sensitivity based on SFOAEs
Detection module, pure tone test (PT) detection module that resolution ratio is 1dB and the detection based on psychological physic tuning curve (PTCs)
Module.
The detection module of intensity sensitivity based on SFOAEs is used to send out by the frequency of stimulation otoacoustic emission for detecting each Frequency point
The amplitude penetrated, waveform, baseline, phase, noise, determine the corresponding sense of hearing intensity threshold of corresponding frequencies point；
Frequency sensitivity detection module based on SFOAEs is sent out for extracting the frequency of stimulation otoacoustic emission at assigned frequency point
It penetrates and inhibits tuning curve (SFOAE STCs), determine the frequency sensitivity in assigned frequency point；
The pure tone test detection module that resolution ratio is 1dB use subjective behavioral approach obtain each Frequency point punish resolution for
1dB's listens threshold value, and for being compared with the result based on SFOAEs intensity sensitivity detection modules, early stage establishes and is based on
The relationship model of the intensity detection of SFOAEs and the threshold of audibility of pure tone test is realized to detect with pure tone test clinically and be tied
The consistent detection of the intensity sensitivity based on SFOAEs of fruit；
Psychological physic tuning curve detection module obtains the frequency sensitivity at assigned frequency point using subjective behavioral approach
For being compared with the result based on SFOAEs frequency sensitivity detection modules, the frequency based on SFOAEs is established in early stage for degree
Relationship model between rate sensitivity technique result and the frequency sensitivity testing result of PTCs, realize applied to it is clinical based on
SFOAEs frequency sensitivities detect.
In a preferred embodiment, as shown in figure 3, the intensity sensitivity detection module based on SFOAEs is used for each
Frequency is tested, including stimulation sound parameter setting module, inhibition sound parameter setting module, stimulation acoustical signal generation module, suppression
Acoustical signal generation module processed, stimulation acoustical signal stimulating module inhibit acoustical signal stimulating module, detection signal acquisition module, signal
Processing module, frequency-domain waveform display module, test data display module, intensity sensitivity modular converter and test result report
Generation and preserving module.Stimulation sound parameter setting module is used to that the frequency of stimulation sound, frequency range, stimulation acoustic frequency to be set to test
Step-length and stimulus intensity；Inhibition sound parameter setting module is used to set the frequency and intensity of inhibition sound；Acoustical signal is stimulated to generate
Module and inhibition acoustical signal generation module generate corresponding number stimulation acoustical signal according to the parameter of setting respectively and inhibit with number
Acoustical signal simultaneously sends corresponding signal to stimulation acoustical signal stimulating module and inhibits acoustical signal stimulating module；Acoustical signal is stimulated to stimulate mould
Block and inhibition acoustical signal stimulating module send out stimulation acoustical signal and acoustical signal are inhibited to arrive subject through sound card 2 and Microspeaker 31
In ear, mini microphone 32 receives the signal that subject's external auditory canal is beamed back, and sends it to after preamplifier is amplified and sends out
Sound card 2 is sent to, signal is carried out A/D conversions and sends detection signal acquisition module by sound card 2, detects signal acquisition module by acquisition
Signal is sent to signal processing module, and signal processing module extracts the frequency of stimulation otoacoustic emission under different stimulated frequency, and
By testing result be separately sent to frequency-domain waveform display module, test data display module, intensity sensitivity modular converter and
Test result report generation and preserving module.The detection datas of waveform display module Dynamic Announce SFOAEs at different frequencies
Amplitude, baseline, phase and noise waveform；The testing numbers of test data display module Dynamic Announce SFOAEs at different frequencies
According to (amplitude, waveform, phase, baseline and noise), intensity sensitivity modular converter is grouped according to detection frequency；In each grouping
It is interior that cluster analysis is carried out according to amplitude, waveform, baseline and noise, further according to priori numerical relationship model, obtain specific intensity
Sensitivity number；Test result report generation and preserving module are used to generate and preserve all testing results and the test of subject
Information.
In a preferred embodiment, intensity sensitivity modular converter is grouped according to detection frequency, in each grouping
It is interior that cluster analysis is carried out according to amplitude, waveform, baseline and noise, further according to priori numerical relationship model, obtain specific intensity
Sensitivity number, detailed process are：
Signal spectrum according to occurring at detection frequency is divided into four classes：
The first kind：Do not occur tonal signal frequency spectrum or 0dB is less than for signal-to-noise ratio；
Second class：There is pure tone frequency spectrum and signal-to-noise ratio is higher than 10dB；
Third class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB and 10dB；
4th class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0；
In the first kind, then secondary classification is carried out, if there is not tonal signal frequency spectrum, is determined as detection failure,
Again frequency detecting (may be with occurring and SOAE overlapping phenomenons) is detected or changes, for signal-to-noise ratio less than 0dB but higher than baseline 6dB
, then SFOAEs intensity sensitivities=a* (SFOAE amplitudes-baseline amplitude), a values are configured according to place frequency difference；
For the second class, there is pure tone frequency spectrum and signal-to-noise ratio is higher than 10dB, then carries out secondary classification, for baseline height
In noise more than 3dB, then SFOAEs intensity sensitivities=b* (SFOAE amplitudes-baseline amplitude)+c* (SFOAE baseline amplitudes-
Noise amplitude), according to detected frequency difference, select suitable b, c value；Noise figure is more than for baseline and is less than 3dB, then
SFOAEs intensity sensitivities mathematical model=d* (SFOAE amplitudes-baseline amplitude).According to detected frequency difference, choose different
D values；
For third class, there is pure tone frequency spectrum and signal-to-noise ratio is between 5dB and 10dB, then carry out secondary classification, it is right
In baseline higher than noise, then SFOAEs intensity sensitivities=e* (SFOAE amplitude-f* baseline amplitudes), is less than baseline and makes an uproar
Sound, then SFOAEs intensity sensitivities=g* (SFOAE amplitude-h* noise amplitudes) chooses different according to detected frequency difference
E, f, g, h value；
For the 4th class, there is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0；Secondary classification is then carried out, for base
Line is higher than noise, then SFOAEs intensity sensitivities=i* (SFOAE amplitude-j* noise amplitudes), is less than noise for baseline,
Then SFOAEs intensity sensitivities=k* (SFOAE amplitude-l* baseline amplitudes), according to detected frequency difference, choose different i,
J, k, l value
In a preferred embodiment, as shown in figure 4, SFOAEs frequency sensitivities detection module includes stimulation sound parameter
Setup module, stimulation acoustical signal generation module, inhibits acoustical signal generation module, stimulation acoustical signal at inhibition sound parameter setting module
Stimulating module inhibits acoustical signal stimulating module, detection signal acquisition module, detection signal processing module, SFOAE STCs waveforms
Display module, test data display module, frequency sensitivity modular converter, test result report generation and preserving module.Stimulation
Sound parameter setting module stimulates acoustic frequency and stimulation sound intensity for setting；Inhibition sound parameter setting module is used to set inhibition sound
Upper frequency limit inhibits acoustic frequency lower limit, inhibits acoustic frequency step-length and inhibits criterion；Stimulate acoustical signal generation module and inhibition sound letter
Number generation module generates corresponding digital stimulus signal according to the parameter of setting and number inhibits signal；Acoustical signal is stimulated to stimulate mould
Block and acoustical signal stimulating module is inhibited to send out stimulation sound under frequency of stimulation and different frequency not through sound card 2 and Microspeaker 31
With in the inhibition sound to subject's ear of intensity, the frequency of inhibition sound is in the range of frequency of stimulation or so with the inhibition audio frequency of setting
Rate step-length is adjusted, and the signal in duct is sent to sound card 2 by mini microphone 32 through preamplifier, is finally believed after testing
Number acquisition module is sent to detection signal processing module, and detection signal processing module extraction inhibits each inhibition in the range of acoustic frequency
Under frequency, meet the frequency of stimulation otoacoustic emission that setting inhibits criterion, detailed process is：It is continuously increased or reduces the strong of inhibition sound
Degree stops adjustment, then point (corresponding inhibition at this time when frequency of stimulation otoacoustic emission residual quantity reaches when setting inhibits criterion
Frequency point and inhibition strength) be in frequency of stimulation otoacoustic emission tuning curve a bit；The rest may be inferred measures next inhibition
Frequency point is frequency of stimulation otoacoustic emission by the different each point-by-point lines of point inhibited under frequency in the range of acoustic frequency are inhibited
The test result of tuning curve, SFOAE STCs waveforms display module are used to show test waveform；Test data display module moves
State shows the detection datas (amplitude, baseline and noise) of SFOAE STCs at different frequencies；Frequency sensitivity modular converter is first
First it is grouped according to detection frequency；Then in each group, according to the amplitude of SFOAE STCs curves, waveform, baseline and noise
Carry out Cluster Classification；In inhomogeneity, according to priori numerical relationship model, specific frequency sensitivity numerical value is obtained；Test knot
Fruit report generation and preserving module are used to generate and preserve all testing results of subject and test information.
In a preferred embodiment, frequency sensitivity modular converter is grouped first according to detection frequency；Then
In each group, Cluster Classification is carried out according to the amplitude of SFOAE STCs curves, waveform, baseline and noise；In inhomogeneity, according to
Priori numerical relationship model, the detailed process for obtaining specific frequency sensitivity numerical value are：
SFOAE STCs curve shapes and position according to occurring at detection frequency are divided into two classes, the sum for Double Tops point occur
There are the SFOAE STCs curves on single vertex.
For the first kind, there are the SFOAE STCs curves of Double Tops point, then carry out secondary classification, if vertex is higher than stimulation sound
Intensity, then the high-end slope-c* low end slopes of frequency sensitivity=a*Q10 (quality factor of 10dB points)+b*, are pierced if vertex is less than
Swash sound intensity, then frequency sensitivity=a*Q10 (quality factor of 10dB points)；
2) occur the SFOAE STCs curves on single vertex for the second class, if right avertence is moved, frequency sensitivity=d*Q10
(quality factor of 10Db points)+e* (high-end slope-f* low end slopes), if left avertence is moved, frequency sensitivity=g*Q10 (10Db
The quality factor of point)+h* (high-end slope), if without offset, frequency sensitivity=i*Q10 (quality factor of 10Db points), root
According to detected frequency difference, different a, b, c, d, e, f, g and h values is chosen.
In a preferred embodiment, as shown in figure 5, the pure tone test detection module that resolution ratio is 1dB includes handle
Configuration module, feedback signal receiving module, test-types selecting module, test parameter selecting module, testing and control analysis module,
Tonal signal stimulating module, interpretation of result module and display module；Handle configurations module is used to bind the button of handle 4
Configuration, and binding configuration result is sent to feedback signal receiving module；Test-types selecting module is used to select test-types (can
Selective test-types include：Rise method and lifting and lowering method)；Test parameter selecting module is used to set test method, test frequency
Rate and pure tone intensity bound；Testing and control analysis module sends test frequency according to the test method and test parameter of selection
Originate test intensity to tonal signal stimulating module with pure tone, tonal signal stimulating module send number pure tone stimulus signal to by
In examination person's ear, feedback signal receiving module receives the judging result that subject is fed back by lever knob, and will determine that result is sent out
Testing and control analysis module is returned, testing and control analysis module increases or decreases pure tone intensity according to result, obtains believing in the pure tone
Number stimulation under listen threshold value, and send it to interpretation of result module and preserved or updated, while judge whether all tests
Frequency listens threshold value all to obtain；If all obtained, draw audiogram and be sent in display module and shown, differentiate
The pure tone test detection module that rate is 1dB is used in big data quantity analysis early period, with the strength test results based on SFOAEs
Founding mathematical models relationship, realization can the intensity sensitivity based on SFOAEs consistent with pure tone test testing result clinically
Detection.
In a preferred embodiment, as shown in fig. 6, the detection module based on psychological physic tuning curve includes handle
Configuration module, test parameter selecting module, test signal generation module, testing control module, test signal stimulating module, feedback
Signal receiving module, interpretation of result module and display module；Handle configurations module is used to that the button of handle 4 bind to match
It puts, and sends binding configuration result to feedback signal receiving module；Test parameter selecting module setting stimulation acoustic frequency, stimulation sound
Intensity and masking sound upper intensity limit；Test signal generation module generates pure tone stimulation sound and sweeps according to each test parameter of reception
Frequency narrow band masking sound, and testing control module is sent to, test signal stimulating module is transmitted a signal to by testing control module, is made
It sends out stimulation sound and masking sound；Feedback signal receiving module receives the judging result that subject is fed back by lever knob, and
It will determine that result beams back testing control module, masking sound intensity increased or decreased, and record masking sound in real time according to result by it
Intensity, and record value is sent to interpretation of result module, masking sound Strength Changes figure is drawn, and put down by interpretation of result module
Sliding and positive negative sense average treatment, obtains psychological physic tuning curve, and send it in display module and shown, based on the heart
The frequency sensitivity detection module for managing physics tuning curve is used in big data quantity analysis early period, with the inhibition based on SFOAEs
The test result founding mathematical models relationship of tuning curve, to obtain the testing result of the frequency sensitivity based on SFOAE STCs
It prepares,
In a preferred embodiment, the intensity sensitivity detection module based on SFOAEs and the frequency based on SFOAEs
The test signal extraction of detection signal acquisition module, that is, frequency of stimulation otoacoustic emission of sensitivity technique module, extracts frequency of stimulation
The method of otoacoustic emission is essentially identical, mainly includes three kinds of existing methods：At non-linear compression, two-tone suppression and spectral smoothing
Reason, each method all extract frequency of stimulation otoacoustic emission using a kind of different cochlea phenomenon or signal processing technology,
Wherein, the method for non-linear compression takes full advantage of the compression growth of frequency of stimulation otoacoustic emission amplitude and the linear increasing of stimulation sound
Long relationship；The method of two-tone suppression is that SFOAEs is defined as near frequency of stimulation, increases inhibition sound and does not increase inhibition sound
Compound difference between detected duct acoustic pressure, it is believed that inhibition sound can reduce or remove in large quantities otoacoustic emission；Frequently
Spectrum smoothing processing is that the frequency spectrum of composite ear road acoustic pressure is carried out process of convolution using smooth function, and analysis method is that thorn is utilized
It is different with the incubation period of otoacoustic emission to swash sound, is equivalent to the adding window in corresponding latent term area.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection mode and manufacture craft etc. are all
It can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not exclude
Except protection scope of the present invention.
Claims (9)
1. a kind of hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission, which is characterized in that the detecting system includes
Sound card, acoustic sensor and computer, wherein, the acoustic sensor includes Microspeaker and mini microphone；The meter
Hearing sensitivity comprehensive detection system is provided in calculation machine, including driver of sound card system and test execution system；
The driver of sound card system is used to that the sound card to be driven to receive the signal that the computer is sent out, and passes through described miniature raise
Sound device is sent in subject's ear；The signal that the sound card reception is driven to be beamed back by the mini microphone simultaneously, and sent out
It is sent to test execution system；
The test execution system includes the intensity sensitivity detection module based on SFOAEs and the frequency sensitivity based on SFOAEs
Detection module is spent, the intensity sensitivity detection module based on SFOAEs is used for the frequency of stimulation ear by detecting each Frequency point
Sound emission data determine the corresponding sense of hearing intensity threshold of corresponding frequencies point；The frequency sensitivity detection mould based on SFOAEs
Block inhibits tuning curve for extracting the frequency of stimulation otoacoustic emission at assigned frequency point, determines the frequency in assigned frequency point
Sensitivity.
2. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as described in claim 1, which is characterized in that described
Intensity sensitivity detection module based on SFOAEs includes stimulation sound parameter setting module, inhibition sound parameter setting module, stimulation
Acoustical signal generation module inhibits acoustical signal generation module, stimulation acoustical signal stimulating module, inhibits acoustical signal stimulating module, detection
Signal acquisition module, signal processing module, frequency-domain waveform display module, test data display module, intensity sensitivity modulus of conversion
Block and test result report generation and preserving module；
The stimulation sound parameter setting module for set stimulation acoustic frequency, frequency range, stimulation acoustic frequency test step-length and
Stimulus intensity；The inhibition sound parameter setting module is used to set the frequency and intensity of inhibition sound；The stimulation acoustical signal generates
Module and inhibition acoustical signal generation module generate corresponding number stimulation acoustical signal according to the parameter of setting respectively and inhibit with number
Acoustical signal simultaneously sends corresponding signal to the stimulation acoustical signal stimulating module and inhibits acoustical signal stimulating module；The stimulation sound letter
Number stimulating module and acoustical signal stimulating module is inhibited to send out stimulation acoustical signal and inhibit acoustical signal through the sound card and miniature raise one's voice
In device to subject's ear, the mini microphone receives after the signal that subject's external auditory canal is beamed back is amplified and is sent to the sound
Card, the sound card are sent to the detection signal acquisition module, the detection signal acquisition module after signal is carried out A/D conversions
The signal of acquisition is sent to the signal processing module, the signal processing module extracts the stimulation under different stimulated frequency
Frequency otoacoustic emissions, and testing result is separately sent to the frequency-domain waveform display module, test data display module, intensity
Sensitivity modular converter and test result report generation and preserving module, the waveform display module Dynamic Announce SFOAEs exist
The amplitude of detection data under different frequency, baseline, phase and noise waveform；The test data display module Dynamic Announce
The detection datas of SFOAEs at different frequencies include amplitude, waveform, phase, baseline and noise, the intensity sensitivity conversion
Module is grouped according to detection frequency, and cluster analysis, then root are carried out according to amplitude, waveform, baseline and noise in each grouping
According to priori numerical relationship model, specific intensity sensitivity numerical value is obtained；The test result report generation and preserving module are used
In generate and preserve subject all testing results and test information.
3. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as claimed in claim 2, which is characterized in that described
The specific calculating process of intensity sensitivity modular converter is：Signal spectrum according to occurring at detection frequency is divided into four classes：
The first kind：Do not occur pure tone frequency spectrum or 0dB is less than for signal-to-noise ratio；
Second class：There is pure tone frequency spectrum and signal-to-noise ratio is higher than 10dB；
Third class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB and 10dB；
4th class：There is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0dB；
Secondary classification is carried out for the first kind, if there is not pure tone frequency spectrum, detection failure is determined as, detects or change again
Frequency detecting, for signal-to-noise ratio less than 0dB but baseline 6dB is above, then SFOAEs intensity sensitivities=a* (SFOAE amplitudes-
Baseline amplitude), a values are configured according to place frequency difference；
For the second class, there is pure tone frequency spectrum and signal-to-noise ratio is higher than the carry out secondary classification of 10dB, noise is higher than for baseline
More than 3dB, then SFOAEs intensity sensitivities=b* (SFOAE amplitudes-baseline amplitude)+c* (SFOAE baseline amplitudes-noise width
Degree), b, c value are configured according to place frequency difference；Noise figure is more than less than 3dB, then SFOAEs intensity spirit for baseline
Sensitivity mathematical model=d* (SFOAE amplitudes-baseline amplitude), d values are configured according to place frequency difference；
For third class, there is pure tone frequency spectrum and carry out secondary classification of the signal-to-noise ratio between 5dB and 10dB, for baseline height
In noise, then SFOAEs intensity sensitivities=e* (SFOAE amplitude-f* baseline amplitudes), is less than noise, then for baseline
SFOAEs intensity sensitivities=g* (SFOAE amplitude-h* noise amplitudes), e, f, g, h value are configured according to place frequency difference；
For the 4th class, there is pure tone frequency spectrum and signal-to-noise ratio is between 5dB-0dB, secondary classification is carried out, for baseline height
In noise, then SFOAEs intensity sensitivities=i* (SFOAE amplitude-j* noise amplitudes), is less than noise, then for baseline
SFOAEs intensity sensitivities=k* (SFOAE amplitude-l* baseline amplitudes), i, j, k, l value are configured according to place frequency difference.
4. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as claimed in claim 1 or 2, which is characterized in that
The SFOAEs frequency sensitivities detection module includes stimulation sound parameter setting module, inhibition sound parameter setting module, stimulation sound
Signal generation module inhibits acoustical signal generation module, stimulation acoustical signal stimulating module, inhibits acoustical signal stimulating module, detection letter
Number acquisition module, detection signal processing module, SFOAE STCs waveforms display module, test data display module, frequency sensitivity
Spend modular converter, test result report generation and preserving module；The stimulation sound parameter setting module stimulates audio frequency for setting
Rate and stimulation sound intensity；The inhibition sound parameter setting module inhibits the acoustic frequency upper limit, inhibition acoustic frequency lower limit, suppression for setting
Acoustic frequency step-length processed and inhibition criterion；The stimulation acoustical signal generation module and inhibition acoustical signal generation module are according to the ginseng of setting
The corresponding digital stimulus signal of number generation and number inhibit signal；The stimulation acoustical signal stimulating module and inhibition acoustical signal stimulation
Module sends out the inhibition sound of stimulation sound under frequency of stimulation and different frequency varying strength extremely through the sound card and Microspeaker
In subject's ear, the frequency of inhibition sound is adjusted in the range of frequency of stimulation or so with the inhibition acoustic frequency step-length of setting,
The mini microphone will be sent to the sound card after the signal amplification in duct, most be passed afterwards through the detection signal acquisition module
It send to the detection signal processing module, the detection signal processing module extraction inhibits each inhibition frequency in the range of acoustic frequency
Under, meet setting inhibit criterion frequency of stimulation otoacoustic emission obtain the test result of SFOAE STCs curves, the SFOAE
STCs waveforms display module is used to show test waveform；The test data display module Dynamic Announce SFOAE STCs are in difference
Detection data under frequency, the frequency sensitivity modular converter is grouped detection frequency, according to SFOAE in each group
Amplitude, waveform, baseline and the noise of STCs curves carry out Cluster Classification, and according to priori numerical relationship model, obtain specific
Frequency sensitivity numerical value；The test result report generation and preserving module are used to generate and preserve all detection knots of subject
Fruit and test information.
5. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as claimed in claim 4, which is characterized in that described
The specific calculating process of frequency sensitivity modular converter is：According to detection frequency at occur SFOAE STCs curve shapes and
Position is divided into two classes, and the first kind is the SFOAE STCs curves for occurring Double Tops point, and the second class is the SFOAE for occurring single vertex
STCs curves；
For the first kind, the SFOAE STCs curves for Double Tops point occur carry out secondary classification, if vertex is higher than stimulation sound intensity,
High-end slope-c* the low end slopes of frequency sensitivity=a*Q10+b*, if vertex is less than stimulation sound intensity, frequency sensitivity=a*
Q10；
Occur the SFOAE STCs curves on single vertex for the second class, if right avertence is moved, frequency sensitivity=d*Q10+e* is (high-end
Slope-f* low end slopes), if left avertence is moved, frequency sensitivity=g*Q10+h* (high-end slope), if without offset, frequency spirit
Sensitivity=i*Q10, wherein, Q10 refers to the quality factor of 10dB points, according to detected frequency difference, choose different a, b, c,
D, e, f, g and h value.
6. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as described in claim 1, which is characterized in that the inspection
Examining system further includes the pure tone test detection module that resolution ratio is 1dB, and the pure tone test detection module is using subjective behavior side
Method obtains listening threshold value for 1dB in each Frequency point punishment resolution, for being based on SFOAEs intensity sensitivity detection modules with described
Result compared, establish the relationship model of the threshold of audibility of intensity detection and pure tone test based on SFOAEs.
7. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as described in claim 1, which is characterized in that the inspection
Examining system further includes psychological physic tuning curve detection module, and the psychological physic tuning curve detection module is using subjective behavior
Method obtains the frequency sensitivity at assigned frequency point, for the result based on SFOAEs frequency sensitivity detection modules into
Row comparison, by establishing between the frequency sensitivity testing result of the frequency sensitivity testing result and PTCs based on SFOAEs
Relationship model.
8. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as described in claim 1, which is characterized in that the inspection
Examining system further includes preamplifier, and the input terminal of the preamplifier connects the output terminal of the mini microphone, described
The output terminal of preamplifier connects the sound card.
9. the hearing sensitivity detecting system based on frequency of stimulation otoacoustic emission as claimed in claim 7, which is characterized in that the inspection
Examining system further includes signal feedback device, and the signal feedback device connects the computer, and it is anti-to carry out signal for subject
It presents and the feedback result of subject is sent to the computer；The signal feedback device uses handle, and the handle passes through
USB interface connects the computer.
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