CN103099625A - Test method and system for auditory time modulation transfer function - Google Patents
Test method and system for auditory time modulation transfer function Download PDFInfo
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Abstract
The invention provides a test method and a test system for an auditory time modulation transfer function. The test system is used for testing detection capability of human ears for auditory time modulation. The test system comprises an auditory time modulation transfer function test system. The subsystem further comprises a user management module, a parameter configuration module, a loudness regulation module, a formal testing module, and a result generation module, wherein the user management module is used for inputting and storing basic information of a testee, the parameter configuration module is used for selecting and disposing testing parameters and achieving parameter configuration by using two methods of field configuration and directly importing prepared parameter configuration files, the loudness regulation module is used for regulating reference signals, calibrating a sound field by using a sound level meter, and guaranteeing that the sound pressure level of the reference signals meets the calibration standard, the formal testing module is used for conducting self-adaption tests based a two-optional forced choice method and calculating modulation depth which can be recognized by the testee in a minimum degree with different modulation frequencies, and the result generation module is used for collecting test information and test data, and generating appraisal curve results.
Description
Technical field
The present invention relates to the psychoacoustics field, a kind of method of testing of audition temporal modulation transfer function has been proposed, be used for the time-amplitude modulation perception studies to human auditory system, applicable object is normal good hearing person and the user of wearing the hearing-aid devices such as sonifer, artificial cochlea, is specifically related to a kind of method of testing and system of audition temporal modulation transfer function.
Background technology
All sound can be regarded time dependent one-dimensional signal as, so temporal information is extremely important for auditory system.No matter be voice or music, all sound with effective information are all that the time domain that information exchange is crossed signal is changed to embody.Explain peripheral auditory system although comprise the different theory such as time theory, situation theory, theory of travelling wave and theory in theory of hearing from various angles, if but from psychoacoustic angle, the auditory system of people's ear were regarded as black box, the input signal of black box all can be regarded as the time dependent one dimension variation of sound pressure signal so.
In the time response of audition, two important concepts are arranged: one is that time domain is differentiated (Temporal Resolution), and another is that time domain is integrated (Temporal Integration).Both all are the time domain power of test of people's ear, but time span is different, time domain differentiate for stimulus signal shorter.In addition, time domain differentiate usually for be temporal envelope variation resolution and not for fine structure [1], this point can too not mentioned in the present invention, if because only consider from the angle of amplitude modulation(PAM), the excursion of modulating frequency is very large, is not subjected to the frequency limitation of envelope or fine structure.
Audition temporal modulation transfer function (Temporal Modulation Transfer Function, TMTF) is the relation function [1] of modulation detection threshold value and the modulating frequency of audition, and it is a kind of that TMTF commonly uses when being the resolution of research audition time domain.TMTF research carrier signal commonly used is broadband noise signal, narrowband noise signals or sinusoidal signal, wherein noise use more, the embodiment part will the present invention will be described as example with the sinusoidal signal carrier wave.
Audition TMTF research not only is applicable to normal good hearing person, and the person that is applicable to the impaired hearing or the audition disability patient that wears hearing-aid device, is used for the time domain resolution characteristic of test person ear or artificial ear.Experiment support can be provided for the auditory system of probing into people's ear or artificial ear.
The research of audition TMTF has had some researchs abroad, as test event commonly used in psychoacoustics research, to exploring the audition time domain specification, important scientific research value is arranged, for Cognitive Science, auditory nerve science and brain science research, important reference value is arranged.Scientific and effective psychological physic testing process and research method help to provide reliable psychophysical testing data for the research of further acoustic nerve and auditory center.Usually adopt auditory filter that audition TMTF is made an explanation, although the pumping signal of TMTF test is the sine amplitude modulation signal, signal form is comparatively simple, it is varied that but the form of carrier wave is selected, the frequency of carrier wave and amplitude modulation(PAM) the frequency even wave form of amplitude modulation(PAM) are all also that endless selection is arranged, and carry out widely the space therefore the psychoacoustics experimentation of TMTF has.Utilize different parameter combinations to carry out the favourable promotion people of the research association of TMTF to human auditory system's understanding by different research worker.
According to the domestic correlational study that there is no known to the author, the present invention is with reference to external correlational study document, and the test macro of the audition temporal modulation transfer function that independent development one cover science is complete is for carrying out of the research provides the psychophysical testing design basis.
Summary of the invention
The object of the invention is to, a kind of method of testing and system of audition temporal modulation transfer function are provided, be used for the test person ear to the power of test of audition time-modulation, for the time-modulation amplitude perception studies of human auditory system provides a complete psychological physic testing process of cover, namely provide a kind of method of testing and system of audition temporal modulation transfer function.
To achieve these goals, the invention provides a kind of test macro of audition temporal modulation transfer function, this system is used for the test person ear to the power of test of audition time-modulation, described system comprises external sound card and loudspeaker special and earphone, it is characterized in that, described system also comprises: audition temporal modulation transfer function test macro, and this subsystem further comprises:
User management module is used for typing and storage subjects's essential information, and described essential information comprises: the information such as No. ID, name, sex, age, phone, mailbox;
Parameter configuration module is used for selecting and the configuration testing parameter, and can take situ configuration and directly import off-the-shelf parameter configuration files dual mode;
The loudness adjustment module is used for reference signal is regulated, and utilizes sound meter that sound field is calibrated, and guarantees that its sound pressure level reaches calibration criterion;
The official testing module adopts two options to force selections (2AFC) method to carry out adaptive testing, and the distinguishable modulation depth that goes out of subjects's minimum when calculating the different modulating frequency; With
Result-generation module is used for collecting all detecting informations and test data, generates final testing evaluation curve and result.
In technique scheme, described test parameter comprises: TCH test channel, sound stimulate loudness, modulating frequency and/or stimulate duration.
Described official testing module comprises: the method for testing that the selection mode of sound stimulus signal and two options force selection is used for signal, the form of expression and the method for testing of determining that test is adopted;
Wherein, described sound stimulus signal comprises: reference signal, modulation signal and contrast signal, described reference signal are carrier signal, and described modulation signal is the test main signal, and described contrast signal is used signal for obscuring; Contrast signal obtains to identical with the modulation signal energy with reference to signal normalization; What described two options forced system of selection is: the subjects can hear 3 sound stimulus signals at every turn, the 2nd broadcast of described reference signal, described modulation signal and contrast signal occur at random the 1st and 3 play position respectively, the subjects from the 1st with the 3rd sound stimulus signal select with reference signal and compare larger one of difference.
Described official testing module also adopts the adaptive testing algorithm to test, and this algorithm is specially:
Described result-generation module obtains respectively user profile, test parameter, test process and result of calculation from user management module, parameter configuration module and official testing module, and generates final test result and audition time-modulation sensitivity curve.
Based on said system, the present invention also provides a kind of method of testing of audition temporal modulation transfer function, and the method is used for the test person ear to the power of test of audition time-modulation, and described method comprises following steps:
Above-mentioned method is based on the essential information of subjects's typing and storage.
Described test parameter comprises: TCH test channel, sound stimulate loudness, modulating frequency and/or stimulate duration.
Described step 3 comprises: the method for testing that the selection mode of sound stimulus signal and two options force selection is used for signal, the form of expression and the method for testing of determining that test is adopted; Wherein, described sound stimulus signal comprises: reference signal, modulation signal and contrast signal, described reference signal are carrier signal, and described modulation signal is the test main signal, and described contrast signal is used signal for obscuring; Contrast signal obtains to identical with the modulation signal energy with reference to signal normalization; What described two options forced system of selection is: the subjects can hear 3 sound stimulus signals at every turn, the 2nd broadcast of described reference signal, described modulation signal and contrast signal occur at random the 1st and 3 play position respectively, the subjects from the 1st with the 3rd sound stimulus signal select with reference signal and compare larger one of difference.
Described step 3 also adopts the adaptive testing algorithm to test, and this algorithm is specially: step 1, and the step of definition initial parameter: step-length is defined as that { 6,2,2,1,1,1,1,1,1,1,1,1,1} (dB), initial step length are 6; All be defined as a flex point from " answering questions mistake " or " answering wrong to answering questions ", a flex point occurs, current step-size change is next step long value; The initial modulation degree of depth can be set to the arbitrary value of 50% to 100%; Step 2 adopts the adaptive approach of " 2down-1up ", namely answers questions continuously 2 and inscribes that modulation depth reduces, and the computing formula that reduces institute's foundation is: 20lg (amd
new/ amd
old)=step, wherein, amd
newBe new modulation depth, amd
oldBe current modulation depth, step is current step-length, answers wrong 1 and inscribes modulation depth increase, and the computing formula that increases institute's foundation is: 20lg (amd
new/ amd
oldThe step of)=-; Step 3, the step of statistical result, the exercise question of each modulating frequency is the modulation depth at last 8 the flex point places of statistics, and asks for itself and average, the minimum distinguishable modulation depth that goes out of subjects when obtaining this modulating frequency.
Described step 4 is obtained user profile, test parameter, test process and result of calculation from step 1, step 2 and step 3, and generates final test result and audition time-modulation sensitivity curve.
Compared with prior art, technical advantage of the present invention is:
In 1 the present invention, the loudness adjustment module has been considered the perceived loudness different situation of people's ear to the identical different frequency signals of amplitude, can effectively calibrate signal.
In 2 the present invention, the official testing module adopts each exercise question to comprise three sound, two options and the mode of forcing selection, and modulation depth is adjusted the method for step-length according to self adaptation, has guaranteed that measurement result is effective fast.
Contrast signal in 3 the present invention in three of each exercise question of official testing module stimulus signals obtains to identical with the modulation signal energy with reference to signal normalization, thereby utilizes loudness differences information rather than modulation intelligence to obtain modulation and the difference sense of not modulating when having avoided the subjects to select exercise question.
4 the present invention can carry out the test of complete audition temporal modulation transfer function, are not only applicable to normal good hearing person, the person that also is applicable to the impaired hearing or the person that wears the hearing-aid device.
Description of drawings
Fig. 1 is the method for testing flow chart of audition temporal modulation transfer function of the present invention;
Fig. 2 is the adaptive testing algorithm block diagram of official testing module of the present invention;
Fig. 3 is the test macro block diagram of audition temporal modulation transfer function of the present invention;
Fig. 4 is audition temporal modulation transfer function of the present invention testing software functional block diagram;
Fig. 5-a is the sound stimulus signal illustration in the test of the invention process example;
Fig. 5-b is the sound stimulus signal illustration in the test of the invention process example;
Fig. 5-c is the sound stimulus signal illustration in the test of the invention process example;
Fig. 6 is the audition time-modulation sensitivity curve of the invention process example test.
The specific embodiment
For feasibility and the effectiveness of verifying the inventive method, the author has developed a cover software platform according to the method flow that the present invention proposes.At present, adopt this software platform to complete the normal good hearing people and test 22 examples, the invention will be further described below in conjunction with drawings and the specific embodiments.
As shown in Figure 2 be the adaptive testing algorithm block diagram of the official testing module of audition temporal modulation transfer function method of testing of the present invention, at first initialize required parameter, as: step-length, modulation depth, topic number, flex point number etc., secondly calculate and process the variation of modulation depth according to the adaptive approach of " 2down-1up ", the meansigma methods of the modulation depth at last 8 flex point places is tested and is counted in one group of end when 12 flex points occurring at last.
As shown in Figure 3 be the block diagram of the test macro of audition temporal modulation transfer function of the present invention, mainly comprise: operate in the audition time transfer function testing software on PC, special-purpose external sound card, loudspeaker special or earphone and subjects.
the functional block diagram for the software platform of the author exploitation as shown in Figure 4, whole software is take the method for testing of audition temporal modulation transfer function of the present invention as theoretical foundation and guiding theory realizes, mainly comprise: user management, parameter configuration, loudness is regulated, four functional modules of official testing, subscriber management function module wherein relates to the data interaction with audition temporal modulation transfer function experiment subjects basic information database, the official testing functional module relates to the data interaction with audition temporal modulation transfer function experimental result data and process record file.
Before beginning audition temporal modulation transfer function test experiments of the present invention, at first every subjects must carry out audiometery, and need to guarantee its left and right ear threshold of audibility all less than 25dBHL, otherwise can not carry out audition temporal modulation transfer function experiment of the present invention.
Be illustrated in figure 1 as audition temporal modulation transfer function method of testing flow chart of the present invention, at first enter user management module, the subjects completes the typing of essential information under tester's guidance, comprising: the essential informations such as name, sex, age, phone, mailbox; Enter afterwards parameter configuration module, the tester imports prior off-the-shelf parameter configuration files, configures the information such as TCH test channel, sound stimulation loudness, modulating frequency, stimulation duration, and the parameter list that example is selected is as shown in table 1:
Table 1 sound stimulus parameter is selected
Then enter the loudness adjustment module loudness size that sound stimulates is regulated, utilize sound meter to regulate, make the loudness size of sound stimulation between 65～70dBA, table 2 stimulates loudness for the sound after regulating:
In table 2 test, sound stimulates loudness value
| TCH test channel | Sound stimulates |
| 3 | 168 |
Entering afterwards the official testing module tests, through random, modulating frequency in test is sequentially: 40Hz, 50Hz, 20Hz, 10Hz, 60Hz, 30Hz, be divided into 6 groups of tests according to the different whole test of above-mentioned modulating frequency, the initial modulation degree of depth of every group of test is 80%, and whole test process adopts described " 2down-1up " adaptive approach (as shown in Figure 2) to carry out, and 12 flex points appear in every group of test, this group test finishes, and enters next group test.The sound stimulus signal persistent period in test is 500ms, and the interval between two sound stimulus signals is 500ms.During different modulating frequency that the official testing module finally obtains, the minimum distinguishable modulation depth that goes out of subjects is as follows:
Table 3 test result
| Minimum distinguishable modulation depth | 40Hz | 50Hz | 20Hz | | 60Hz | 30Hz | |
| 3 | 0.03347 | 0.05565 | 0.05623 | 0.05980 | 0.01354 | 0.05098 |
Test result in result-generation module associative list 3 obtains final test result, utilizes " 20lg (minimum distinguishable modulation depth) " to calculate and draw out the audition time-modulation sensitivity curve as shown in Fig. 5-a, 5-b and 5-c.Test result shows that this subjects's audition time-modulation sensitivity is good.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although with reference to embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is modified or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. the test macro of an audition temporal modulation transfer function, this system is used for the test person ear to the power of test of audition time-modulation, described system comprises external sound card and loudspeaker special or earphone, it is characterized in that, described system also comprises: audition temporal modulation transfer function test macro, and this subsystem further comprises:
User management module is used for typing and the essential information of storing the subjects;
Parameter configuration module is used for selecting and the configuration testing parameter, and can take situ configuration and directly import off-the-shelf parameter configuration files dual mode to realize parameter configuration;
The loudness adjustment module is used for reference signal is regulated, and utilizes sound meter that sound field is calibrated, and guarantees that its sound pressure level reaches calibration criterion;
The official testing module adopts and to carry out adaptive testing based on the system of selection that forces of two options, and the minimum distinguishable modulation depth that goes out of subjects when calculating the different modulating frequency; With
Result-generation module is used for collecting all detecting informations and test data, generates final testing evaluation curve and result.
2. the test macro of audition temporal modulation transfer function according to claim 1, is characterized in that, described test parameter comprises: TCH test channel, sound stimulate loudness, modulating frequency and/or stimulate duration.
3. the test macro of audition temporal modulation transfer function according to claim 1, it is characterized in that, described official testing module comprises: the method for testing that the selection mode of sound stimulus signal and two options force selection is used for signal, the form of expression and the method for testing of determining that test is adopted;
Wherein, described sound stimulus signal comprises: reference signal, modulation signal and contrast signal, described reference signal is carrier signal, described modulation signal is the test main signal, described contrast signal is used signal for obscuring, and contrast signal obtains to identical with the modulation signal energy with reference to signal normalization;
Described two options force system of selection to be: the subjects can hear 3 sound stimulus signals at every turn, the 2nd broadcast of described reference signal, described modulation signal and contrast signal occur at random the 1st and 3 play position respectively, the subjects from the 1st with the 3rd sound stimulus signal select with reference signal and compare larger one of difference.
4. the test macro of audition temporal modulation transfer function according to claim 1, it is characterized in that, described official testing module also adopts the adaptive testing algorithm to test, and the mode that modulation depth is adjusted step-length according to self adaptation changes, and this algorithm is specially:
Step 1, the step of definition initial parameter: step-length is defined as that { 6,2,2,1,1,1,1,1,1,1,1,1,1} (dB), initial step length are 6; All be defined as a flex point from " answering questions mistake " or " answering wrong to answering questions ", a flex point occurs, current step-size change is next step long value; The initial modulation degree of depth can be set to the arbitrary value of 50% to 100%;
Step 2 adopts the adaptive approach of " 2down-1up ", namely answers questions continuously 2 and inscribes that modulation depth reduces, and the computing formula that reduces institute's foundation is: 201g (amd
new/ amd
old)=step, wherein, amd
newBe new modulation depth, amd
oldBe current modulation depth, step is current step-length, answers wrong 1 and inscribes modulation depth increase, and the computing formula that increases institute's foundation is: 20lg (amd
new/ amd
oldThe step of)=-;
Step 3, the step of statistical result, the exercise question of each modulating frequency is the modulation depth at last 8 the flex point places of statistics, and asks for itself and average, the minimum distinguishable modulation depth that goes out of subjects when obtaining this modulating frequency.
5. the test macro of audition temporal modulation transfer function according to claim 1, it is characterized in that, described result-generation module obtains respectively user profile, test parameter, test process and result of calculation from user management module, parameter configuration module and official testing module, and generates final test result and audition time-modulation sensitivity curve.
6. the method for testing of an audition temporal modulation transfer function, the method are used for the test person ear to the power of test of audition time-modulation, and described method comprises following steps:
Step 1 is used for selecting and the configuration testing parameter, and can take situ configuration and directly import off-the-shelf parameter configuration files dual mode to realize parameter configuration;
Step 2 is used for reference signal is regulated, and utilizes sound meter that sound field is calibrated, and guarantees that its sound pressure level reaches calibration criterion;
Step 3 adopts two options to force system of selection to carry out adaptive testing, and the minimum distinguishable modulation depth that goes out of subjects when calculating the different modulating frequency;
Step 4 is used for collecting all detecting informations and test data, generates final testing evaluation curve and result;
Wherein, described method is also based on the subjects's who is used for typing and storage essential information.
7. the method for testing of audition temporal modulation transfer function according to claim 6, is characterized in that, described test parameter comprises: TCH test channel, sound stimulate loudness, modulating frequency and/or stimulate duration.
8. the method for testing of audition temporal modulation transfer function according to claim 6, it is characterized in that, described step 3 comprises: the method for testing that the selection mode of sound stimulus signal and two options force selection is used for signal, the form of expression and the method for testing of determining that test is adopted;
Wherein, described sound stimulus signal comprises: reference signal, modulation signal and contrast signal, described reference signal are carrier signal, and described modulation signal is the test main signal, and described contrast signal is used signal for obscuring; Contrast signal obtains to identical with the modulation signal energy with reference to signal normalization;
What described two options forced system of selection is: the subjects can hear 3 sound stimulus signals at every turn, the 2nd broadcast of described reference signal, described modulation signal and contrast signal occur at random the 1st and 3 play position respectively, the subjects from the 1st with the 3rd sound stimulus signal select with reference signal and compare larger one of difference.
9. the method for testing of according to claim 6 or 8 described audition temporal modulation transfer functions, it is characterized in that, described step 3 also adopts the adaptive testing algorithm to test, and the mode that modulation depth is adjusted step-length according to self adaptation changes, and this algorithm is specially:
Step 1, the step of definition initial parameter: step-length is defined as that { 6,2,2,1,1,1,1,1,1,1,1,1,1} (dB), initial step length are 6; All be defined as a flex point from " answering questions mistake " or " answering wrong to answering questions ", a flex point occurs, current step-size change is next step long value; The initial modulation degree of depth can be set to the arbitrary value of 50% to 100%;
Step 2 adopts the adaptive approach of " 2down-1up ", namely answers questions continuously 2 and inscribes that modulation depth reduces, and the computing formula that reduces institute's foundation is: 20lg (amd
new/ amd
old)=step, wherein, amd
newBe new modulation depth, amd
oldBe current modulation depth, step is current step-length, answers wrong 1 and inscribes modulation depth increase, and the computing formula that increases institute's foundation is: 20lg (amd
new/ amd
oldThe step of)=-;
Step 3, the step of statistical result, the exercise question of each modulating frequency is the modulation depth at last 8 the flex point places of statistics, and asks for itself and average, the minimum distinguishable modulation depth that goes out of subjects when obtaining this modulating frequency.
10. the method for testing of audition temporal modulation transfer function according to claim 6, it is characterized in that, described all detecting informations of step 4 and test data comprise: subjects's essential information, test parameter, test process and result of calculation, and generate final test result and audition time-modulation sensitivity curve.
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| CN106073797A (en) * | 2016-06-15 | 2016-11-09 | 佛山博智医疗科技有限公司 | Test speech length gives method for acoustic automatically |
| CN106725515A (en) * | 2015-11-25 | 2017-05-31 | 中国科学院声学研究所 | A kind of quick universal newborn hearing screening assessment system |
| CN107049333A (en) * | 2017-06-15 | 2017-08-18 | 佛山博智医疗科技有限公司 | Auditory identification susceptibility test method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104856784A (en) * | 2015-03-26 | 2015-08-26 | 深圳大学 | Electrical auditory prosthesis single processing method and system |
| CN105078473A (en) * | 2015-07-31 | 2015-11-25 | 深圳市冠旭电子有限公司 | Listening test method and device |
| CN105078473B (en) * | 2015-07-31 | 2018-02-23 | 深圳市冠旭电子股份有限公司 | Listening checking method and device |
| CN106725515A (en) * | 2015-11-25 | 2017-05-31 | 中国科学院声学研究所 | A kind of quick universal newborn hearing screening assessment system |
| CN106073797A (en) * | 2016-06-15 | 2016-11-09 | 佛山博智医疗科技有限公司 | Test speech length gives method for acoustic automatically |
| CN107049333A (en) * | 2017-06-15 | 2017-08-18 | 佛山博智医疗科技有限公司 | Auditory identification susceptibility test method |
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