KR20020019839A - Apparatus for testing and training of hearing ability - Google Patents

Abstract

PURPOSE: An apparatus for testing and training a hearing ability is provided to improve the testing method of the hearing ability by using testing and training programs executed on a computer. CONSTITUTION: A digital/analog converter(23) is connected to a main computer(1). A speaker is connected to the digital/analog converter(23). An output unit is connected to the main computer(1). An input unit(2) is connected to the main computer(2). The main computer(1) comprises a processor and a storing unit. A program for operating the processor is stored in the storing unit. The main computer(1) is comprised of an acoustic wave generating unit(21) for generating sounds, an acoustic wave control unit(22) for processing and transforming the acoustic wave generated in the acoustic wave generating unit(21), a data input unit(24) for inputting a signal from the input unit(2) to the computer(1), and a result processing unit(25) for processing data from the data input unit(24).

Description

Hearing test and training device {APPARATUS FOR TESTING AND TRAINING OF HEARING ABILITY}

TECHNICAL FIELD The present invention relates to hearing test and training devices (hereinafter referred to as "hearing training devices"), and more particularly, to a device for evaluating and training a hearing ability of a human ear.

The sound is generated by various factors, but as a result of the vibration of air, it is called objective sound. The sound heard through the human ear is also called subjective sound. The subjective sound that a person hears through the ear has three main characteristics. This is the loudness (loudness), loudness (pitch, pitch) and timbre (temper, timbre). The magnitude and height of the sound can be compared to the extent, so this is called a quantitative nature, and the tone is called a qualitative property because the degree cannot be quantified.

Sound generally consists of several frequencies. Based on young people, the range of frequencies that humans can hear is 20 to 20000 Hz. The range of frequencies and sound levels that can be heard depends on the individual's ability to listen.

Because of the different listening abilities of individuals, there is a need for a device for evaluating the subjective sound that a person hears through the ear. You also need a device to train it. 1 is a view showing a conventional hearing test apparatus.

As shown, the conventional apparatus 100 generates a center frequency of 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, etc. using the pure sound generator 11 to generate sound through the amplifier 12 to the speaker 13. . Such a conventional device is a simple evaluation device that evaluates the loudness property of the expression 'heard' and 'inaudible'.

These conventional test apparatuses were able to measure only the loudness properties. In the evaluation of other quantitative properties, the sound has been dependent on subjective evaluations such as 'light' and 'heavy'. On the other hand, the conventional test apparatus necessarily required a device called a separate sound wave generator for generating sound.

Accordingly, it is an object of the present invention to provide a hearing training device which is devised to solve various problems of the conventional test method and which is simply composed of a computer and an accessory device attached to the computer main body.

Another object of the present invention is to provide a device capable of testing and training not only the quantitative nature of sound, but also the qualitative property of sound. In addition, it is an object of the present invention to provide an apparatus for evaluating and training yourself or at the same time dozens of evaluators.

Another object of the present invention is to provide a test and training program that is easy to use because the program operates on a computer, and can store and database the results of the test and training.

After all, the ultimate object of the present invention is to establish a method for evaluating hearing through a hearing training device and to objectively quantify the evaluation of hearing.

1 is a block diagram of a conventional hearing test apparatus

2a and 2b is a block diagram of a hearing test and training apparatus according to an embodiment of the present invention

3 is a configuration diagram of a main computer which is a main part of the apparatus shown in FIG.

4 is a screen of an output device showing a user input process;

FIG. 5A is a screen of an output device showing an evaluator input process, and FIG. 5B is a view showing a sheet containing a table illustratively showing criteria for classifying grades.

6 to 8 are diagrams of test sheets containing test contents

9 is a flow chart of the basic test procedure

10 is a screen of the output device of the basic test process

11 is a screen of an output device for test contents

12 is a flowchart of a negative synthesis test procedure

Figure 13 is a screen of the output device of the negative synthesis test process

14 is a flowchart of a negative playback program test procedure

15 is a screen of an output device of a sound playback program test procedure

16 is a screen of the output device of the statistical processing process

17 is a screen for outputting the test result of the evaluator

-Explanation of symbols for the main parts of the drawing-

One ; Host computer 2; Input device 3; amplifier

21; Sound wave generation unit 22; Sound wave control unit 23; Digital / Analog Converter

24; Data input section 25; Result processing unit

In order to achieve the above object, the present invention provides a hearing test and training apparatus. The hearing test and training apparatus of the present invention includes a computer, an analog signal generator, a speaker, and an input / output device. The computer stores test and training programs (software) that operate the CPU according to the program and manage the data on the storage device.

The computer-operated program includes a sound wave generator for generating various pure sound data, a sound wave controller for synthesizing and processing the generated sound, and a signal transmitted from the input device as a result of the evaluator selecting and inputting the input device. The data input section reads from and the result processing section stores and databases the results of tests and training. They are preferably configured to be implemented collectively in one piece of software.

The signal generator includes a digital / analog converter for converting the sound of the digital signal processed by the sound wave controller into an analog signal, an amplifier for amplifying the analog voltage signal converted from the digital / analog converter at a constant ratio, and an amplified signal. A speaker for output is provided. They may be mounted in the form of a card in the computer, or may be installed as a separate device externally. In a preferred embodiment, the digital / analog converter is built in and the amplifier is installed as an external device.

An output device that outputs a fingerprint presented to the evaluator for evaluation and training (e.g., monitor-in some embodiments, such fingerprint is replaced as a test sheet, and the output device may be for use by the evaluation supervisor). And an input device (for example, a keyboard or a dedicated input device) for inputting a result selected by the evaluator (referring to the evaluator) from the evaluation item presented through the output device based on the sound generated through the speaker. It is provided. It is desirable for the input device to be expandable according to the number of evaluators.

According to one aspect of the invention,

Host computer,

A digital / analog converter connected to the main computer,

A speaker connected to the digital / analog converter,

An output device connected to the main computer,

Is provided with an input device connected to the main computer,

The main computer includes a processor and a storage device, wherein the storage device is stored in a program for operating the processor.

A sound wave generator for generating sound; A sound wave control unit for processing / modifying sound waves generated by the sound wave generator; A data input unit for reading a signal of the input device into a computer; And a CPU for operating the CPU so as to have a configuration including a result processing unit for processing data input from the data input unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2A is an overall configuration diagram of the apparatus, in which necessary parts are mounted in the anechoic chamber, and FIG. 2B is a block diagram again. Fig. 3 is a diagram showing the configuration of a main computer which is a main part of the apparatus.

As shown in Fig. 2, the hearing test and training apparatus 10 is used by the main computer 1, an amplifier 3 for amplifying the generated sound waves, a speaker 4 for outputting the amplified sound waves, and a subject to be tested. An input device 2 and an output device 5 are provided. As shown in Fig. 2A, the input / output device and the speaker are provided in the anechoic chamber 8. Therefore, the evaluator performs the test in the anechoic chamber. Evaluation supervisors may also conduct oversight in the anechoic chamber.

As shown in Fig. 3, the main computer 1 is provided with a sound wave generator 21 and a sound wave controller 22 implemented by software. The signal generated by the sound wave generator 21 (digital data signal for generating a pure tone corresponding to the set frequency and magnitude) is processed by the sound wave controller 22.

The digital / analog converter 23 is incorporated as a card in the main computer 1. The main computer 1 has a data input unit 24 for reading signals transmitted from an external input device 2 and a result processing unit 25 for storing and databaseting the test results.

Although not shown, the computer basically includes a CPU, a memory such as a ROM, a RAM, and a storage device. The storage device stores software (program), and as described below, a database of testers, test results, statistics, and a sound file (for example, a wave file) to be used during the test is also stored.

2 and 3, in the sound wave generator 21 of the main computer 1, digital data for generating a desired pure tone is generated. Pure sound data generated here are processed by the sound wave control unit 22. The processed sound data is converted into an analog signal by the digital / analog converter 23. This analog signal is amplified by a constant voltage signal in the amplifier 3.

The sound wave generation signal passing through the amplifier 3 is output as sound (sound wave) through the speaker 4. On the other hand, in the output device 5 connected to the main computer 1, the evaluators to be evaluated and trained are presented with evaluation items from the main computer 1. These evaluation items (fingerprints) are stored in the storage of the main computer 1, and the test and evaluation software reads them as necessary and presents them to the evaluator through the output device 5. When the evaluator inputs the selected item through the input device 2, the signal is transmitted to the data input unit 24 of the main computer 1.

This process is further explained as follows. Pure sound data generated by the sound wave generator 21 is transformed by the sound wave controller 22 that processes sound such as a digital filter and an octave analysis. The signal calculated in the computer needs a device that converts the analog signal into a human audible signal as a digital signal, which is performed by the digital / analog converter 23.

It is preferable that the data input unit 24 for converting a signal generated through the input device 2 so that the subject of evaluation and training can be recognized by the main computer 1 is configured to process data input by several people at the same time. Do. In addition, the evaluator is input to the input device 2, the hearing test and training device 10 is configured to be able to evaluate and train on their own. The result processor 25 statistically processes the degree of evaluation and training for hearing and quantifies the evaluation of hearing based on the statistical data.

On the other hand, when a wave file is used as a sound source, the program takes the wave file from the storage device and processes the wave file in the sound control unit 22 to output the wave file.

Hereinafter, a process of testing or training with the hearing test and training device 10 according to the present embodiment configured as described above will be described in detail. This process is performed by the software stored in the host computer 1 in order. That is, the hearing evaluation and training apparatus 10 is operated by a program installed in the main computer 1.

Evaluation items can be broadly divided into items evaluating the quantitative properties of sounds and items evaluating the qualitative properties of sounds.

First, there are five items for evaluating the quantitative properties of sounds, and criteria for evaluating each item are determined. Briefly, these are as follows.

1. Items that assess the degree of loudness: (1) An item that evaluates the ability to discern the high and low frequencies for two pure tones being reproduced (pitch evaluation described below), (2) Reference sounds (e.g., 1kHz, 80dB) to classify the high and low frequencies (Ludness evaluation, described below)

2. Items for evaluating the intensity of a note: (1) Items for evaluating the ability to discern the strength of a note against two pure tones being played; (2) For reference sounds (eg, 2 kHz, 80 dB). Item which distinguishes degree of sound intensity

3. Items that distinguish between pure and synthesized sounds: An item that evaluates the ability to distinguish between pure and synthesized sounds for two pure or synthesized sounds that are played (Harmonics evaluation, described below).

4. Ability to discern increased or decreased frequencies (Equalizer evaluation, described below): (1) Ability to discern increased or decreased frequencies in repetitive reproduction of synthesized sounds, and (2) Amplification of increased or decreased frequencies in repetitive reproduction of synthesized sounds. Ability to discern

5. The ability to discern the range of frequencies to which the filter is applied (Filter evaluation, described below): Low pass filter, High pass filter, and Band pass filter in the repeated reproduction of synthesized sound. The ability to discern the frequency with which

In addition, the item evaluating the qualitative quality of the sound is to quantify the degree of the emotional feeling of the recorded or processed sound using adjectives such as 'rough ↔ soft' and 'light ↔ heavy'. (A technique for quantifying the degree of evaluating the qualitative properties of sound has already been known through various academic papers. Any one of such techniques can be used in the present invention.)

The evaluating process will be described in more detail in each step in a format describing the use of software (computer program) mounted on the main computer 1 as follows. The following description describes a program installed in an apparatus of an embodiment of the present invention, and it will be understood by those skilled in the art that the present invention is not limited thereto.

<1. Start of program

Run the program named "Hearing Training Program" in the Windows 98 environment (other embodiments may run under other operating systems).

<2. User Registration>

Click on the New Entry section of the program. Already registered users can go directly to the test area for testing. The input process will be described with reference to FIG. 4 as follows.

2.1. Enter your name in Korean and select your gender. ex) Hong Gil-dong; Gender: Male

2.2. Enter your date of birth. ex) 1970/05/05

2.3. Enter your user ID. The recorded ID is the name of the data file (data file) where the test results are stored. ex) gildong

2.4. Enter the grade or position. ex) 6

2.5. Press the OK button if you entered it correctly, or press the Cancel button to cancel the entry.

<3. Selection of evaluators before testing>

As shown in Fig. 5A, the mobile station moves to the " test " area for ID registration of the person under test.

3.1. Select the number of test subjects to be tested and the class being tested. The tests are conducted in three classes, A, B, and C, depending on the difficulty. The ratings are divided as follows: Grade A: Difficulty level, B Grade: Difficulty level, C grade: Difficulty level. At this time, the rating judgment may use a sheet provided with a rating judgment reference table as shown in Figure 5b.

3.2. Enter the investigator's ID (enter the ID you entered in "User Registration").

3.3. Press the OK button when all the above items are entered and the Cancel button to cancel.

<4. Test>

The tester (also referred to as the evaluator and referring to the person under test) starts the test while sitting on the input device (button set in this embodiment) assigned to him. The test items are 5 items such as Pitch, Loudness, Harmonics, Equalizer, and Filter. The supervisor tests 10 questions for each item. The supervisor will hand out the graded papers and test them step by step. Examples of sheets containing such test items are shown in FIGS. 6 to 8. Different grades give different test questions. Meanwhile, as illustrated in FIG. 9, the test item may be delivered to the tester through the output device.

When testing, it is advisable to complete all five tests in order to see the test results, and to ensure that the test scores of the tester are not calculated unless all five tests are completed.

4.0. Calibration

Before starting the test, first calibrate. In the sound quality evaluation device, the gain may need to be corrected due to the distance difference between the speaker and the tester. The calibration process is as follows.

4.0.1. First, let's play back the set frequency and gain values.

4.0.2. Set the frequency to 1000 Hz and the gain to 80 dB.

4.0.3. The supervisor prepares the indicator sound level meter and moves it to the investigator's ear position. (If three people are tested, move to the middle person's ear position).

4.0.4. Turn on the sound level meter and read the Sound Pressure Level (SPL).

4.0.5. Simply enter the sound level readings in the "Calibration" area of the program.

4.1. Pitch rating

When the calibration is finished, the test begins. The supervisor performs the test from the pitch with reference to the test sheet (Figs. 6 to 8). Among the test items, <No. 1 to 5 are problems for cultivating the ability to discriminate the notes corresponding to high frequencies among two kinds of pure sounds. The examiner hears both types of notes and presses the corresponding number button. Test Item <No. 6 to 10 &gt; are for developing the discriminating ability of frequencies with respect to the reference sound (see Figs. 6, 7, and 8). 9 and 10, an example of evaluation and operation of the pitch is as follows. Fig. 10 shows the supervisor screen shown in the Korean language program. The test is performed by clicking on the item &quot; Basic test " (Pitch and Loudness in the English language program).

4.1.1. Specify the number of times to repeat playback (in the test, set the number of times to repeat). In particular, you can set this section to hear the same notes over and over for training.

4.1.2. Set the time for reproducing the sound (in the program of the present embodiment, the reproducing time is 5 seconds).

4.1.3. Set frequency and gain to play. Set the frequency and gain for the first note you want to play, and set the frequency and gain for the second note (the gain is constant when evaluating pitches). When finished, press the Start button to play the note.

4.1.4. The examiner hears the two types of notes and presses the buttons on the input device of the number corresponding to the correct answer, referring to the test sheet. (Otherwise, the content of the output screen as shown in Fig. 11 can be shown to the tester and inputted.)

4.1.5. The supervisor looks at the test sheet, checks the frequency input in FIG. 10, checks the answer, enters the "Test Answer" item, and presses the OK button. Pressing the OK button will move the number in question to the next number. The supervisor's answer is then compared with the supervisor's answer.

4.1.6. Repeat steps 4.1.3. To 4.1.5 above up to 5 times.

4.1.7. <No. When performing the tests of 6 to 10, the supervisor first informs the examiner of any random note (for example, this time the note to be played is 1000 Hz, 80 dB), plays it, and then presents the output according to the rating. Select from the frequencies of the contents of the device (or the contents of the test sheet) to play again.

4.1.8. Perform the steps 4.1.4. And 4.1.5. Above.

4.1.9. Repeat steps 4.1.7. And 4.1.8. Up to 10 times.

4.1.10. For the evaluation of Loudness, the supervisor moves the button from the Test Answer section to "Loud" in the window provided in FIG.

4.2. Loudness rating

As in the test sheet (see FIGS. 6 to 8), the five items are divided into two parts. If the test is rated A, the <No. 1 to 5 are questions for developing the ability to discern the pure sound having the greatest intensity among two kinds of pure sound. The examiner hears both types of notes and presses the corresponding number button. <No. 6-10, to develop the ability to discern the degree of intensity of a note to a reference sound.

Since the process of 4.1.1., 4.1.2. Has already been set in the Pitch test process, it can be omitted in the Loudness evaluation process.

4.2.1. Set the frequency and gain to play back as in 4.1.3. No. 1 sets the frequency and gain for the first note to be played, and No. 2 sets the frequency and gain for the second note (the frequency is kept constant because it is now an evaluation of the loudness). When finished, press the "Start" button to play the sound.

4.2.2. The examiner hears two types of notes and presses the button corresponding to the correct answer, referring to the test sheet (Figs. 6-8).

4.2.3. The supervisor looks at the test sheet, checks the answers he has set in the "Test Answer" area of Fig. 10, and presses the OK button.

4.2.4. Repeat steps 4.2.1. Through 4.2.3. Up to 5 times.

4.2.5. <No. When performing the tests of 6 to 10, the supervisor first informs the examiner of any random note (for example, this time the note to be played is 1000 Hz, 80 dB), plays it, and then Adjust the gain by the intensity and play again.

4.2.6. Perform the steps 4.2.2. And 4.2.3. Above.

4.2.7. Repeat steps 4.2.5. And 4.2.6. Up to 10 times.

4.3. Evaluation of Harmonics

After completing the basic test (Pitch and Loudness) test, move to the "Synthesis of sound" test ("Harmonics") in the program. As shown in the test sheet of Figs. 6, 7, and 8, five items are divided into two parts. <No. 1 to 5 are problems for developing the ability to distinguish between pure and synthesized sounds in the reproduction of two kinds of pure or synthesized sounds. <No. 6 to 10 are intended to develop the ability to discern the degree of loudness relative to the reference sound. Referring to the flowchart of FIG. 12 and the test setting screen of FIG. 13, the process is as follows. In the Hangul program of Fig. 13, a negative synthesis item is clicked and tested.

4.3.1. Specifies the number of times to play repeatedly.

4.3.2. Set the time to play the sound.

4.3.3. <No. In tests 1 to 5, the supervisor sets the frequency and gain for the two types of notes (pure or synthesized) to be played in any order. In Fig. 13 1, No. There are three edit boxes under 2. Here, the frequency of the pure tone constituting the synthesized sound to be reproduced is entered, and the gain is entered in the last edit box. Referring to Fig. 13, the first reproduced sound is a synthesized sound of 500Hz and 1000Hz, the second reproduced sound is a synthesized sound of 2000Hz and 3000Hz, and both gains are set to 80dB.

4.3.4. When finished, click the Start button to play the note. Fig. 13 shows the "time domain" and "frequency domain" when sound is reproduced in Harmonics.

For training purposes other than tests, the user can arbitrarily reproduce pure or synthesized sounds. Synthetic sounds for three pure tones can also be reproduced (when the check box shown in Fig. 13 is activated). That is, the pure sound, the double synthesized sound, and the triple synthesized sound can be reproduced. In the figure, the frequency is set to reproduce synthesized sounds of 1000Hz, 1010Hz, and 1020Hz.

4.3.5. The examiner listens to the two types of notes and consults the test sheet and presses the button corresponding to the correct answer.

4.3.6. The supervisor looks at the test sheet, checks his answer in the test answer area, and presses the OK button.

4.3.7. Repeat steps 4.3.3. Through 4.3.6. Up to 5 times.

4.3.8. <No. In the tests of 6 to 10, the supervisor first informs the tester of the arbitrary synthesized sound (for example, the sound to be played this time is 3000Hz, 60dB and 5000Hz, 60dB). Play again by adjusting the gain to the intensity of the sound indicated on the test sheet.

4.3.9. Execute the procedure of 4.3.5., 4.3.6. Above.

4.3.10. Repeat steps 4.3.8. And 4.3.9. Up to 10 times.

4.4. Equalizer's rating

Referring to Fig. 15, after testing 10 items of the item "Harmonics", it moves to the "Equalize and Filter" portion on the program screen. This section displays the data in a wave file and plays or edits the sound. Referring to Fig. 15, the supervisor moves the radio button to the section marked "Equal" in "Test Answer". The test sheet is divided into four, three, and three questions to assess the ability to discern the increased or decreased frequencies in the low, medium, and high frequencies, respectively. The process illustrated in FIG. 14 and the contents illustrated in FIG. 15 will be described below.

4.4.1. Set the playing time of the sound.

4.4.2. Depending on the type of test sheet, select 1/1 (Octave freq.) Or 1/3 octave frequency in the `` Control Setting '' section. .

4.4.3. Recall and play an arbitrary wave file to play.

4.4.4. View the test sheet and increase or decrease the appropriate frequency in the Filter / Equalizing section, press the Apply button, and play again.

On the other hand, the reproduction of sound may be arbitrarily selected and only a part thereof may be played or edited. When you first load an arbitrary wave file, the data of the wave file appears in the time domain. Wave files are largely divided into 8bit and 16bit, which in turn have a mono or stereo format. Mono has data for each space (8bit or 16bit size). Thus, even in a stereo system, each speaker will sound the same. In contrast, the Stereo format can output different sounds for each speaker. Wave data is represented by one line of Mono and two lines of stereo format in the time domain.

In addition, it is possible to enlarge or reduce part of the imported data. Use the mouse to select the part you want to enlarge and press the + button to enlarge it. When zooming out, simply press the-button. When part of the data is zoomed in, you can see the wave's waveform in more detail or use scrolling. In addition, partial playback and editing are possible. If you select the part you want to play using the mouse and press the play button, only the part selected with the mouse is played and edited.

There are three types of spectrum shown in the frequency domain section.

① Method to show the wave waveform flow in the time domain

② Displaying Frequency and Gain in Bar Graph

③ Method to express gain intensity in color

In addition, a menu is displayed when the right mouse button is pressed in the frequency domain portion. You can select the type of spectrum from the menu and get information about the wave file currently displayed on the screen.

In FIG. 15, the upper part shows the waveform of the wave file in the time domain and the lower part shows the frequency and the gain in bar graph format.

4.5. Evaluation of Filter

After testing 10 items of the Equalizer, the supervisor checks the section marked "Filt." In the Test Answer section in FIG. In the test sheet, 10 questions are divided into 4, 3, and 3 questions, which evaluate the ability to discriminate the frequencies to which the low pass filter, the high pass filter, and the bandpass filter are applied.

4.5.1. Sets the playing time of the sound.

4.5.2. Select Filtering in the Control Setting section.

4.5.3. Recall and play an arbitrary wave file to play.

4.5.4. After viewing the test sheet, input the appropriate frequency in the 『Filter / Equalizing』 part (this part is a screen for selecting one of the low pass filter, high pass filter, and band pass filter, unlike in FIG. 15). Filter is applied by pressing the corresponding button among Filters of. After filtering, play again.

4.5.5. The examiner listens to the two types of notes and consults the test sheet and presses the button corresponding to the correct answer.

4.5.6. The supervisor looks at the test sheet, checks his answer in the Test Answer area, and clicks the OK button.

4.5.7. Repeat steps 4.5.3. To 4.5.6. Up to 10 times.

<5. Statistics>

After the test is finished, go to the program's statistics (in English, Statistics) to see your results. Here, as shown in FIG. 16, the mouse is positioned on the part of the examiner's name and the button is pressed in order to view the result of the personal information such as the examiner's name and gender. In order to view the grades, the results (in the English program) move to the Result area, as shown in Figure 17, the scores according to the number of tests of the examiner will appear.

<6. Result>

To immediately check the tester's grades, the tester's ID may be input in the User ID field in the "Result" area as shown in FIG.

In the above embodiment, the tester and the supervisor are shown to perform the test together. Alternatively, each of the above tests may be performed in a batch. There is no need for a separate supervisor.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and variations can be made without departing from the spirit and scope of the present invention and that such modifications and variations also fall within the present invention.

According to the above-described configuration of the present invention, a digital / analog converter or an amplifier is installed inside the computer, and the input / output device can also be controlled by a computer so that the device can be implemented without additional measurement equipment. In addition, since the device operates on a computer, the operation is simple and easy to use. In addition, through the present invention, it is possible to establish a method for evaluating hearing and to quantify it by objectively evaluating hearing. Since the computer uses the software to generate the sound for the test item, various test items can be created and executed. The device of the present invention can be used not only for testing but also for training hearing.

Claims (1)

Host computer, A digital / analog converter connected to the main computer, A speaker connected to the digital / analog converter, An output device connected to the main computer, Is provided with an input device connected to the main computer, The main computer includes a processor and a storage device, wherein the storage device is stored in a program for operating the processor. A sound wave generator for generating sound; A sound wave control unit for processing / modifying sound waves generated by the sound wave generator; A data input unit for reading a signal of the input device into a computer; And a CPU configured to operate the CPU to include a result processing unit processing the data input from the data input unit.