JP2528890B2 - Vocal training machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for vowel vocalization training by a speech-impaired person with a speech disability.

[Prior Art] A conventional vocal training machine detects a vocal sound produced by a trainee by a voice detection means such as a microphone, and detects the detected voice signal in a first formant and a second formant by an extraction unit of a control circuit. While processing the extracted first formant on the horizontal axis of the display means such as a monitor display and the second formant on the vertical axis of the display means,
It was visually displayed to the trainee using the display means.

[Problems to be Solved by the Invention] However, in the above-described conventional technique, the trainee approaches the target vocal sound by changing his or her vocal sound from the screen displayed on the display means. I don't know what. Therefore, it takes a long time for training, and
There was a problem that the trainees lost their willingness to train along the way.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vocal training apparatus that allows a trainee to easily bring a vocal sound produced by himself to a target vocal sound. is there.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention uses a detecting means for detecting a voiced sound of a trainee as a voice signal, and a first formant and a voice signal detected by the detecting means. In a vocal training apparatus comprising a control circuit having an extraction unit for extracting the second formant and a display means for visually displaying output information of the control circuit to a trainee, the control circuit has a model pronunciation " Displaying "i", "a", and "o" with the first formant on the horizontal axis and the second formant on the vertical axis, the display position of the model pronunciation "i" and the display of the model pronunciation "a" The position and the position between the "O" display positions are connected by a straight line, and the first formant extracted by the extraction unit is represented on the horizontal axis and the second formant is represented on the vertical axis by reversing about the straight line. Display on the display means That is the technical means.

[Operation] According to the present invention having the above-described configuration, the extraction unit extracts the first formant and the second formant from the voice signal input by the detection unit, and the control circuit sets the frequency of the first formant on the horizontal axis to the second formant. When the formant frequency is represented on the vertical axis and displayed on the display means, the utterance sound uttered by the trainee is displayed at the display position of the model pronunciation “I”, the display position of the model pronunciation “A”, and the “O”. The line connecting the positions between the display positions is reversed and displayed.

On the other hand, the first formant is represented on the horizontal axis and the second formant is represented on the vertical axis, and between the display position of the model pronunciation “i” and the display position of the model pronunciation “a” and the “o”. The position of the uttered sound displayed on the display means corresponds to the position of the tongue when the uttered sound is uttered by reversing and displaying the line connecting the position and the center.

This allows the trainee to know what voicing sound was uttered by the position on the display means at which the voicing sound uttered by him was expressed, and the position of the utterance sound uttered by the trainee. , From the target vocalization position,
The trainee can determine in which direction the position of the tongue should be moved to produce a voice to approach the target vocalization sound.

EFFECTS OF THE INVENTION According to the present invention, the utterance sound uttered by the trainee and the position of the tongue can be known from the position of the utterance sound of the trainee displayed on the display unit, and the position of the tongue can be known. It is possible to easily determine in which direction the voice is moved to approach the target vocal sound. Therefore, the trainee
It is possible for one person to easily bring the uttered sound produced by himself close to the target uttered sound.

[Embodiment] Next, a vocal training machine of the present invention will be described based on an embodiment shown in the drawings.

 FIG. 1 shows a block diagram of a vocal training machine.

The voicing training machine 10 is a microphone 20, which is a detection means of the present invention for detecting a voicing sound of a trainee as a voice signal, a control circuit for electrically processing the signal of the microphone 20 and outputting the processed signal. 30 and a color monitor television 40 which is the display means of the present invention for displaying the output information of the control circuit 30 to the trainee.

The control circuit 30 uses a low-pass filter 31 that cuts high frequencies among the frequency components of the audio signal from the audio signal detected by the microphone 20, and a high-frequency cut analog audio signal that is output by the low-pass filter 31 as a digital signal. An analog / digital conversion unit (hereinafter A /
D converter) 32 and read-only memory (ROM)
33, central processing unit (hereinafter CPU) 35 equipped with random access memory (RAM) 34, and data transfer to RAM 34 and CPU 35, and the voice signal produced by the trainee from the digital signal input to CPU 35. The first formant of voice,
And a digital signal processing (hereinafter referred to as DSP) 36 for extracting the second formant, and a graphic processing 37 for displaying the calculation result of the CPU 35 on the color monitor television 40. Note that the RAM 34, the CPU 35, and the DSP 36 constitute the extraction unit of the present invention.

The ROM 33 is a cartridge type that can be replaced according to the age, gender, purpose of use, etc. of the user. The ROM 33 contains the first formant and the second formant extracted by the DSP 36.
As shown in FIG. 2, the formants are represented by the horizontal axis representing the first formant and the vertical axis representing the second formant, and the display position of the model pronunciation “I” and the model pronunciation “A” are shown.
For reversing the line connecting the display position of "" and the position between the display positions of "O" (shown by the broken line A in FIG. 2) to the color monitor TV 40 as shown in FIG. Have a function.

Thus, for example, if the five vowels in Japanese are represented by the first formant on the horizontal axis and the second formant on the vertical axis, as shown in FIG.
By using the present invention, the five vowels shown in FIG. 2 are inverted about the broken line A and displayed on the color monitor TV 40 by using the present invention. . The model vocalizations shown here are according to the age of the trainee and gender.

 Next, the operation of the above embodiment will be described.

In this embodiment, the case where the trainee practices the pronunciation of "U" will be described.

The vocal trainer turns on the power source of the vocal training machine 10, not shown.
When turned on, the trainee heads into the microphone 20 to practice "u" vocalization.

The voice signal received by the microphone 20 passes through the low-pass filter 31 of the control circuit 30, the high frequency component is cut, and the signal is digitized by the A / D converter 32. The digitized audio signal is input to the CPU 35 and is arithmetically processed by the RAM 34, the CPU 35, and the DSP 36 according to the routine stored in the ROM 33.

When the audio signal digitized by the A / D converter 32 is input to the CPU 35, the CPU 35 processes the data by R by the interrupt processing.
Store in AM34. Next, the data stored in the RAM 34 is sent to the DSP 36, and the DSP 36 extracts the first formant and the second formant from the audio signal.

The first formant and the second formant extracted by the DSP36 indicate the vocalization sound of the trainee by the instruction of the cartridge type ROM33, and the display position of the model pronunciation “i”,
The line connecting the display position of "a" and the display position of "o" of the model pronunciation is inverted around the center and displayed on the color monitor television 40 as shown in FIG.

In other words, if the model pronunciation “U” is represented by the first formant on the horizontal axis and the second formant on the vertical axis,
What is represented in the position shown in FIG. 3B is represented by the present invention in the position shown in FIG. 3C.

On the other hand, by inverting the line connecting the display position of "i" of the model pronunciation and the position between the display position of "a" and the display position of "O" of the model pronunciation shown in FIG. The display of the first formant and the second formant corresponds to the position of the tongue when the trainee utters a vocal sound, as shown in FIG.

Thereby, the trainee can know what utterance sound is produced by which position of the display means the utterance sound produced by the trainee is represented.

For this reason, when the trainee practices "U" vocalization,
For example, when the utterance sound of the trainee utters the utterance sound shown at the position D in FIG. 3, the trainee determines from the position D of the utterance sound uttered by the trainee and the position C of the target utterance sound, By moving the position of the tongue in the direction of arrow E and uttering, it is possible to determine whether the target utterance sound is approached. As a result, the trainee can easily bring the voicing sound uttered by himself close to the target voicing sound.

Although the example in which the trainee trains the utterance sound of "U" is shown, the other "I", "E", "A", and "O" can also be practiced in the same manner.

You can also practice vocalization for 10 American and English vowels.

[Brief description of drawings]

Fig. 1 is a block diagram of a vocal training machine, and Fig. 2 is the first on the horizontal axis.
Formant, a graph showing the second formant on the vertical axis, FIG. 3 is an explanatory diagram showing the position of the vocal sound displayed on the color monitor television, and FIG. 4 shows the relationship between the vocal sound and the tongue position of the trainee. FIG. In the figure, 20 ... Microphone (detection means), 30 ... Control circuit, 40 ... Color monitor TV (display means)

Continuation of the front page (56) Reference JP 62-7081 (JP, A) JP 62-2286 (JP, A) JP 61-160800 (JP, A) JP 61-154549 (JP , A) JP 61-118799 (JP, A)

Claims (1)

(57) [Claims] 1. A control circuit comprising a detecting means for detecting a voiced sound of a trainee as a voice signal, and an extracting portion for extracting a first formant and a second formant from the voice signal detected by the detecting means, And a display means for visually displaying the output information of the control circuit to the trainee, wherein the control circuit outputs the model pronunciations "i", "a", "o", and the first formant. The horizontal axis represents the second formant, and the vertical axis represents the modeled pronunciation “i” and the positions between the modeled “a” and “o”. In conclusion, the vocal training apparatus is characterized in that the first formant extracted by the extraction unit is represented on the horizontal axis and the second formant represented on the vertical axis is inverted about the straight line and displayed on the display means.