CN111883157A

CN111883157A - Language education system applied to mask environment

Info

Publication number: CN111883157A
Application number: CN202010715898.6A
Authority: CN
Inventors: 宋勖元
Original assignee: Guangdong Vocational and Technical College
Current assignee: Guangdong Vocational and Technical College
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-11-03

Abstract

The invention discloses a language education system applied to a mask environment, which comprises: the device comprises a sound receiving module, a filter module, an amplifying module and an output module; the sound receiving module is used for receiving a sound signal transmitted from the mask and carrying out sound-electricity conversion to obtain a first signal; the filter module is used for filtering the first signal to obtain a second signal; the amplifying module is used for amplifying the second signal to obtain a third signal; the output module is used for converting the third signal into a sound signal and outputting the sound signal; the filtering frequency of the filter module is as follows: less than or equal to 500 HZ. By arranging the filter module and filtering the sound frequency less than or equal to 500HZ by the filter module, the noise caused by the mask is removed, and the purpose of improving the definition of the voice is achieved. The invention is mainly used for the technical field of teaching.

Description

Language education system applied to mask environment

Technical Field

The invention relates to the technical field of education, in particular to a language education system applied to a mask environment.

Background

For language education, pronunciation accuracy is pursued. However, in some cases of wearing a mask, the sound of the teacher is affected by the mask, resulting in too low a sound volume and a certain amount of disturbing noise. The existing solution is to enlarge and output the sound of the teacher through a sound amplifying device. However, when a user wears the mask, unnecessary noise is generated during pronunciation, and the noise is amplified by the amplifying device to affect pronunciation output of the amplifying device, so that the teaching quality is reduced.

Disclosure of Invention

The invention aims to provide a language education system applied to a mask environment, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.

The solution of the invention for solving the technical problem is as follows: a language education system applied to a mask environment, comprising: the device comprises a sound receiving module, a filter module, an amplifying module and an output module; the sound receiving module is used for receiving a sound signal transmitted from the mask and carrying out sound-electricity conversion to obtain a first signal; the filter module is used for filtering the first signal to obtain a second signal; the amplifying module is used for amplifying the second signal to obtain a third signal; the output module is used for converting the third signal into a sound signal and outputting the sound signal; the filtering frequency of the filter module is as follows: less than or equal to 500 HZ.

Further, the filtering frequency of the filter module is: 62HZ to 500 HZ.

Further, the sound receiving module is a microphone.

Further, the output module is a sound box.

Further, the amplifying module is a class A power amplifier. The distortion degree can be reduced by the class A power amplifier.

Further, the filter module and the amplification module are integrated together. By integrating the filter module and the amplification module together, the communication distance between the filter module and the amplification module is shortened, and distortion in the communication process is avoided.

Further, the amplifying module is wirelessly connected with the output module. Through wireless connection, the restriction of space has been worried for in the position of output module is placed more nimble. The flexibility of the whole teaching activity is improved.

Further, the amplifying module and the output module are communicated through a Bluetooth communication protocol.

Further, the sound receiving module is wirelessly connected with the filter module. Through wireless connection, the restriction of space is worried over for it is more nimble in the position of sound receiving module is placed. The flexibility of the whole teaching activity is improved.

Furthermore, the sound receiving module is in communication connection with the filter module through a Bluetooth protocol.

The invention has the beneficial effects that: provided is a language education system applied to a mask environment, comprising: the device comprises a sound receiving module, a filter module, an amplifying module and an output module; the sound receiving module is used for receiving a sound signal transmitted from the mask and carrying out sound-electricity conversion to obtain a first signal; the filter module is used for filtering the first signal to obtain a second signal; the amplifying module is used for amplifying the second signal to obtain a third signal; the output module is used for converting the third signal into a sound signal and outputting the sound signal; the filtering frequency of the filter module is as follows: less than or equal to 500 HZ. By arranging the filter module and filtering the sound frequency less than or equal to 500HZ by the filter module, the noise caused by the mask is removed, and the purpose of improving the definition of the voice is achieved.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

Fig. 1 is a schematic diagram of a system module connection structure of a language education system.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Example 1, referring to fig. 1, a language education system applied to a mask environment, comprising: a sound receiving module 100, a filter module 200, an amplifying module 300 and an output module 400; the sound receiving module 100 is configured to receive a sound signal transmitted from the mask and perform sound-electricity conversion to obtain a first signal; the filter module 200 is configured to filter the first signal to obtain a second signal; the amplifying module 300 is configured to amplify the second signal to obtain a third signal; the output module 400 is configured to convert the third signal into a sound signal and output the sound signal; the filtering frequency of the filter module 200 is: less than or equal to 500 HZ.

The specific functions of the educational system are: the sound receiving module 100 receives sound signals transmitted from the mask, and obviously, noise generated by vibration of the mask is included in the sound signals. Therefore, noise generated by the vibration of the mask in the sound signal is filtered by the filter module 200, and finally, the filtered sound signal is amplified and output. Thereby avoiding amplifying noise and improving the definition of sound. In the present educational system, it is critical to determine the frequency of noise that the filter module 200 needs to filter. For this purpose, the noise frequency was confirmed by setting a survey experiment.

In order to explore the relationship between frequency and sharpness. The frequency range is divided into a plurality of groups, wherein the frequency range of the first group is 62HZ-250HZ, the frequency range of the second group is 250HZ-500HZ, the frequency range of the third group is 500HZ-1000HZ, the frequency range of the fourth group is 1000HZ-2000HZ, the frequency range of the fifth group is 2000HZ-4000HZ, and the frequency range of the sixth group is 4000HZ-8000 HZ. Investigation experiments were performed for these six sets of frequencies, wherein the manner of investigation experiments was as follows:

1. recording a section of common vocal cords emitted by a wearing mask;

2. placing the vocal cords in an acoustic conditioning device;

3. amplifying the frequencies of the first group, the frequencies of the second group, the frequencies of the third group, the frequencies of the fourth group, the frequencies of the fifth group and the frequencies of the sixth group respectively by the sound adjusting device;

4. respectively obtaining vocal cords for shielding corresponding frequencies, wherein the vocal cords are divided into a first vocal cord, a second vocal cord, a third vocal cord, a fourth vocal cord, a fifth vocal cord and a sixth vocal cord;

5. the first vocal cord, the second vocal cord, the third vocal cord, the fourth vocal cord, the fifth vocal cord and the sixth vocal cord are respectively listened to 100 testers, and then the testers perform definition identification voting.

The clarity results obtained are shown in table 1:

amplified frequency range (HZ)	Definition ratio (%)
		62-250	1
250-500	3
		500-1000	35
1000-2000	35
		2000-4000	13
4000-8000	13

As can be seen from table 1, only 4% of the testers can recognize vocal cord contents when amplifying frequencies from 62HZ to 500 HZ. Therefore, most of the voice can be judged to be noise brought by the mask in the frequency less than or equal to 500 HZ.

Based on the above investigation experiment results, the filter module 200 is arranged, and the sound frequency less than or equal to 500HZ is filtered by the filter module 200, so that the noise caused by the mask is removed, and the purpose of improving the definition of the voice is achieved.

In some preferred embodiments, the filtering frequency of the filter module 200 is: 62HZ to 500 HZ.

In some preferred embodiments, the sound receiving module 100 is a microphone.

The connection modes between the sound receiving module 100, the filter module 200, the amplifying module 300 and the output module 400 may be wireless or wired. When the sound receiving module 100 is connected to the filter module 200 by a cable, the filter module may be connected to the sound receiving module by an AUX interface. Of course, the sound receiving module 100 can also be connected to the filter module 200 in a wireless manner, and is usually connected to the filter module 200 in a bluetooth communication manner. Such as a bluetooth microphone, etc. For the connection of the filter module 200 and the amplification module 300, a wired connection is preferred. Also, in some preferred embodiments, the filter module 200 is integrated with the amplification module 300. Therefore, the communication quality between the filter module 200 and the amplifying module 300 can be improved, and signal distortion can be avoided. The amplification module 300 and the output module 400 are preferably connected wirelessly. Specifically, the communication connection can be performed through a bluetooth communication protocol. Through the wireless connection mode, can bai tuo the space restriction of communication line for output module 400 is more nimble in placing on spatial position, convenient teaching.

The amplifying module 300 mainly amplifies the filtered signal, wherein the amplifying module 300 is preferably a class a power amplifier. The amplifying module 300 has good amplifying effect and low distortion.

In some embodiments, the output module 400 is a sound box.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention and its scope is defined by the claims appended hereto.

Claims

1. A language education system applied to a mask environment, comprising: the device comprises a sound receiving module, a filter module, an amplifying module and an output module; the sound receiving module is used for receiving a sound signal transmitted from the mask and carrying out sound-electricity conversion to obtain a first signal; the filter module is used for filtering the first signal to obtain a second signal; the amplifying module is used for amplifying the second signal to obtain a third signal; the output module is used for converting the third signal into a sound signal and outputting the sound signal; the filtering frequency of the filter module is as follows: less than or equal to 500 HZ.

2. The system of claim 1, wherein the filter module filters at a frequency of: 62HZ to 500 HZ.

3. The system of claim 1, wherein the sound receiving module is a microphone.

4. The system of claim 1, wherein the output module is a speaker.

5. The system of claim 1, wherein the amplifying module is a class a power amplifier.

6. A language education system applied to the mask environment according to claim 1 wherein the filter module and the amplification module are integrated.

7. The system of claim 1, wherein the amplification module is wirelessly connected to the output module.

8. The system of claim 7, wherein the amplification module communicates with the output module via a bluetooth communication protocol.

9. The system of claim 1, wherein the sound receiving module is wirelessly connected to the filter module.

10. The system of claim 9, wherein the sound receiving module is in communication with the filter module via bluetooth protocol.