CN113453104A

CN113453104A - Automobile active noise reduction sound equipment and noise reduction method thereof

Info

Publication number: CN113453104A
Application number: CN202110920881.9A
Authority: CN
Inventors: 于学华
Original assignee: Yancheng Institute of Technology
Current assignee: Yancheng Institute of Technology
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2021-09-28

Abstract

The invention discloses an automobile active noise reduction sound and a noise reduction method thereof, wherein the method comprises the following steps: the mounting panel, the inside that the side of mounting panel was provided with fixing base and fixing base is provided with the mounting groove, the side that the inside of mounting groove was provided with spring post and spring post is provided with the layer board, the side of layer board is provided with mutual gomphosis between shell body and the mounting groove, the side that the inside of shell body is provided with stereo set body and mounting panel is provided with the controller. The foam layer, the noise reduction layer and the rubber layer are arranged inside the cover body from inside to outside at one time, vibration generated by the loudspeaker is greatly slowed down by the foam layer, so that buffering exists between the loudspeaker and the sound box, resonance caused by the loudspeaker basically disappears, noise generated in the working process of the sound box is effectively absorbed through the noise reduction layer to achieve a sound absorption effect, the outermost rubber layer plays a protection role, and a noise reduction space is formed between the enclosing plate and the top cover to reduce the generation of the noise.

Description

Automobile active noise reduction sound equipment and noise reduction method thereof

Technical Field

The invention relates to the technical field of automobile active noise reduction sound equipment, in particular to an automobile active noise reduction sound equipment and a noise reduction method thereof.

Background

An auto audio (auto audio) is a sound receiving and reproducing device provided to reduce a feeling of dryness during traveling of a driver and a passenger. The earliest used AM radio for cars, and later AM FM radio and tape player, developed to CD player and compatible DCC, DAT digital audio. The existing automobile sound equipment reaches higher standards in all aspects of tone quality, operation, vibration prevention and the like, can cope with jolting of an automobile on a rugged road, and ensures the stability of performance and the perfection of tone quality.

At present, when the existing automobile sound equipment is used, the sound effect is poor due to the influence of the external environment, and the use is influenced. Therefore, a new technical solution needs to be provided.

Disclosure of Invention

The invention aims to provide an automobile active noise reduction sound and a noise reduction method thereof, and solves the problems that the existing automobile sound is poor in sound effect and influences the use due to the influence of the external environment when in use.

In order to achieve the purpose, the invention provides the following technical scheme: an active noise reduction sound box of an automobile and a noise reduction method thereof comprise the following steps: the side surface of the mounting plate is provided with a fixing seat, the inside of the fixing seat is provided with a mounting groove, the inside of the mounting groove is provided with a spring column, the side surface of the spring column is provided with a supporting plate, the side surface of the supporting plate is provided with an outer shell, the outer shell is embedded with the mounting groove, the inside of the outer shell is provided with a sound body, the side surface of the mounting plate is provided with a controller, the controller is connected with the sound body through a wire, the side surface of the outer shell is provided with a cover body, the surface of the cover body is provided with a coaming, the inside of the coaming is provided with a top cover, the surface of the top cover is provided with a plurality of groups of sound holes, the inside of the cover body is sequentially provided with a foam layer, a noise reduction layer and a rubber layer from inside to outside, the foam layer, the noise reduction layer and the rubber layer are all fixedly connected with the cover body, and a noise reduction space is formed between the cover body and the top cover body, the left side that the inside of controller was provided with control module and control module is connected with audio processing module, including initiative noise reduction module and audio frequency detection module in the audio processing module, the side that the side of initiative noise reduction module is connected with audio signal and amplifies module and audio frequency detection module is connected with constant current source circuit module, control module's right side is connected with electromagnetism noise reduction circuit module and signal filtering module, the side of electromagnetism noise reduction circuit module and signal filtering module is connected with audio output module and audio output terminal module and loudspeaker/speaker.

In a preferred embodiment of the present invention, the surface of the mounting plate is provided with fixing bolts and the fixing bolts are provided with a plurality of groups and distributed circumferentially.

As a preferred embodiment of the present invention, a clamping groove is formed in an outer side of a bottom of the outer housing, a clamping block is arranged in an opening of the mounting groove, and the clamping block and the clamping groove are mutually embedded.

As a preferred embodiment of the present invention, a filling groove is formed in the outer casing, and a plurality of groups of sound insulation boards are arranged in the filling groove, the sound insulation boards are arranged in an isosceles trapezoid structure, the filling groove forms a plurality of groups of sound insulation grooves with the same structure through the sound insulation boards, and the sound insulation grooves are filled with sound insulation cotton.

In a preferred embodiment of the present invention, the inner diameter of the sound outlet hole increases from inside to outside once, so that the outer diameter of the sound outlet hole is larger than the inner diameter of the sound outlet hole.

As a preferred embodiment of the present invention, the noise reduction method for an active noise reduction sound of an automobile includes the following steps:

step 1: detecting the noise in the external environment and the played audio by using an audio detection module in the audio processing module, and starting an active noise reduction module after judging the noise;

step 2: the control module starts a noise reduction circuit in the active noise reduction module to generate suppression waves with the phase opposite to that of the collected noise sound waves for noise reduction, and meanwhile, the audio signal amplification module amplifies the original sound and stably outputs the amplified sound through the constant current source circuit module;

and step 3: the output audio frequency is subjected to noise reduction and filtration through the electromagnetic noise reduction circuit module and the signal filtering module, so that internal noise is filtered, and the audio frequency quality output by the sound box is ensured.

Compared with the prior art, the invention has the following beneficial effects:

the invention is provided with a fixed seat on the side of a mounting plate, a mounting groove is arranged in the fixed seat, a spring column is arranged in the mounting groove, a supporting plate is arranged on the side of the spring column, an outer shell is arranged on the surface of the supporting plate, the outer shell and the mounting groove are mutually embedded, a clamping groove is arranged on the surface of the outer shell, a clamping block is arranged at the opening of the mounting groove, the clamping block and the clamping groove are mutually embedded, the arrangement ensures the mounting stability of the outer shell, reduces vibration and reduces noise, a sound body is arranged in the outer shell, a cover body is arranged outside the outer shell, a surrounding plate is arranged on the side of the cover body, a top cover is arranged in the surrounding plate, a sound outlet hole is arranged in the top cover, the opening of the sound outlet hole is gradually enlarged, the sound outlet effect is improved, and a foam layer, a noise reduction layer and a rubber layer are arranged in the cover body from inside to outside, the foam layer is utilized to greatly slow down the vibration generated by the loudspeaker, so that the buffer exists between the loudspeaker and the sound equipment, the resonance caused by the loudspeaker basically disappears, the noise generated in the working process of the sound equipment is effectively absorbed by the noise reduction layer, the sound absorption effect is achieved, the protection effect is achieved by the outermost rubber layer, a noise reduction space is formed between the enclosing plate and the top cover, so that the noise is reduced, the filling groove is arranged in the outer shell, the sound insulation plate is arranged in the filling groove, the sound insulation plate is arranged in an isosceles trapezoid structure, the filling groove is divided into a plurality of groups of sound insulation grooves with the same shape, the sound insulation plate is filled with sound insulation cotton, so that the noise diffusion is reduced, the controller is arranged on the side surface of the mounting plate, the controller is connected with the sound equipment body, the audio processing module is arranged in the controller, and the active noise reduction module and the audio detection module are arranged in the audio processing module, the side of the active noise reduction module is connected with an audio signal amplification module, the side of the audio detection module is connected with a constant current source circuit module, the side of the controller is connected with an electromagnetic noise reduction circuit module and a signal filtering module, the audio is processed through a noise reduction circuit, noise is removed, the purpose of noise reduction is achieved, and the sound equipment using effect is greatly improved by matching with physical noise reduction.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic diagram of a noise reduction process according to the present invention.

In the figure, 1, mounting plates; 2. fixing the bolt; 3. a fixed seat; 4. an outer housing; 5. filling the groove; 6. a sound insulating board; 7. silencing cotton; 8. a cover body; 9. enclosing plates; 10. a sound outlet hole; 11. a controller; 12. mounting grooves; 13. a spring post; 14. a support plate; 15. a clamping block; 16. a card slot; 17. a sound body; 18. a foam layer; 19. a noise reduction layer; 20. a rubber layer; 21. a noise reduction space; 22. and a top cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an active noise reduction sound box of an automobile and a noise reduction method thereof comprise the following steps: mounting panel 1, the side of mounting panel 1 is provided with fixing base 3 and the inside of fixing base 3 is provided with mounting groove 12, the inside of mounting groove 12 is provided with spring post 13 and the side of spring post 13 is provided with layer board 14, the side of layer board 14 is provided with shell 4 and the side of shell 4 and mounting groove 12 is gomphosis each other, the inside of shell 4 is provided with stereo set 17 and the side of mounting panel 1 is provided with controller 11, controller 11 is connected with stereo set 17 through the wire, the side of shell 4 is provided with lid 8 and the surface of lid 8 is provided with bounding wall 9, the inside of bounding wall 9 is provided with top cap 22 and the surface of top cap 22 is provided with a plurality of groups of sound holes 10, the inside of lid 8 has set gradually foam layer 18, noise reduction layer 19 and rubber layer 20 from inside to outside, foam layer 18, noise reduction layer 19 and rubber layer 20 all are fixedly connected with lid 8, a noise reduction space 21 is formed between the cover body 8 and the top cover 22, a control module is arranged in the controller 11, the left side of the control module is connected with an audio processing module, the audio processing module comprises an active noise reduction module and an audio detection module, the side surface of the active noise reduction module is connected with an audio signal amplification module, the side surface of the audio detection module is connected with a constant current source circuit module, the right side of the control module is connected with an electromagnetic noise reduction circuit module and a signal filtering module, the side surfaces of the electromagnetic noise reduction circuit module and the signal filtering module are connected with an audio output module, an audio output module and a loudspeaker/loudspeaker, a fixing seat 3 is arranged on the side surface of the mounting plate 1, a mounting groove 12 is arranged in the fixing seat 3, a spring column 13 is arranged in the mounting groove 12, a supporting plate 14 is arranged on the side surface of the spring column 13, and an outer shell 4 is embedded in the mounting groove 12, the surface of the outer shell 4 is provided with a clamping groove 16, an opening of the mounting groove 12 is provided with a clamping block 15, the clamping block 15 and the clamping groove 16 are mutually embedded, the arrangement ensures the mounting stability of the outer shell 4, reduces vibration and reduces noise, the inner part of the outer shell 4 is provided with a sound body 17, the outer part of the outer shell 4 is provided with a cover body 8, the side surface of the cover body 8 is provided with a baffle plate 9, the inner part of the baffle plate 9 is provided with a top cover 22, the inner part of the top cover 22 is provided with a sound outlet 10, the opening of the sound outlet 10 is gradually amplified, the sound effect is improved, meanwhile, the inner part of the cover body 8 is provided with a foam layer 18, a noise reduction layer 19 and a rubber layer 20 from inside to outside once, the vibration generated by the loudspeaker is greatly reduced by the foam layer 18, so that the buffer exists between the loudspeaker and the sound, resonance caused by the loudspeaker basically disappears, and the noise generated in the working process of the sound is effectively absorbed by the noise reduction layer 19, the sound absorption effect is achieved, the outermost rubber layer 20 plays a protective role, a noise reduction space 21 is formed between the enclosing plate 9 and the top cover 22 to reduce the noise, the filling groove 5 is arranged in the outer shell 4, the sound insulation plate 6 is arranged in the filling groove 5, the sound insulation plate 6 is arranged in an isosceles trapezoid structure, the filling groove 5 is divided into a plurality of groups of sound insulation grooves with the same shape, silencing cotton 7 is filled in the sound insulation grooves to reduce the noise diffusion, the side surface of the mounting plate 1 is provided with a controller 11, the controller 11 is connected with the sound body 17, the controller 11 is internally provided with an audio processing module, the audio processing module comprises an active noise reduction module and an audio detection module, the side surface of the active noise reduction module is connected with an audio signal amplification module, the side surface of the audio detection module is connected with a constant current source circuit module, and the side surface of the controller 11 is connected with an electromagnetic noise reduction circuit module and a signal filtering module, the audio frequency is processed through the noise reduction circuit, noise is removed, the purpose of noise reduction is achieved, and the using effect of the sound box is greatly improved by matching with physical noise reduction.

Further improved, as shown in fig. 1: the surface of mounting panel 1 is provided with fixing bolt 2 and is provided with a plurality of groups and circumference distribution, and fixing bolt 2 sets up the installation and the dismantlement that make things convenient for mounting panel 1.

Further improved, as shown in fig. 2: the bottom outside of shell body 4 is provided with draw-in groove 16 and the opening of mounting groove 12 is provided with fixture block 15, mutual gomphosis between fixture block 15 and the draw-in groove 16, fixture block 15 cooperation draw-in groove 16 is fixed, has guaranteed the stability of shell body 4 installation.

Further improved, as shown in fig. 1: the inside of shell body 4 is provided with filling groove 5 and the inside of filling groove 5 is provided with a plurality of groups acoustic celotex board 6, acoustic celotex board 6 is the setting of isosceles trapezoid structure, filling groove 5 forms the same acoustic celotex groove of a plurality of groups structure and just is filled at the acoustic celotex inslot intussuseption with amortization cotton 7 through acoustic celotex board 6, and this kind of setting makes filling groove 5 separate and is the same acoustic celotex groove of a plurality of groups shape, and it has amortization cotton 7 to fill in its inside to reduce the diffusion of noise.

Further improved, as shown in fig. 2: the inner diameter of the sound outlet hole 10 is gradually increased from inside to outside, so that the outer aperture is larger than the inner aperture, the opening of the sound outlet hole 10 is gradually enlarged, and the sound outlet effect is improved.

In a further improvement, the noise reduction method of the active noise reduction sound equipment of the automobile comprises the following steps:

The invention is provided with a fixed seat 3 on the side of a mounting plate 1, a mounting groove 12 is arranged inside the fixed seat 3, a spring column 13 is arranged inside the mounting groove 12, a supporting plate 14 is arranged on the side of the spring column 13, an outer shell 4 is arranged on the surface of the supporting plate 14, the outer shell 4 and the mounting groove 12 are mutually embedded, a clamping groove 16 is arranged on the surface of the outer shell 4, a clamping block 15 is arranged at the opening of the mounting groove 12, the clamping block 15 and the clamping groove 16 are mutually embedded, the arrangement ensures the mounting stability of the outer shell 4, reduces vibration and reduces noise, a sound body 17 is arranged inside the outer shell 4, a cover body 8 is arranged outside the outer shell 4, a surrounding plate 9 is arranged on the side of the cover body 8, a top cover 22 is arranged inside the surrounding plate 9, sound outlet holes 10 are arranged inside the top cover 22, the openings of the sound outlet holes 10 are gradually enlarged, and the sound outlet effect is improved, meanwhile, the foam layer 18, the noise reduction layer 19 and the rubber layer 20 are arranged inside the cover body 8 from inside to outside at one time, vibration generated by the loudspeaker is greatly reduced by utilizing the foam layer 18, so that buffering exists between the loudspeaker and the sound, resonance caused by the loudspeaker basically disappears, noise generated in the working process of the sound is effectively absorbed by the noise reduction layer 19, a sound absorption effect is achieved, the outermost rubber layer 20 plays a role in protection, a noise reduction space 21 is formed between the coaming 9 and the top cover 22, so as to reduce the generation of the noise, the filling groove 5 is arranged inside the outer shell 4, the sound insulation plate 6 is arranged inside the filling groove 5, the sound insulation plate 6 is arranged in an isosceles trapezoid structure, the filling groove 5 is divided into a plurality of groups of sound insulation grooves with the same shape, the sound insulation cotton 7 is filled inside the sound insulation groove, so as to reduce the diffusion of the noise, the controller 11 is arranged on the side surface of the mounting plate 1, and the controller 11 is connected with the sound body 17, be provided with in the controller 11 and fall module and audio frequency detection module of making an uproar including the initiative in audio frequency processing module and the audio frequency processing module, the initiative is fallen the module side of making an uproar and is connected with audio signal and amplify the module and the audio frequency detection module side is connected with constant current source circuit module, be connected with electromagnetism in the side of controller 11 simultaneously and fall the circuit module and the signal filtering module of making an uproar, handle the audio frequency through falling the circuit of making an uproar, thereby get rid of the noise and reach the purpose of making an uproar, the cooperation physics is fallen and is made an uproar, the stereo set result of use has been improved greatly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automobile active noise reduction sound equipment and a noise reduction method thereof are characterized in that: the method comprises the following steps: the sound box comprises a mounting plate (1), wherein a fixing seat (3) is arranged on the side surface of the mounting plate (1), a mounting groove (12) is arranged inside the fixing seat (3), a spring column (13) is arranged inside the mounting groove (12), a supporting plate (14) is arranged on the side surface of the spring column (13), an outer shell (4) is arranged on the side surface of the supporting plate (14), the outer shell (4) is embedded with the mounting groove (12), a sound body (17) is arranged inside the outer shell (4), a controller (11) is arranged on the side surface of the mounting plate (1), the controller (11) is connected with the sound body (17) through a wire, a cover body (8) is arranged on the side surface of the outer shell (4), a surrounding plate (9) is arranged on the surface of the cover body (8), a top cover (22) is arranged inside the surrounding plate (9), and a plurality of sound outlet holes (10) are formed in the surface of the top cover (22), the cover body (8) is internally provided with a foam layer (18), a noise reduction layer (19) and a rubber layer (20) from inside to outside in sequence, the foam layer (18), the noise reduction layer (19) and the rubber layer (20) are fixedly connected with the cover body (8), a noise reduction space (21) is formed between the cover body (8) and the top cover (22), a control module is arranged in the controller (11), the left side of the control module is connected with an audio processing module, the audio processing module comprises an active noise reduction module and an audio detection module, the side surface of the active noise reduction module is connected with an audio signal amplification module, the side surface of the audio detection module is connected with a constant current source circuit module, the right side of the control module is connected with an electromagnetic noise reduction circuit module and a signal filtering module, and the sides of the electromagnetic noise reduction circuit module and the signal filtering module are connected with an audio output module, an audio output module and a loudspeaker/loudspeaker.

2. The active noise reduction sound box and the noise reduction method thereof of the automobile according to claim 1, characterized in that: the surface of mounting panel (1) is provided with fixing bolt (2) and fixing bolt (2) are provided with a plurality of groups and circumference distribution.

3. The active noise reduction sound box and the noise reduction method thereof of the automobile according to claim 1, characterized in that: the bottom outside of shell body (4) is provided with draw-in groove (16) and the opening of mounting groove (12) is provided with fixture block (15), mutual gomphosis between fixture block (15) and draw-in groove (16).

4. The active noise reduction sound box and the noise reduction method thereof of the automobile according to claim 1, characterized in that: the inside of shell body (4) is provided with filling groove (5) and the inside of filling groove (5) is provided with a plurality of groups acoustic celotex board (6), acoustic celotex board (6) are the isosceles trapezoid structure setting, filling groove (5) form the same acoustic celotex groove of a plurality of groups structure and fill in the acoustic celotex groove and have amortization cotton (7) through acoustic celotex board (6).

5. The active noise reduction sound box and the noise reduction method thereof of the automobile according to claim 1, characterized in that: the inner diameter of the sound outlet hole (10) is increased gradually from inside to outside once, so that the outer aperture is larger than the inner aperture.

6. The active noise reduction sound box and the noise reduction method thereof of the automobile according to claim 1, characterized in that: the noise reduction method of the automobile active noise reduction sound comprises the following steps: