CN105667431B - A kind of noise reduction method and system - Google Patents
A kind of noise reduction method and system Download PDFInfo
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- CN105667431B CN105667431B CN201511028006.0A CN201511028006A CN105667431B CN 105667431 B CN105667431 B CN 105667431B CN 201511028006 A CN201511028006 A CN 201511028006A CN 105667431 B CN105667431 B CN 105667431B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
- B60R16/0373—Voice control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Air Bags (AREA)
Abstract
The invention discloses a kind of noise reduction method and system, the noise reduction method includes：Microphone by being set to different location in compartment acquires the source of sound in compartment；The sound of people is isolated out of described source of sound；According to different microphones the sound of collected people calculate occupant position；Car audio system is opened, active noise reduction is carried out to occupant position.The present invention carries out active noise reduction using car audio system, effectively reduces the noise of personnel's seating position in compartment, improves riding quality.
Description
Technical field
The present invention relates to automotive engineerings, more particularly to a kind of noise reduction method and system.
Background technology
The noise of automobile mostlys come from that road is made an uproar, tire is made an uproar, wind is made an uproar and several aspects such as engine noise, in automobile bodies
Noise control, which is a part critically important in automotive engineering, all has vehicle cabin noise control especially to Advanced Sedan Car
Very high requirement.And in the prior art, the noise suppression in automobile bodies is mainly by improving subtracting for compartment leakproofness, chassis
Shake system, the soundproof effect of enging cabin and the mute tire of selection etc..Above-mentioned technology belongs to passive noise reduction technology, really
The noise decibel in compartment, but the limitation of its noise reduction, especially in galloping, the noise in compartment can be reduced
Still very strong.
Invention content
In order to solve the above technical problems, the present invention provides a kind of noise reduction method, for further decreasing automobile bodies
Interior noise improves the riding comfort of passenger.
The invention is realized in this way：
A kind of noise reduction method, including：
Judge automobile current driving speed whether be more than predetermined threshold value, if so, carry out active noise reduction, if it is not, then not into
Row active noise reduction, active noise reduction include the following steps：
To the air bag inflation defaulted in automobile door sealing adhesive tape, car door sound-proofing is improved；
Microphone by being set to different location in compartment acquires the source of sound in compartment；People is isolated out of described source of sound
Sound；According to different microphones the sound of collected people calculate occupant position；Open automobile audio system
System carries out active noise reduction to occupant position.
Further, in the unlatching car audio system, before carrying out active noise reduction to occupant position, also
Including：According to collected source of sound isolate the noise of occupant position；Calculate everyone position in compartment
Noise be formed by an acoustic centre of source position；And the spectrogram of the analysis noise；The unlatching car audio system, to vehicle
Interior personnel position carries out active noise reduction, including：Car audio system is opened, the sound field centre bit of car audio system is adjusted
It sets to the noise and is formed by an acoustic centre of source position；It generates and differs 180 degree with the frequency of the noise and amplitude same phase
Inhibition wave to noise carry out noise reduction.
Further, the microphone is set to the A columns in automobile bodies, on B columns and steering wheel.
Further, it is described according to different microphones collected people sound calculate occupant position packet
It includes：Analyze each microphone the sound of collected people frequency spectrum；Calculate the sound of the identical people of frequency in each microphone
Acquisition time；The frequency is calculated according to the acquisition time difference of the installation position of each microphone and the sound of the people of same frequency
Position where the voice of rate.
Further, it is calculated in each microphone after the acquisition time of the sound of the identical people of frequency described, also
Including：Calculate the volume of the sound of the identical people of frequency in each microphone；According to each microphone position and same frequency
People sound acquisition time difference calculate the position where the voice of the frequency after, further include：According to each microphone
Volume of the sound of position and same frequency people in different microphones carries out the position where the calculated voice
Verification.
In order to solve the above technical problems, another technical solution provided by the invention is：
A kind of automobile noise reduction system, including：It is set to the microphone of different location in compartment, car audio system, inflation
Air bag and control unit；The microphone is used to acquire the source of sound in compartment；The air bag is set to automobile door sealing
In adhesive tape, air bag is connected to air source；Described control unit be used for when automobile current driving speed be more than predetermined threshold value when into
Row active noise reduction, the active include：It controls air source to inflate to air bag, improves car door sound-proofing；According to different microphones
The sound of collected people calculate occupant position；And the car audio system is opened to control unit meter
The occupant position of calculating carries out active noise reduction.
Further, described control unit includes source of sound analysis module and computing module；The source of sound analysis module is used for
According to collected source of sound isolate the noise of occupant position and the spectrogram of noise；The computing module is used for
The noise for calculating everyone position in compartment is formed by an acoustic centre of source position；The car audio system includes in sound field
Heart position adjustment unit and noise suppressed sound generate unit；Sound field center adjustment unit is for opening automobile audio system
System, sound field center to the noise for adjusting car audio system are formed by an acoustic centre of source position；The noise suppressed
Sound generation unit is used to generate the inhibition wave for differing 180 degree with the frequency of the noise and amplitude same phase and is dropped to noise
It makes an uproar.
Further, the microphone is set to the A columns in automobile bodies, on B columns and steering wheel.
Further, described control unit includes source of sound analysis module and computing module；The source of sound analysis module is used for
Analyze each microphone the sound of collected people frequency spectrum；The computing module is identical for calculating frequency in each microphone
People sound acquisition time, and sound according to the people of the installation position and same frequency of each microphone acquisition
Time difference calculates the position where the voice of the frequency.
Further, the source of sound analysis module is additionally operable to calculate the sound of the sound of the identical people of frequency in each microphone
Amount；The computing module is additionally operable to the sound in different microphones according to the position of each microphone and the sound of same frequency people
Amount verifies the position where the calculated voice.
Beneficial effects of the present invention are：The present invention carries out active noise reduction when automobile is more than certain speed, by improving vehicle
The sound-proofing of door improves soundproof effect, and positions the position of personnel in compartment by the source of sound of microphone acquisition, and passes through
Car audio system carries out active noise reduction to occupant position, and in noise-reduction method of the present invention, the noise reduction setting of sound equipment can
It is flexibly adjusted according to the number of occupant and the position sat, can obviously reduce making an uproar for occupant position
Sound improves the riding quality of automobile；Noise reduction process of the present invention can carry out automatically, without human intervention, using intelligent, convenient.
Description of the drawings
Fig. 1 is the flow chart of an embodiment of the present invention noise reduction method；
Fig. 2 is the module frame chart of another embodiment automobile noise reduction system of the present invention.
Label declaration：
10, control unit；20, microphone；30 car audio systems；40, air bag.
Specific implementation mode
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is coordinated to be explained in detail.
Referring to Fig. 1, embodiment of the present invention, a kind of noise reduction method, including：
Judge automobile current driving speed whether be more than predetermined threshold value, if so, carry out active noise reduction, if it is not, then not into
Row active noise reduction, wherein the predetermined threshold value is 60 kilometer per hours, and active noise reduction includes the following steps：
S1, it is inflated to the air bag defaulted in automobile door sealing adhesive tape, improves car door sound-proofing；
S2, the source of sound by being set in the microphone acquisition compartment of different location in compartment；
S3, the sound that people is isolated out of described source of sound；
S4, according to different microphones the sound of collected people calculate occupant position；
S5, car audio system is opened, active noise reduction is carried out to occupant position.
Present embodiment noise reduction method is active noise reduction, is changed first to the car door sealing rubber strip of automobile
Into existing sealing joint strip is to play door sealing by the elastic force of adhesive tape, therefore sealing effect is unlimited, and sound insulation is caused to be imitated
Fruit is bad.In the present embodiment, be provided in the cavity of the sealing joint strip of each car door can inflation/deflation air bag, often
A air bag is connected to air source, when speed is more than predetermined threshold value (at this time the wind of automobile make an uproar can bigger), controls air source pair
Air bag is inflated, to improve the leakproofness and soundproof effect of car door and vehicle body.Also, it in the present embodiment, actively drops
Make an uproar also using be set to car inside different location microphone acquire compartment in source of sound (including the sound and noise of people),
Because the sound of people and the frequency of interior noise are that have apparent difference, therefore carrying out spectrum analysis by the source of sound to acquisition can
Distinguish the voice and noise in source of sound.Wherein, the number of microphone is more than or equal to three, and microphone is set in compartment
Different position, it is preferred that the microphone is set to the A columns in automobile bodies, on B columns and steering wheel.And sound is in air
In propagation rate when fixed, about 350m/s, therefore, the time spent in same sound passes to different microphones is different
, therefore, the time difference of same sound is received according to microphone can calculate the sounding place of the sound away from each microphone
Range difference, and the position of the sounding point can be accurately calculated according to three or more microphones.
Therefore, it is described according to different microphones the sound of collected people calculate occupant position and include：
Analyze each microphone the sound of collected people frequency spectrum；
Calculate the acquisition time of the sound of the identical people of frequency in each microphone；
The frequency is calculated according to the acquisition time difference of the installation position of each microphone and the sound of the people of same frequency
Voice where position.
Wherein, the audible frequency of people is in 100Hz (bass) to 10000Hz (soprano) range, and people is in compartment
The frequency spoken mainly concentrates on 250Hz to 750Hz, and the frequency of noise is that comparison is continuous and not in said frequencies range
It is interior, therefore the sound of people can be analyzed by spectrum analysis.
In the present embodiment, in the S5, unlatching car audio system, active drop is carried out to occupant position
Before making an uproar, further include：
According to collected source of sound isolate the noise of occupant position；
The noise for calculating everyone position in compartment is formed by an acoustic centre of source position；And
Analyze the spectrogram of the noise.
The unlatching car audio system carries out active noise reduction to occupant position, including：
Car audio system is opened, sound field center to the noise for adjusting car audio system is formed by sound
Center；
The inhibition wave that 180 degree is differed with the frequency of the noise and amplitude same phase is generated to noise progress noise reduction.
Therefore, used noise reduction mode is different from other audio defeats in the present embodiment, and present embodiment is not
It is using entire compartment as the object of noise reduction, but using the position where personnel in compartment as noise reduction object, i.e., if car only has
One people of driver, then the noise that only the analysis person of driving seat is distinguished, and using the region as the object of sound system noise reduction, if vehicle
Only have driver's seat and passenger's seat there are personnel in compartment, then using the region where first row seat as noise reduction region.The drop of the present invention
The noise reduction setting of sound system is changed as the personnel in compartment are distributed different and noise variation in method for de-noising, to big
The big flexibility for improving noise reduction setting and the noise reduction for substantially increasing personnel position, improve the seating of automobile
Quality.
In the present embodiment, the acquisition time of the sound for calculating the identical people of frequency in each microphone it
Afterwards, further include：
Calculate the volume of the sound of the identical people of frequency in each microphone；
The frequency is calculated in the acquisition time difference of the sound according to the people of the position and same frequency of each microphone
After position where voice, further include：
According to volume of the sound of the position of each microphone and same frequency people in different microphones to the calculating
It is verified position where the voice gone out.
Decaying is obvious when being propagated in air due to sound, according to by comparing volume can be general
Judge distance of the sounding point away from sound receiving point.The sound that present embodiment passes through the people of the collected same frequency of each microphone
Volume, the sounding position for judging the sound that can be general, therefore by the volume in different microphones to the calculating
Position where the voice gone out, which carries out verification, can be effectively ensured the accuracy of occupant position calculating.Further, at this
In embodiment, it can also be arranged whether the superior sensor of pressure has personnel to detect on corresponding seat below each seat.This
Embodiment also promotes the acoustics that personnel take region while reducing the noise of occupant position.And this
Noise-reduction method can carry out automatically, convenient using intelligence without being manually adjusted and being arranged.
Referring to Fig. 2, another embodiment of the present invention is a kind of automobile noise reduction system, including：
It is set to the microphone 20 of different location in compartment, car audio system 30, air bag 40 and control unit 10；
The microphone 20 is used to acquire the source of sound in compartment；
The air bag 40 is set in automobile door sealing adhesive tape, and air bag is connected to air source；
Described control unit 10 is used to carry out active noise reduction, the master when automobile current driving speed is more than predetermined threshold value
It is dynamic to include：
It controls air source to inflate to air bag, improves car door sound-proofing；
According to different microphones the sound of collected people calculate occupant position；And
It opens the car audio system 30 and active noise reduction is carried out to the calculated occupant position of control unit.
Wherein, described control unit 10 includes source of sound analysis module and computing module；
The source of sound analysis module be used for according to the collected source of sound of institute isolate the noise of occupant position with
The spectrogram of noise；
The noise that the computing module is used to calculate everyone position in compartment is formed by an acoustic centre of source position；
The car audio system 30 includes that sound field center adjustment unit and noise suppressed sound generate unit；
Sound field center adjustment unit is for opening car audio system, in the sound field for adjusting car audio system
Heart position to the noise is formed by an acoustic centre of source position；
The noise suppressed sound generates unit and differs 180 degree with the frequency of the noise and amplitude same phase for generating
Inhibition wave to noise carry out noise reduction.
Preferably, the microphone is set to the A columns in automobile bodies, on B columns and steering wheel.
In the present embodiment, the source of sound analysis module be additionally operable to analyze each microphone the sound of collected people
Frequency spectrum；
The computing module is additionally operable to calculate the acquisition time of the sound of the identical people of frequency in each microphone, and
The voice institute of the frequency is calculated according to the acquisition time difference of the installation position of each microphone and the sound of the people of same frequency
Position.
Further, the source of sound analysis module is additionally operable to calculate the sound of the sound of the identical people of frequency in each microphone
Amount；
The computing module is additionally operable to according to the position of each microphone and the sound of same frequency people in different microphones
In volume the position where the calculated voice is verified.
Present embodiment be using the position where personnel in compartment as noise reduction object, the setting of the noise reduction of sound system be with
Personnel in compartment are distributed different and noise variations and change, to substantially increase the flexibility and significantly of noise reduction setting
The noise reduction for improving personnel position improves the riding quality of automobile.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of noise reduction method, which is characterized in that including：
Judge whether automobile current driving speed is more than predetermined threshold value, if so, active noise reduction is carried out, if it is not, then without master
Dynamic noise reduction, active noise reduction include the following steps：
To the air bag inflation defaulted in automobile door sealing adhesive tape, car door sound-proofing, the air bag setting are improved
In in the cavity of car door sealing rubber strip；
Microphone by being set to different location in compartment acquires the source of sound in compartment, and the microphone is set to automobile bodies
Interior A columns, on B columns and steering wheel；
The sound of people is isolated out of described source of sound；
According to different microphones the sound of collected people calculate occupant position；
Car audio system is opened, active noise reduction is carried out to occupant position；
It is described according to different microphones the sound of collected people calculate occupant position and include：
Analyze each microphone the sound of collected people frequency spectrum；
Calculate the acquisition time of the sound of the identical people of frequency in each microphone；
The people of the frequency is calculated according to the acquisition time difference of the installation position of each microphone and the sound of the people of same frequency
Position where sound.
2. noise reduction method according to claim 1, which is characterized in that in the unlatching car audio system, to vehicle
Before interior personnel position carries out active noise reduction, further include：
According to collected source of sound isolate the noise of occupant position；
The noise for calculating everyone position in compartment is formed by an acoustic centre of source position；And
Analyze the spectrogram of the noise；
The unlatching car audio system carries out active noise reduction to occupant position, including：
Car audio system is opened, sound field center to the noise for adjusting car audio system is formed by an acoustic centre of source
Position；
The inhibition wave that 180 degree is differed with the frequency of the noise and amplitude same phase is generated to noise progress noise reduction.
3. noise reduction method according to claim 1, which is characterized in that in the frequency phase in calculating each microphone
After the acquisition time of the sound of same people, further include：
Calculate the volume of the sound of the identical people of frequency in each microphone；
In the voice for calculating the frequency according to the acquisition time difference of the sound of the people of the position and same frequency of each microphone
After the position at place, further include：
According to volume of the sound of the position of each microphone and same frequency people in different microphones to described calculated
It is verified position where voice.
4. a kind of automobile noise reduction system, which is characterized in that including：
It is set to the microphone of different location, car audio system, air bag and control unit in compartment；
The microphone is set to the A columns in automobile bodies, on B columns and steering wheel, for acquiring the source of sound in compartment；
The air bag is set in the cavity of automobile door sealing adhesive tape, and air bag is connected to air source；
Described control unit is used to carry out active noise reduction, the active noise reduction when automobile current driving speed is more than predetermined threshold value
Including：
It controls air source to inflate to air bag, improves car door sound-proofing；
According to different microphones the sound of collected people calculate occupant position；And
It opens the car audio system and active noise reduction is carried out to the calculated occupant position of control unit；
Described control unit further includes source of sound analysis module and computing module；
The source of sound analysis module be used for analyze each microphone the sound of collected people frequency spectrum；
The computing module is used to calculate the acquisition time of the sound of the identical people of frequency in each microphone, and according to each
The acquisition time difference of the sound of the installation position of microphone and the people of same frequency calculates the position where the voice of the frequency
It sets.
5. automobile noise reduction system according to claim 4, which is characterized in that described control unit includes source of sound analysis module
And computing module；
The source of sound analysis module be used for according to collected source of sound isolate the noise and noise of occupant position
Spectrogram；
The noise that the computing module is used to calculate everyone position in compartment is formed by an acoustic centre of source position；
The car audio system includes that sound field center adjustment unit and noise suppressed sound generate unit；
Sound field center adjustment unit adjusts the sound field centre bit of car audio system for opening car audio system
It sets to the noise and is formed by an acoustic centre of source position；
The noise suppressed sound generates unit for generating the suppression for differing 180 degree with the frequency of the noise and amplitude same phase
Wave processed carries out noise reduction to noise.
6. automobile noise reduction system according to claim 4, which is characterized in that the source of sound analysis module is additionally operable to calculate each
The volume of the sound of the identical people of frequency in microphone；
The computing module is additionally operable to according to the position of each microphone and the sound of same frequency people in different microphones
Volume verifies the position where the calculated voice.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106297763B (en) * | 2016-08-05 | 2018-10-09 | 中国商用飞机有限责任公司 | aircraft cabin noise suppression system and method |
| CN106647346A (en) * | 2016-09-26 | 2017-05-10 | 郑州云海信息技术有限公司 | Electronic noise reduction system control method and device |
| CN107484076B (en) * | 2017-09-25 | 2021-04-13 | 联想(北京)有限公司 | Noise reduction control method and electronic equipment |
| CN108174325A (en) * | 2017-12-25 | 2018-06-15 | 广州市尊浪电器有限公司 | Automobile audio adjusting method and device |
| CN108551623A (en) * | 2018-05-15 | 2018-09-18 | 上海博泰悦臻网络技术服务有限公司 | Vehicle and its audio based on voice recognition play adjusting method |
| CN109166567A (en) * | 2018-10-09 | 2019-01-08 | 安徽信息工程学院 | A kind of noise-reduction method and equipment |
| CN109697971B (en) * | 2018-12-28 | 2021-04-13 | 西南交通大学 | Plasma-based automobile noise reduction system and method |
| CN110111764B (en) * | 2019-05-13 | 2021-12-07 | 广州小鹏汽车科技有限公司 | Vehicle and noise reduction method and noise reduction device thereof |
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Address after: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee after: Yundu New Energy Automobile Co.,Ltd. Address before: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee before: FJ MOTOR GROUP, YUDO NEW-ENERGY AUTOMOBILE Co.,Ltd. Address after: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee after: Yundu New Energy Vehicle Co.,Ltd. Address before: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee before: Yundu New Energy Automobile Co.,Ltd. |