CN110509936A - A kind of train lightweight denoising structure determines method and relevant apparatus - Google Patents
A kind of train lightweight denoising structure determines method and relevant apparatus Download PDFInfo
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- CN110509936A CN110509936A CN201910828542.0A CN201910828542A CN110509936A CN 110509936 A CN110509936 A CN 110509936A CN 201910828542 A CN201910828542 A CN 201910828542A CN 110509936 A CN110509936 A CN 110509936A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The application discloses a kind of train lightweight denoising structure and determines method and relevant apparatus, and the noise source obtained outside vehicle determines denoising structure to the contribution amount result of internal car noise, noise source strength, top layer noise objective, sound quality index and lightweight index.The sound pressure level for making the denoising structure finally determined meet interior target position under the constraint of top layer noise objective is not higher than the requirement for presetting sound pressure level, guarantees that noise sound is lower in the working environment for taking environment and driver and conductor of passenger；Noise structure is determined with contribution amount result, noise source strength and lightweight index, size and noise source strength for contribution amount result targetedly adjust structural parameters, the structure of high quality is respectively provided with without each panel, it realizes that effective distribution of structure meets the requirement of lightweight index, avoids bringing burden hidden danger to train operating safety；Sound quality index makes denoising structure meet the comfort demand of internal car noise, promotes passenger and driver and conductor's experience.
Description
Technical field
This application involves vehicle noise reduction technology field, more particularly to a kind of train lightweight denoising structure determine method and
Relevant apparatus.
Background technique
With the fast development of rail traffic and being substantially improved for Vehicle Speed, train will not only guarantee safe height
It runs fastly, also to give the more good working environment of driver and conductor, create comfortable seating environment to passenger.
As the raising column internal car noise of speed is consequently increased, this directly influences the working environment of interior driver and conductor
Environmental amenity is taken with passenger.Usually, internal car noise is mainly influenced by pass-by noise source, therefore can be passed through
Increase denoising structure in car body and carry out noise source outside runner wagon, reduces internal car noise.The quality of the usually interior denoising structure used
Bigger, sound insulation effect is better.But the increase of train weight also can bring burden and hidden danger to train operating safety.
Summary of the invention
Based on the above issues, this application provides a kind of train lightweight denoising structures to determine method and relevant apparatus, mentions
Lifting is made an uproar the validity of topology layout, to realize train noise reduction effect with lighter quality, improve passenger seating environment and
The working environment of driver and conductor.
The embodiment of the present application discloses following technical solution:
In a first aspect, the application, which provides a kind of train lightweight denoising structure, determines method, comprising:
The noise source outside vehicle is obtained to the contribution amount result and noise source strength of internal car noise；
It is true using the contribution amount result, the noise source strength, top layer noise objective, sound quality index and lightweight index
Determine denoising structure；The top layer noise objective includes: that the sound pressure level of interior target position is not higher than default sound pressure level.
Optionally, the contribution amount result includes: contribution amount result of the noise source to internal car noise of different frequency range；With
And the noise source outside vehicle passes through car body different panels to the contribution amount result of internal car noise；The panel includes following at least one
Kind:
Roof, side window, side wall or floor.
Optionally, it is described using the contribution amount result, the noise source strength, top layer noise objective, sound quality index and
Lightweight index determines denoising structure, specifically includes:
Contribution amount result and the top layer noise objective according to the noise source of the different frequency range to internal car noise, needle
The type of corresponding denoising structure is chosen to the noise source of different frequency range；
Pass through contribution amount result, the noise source of the car body different panels to internal car noise according to the noise source outside the vehicle
Intensity, the top layer noise objective and the lightweight index, determine the parameter and point of addition of the denoising structure；
Judge whether the voice signal of the target position meets the sound quality index, if it is, by the noise reduction
Type, parameter and the point of addition output of structure；If it is not, then according to the sound quality index to the parameter of the denoising structure
And/or point of addition is adjusted.
Optionally, before whether the voice signal for judging the target position meets the sound quality index, institute
State method further include:
Training obtains sound quality evaluation model；
Whether the voice signal for judging the target position meets the sound quality index, specifically includes:
Using the voice signal of the target position as the input of the sound quality evaluation model, obtains the sound quality and comment
The sound quality evaluation result of valence model；
Judge whether the sound quality evaluation result meets the sound quality index.
Optionally, method further include: the interior multiple positions of judgement be transferred to the maximum sound pressure level of the target position with most
Whether the difference of small sound pressure level is greater than preset threshold, if it is, being adjusted to the denoising structure.
Optionally, method further include:
Track to the train of the production and operation variation of determining noise source；The train is according to the denoising structure group
It fills；
The denoising structure is adjusted according to the noise source of variation.
Optionally, method further include: determine influence of noise area；
The determining denoising structure, specifically includes:
Denoising structure is determined in the influence of noise area.
Second aspect, the application provide a kind of train lightweight denoising structure determining device, comprising:
Data acquisition module, for obtaining the noise source outside vehicle to the contribution amount result and noise source strength of internal car noise；
Structure determination module, for utilizing the contribution amount result, the noise source strength, top layer noise objective, sound quality
Index and lightweight index determine denoising structure；The top layer noise objective includes: that the sound pressure level of interior target position is not higher than
Default sound pressure level.
Optionally, the contribution amount result includes: contribution amount result of the noise source to internal car noise of different frequency range；With
And the noise source outside vehicle passes through car body different panels to the contribution amount result of internal car noise；The panel includes following at least one
Kind:
Roof, side window, side wall or floor.
Optionally, the structure determination module, specifically includes:
Frequency-division section noise control unit, for the contribution amount result according to the noise source of the different frequency range to internal car noise
And the top layer noise objective, the type of corresponding denoising structure is chosen for the noise source of different frequency range；
Denoising structure determination unit, for passing through car body different panels to internal car noise according to the noise source outside the vehicle
Contribution amount result, the noise source strength, the top layer noise objective and the lightweight index, determine the denoising structure
Parameter and point of addition；
Denoising structure optimizes unit, refers to for judging whether the voice signal of the target position meets the sound quality
Mark, it is when the voice signal meets the sound quality index, the type, parameter and point of addition of the denoising structure is defeated
Out；When the voice signal is unsatisfactory for the sound quality index, according to the sound quality index to the ginseng of the denoising structure
Several and/or point of addition is adjusted.
Optionally, device further include:
Model obtains module, obtains sound quality evaluation model for training；
The denoising structure optimizes unit, specifically for commenting the voice signal of the target position as the sound quality
The input of valence model obtains the sound quality evaluation result of the sound quality evaluation model；Judging the sound quality evaluation result is
It is no to meet the sound quality index, when the sound quality evaluation result meets the sound quality index, by the denoising structure
Type, parameter and point of addition output；When the sound quality evaluation result is unsatisfactory for the sound quality index, according to described
Sound quality index is adjusted the parameter and/or point of addition of the denoising structure.
Optionally, device further include:
Etc. sound pressure levels optimization module, for judge interior multiple positions be transferred to the maximum sound pressure level of the target position with
Whether the difference of minimal sound pressure levels is greater than preset threshold, when the difference of the maximum sound pressure level and the minimal sound pressure levels is greater than default threshold
When value, the denoising structure is adjusted.
Optionally, device further include:
Noise source changes determining module, for track to the train of the production and operation variation of determining noise source；It is described
Train is to be assembled according to the denoising structure；
Optimization module is tracked, for being adjusted according to the noise source of variation to the denoising structure.
Optionally, device further include:
Influence of noise area determining module, for determining influence of noise area；
The structure determination module is specifically used for determining denoising structure in the influence of noise area.
Compared to the prior art, the application has the advantages that
Train lightweight denoising structure provided by the present application determines method and relevant apparatus, needs to obtain making an uproar outside vehicle first
Contribution amount result and noise source strength of the sound source to internal car noise；Thereafter using noise source to the contribution amount result of internal car noise,
Noise source strength, top layer noise objective, sound quality index and lightweight index determine denoising structure.In the constraint of top layer noise objective
Under, the sound pressure level that the denoising structure finally determined can be made to meet interior target position is not higher than the requirement for presetting sound pressure level, from
And guarantee that noise sound is lower in the working environment for taking environment and driver and conductor of passenger；With noise source to internal car noise
Contribution amount result, noise source strength and lightweight index determine noise structure, can be directed to the size and noise of contribution amount result
Source strength targetedly adjusts structural parameters, and the structure of high quality is respectively provided with without each panel, realizes effective distribution of structure,
To meet the requirement of lightweight index, avoid bringing burden and hidden danger to train operating safety；Sound quality index can then make to drop
Structure of making an uproar meets the comfort demand of internal car noise, promotes the experience of passenger and driver and conductor.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the flow chart that a kind of train lightweight denoising structure provided by the embodiments of the present application determines method；
Fig. 2 is a kind of distribution of noise sources schematic diagram provided by the embodiments of the present application；
Fig. 3 is a kind of test schematic diagram of the assessment pass-by noise source that provides of present application example to the internal car noise zone of influence；
Fig. 4 is that a kind of pass-by noise provided by the embodiments of the present application is transmitted to the transmission path schematic diagram in bullet train；
Fig. 5 is contribution amount knot of the pass-by noise source provided by the embodiments of the present application by car body different panels to internal car noise
Fruit schematic diagram；
Fig. 6 is the sound pressure levels noise control schematic illustration such as a kind of provided by the embodiments of the present application；
Fig. 7 is the flow chart that another train lightweight noise structure provided by the embodiments of the present application determines method；
Fig. 8 is the schematic diagram that a kind of pair of noise provided by the embodiments of the present application carries out frequency-division section control；
Fig. 9 is a kind of double layer hollow sandwich structure schematic diagram of sound insulation provided by the embodiments of the present application；
Figure 10 is the clunk management process of life cycle management；
Figure 11 is a kind of structural schematic diagram of train lightweight denoising structure determining device provided by the embodiments of the present application.
Specific embodiment
Current train noise-reduction method is usually to ask after train composition determination and being completed according to its noise is excessive
Topic, takes subsequent some noise reduction measures, such as increase acoustic damping materials in vehicle body.Carrying out structural modification again at this time is to compare
It is unpractical, the normal operation of train line is on the one hand influenced, the quality and noise reduction of balance and noise reduction structure are on the other hand difficult to
Validity.The quality of the usually interior denoising structure used is bigger, better to the sound insulation effect in pass-by noise source.But train matter
The increase of amount also can bring burden and hidden danger to train operating safety.
In view of the above-mentioned problems, inventor provides a kind of train lightweight denoising structure after study determines method and related dress
It sets, the denoising structure of clear train, promotes the validity of denoising structure layout before train assembling, thus after train assembling
Train noise reduction effect is realized with lighter quality, improves the working environment of the seating environment and driver and conductor of passenger.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment of the method one
Referring to Fig. 1, which is the process that a kind of train lightweight denoising structure provided by the embodiments of the present application determines method
Figure.
As shown in Figure 1, train lightweight denoising structure provided in this embodiment determines method, comprising:
Step 101: obtaining the noise source outside vehicle to the contribution amount result and noise source strength of internal car noise.
In practical applications, internal car noise mainly by vehicle outside noise source generate.In order to give train lightweight denoising structure
Determine data foundation be provided, it is right first in the present embodiment to be preferably determined for compliance with the denoising structure of lightweight noise reduction demand
Noise source is researched and analysed on train line.
Bullet train is high-speed cruising near the ground in orbit, and the noise that when train high-speed cruising generates is mainly that wheel track is made an uproar
Sound, aerodynamic noise, pantograph noise and noise of equipment.Wherein, aerodynamic noise includes that headstock aerodynamic noise, car body surface are pneumatic again
Noise and workshop coupling part aerodynamic noise.
Fig. 2 is a kind of distribution of noise sources schematic diagram provided by the embodiments of the present application.It is by Fig. 2 it can be seen that different types of
Substantially distributing position of the pass-by noise source in train exterior.
Fig. 3 is a kind of test schematic diagram of the assessment pass-by noise source that provides of present application example to the internal car noise zone of influence.
The top half of Fig. 3 is train side view, and lower half portion is train top cross-sectional view.The abscissa of Fig. 3 indicates length over ends of body, and
A test point is being arranged along vehicle body longitudinal direction interval 1m or so, and ordinate indicates interior sound pressure level.According to following two original
Then delimit pantograph and the wheel-rail noise zone of influence:
(1) there is apparent continuous downward trend in internal car noise；
(2) sound pressure level reduces 3dB (A) or more than Sound Source Center position, i.e., acoustic energy reduces by 50%.
Can be seen that pantograph noise mainly from the example of Fig. 3 influences 1~No. 8 measuring point range, wheel-rail noise coverage
About 20-26 measuring point range.That is, 1~No. 8 measuring point range and 20~No. 26 measuring point ranges can be determined as making an uproar
The sound zone of influence.
It is subsequent can Fig. 3 determine influence of noise area in, according to the present processes, according to noise source, frequency and tribute
The difference etc. for degree of offering carries out denoising structure design.
It should be noted that step 101 can be the acquisition of progress data and data point on existing train in the present embodiment
What analysis obtained.In practical application, Transfer path analysis is carried out by the internal car noise to existing vehicle, it is available to be passed from structure
It is delivered to the contribution amount of internal car noise.
Pass-by noise is transmitted to the transmission path in bullet train as shown in figure 4, mainly from vibration radiation sound and transmission
Sound.Vibrational energy is transferred to car by body construction by the vibrational excitation of bogie and equipment, and then excitation structure is vibrated,
Generate vibration radiation sound.Transmission sound is the aerodynamic noise of car body surface through car body section, is transmitted to the noise of interior generation.Also
Some is direct sound wave, direct sound wave be the noise of the in-vehicle devices such as air-conditioning be directly delivered to it is interior form noise, such as from sky
It recalls air port and is transmitted to interior noise.
As a possible implementation, operating condition Transfer path analysis (Operational can use in the present embodiment
Transfer Path Analysis, OTPA) method analyzes the transmission path of the internal car noise of bullet train.It is specific real
Now, coupled noise is removed using correlation analysis, is then adopted with the multiple vibration measuring points of Bus inner layout and noise measuring point outside vehicle
The contribution amount analysis result for obtaining internal car noise with OTPA method is as shown in Figure 5.Fig. 5 is to make an uproar outside vehicle provided by the embodiments of the present application
Sound source is by car body different panels to the contribution amount result schematic diagram of internal car noise.In the present embodiment, panel may include but not
Be limited to it is following any one:
Roof, side window, side wall or floor.
It the setting position of measuring point can be inside and outside roof, inside and outside side window, inside and outside inside and outside side wall and floor.In addition, may be used also
To be arranged in target position.As an example, target position can be somebody's turn to do with the position of 1.2m height on floor in a vehicle referring to Fig. 6
Position R is used as target position in figure.Measuring point outside vehicle can be used to obtain acoustical signal, analyze these acoustical signals by processing
Obtain noise source strength.
It should be noted that exemplary only contribution amount shown in Fig. 5 is as a result, can see the exemplary scene by Fig. 5
The large percentage for contributing internal car noise by roof down occupies 34%, and contributes internal car noise by side wall, side window or floor
Ratio is then relatively small.
It should be noted that the noise source outside vehicle can not only pass through the shape of different panels to the contribution amount result of internal car noise
(such as Fig. 5) is presented in formula, can be presented in a manner of different frequency range.For ease of understanding, illustrate below by way of example.As
Example, the contribution amount result of the noise source of different frequency range to internal car noise are as follows: the contribution amount of the first frequency range is 40%, the second frequency range
Contribution amount be 35%, the contribution amount of third frequency range is 25%.Wherein, the first frequency range, the second frequency range and third frequency range do not weigh mutually
It closes.
In the present embodiment, for noise source to the appearance form of the contribution amount result of internal car noise without limiting.
Step 102: utilizing the contribution amount result, the noise source strength, top layer noise objective, sound quality index and light weight
Change index and determines denoising structure.
Firstly, introducing top layer noise objective in the present embodiment.Top layer noise objective includes: the sound pressure level of interior target position
Not higher than default sound pressure level.The purpose that top layer noise objective is arranged is to guarantee target location in the denoising structure for determining train
Sound pressure level be not higher than default sound pressure level.Once the sound pressure level of target position is higher than default sound pressure level, then it represents that target position
Sound pressure level is excessively high, if not optimizing adjustment to structure is easy to cause that noise is excessive, noise jamming to passenger and driver and conductor
Too strong impression.By taking Fig. 5 as an example, top layer noise objective includes: the sound pressure level of target position R not higher than contract limit value or internal control
Value.That is, default sound pressure level can be contract limit value or interior control value to interior sound pressure level.
In addition, introducing sound quality index in the present embodiment.Sound quality index can be the form of score or grade.Sound quality
The many aspects such as loudness, sharpness, roughness and the semantic clarity of noise can be specifically embodied in.Sound quality index is set
Purpose is to guarantee that the comfort level of internal car noise is met the requirements in the denoising structure for determining train, to guarantee that passenger and Si multiply people
The comfort of member.
Then, lightweight index in the present embodiment is introduced.In the concrete realization, lightweight index can be with the total of denoising structure
It is of low quality in preset quality, the surface density for being also possible to denoising structure is no more than default surface density.Lightweight index is set
Purpose is that guarantee is smaller by denoising structure quality in the denoising structure for determining train, is avoided due to the quality of denoising structure is excessive
Burden and hidden danger are brought to train operating safety.
It has been already mentioned that contribution amount result, which specifically can be the noise source outside vehicle, passes through car body in the realization description of back
Contribution amount result of the different panels to internal car noise.As an example, to meet above-mentioned strong quantizating index, can to contribution amount compared with
Biggish thickness is arranged in the corresponding denoising structure of big panel；The corresponding denoising structure setting of the lesser panel of contribution amount is lesser
Thickness.By taking contribution amount result shown in fig. 5 as an example, in denoising structure, relative to side wall, side window or floor, it is arranged in roof
Thicker denoising structure.To avoid the waste of quality from (the excessive denoising structure of quality being unnecessarily arranged, but gives car body
Cause unnecessary burden).Therefore, light weight of the contribution amount result that lightweight index and back obtain for denoising structure
Changing design has important directive significance.The quantitative analysis of contribution amount can make denoising structure design more have specific aim.
In practical application, the decrease of noise functions of denoising structure indicates that oise insulation factor is bigger, noise reduction with oise insulation factor (unit: dB)
The noise reduction effect of structure is more significant.In the case where noise source strength is constant, oise insulation factor is bigger, and interior sound pressure level is smaller；Sound insulation
Measure it is constant in the case where, noise source strength is bigger, and interior sound pressure level is bigger.Therefore, the noise source strength that back obtains is for noise reduction
The specific setting of structure has directive significance.
It should be noted that in the present embodiment, needing while meeting lightweight index, top for the design of denoising structure
Layer noise objective and sound quality index, thus from the denoising structure of multiple dimensions control train make its quality, noise reduction effect with
And the sound quality after noise reduction can satisfy requirement.Appoint when having in lightweight index, top layer noise objective and sound quality index
When meaning one is unsatisfactory for, it is required to that the denoising structure of current design is adjusted and is optimized.Specifically adjustment and optimal way
It may is that the type of replacement denoising structure, adjustment structural thickness, change denoising structure setting position or setting range etc..Herein
Without limiting.Finally determining noise structure is while meeting the denoising structure of above-mentioned three indexs.
Above it is that train lightweight denoising structure provided by the present application determines method, needs to obtain the noise outside vehicle first
Contribution amount result and noise source strength of the source to internal car noise；Thereafter using noise source to the contribution amount result of internal car noise, make an uproar
Sound source is strong, top layer noise objective, sound quality index and lightweight index determine denoising structure.In the constraint of top layer noise objective
Under, the sound pressure level that the denoising structure finally determined can be made to meet interior target position is not higher than the requirement for presetting sound pressure level, from
And guarantee that noise sound is lower in the working environment for taking environment and driver and conductor of passenger；With noise source to internal car noise
Contribution amount result, noise source strength and lightweight index determine noise structure, can be directed to the size and noise of contribution amount result
Source strength targetedly adjusts structural parameters, and the structure of high quality is respectively provided with without each panel, realizes effective distribution of structure,
To meet the requirement of lightweight index, avoid bringing burden and hidden danger to train operating safety；Sound quality index can then make to drop
Structure of making an uproar meets the comfort demand of internal car noise, promotes the experience of passenger and driver and conductor.
In practical applications, can also based on the noise source outside vehicle to the contribution amount of internal car noise as a result, according to noise source
Frequency determines corresponding denoising structure.Therefore, a kind of train lightweight denoising structure is further provided for herein determines method, below
The specific implementation of this method is illustrated with attached drawing in conjunction with the embodiments.
Embodiment of the method two
Referring to Fig. 7, which is the stream that another train lightweight noise structure provided by the embodiments of the present application determines method
Cheng Tu.
As shown in fig. 7, train lightweight noise structure provided in this embodiment determines method, comprising:
Step 701: obtaining the noise source outside vehicle to the contribution amount result and noise source strength of internal car noise.
The present embodiment step 701 and the implementation of previous embodiment step 101 are essentially identical, before associated description can refer to
Embodiment is stated, will not be repeated here herein.
Step 702: being made an uproar according to the noise source of the different frequency range to the contribution amount result of internal car noise and the top layer
Sound index chooses the type of corresponding denoising structure for the noise source of different frequency range.
In the present embodiment, contribution amount result includes: contribution amount result of the noise source to internal car noise of different frequency range；With
And the noise source outside vehicle passes through car body different panels to the contribution amount result of internal car noise.It, can be with according to the former in the present embodiment
Interior noise spectrum characteristics is obtained, thus the type of the corresponding denoising structure of the noise source for choosing different frequency range.
Referring to Fig. 8, which is the schematic diagram that a kind of pair of noise provided by the embodiments of the present application carries out frequency-division section control.Fig. 8
In, abscissa is the frequency (unit: Hz) of noise source, and ordinate is noise source strength (unit: dB).Broken line in Fig. 8 indicates vehicle
The frequency of outer various sources and corresponding noise source strength, are observed that noise spectrum characteristics from the figure.Using Fig. 8 as example,
Noise spectrum is divided into 4 sections in the present embodiment, be 80Hz or less, 80~250Hz, 250~1250Hz and 1250Hz respectively with
On.For different structure, this frequency range divides can be variant.
(1) it is directed to the noise of 80Hz or less frequency range:
For the noise of this frequency range, using modal control method.The noise reduction measure taken for this band noise is specifically
Car body rigidity is improved, optimizes body construction, to reduce the Oscillation Amplitude of car body.
(2) it is directed to the noise of 80~250Hz frequency range:
For the noise of this frequency range, using vibration control method.By spraying damping, optimize the measures such as damper parameter,
The noise for inhibiting body construction vibration and being passed over from car body.It, can be in car body type as illustrative specific implementation
Material lumen loading damping material vibrates biggish region surface in bogie area, pantograph area etc. and sprays damping slurry；To vibration compared with
Big equipment (such as air compressor machine, motor cooling blower etc.) uses shock-absorbing mounting structure；Interior structure uses constructional element with spring.
(3) it is directed to the noise of 250~1250Hz frequency range:
For the noise of this frequency range, using sound insulation control method.Mainly using body profile sound insulation optimization and double layer hollow
The sound insulation of sandwich designs, and reduces the airborne noise passed over outside vehicle.The sound insulation of floor section, car body section and side wall section
Design all uses the double layer hollow sandwich structure of body profile and trim panel, and what centre used is all to have heat-insulated and flame retardant property
Sound-absorbing material.Aforementioned double layer hollow sandwich structure is referring to Fig. 9.
(4) for 1250Hz with the noise of super band:
For the noise of this frequency range, using sound insulation+sound absorption control method.Sound insulation control method aforementioned (3) point has been retouched
It states, it is main herein to introduce sound absorption control.In practical applications, it can be set using the perforation sound absorptions such as trim panel and novel Sound absorption chair
Meter carries out sqouynd absorption lowering noise to passenger compartment noise, and Sound absorption chair can reduce by 1~2dB of internal car noise.
By the noise control of frequency-division section, promote the noise source highly controllable of various frequency ranges, convenient for subsequent each to meet
The structural adjustment carried out when item index.It is precisely controlled to be able to carry out to different frequency difference noise source, reduces repetitive structure,
Improve the Energy Efficiency Ratio of denoising structure.
Step 703: contribution amount result, institute according to the noise source outside the vehicle by car body different panels to internal car noise
Noise source strength, the top layer noise objective and the lightweight index are stated, determines the parameter and addition of the denoising structure
Position.
On the basis of previous step has determined that the denoising structure type for the selection of each band noise, the ginseng of denoising structure
There are also to be determined with point of addition for number.Wherein, the parameter of denoising structure can include but is not limited to following at least one: material or
Thickness.For this purpose, also needing to execute parameter and point of addition of this step to determine denoising structure.This step in specific implementation, can
To use statistical power method software VA One.The parameter and point of addition for executing the denoising structure that this step determines are only preliminary true
It is fixed as a result, only can satisfy top layer noise objective and lightweight index.But whether it meets sound quality index and need
It determines, it is therefore desirable to further execute step 704.
Step 704: judging whether the voice signal of the target position meets the sound quality index, if it is, holding
Row step 705；If not, thening follow the steps 706.
Before the execution of this step, it can train in advance and obtain sound quality evaluation model.The model can be according to input
The many aspects (such as loudness, sharpness, roughness, semantic clarity etc.) of voice signal carry out sound quality to the voice signal
Scoring, obtains sound quality appraisal result.For those skilled in the art, sound quality evaluation model how to be trained to belong to comparative maturity
Technology, therefore herein to the training process of model without limit.
When this step executes, specifically it can be the collected voice signal of measuring point of target location setting as described in
The input of sound quality evaluation model obtains the sound quality evaluation result of the sound quality evaluation model.Judge that the sound quality is commented
Whether valence result meets the sound quality index.
As an example it is supposed that sound quality evaluation result is 88 points, and sound quality index is 85 points, then the sound of target position
Signal meets the sound quality index, i.e., current denoising structure meet three indexs (top layer noise objective, lightweight index and
Sound quality index), step 705 can be performed；Assuming that sound quality evaluation result is 75 points, and sound quality index is 85 points, then target
The voice signal of position is unsatisfactory for the sound quality index, needs to be implemented step 706.
As an example it is supposed that sound quality evaluation result is that (level-one sound quality is best, and three-level sound quality is most for level-one or second level
Difference), and sound quality index is second level, then the voice signal of target position meets the sound quality index, i.e., current noise reduction knot
Structure meets three indexs (top layer noise objective, the lightweight index harmony index of quality), and step 705 can be performed；Assuming that sound quality
Evaluation result is three-level, and sound quality index is second level, then the voice signal of target position is unsatisfactory for the sound quality index, is needed
Execute step 706.
Step 705: the type, parameter and point of addition of the denoising structure are exported.
After type, parameter and the point of addition output of denoising structure, vehicle assembling can be carried out according to the denoising structure,
Obtain the train of noise reduction effect meet demand.
Step 706: being adjusted according to parameter and/or point of addition of the sound quality index to the denoising structure.
After the adjustment for carrying out parameter and/or point of addition, 704 are re-execute the steps, is with the denoising structure that determination is current
The no requirement for meeting sound quality index.It is understood that not for lightweight index and/or top layer noise reduction index after avoiding adjustment
Meet again, lightweight index can also be verified after the adjustment and whether top layer noise reduction index meets.
In summary it describes, the denoising structure finally exported is the denoising structure of three indexs while satisfaction.With sound product
Matter index as determine denoising structure important indicator, can when car sound comfort more meet people's (passenger or driver and conductor)
Subjective feeling.
In the embodiment of the present application, when designing denoising structure using the clunk management of life cycle management.It carries out below detailed
Thin description.Referring to Figure 10, which is the clunk management process of life cycle management.
The first step carries out product programming, the i.e. planning of train composition.In the process, it needs to formulate top layer noise objective,
And the top layer noise objective is decomposed based on noise Simulation, top layer noise objective is decomposed into each compartment and body portions
Part.To carry out denoising structure design respectively to each compartment and body part, so that vehicle meets the top layer noise objective.
Second step carries out conceptual design, specifically, carries out test and type selecting, moving party to the material of various denoising structures
Case simultaneously formulates governing plan.
Third step, technology and detail design.Component sound insulation measurement and damping test are carried out, equipment acoustical power is commented
Estimate, the anti-acoustic capability of vehicle is assessed.Obtain train design drawing.
4th step carries out the manufacturing of train.Measure existing vehicle oise insulation factor, interior reverberation and vibration transmissibility.
5th step, operation tracking, carries out the analysis of car body profile scanning and Transfer path analysis, knows to noise source
Not.
Pass through the clunk management process of life cycle management shown in Fig. 10, it is known that setting for noise structure in the present embodiment
It is calculated as Top-Down Design process.
The step for below with reference to the 5th step of the clunk management process of life cycle management, i.e. operation tracking, to aforementioned reality
The train lightweight noise structure for applying example offer determines that the application of method carries out extension elaboration.
In the present embodiment, when the type, parameter and point of addition of the denoising structure exported using step 705 carry out vehicle group
After dress, this method is also further executed:
Step 707: track to the train of the production and operation variation of determining noise source.
Because using, noise source may change train after actual operation.As an example, wheel-rail wear and tear is led
The out-of-roundness variation of train wheel is caused, and then noise source strength changes.In this case, originally based on noise source before
Denoising structure that is strong and designing may be poor to present noise source strong adaptability, leads to top layer noise objective and/or sound quality
Index no longer meets, and it is necessary to implement steps 708 at this time is adjusted denoising structure.
Step 708: the denoising structure being adjusted according to the noise source of variation.
It, can be based on the specific adjustment of various considerations when being adjusted to denoising structure.For example, making an uproar according to variation
The variation of its frequency of sound source, the noise control mode for carrying out corresponding band to the noise are adjusted.For example, making an uproar according to variation
Its noise transmission path of sound source determines the panel for transmitting the noise, increases denoising structure in corresponding panel.For example, if making an uproar
The variation of sound source causes sound quality result to be unsatisfactory for sound quality index, then is adjusted to denoising structure based on this so that after noise reduction
Sound quality result meets sound quality index.
Based on abovementioned steps 707 and 708 it is found that due to being to carry out life cycle management to train to make an uproar in the embodiment of the present application
Sound pipe reason, is also carrying out operation tracking especially after train operation, so even noise source changes after operation, also can
It takes appropriate measures in time and noise structure is adjusted.Different from receiving the passive tune carried out after the excessive feedback of noise
It is whole, the experience for being able to ascend passenger and driver and conductor is timely adjusted in the present embodiment to the active of noise structure.
In addition, being car body inner wall for the harmony for promoting each noise direction of transfer passing noise in practical applications
Sound pressure level is evenly distributed, the present embodiment carry out noise control when use etc. sound pressure levels principle.Explanation developed below.
Referring to Fig. 6, which is the sound pressure levels noise control schematic illustration such as a kind of provided by the embodiments of the present application.In Fig. 6
S1~S6 is six different measuring points of car body inner wall setting respectively.Obviously, from each measuring point of S1~S6 to target position R's
Noise transmission path is different.Range difference due to each measuring point distance objective position R in this six measuring points is not away from being
Very big, therefore, for sound pressure levels principles such as satisfactions, the sound pressure level difference that each measuring point is transferred to target position R should not be very big.
For this purpose, denoising structure provided in this embodiment determines method further include:
Judge interior multiple positions be transferred to the target position maximum sound pressure level and minimal sound pressure levels difference it is whether big
In preset threshold, if it is, being adjusted to the denoising structure.
As an example, preset threshold can be 3dB, if the difference of maximum sound pressure level and minimal sound pressure levels is greater than 3dB, that is, table
Show and the sound pressure levels principle such as be unsatisfactory for, the harmony to the denoising structure of car body is needed to be adjusted.For example, the sound pressure level of S3 is
The sound pressure level of 58dB, S1 are 61dB, under the premise of meeting top layer noise objective requirement at R, then can will setting with S3 near
Denoising structure cancel a part, and correspondingly, be added to the oise insulation factor that denoising structure at S1 is promoted at S1.In this way, S3
Sound pressure level improves, and the sound pressure level of S1 reduces, thus the sound pressure levels principle such as satisfaction.According to etc. sound pressure levels principle can contribute to economy
And efficiently realize noise equalization control.
The train lightweight denoising structure provided based on previous embodiment determines method, and correspondingly, the application also provides one
Kind train lightweight denoising structure determining device.The specific implementation of the device is described below with reference to embodiment and attached drawing and
Explanation.
Installation practice
Referring to Figure 11, which is a kind of structure of train lightweight denoising structure determining device provided by the embodiments of the present application
Schematic diagram.
As shown in figure 11, which includes: data acquisition module 111 and structure determination module 112；
Wherein, data acquisition module 111, for obtaining the noise source outside vehicle to the contribution amount result of internal car noise and making an uproar
Sound source is strong；
Structure determination module 112, for utilizing the contribution amount result, the noise source strength, top layer noise objective, sound product
Matter index and lightweight index determine denoising structure；The top layer noise objective includes: that the sound pressure level of interior target position is not high
In default sound pressure level.
It is above train lightweight denoising structure determining device provided by the present application.In the constraint of top layer noise objective
Under, the sound pressure level that the denoising structure finally determined can be made to meet interior target position is not higher than the requirement for presetting sound pressure level, from
And guarantee that noise sound is lower in the working environment for taking environment and driver and conductor of passenger；With noise source to internal car noise
Contribution amount result, noise source strength and lightweight index determine noise structure, can be directed to the size and noise of contribution amount result
Source strength targetedly adjusts structural parameters, and the structure of high quality is respectively provided with without each panel, realizes effective distribution of structure,
To meet the requirement of lightweight index, avoid bringing burden and hidden danger to train operating safety；Sound quality index can then make to drop
Structure of making an uproar meets the comfort demand of internal car noise, promotes the experience of passenger and driver and conductor.
As a kind of possible implementation, the contribution amount result includes: the noise source of different frequency range to internal car noise
Contribution amount result；And the noise source outside vehicle passes through car body different panels to the contribution amount result of internal car noise；The panel
It comprises at least one of the following:
Roof, side window, side wall or floor.
As a kind of possible implementation, the structure determination module 112 is specifically included: frequency-division section noise control list
Member, denoising structure determination unit and denoising structure optimize unit.
Wherein, frequency-division section noise control unit, the contribution for the noise source according to the different frequency range to internal car noise
Result and the top layer noise objective are measured, the type of corresponding denoising structure is chosen for the noise source of different frequency range；Pass through
The noise control of frequency-division section promotes the noise source highly controllable of various frequency ranges, convenient for subsequent to meet indices when progress
Structural adjustment.It is precisely controlled to be able to carry out to different frequency difference noise source, reduces repetitive structure, improve denoising structure
Energy Efficiency Ratio.
Denoising structure determination unit, for passing through car body different panels to internal car noise according to the noise source outside the vehicle
Contribution amount result, the noise source strength, the top layer noise objective and the lightweight index, determine the denoising structure
Parameter and point of addition；
Denoising structure optimizes unit, refers to for judging whether the voice signal of the target position meets the sound quality
Mark, it is when the voice signal meets the sound quality index, the type, parameter and point of addition of the denoising structure is defeated
Out；When the voice signal is unsatisfactory for the sound quality index, according to the sound quality index to the ginseng of the denoising structure
Several and/or point of addition is adjusted.
As a kind of possible implementation, above-mentioned apparatus further include:
Model obtains module, obtains sound quality evaluation model for training；
The denoising structure optimizes unit, specifically for commenting the voice signal of the target position as the sound quality
The input of valence model obtains the sound quality evaluation result of the sound quality evaluation model；Judging the sound quality evaluation result is
It is no to meet the sound quality index, when the sound quality evaluation result meets the sound quality index, by the denoising structure
Type, parameter and point of addition output；When the sound quality evaluation result is unsatisfactory for the sound quality index, according to described
Sound quality index is adjusted the parameter and/or point of addition of the denoising structure.
As a kind of possible implementation, above-mentioned apparatus further include:
Etc. sound pressure levels optimization module, for judge interior multiple positions be transferred to the maximum sound pressure level of the target position with
Whether the difference of minimal sound pressure levels is greater than preset threshold, when the difference of the maximum sound pressure level and the minimal sound pressure levels is greater than default threshold
When value, the denoising structure is adjusted.
According to etc. sound pressure levels principle can contribute to economical and efficiently realize noise equalization control.
As a kind of possible implementation, above-mentioned apparatus further include:
Noise source changes determining module, for track to the train of the production and operation variation of determining noise source；It is described
Train is to be assembled according to the denoising structure；
Optimization module is tracked, for being adjusted according to the noise source of variation to the denoising structure.
Due to being the clunk management for carrying out life cycle management to train in the embodiment of the present application, especially after train operation
Operation tracking also is being carried out, so even noise source changes after operation, can also taken appropriate measures in time to noise
Structure is adjusted.Different from receiving the passive adjustment carried out after the excessive feedback of noise, to noise structure in the present embodiment
Active timely adjust the experience for being able to ascend passenger and driver and conductor.
Optionally, device further include: influence of noise area determining module, for determining influence of noise area；
The structure determination module 112 is specifically used for determining denoising structure in the influence of noise area.
By determining influence of noise area, it can be realized the design effectively to denoising structure, i.e., only influence of noise area set
Denoising structure is counted, rather than the zone of influence is then not necessarily to design denoising structure.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between same and similar part may refer to each other, each embodiment focuses on the differences from other embodiments.
For equipment and system embodiment, since it is substantially similar to the method embodiment, so describe fairly simple,
The relevent part can refer to the partial explaination of embodiments of method.Equipment and system embodiment described above is only schematic
, wherein unit may or may not be physically separated as illustrated by the separation member, as unit prompt
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.Some or all of the modules therein can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
Those of ordinary skill in the art can understand and implement without creative efforts.
The above, only a kind of specific embodiment of the application, but the protection scope of the application is not limited thereto,
Within the technical scope of the present application, any changes or substitutions that can be easily thought of by anyone skilled in the art,
Should all it cover within the scope of protection of this application.Therefore, the protection scope of the application should be with scope of protection of the claims
Subject to.
Claims (14)
1. a kind of train lightweight denoising structure determines method characterized by comprising
The noise source outside vehicle is obtained to the contribution amount result and noise source strength of internal car noise；
It is determined and is dropped using the contribution amount result, the noise source strength, top layer noise objective, sound quality index and lightweight index
It makes an uproar structure；The top layer noise objective includes: that the sound pressure level of interior target position is not higher than default sound pressure level.
2. the method according to claim 1, wherein the contribution amount result includes: the noise source of different frequency range
To the contribution amount result of internal car noise；And the noise source outside vehicle passes through car body different panels to the contribution amount knot of internal car noise
Fruit；The panel comprises at least one of the following:
Roof, side window, side wall or floor.
3. according to the method described in claim 2, it is characterized in that, it is described using the contribution amount result, the noise source strength,
Top layer noise objective, sound quality index and lightweight index determine denoising structure, specifically include:
Contribution amount result and the top layer noise objective according to the noise source of the different frequency range to internal car noise, for not
The type of corresponding denoising structure is chosen with the noise source of frequency range；
Contribution amount result, the noise source strength according to the noise source outside the vehicle by car body different panels to internal car noise
Degree, the top layer noise objective and the lightweight index, determine the parameter and point of addition of the denoising structure；
Judge whether the voice signal of the target position meets the sound quality index, if it is, by the denoising structure
Type, parameter and point of addition output；If it is not, then according to the sound quality index to the parameter of the denoising structure and/
Or point of addition is adjusted.
4. according to the method described in claim 3, it is characterized in that, the voice signal for judging the target position whether
Before meeting the sound quality index, the method also includes:
Training obtains sound quality evaluation model；
Whether the voice signal for judging the target position meets the sound quality index, specifically includes:
Using the voice signal of the target position as the input of the sound quality evaluation model, the sound quality evaluation mould is obtained
The sound quality evaluation result of type；
Judge whether the sound quality evaluation result meets the sound quality index.
5. the method according to claim 1, wherein further include: the interior multiple positions of judgement are transferred to the mesh
Whether the maximum sound pressure level of cursor position and the difference of minimal sound pressure levels are greater than preset threshold, if it is, to the denoising structure into
Row adjustment.
6. the method according to claim 1, wherein further include:
Track to the train of the production and operation variation of determining noise source；The train be according to the denoising structure assembling and
At；
The denoising structure is adjusted according to the noise source of variation.
7. the method according to claim 1, wherein further include: determine influence of noise area；
The determining denoising structure, specifically includes:
Denoising structure is determined in the influence of noise area.
8. a kind of train lightweight denoising structure determining device characterized by comprising
Data acquisition module, for obtaining the noise source outside vehicle to the contribution amount result and noise source strength of internal car noise；
Structure determination module, for utilizing the contribution amount result, the noise source strength, top layer noise objective, sound quality index
Denoising structure is determined with lightweight index；The top layer noise objective includes: the sound pressure level of interior target position not higher than default
Sound pressure level.
9. device according to claim 8, which is characterized in that the contribution amount result includes: the noise source of different frequency range
To the contribution amount result of internal car noise；And the noise source outside vehicle passes through car body different panels to the contribution amount knot of internal car noise
Fruit；The panel comprises at least one of the following:
Roof, side window, side wall or floor.
10. device according to claim 9, which is characterized in that the structure determination module specifically includes:
Frequency-division section noise control unit, for according to the noise source of the different frequency range to the contribution amount result of internal car noise and
The top layer noise objective, the type of corresponding denoising structure is chosen for the noise source of different frequency range；
Denoising structure determination unit, for passing through contribution of the car body different panels to internal car noise according to the noise source outside the vehicle
Result, the noise source strength, the top layer noise objective and the lightweight index are measured, determines the ginseng of the denoising structure
Several and point of addition；
Denoising structure optimizes unit, for judging whether the voice signal of the target position meets the sound quality index, when
When the voice signal meets the sound quality index, the type, parameter and point of addition of the denoising structure are exported；Work as institute
When stating voice signal and being unsatisfactory for the sound quality index, according to the sound quality index to the parameter of the denoising structure and/or
Point of addition is adjusted.
11. device according to claim 10, which is characterized in that further include:
Model obtains module, obtains sound quality evaluation model for training；
The denoising structure optimizes unit, specifically for evaluating mould for the voice signal of the target position as the sound quality
The input of type obtains the sound quality evaluation result of the sound quality evaluation model；Judge whether the sound quality evaluation result is full
The foot sound quality index, when the sound quality evaluation result meets the sound quality index, by the class of the denoising structure
Type, parameter and point of addition output；When the sound quality evaluation result is unsatisfactory for the sound quality index, according to the sound product
Matter index is adjusted the parameter and/or point of addition of the denoising structure.
12. device according to claim 8, which is characterized in that further include:
Etc. sound pressure levels optimization module, for judging that interior multiple positions are transferred to the maximum sound pressure level of the target position and minimum
Whether the difference of sound pressure level is greater than preset threshold, when the difference of the maximum sound pressure level and the minimal sound pressure levels is greater than preset threshold
When, the denoising structure is adjusted.
13. device according to claim 8, which is characterized in that further include:
Noise source changes determining module, for track to the train of the production and operation variation of determining noise source；The train
To be assembled according to the denoising structure；
Optimization module is tracked, for being adjusted according to the noise source of variation to the denoising structure.
14. device according to claim 8, which is characterized in that further include:
Influence of noise area determining module, for determining influence of noise area；
The structure determination module is specifically used for determining denoising structure in the influence of noise area.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111445894A (en) * | 2020-03-02 | 2020-07-24 | 北京航天晨信科技有限责任公司 | Noise reduction method for shelter |
| CN111723415A (en) * | 2020-06-15 | 2020-09-29 | 中科上声（苏州）电子有限公司 | Performance evaluation method and device of vehicle noise reduction system |
| CN114550740A (en) * | 2022-04-26 | 2022-05-27 | 天津市北海通信技术有限公司 | Voice definition algorithm under noise and train audio playing method and system thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0224165D0 (en) * | 2001-10-24 | 2002-11-27 | Lear Corp | Method of tuning acoustical absorption in a vehicle interior |
| CA2535294A1 (en) * | 2005-02-09 | 2006-08-09 | Hitachi, Ltd. | Heat insulating acoustical structure and carbody shell structure using the same |
| CN101654083A (en) * | 2008-08-22 | 2010-02-24 | 株式会社日立制作所 | Rail vehicle with sound-absorbing structure |
| JP2010083267A (en) * | 2008-09-30 | 2010-04-15 | Panasonic Corp | Noise reduction device |
| CN103175699A (en) * | 2011-12-23 | 2013-06-26 | 南车青岛四方机车车辆股份有限公司 | Noise transmission route testing method for railway vehicle |
| CN103578460A (en) * | 2012-07-19 | 2014-02-12 | 徐丰辰 | Vehicle damping noise reduction method |
| CN103630232A (en) * | 2013-10-29 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Noise source identifying and testing method for high speed train |
| CN107745721A (en) * | 2017-10-16 | 2018-03-02 | 中车唐山机车车辆有限公司 | EMUs Low Noise Design method |
| CN109141623A (en) * | 2018-08-14 | 2019-01-04 | 中车青岛四方机车车辆股份有限公司 | A kind of evaluation method and device of train in-vehicle sound quality |
-
2019
- 2019-09-03 CN CN201910828542.0A patent/CN110509936B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0224165D0 (en) * | 2001-10-24 | 2002-11-27 | Lear Corp | Method of tuning acoustical absorption in a vehicle interior |
| CA2535294A1 (en) * | 2005-02-09 | 2006-08-09 | Hitachi, Ltd. | Heat insulating acoustical structure and carbody shell structure using the same |
| CN101654083A (en) * | 2008-08-22 | 2010-02-24 | 株式会社日立制作所 | Rail vehicle with sound-absorbing structure |
| JP2010083267A (en) * | 2008-09-30 | 2010-04-15 | Panasonic Corp | Noise reduction device |
| CN103175699A (en) * | 2011-12-23 | 2013-06-26 | 南车青岛四方机车车辆股份有限公司 | Noise transmission route testing method for railway vehicle |
| CN103578460A (en) * | 2012-07-19 | 2014-02-12 | 徐丰辰 | Vehicle damping noise reduction method |
| CN103630232A (en) * | 2013-10-29 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Noise source identifying and testing method for high speed train |
| CN107745721A (en) * | 2017-10-16 | 2018-03-02 | 中车唐山机车车辆有限公司 | EMUs Low Noise Design method |
| CN109141623A (en) * | 2018-08-14 | 2019-01-04 | 中车青岛四方机车车辆股份有限公司 | A kind of evaluation method and device of train in-vehicle sound quality |
Non-Patent Citations (1)
| Title |
|---|
| 白海飞: "动车组噪声振动传递路径测试与分析", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111445894A (en) * | 2020-03-02 | 2020-07-24 | 北京航天晨信科技有限责任公司 | Noise reduction method for shelter |
| CN111723415A (en) * | 2020-06-15 | 2020-09-29 | 中科上声（苏州）电子有限公司 | Performance evaluation method and device of vehicle noise reduction system |
| CN111723415B (en) * | 2020-06-15 | 2024-02-27 | 中科上声（苏州）电子有限公司 | Performance evaluation method and device for vehicle noise reduction system |
| CN114550740A (en) * | 2022-04-26 | 2022-05-27 | 天津市北海通信技术有限公司 | Voice definition algorithm under noise and train audio playing method and system thereof |
| CN114550740B (en) * | 2022-04-26 | 2022-07-15 | 天津市北海通信技术有限公司 | Voice definition algorithm under noise and train audio playing method and system thereof |
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|---|---|
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