CN106504761A - A kind of intelligent noise of orientable noise reduction eliminates system - Google Patents
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Abstract
The invention discloses a kind of intelligent noise of orientable noise reduction eliminates system, it is related to noise reduction field.Including the audio perception device being built on equipment、Noise elimination subsystem、Sef-adapting filter、Sonification system and intelligent cloud platform beyond the clouds and with noise elimination subsystem radio communication is set，The continuous on-line/off-line of intelligent cloud platform collects the audio frequency of the various sound sources of storage，Filling audio repository，Carry out the identification parameter for building storehouse each noise like corresponding with training generation，Establish the counteracting factor of noise source，Noise elimination subsystem is acquired to the sound source of assigned direction by audio perception device，After to sound wave pretreatment，By being contrasted with the noise sample in intelligent cloud platform、Identification and classification，Obtain the counteracting factor of noise source，And corresponding data is passed to sef-adapting filter，Sef-adapting filter generates the inverted waveform burst of noise sound wave，The reverse sound wave interference waveform that noise is generated by sonification system，Noise waveform is cancelled out each other with reverse interference acoustic waveform，Realize noise reduction.
Description
Technical field
The present invention relates to noise reduction technology field, and in particular to a kind of intelligent noise of orientable noise reduction eliminates system.
Background technology
The phenomenon that noise disturbs residents, traffic noise, equipment noise, social noise, construction noise is frequently encountered in daily life
All it is relatively common noise source.Noise to by the hearing of sound person, eyesight, cardiovascular system etc. have larger damage, therefore
Noise reduction product has the very big market space.
Conventional noise abatement method has at present：
Reduce noise in acoustic approach, the propagation of control noise changes the noise transmission paths that sound source has been sent from.As adopted
The measures such as sound-absorbing, sound insulation, sound barrier, vibration isolation, and make rational planning for city and architectural composition etc..
Reduce sound source noise, industry, transportation can be selected the production equipment of low noise and be improved production technology, or
Person changes the motion mode of noise source（Such as reduce the vibration of solid sounding body with measures such as damping, vibration isolation）.
To carrying out noise protection by sound person or by sound organ.Cannot take measures in sound source and route of transmission, or take
Acoustical treatment when can not still produce a desired effect, it is necessary to taking safeguard procedures by sound person or by sound organ, such as long-term duty
The workman of industry post noise exposure can wear earplug, earmuff or head-shield.Ordinary people in the face of noise safeguard procedures mainly using the
Three kinds of modes, to carrying out noise protection by sound person or by sound organ.Such as by sound person by wearing the acoustical insulators such as earplug, earmuff or head-shield
Have to protect.
The objective shortcoming of prior art is essentially consisted in：1st, to carrying out the mode of noise protection by sound person or by sound organ, though
Effective, but it is poor to there is also following shortcoming, i.e. human sense of comfort：Wear the method for sound insulation instrument, although have to reducing noise
Certain effect, but for by sound person, have on these sound insulation instruments for a long time, human sense of comfort is poor；2nd, cannot accomplish to orient
Noise reduction, it is to realize noise reduction by sound insulation mode to wear sound insulation instrument, the characteristics of this mode be do not make any distinction between sound for institute
Sound has all carried out soundproof shielding case, and this can cause the appearance of new problem, such as can be the sound that some should not shield as some warn
Sound, telephone voice are also shielded simultaneously；3rd, ease of use not enough, generally will not carry with by these sound insulation instruments, when
When being had noise reduction demand by sound person, often just find do not have band sound insulation instrument, the convenience that therefore this mode is used is inadequate.
Content of the invention
In order to solve the defect that above-mentioned technology is present, the present invention provides a kind of intelligent noise of orientable noise reduction and eliminates system
System.The technical solution adopted in the present invention is as follows：
A kind of intelligent noise of orientable noise reduction eliminates system, and the intelligent noise eliminates the sound that system includes being built on equipment
Frequency perceptron, noise elimination subsystem, sef-adapting filter, sonification system and setting are beyond the clouds and wireless with the noise elimination subsystem
The intelligent cloud platform of communication；
The intelligent cloud platform, for the audio frequency that on-line/off-line collects all kinds of sound sources of storage, sets up audio repository；
The audio perception device, for gathering various sound source waveforms；
The noise elimination subsystem, for the noise source of corresponding variant frequency in the sound source waveform that gathers the audio perception device
Wave data pass to the sef-adapting filter；
The sef-adapting filter, is connected with the sonification system, for output corresponding to the reverse interference for treating noise elimination noise source
The burst of acoustic waveform；
Sonification system, exports reverse interference acoustic waveform, makes noise waveform mutual with reverse interference acoustic waveform
Offset, reservation sound source is delivered to by sound person with noiseless.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, during the intelligent cloud platform is used for audio repository
All kinds of noise sources are modeled and parameter training, generate the identification parameter of corresponding each noise like, each noise like are carried out after identification
Frequency dividing is sorted out, and establishes the counteracting factor of correspondingly all kinds of different frequency noise sources, provides basic noise filter for noise elimination subsystem
Ripple foundation.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the noise elimination subsystem is by the audio perception
Device is acquired to the sound source waveform of assigned direction, sound source waveform is carried out according to user setup screening source of sound parameter pre- after collection
Process, pretreated sound source waveform is contrasted, recognized and divided with the noise sample in the audio repository of the intelligent cloud platform
Class, and obtain the counteracting factor in the corresponding variant frequency noise source stored in the intelligent cloud platform.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the sef-adapting filter passes through adaptive-filtering
Algorithm updates and adjustment weight coefficient, gives the sonification system by signal transmission, and sonification system described in real-time control sends
Output signal and power output, make output signal sequence approach desired signal sequence, and the desired signal sequence is corresponding to treating
The reverse interference acoustic waveform of noise elimination noise source.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the equipment is Intelligent mobile equipment, including special
With terminal, intelligent Intelligent mobile equipment and panel computer.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the audio perception device is on Intelligent mobile equipment
Carry sound input system, the sonification system is to carry voice output system on Intelligent mobile equipment.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the noise elimination subsystem is additionally operable to by the sound
Frequency perceptron gathers various sound sources and is uploaded to the audio repository in the intelligent cloud platform.
The intelligent noise of above-mentioned a kind of orientable noise reduction eliminates system, and the audio repository in the intelligent cloud platform is described
When equipment is in data connection state, the noise elimination subsystem is set up with the audio repository in the intelligent cloud platform with online mode
Data cube computation, obtains the counteracting factor of noise source；Local audio storehouse is provided with the noise elimination subsystem, the equipment be in from
During line states, the noise elimination subsystem sets up data cube computation with offline mode and the local audio storehouse, obtains supporting for noise source
Disappear the factor.
Compared with prior art, beneficial effects of the present invention are：
1st, it is that decomposition absorbs to the handling principle of noise, rather than sound-insulating is processed.After audio perception device receives sound wave, by eliminating the noise
After audio frequency is decomposed by subsystem according to sound source, it would be desirable to which the sound source of noise elimination passes to sef-adapting filter, adaptive-filtering
Device adaptive algorithm produces the reverse sonic data for needing to eliminate sound sound source, transfers data to sending out for Intelligent mobile equipment
Sound system, sonification system produce the contrary interference waveform of waveform, and two kinds of contrary sound waves of waveform will be offset after overlapping, so as to reach
Decompose the effect for absorbing to noise.
2nd, real-time tracking, real-time, erasure effect is good.Noise elimination subsystem is the sound according to the collection of audio perception device
Ripple, carries out real-time decomposition, passes to sef-adapting filter, and sef-adapting filter adopts real-time recognizer, to ambient noise
Quick self-adapting estimation is carried out, the general character in ambient sound waves is rapidly found out, and is liquidated with which.
3rd, erasure effect is manually adjustable, and erasure effect can pass through Intelligent mobile equipment control and regulation output sound wave manually
Power be adjusted.
4th, sound source can be selected to be oriented noise reduction, has possessed high-performance treatments capabilities might in Intelligent mobile equipment
Under, the external voice of reception can be adapted to by sound source and be divided by noise elimination subsystem on Intelligent mobile equipment in time
Class, and according to being arranged by the noise elimination of sound person, noise elimination subsystem selectively controls sef-adapting filter and sonification system is produced and supported
Noise elimination ripple, so that realize the effect for orienting noise reduction.
5th, Intelligent mobile equipment will possess decrease of noise functions, need to increase sef-adapting filter functional module on hardware, only
Sef-adapting filter module need to be increased to existing Intelligent mobile equipment, it is possible to frequency is realized using Intelligent mobile equipment existing hardware
The function of spectrum interference, supporting installation noise elimination subsystem, it is possible to allow Intelligent mobile equipment that there is noise-reduction function.
6th, whenever and wherever possible, easy to use.The hardware device in addition to Intelligent mobile equipment will be carried by sound person, so that it may
To be serviced using noise reduction whenever and wherever possible.
7th, small range, limited noise protection, cost of implementation are cheap.Just can be produced with moment by Intelligent mobile equipment
The sound field space of one protection, substantially reduces noise, although formation noise cancellation space size is limited, needs to set intelligent mobile
Standby be placed at one's side, but noise reduction is quick and convenient, and compared with other noise reduction modes, the occasion for being particularly suitable for the quick noise reduction of small range makes
With.
8th, have wide range of applications, noise reduction demand is universal and extensive, intelligent mobile after therefore decrease of noise functions is likely to become
One of standard configuration function of equipment, makes the Intelligent mobile equipment with decrease of noise functions more competitive.
Description of the drawings
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the theory diagram that on-line/off-line of the present invention obtains audio samples；
Fig. 3 is the workflow diagram of the present invention.
Specific embodiment
For make to make the present invention further understand, referring to Figure of description and specific embodiment the present invention is made into
One step explanation：
As shown in Figure 1 to Figure 3, the intelligent noise of a kind of orientable noise reduction for providing for the present invention eliminates system, the intelligent noise
Elimination system includes an intelligent cloud platform with sound source identification function and noise audio repository and is built on equipment
Audio perception device, noise elimination subsystem, sef-adapting filter, sonification system.Intelligent cloud platform is used for the collection of continuous on-line/off-line and deposits
The audio frequency of various sound sources is stored up, audio repository is filled, by up to ten thousand kinds of ambient noise sound source samples, carrying out building storehouse and training, is used
HMM algorithms are modeled and parameter training, train the identification parameter of optimum.Audio repository in intelligent cloud platform is in equipment
During data connection state, noise elimination subsystem sets up data cube computation with online mode with the audio repository in intelligent cloud platform, and acquisition is made an uproar
The counteracting factor of sound source.Be provided with local audio storehouse in noise elimination subsystem, equipment be in off-line state when, noise elimination subsystem with from
Line mode sets up data cube computation with local audio storehouse, obtains the counteracting factor of noise source.With this quickly to actual field noise
Identification, carries out frequency dividing classification to noise after identification, and the counteracting predictor selection for establishing noise source with this, is that noise elimination subsystem is carried out
Filtering provides basic foundation.Audio perception device is used for gathering various sound source waveforms, and each by collected through noise elimination subsystem
Noise like source is uploaded to intelligent cloud platform, carries out sample filling to the audio repository of intelligent cloud platform and enriches.Sef-adapting filter
To after the various acoustic signals input adaptive wave filters for needing noise reduction that screen through noise elimination subsystem, by adaptive-filtering
Algorithm, updates, adjustment weight coefficient, sef-adapting filter by signal transmission to Intelligent mobile equipment sonification system, and in real time
Output signal and power output that control sonification system sends, make output signal sequence approach desired signal sequence, the expectation letter
The reverse sound wave of number sequence corresponding to noise source, so that reach the effect of noise-reduction.Common adaptive filter algorithm has：Pass
Push away least-squares algorithm, least-mean-square error algorithm, normalized mean squared error algorithm, quick accurate least-mean-square error algorithm,
Sub-band filter, adaptive-filtering of frequency domain etc..Wherein the most representative two classes adaptive algorithm of most typically be exactly recursion most
Young waiter in a wineshop or an inn's multiplication algorithm and least-mean-square error algorithm.
Sonification system, adaptive filter algorithm generate the reverse interference acoustic signals sequence of noise sound wave, must pass through
Sonification system could produce the reverse sound wave interference waveform of noise, and noise is cancelled out each other with interference acoustic waveform, realizes that noise reduction disappears
Sound function.Noise elimination subsystem, with Application on Voiceprint Recognition function, is acquired to the sound source of assigned direction with audio perception device first,
After to sound wave pretreatment, by being contrasted, being recognized and being classified with intelligent cloud platform noise sample, and obtain the counteracting of sound source because
Son, and corresponding data passes to sef-adapting filter.Specifically there are following functions：
1st, source of sound and orientation noise-reduction are screened in real time：According to the screening source of sound parameter that client sets, in real time by audio perception device
The sound of collection is pre-processed and is classified, and the source of sound and the related counteracting factor that need noise reduction are sent to sef-adapting filter and are entered
Row self adaptation and generation spectral interference burst.
2nd, all kinds of sources of sound are collected and forms source of sound storehouse：Source of sound can be divided into wind and rain sound, road noise, the nose sound of snoring, finishing noise etc.
Various sources of sound can constantly be gathered it is uploaded to the abundant source of sound storehouse of intelligent cloud platform Deng, noise elimination subsystem.
Specifically, in a preferred embodiment of the invention, equipment is Intelligent mobile equipment, including but not limited to special end
End, smart mobile phone and panel computer, noise elimination subsystem is the noise reduction APP application programs on Intelligent mobile equipment.Audio frequency
Perceptron is to carry sound input system on Intelligent mobile equipment, sonification system be on Intelligent mobile equipment to carry sound defeated
Go out system.In some other embodiment, the equipment can also include broadcast for sounding, communication tool.Noise elimination subsystem
The built-in application program that can also be set to accordingly on industrial computer.
The present invention principle of noise reduction be：When noise is to attack, Intelligent mobile equipment is set by noise elimination subsystem by sound person
Noise-reduction parameter, and start noise elimination subsystem.Audio perception device initially receives the waveform composition of ambient noise, son of eliminating the noise
System carries out audible spectrum analysis and decomposition to these waveform compositions, and according to the noise reduction parameter setting by sound person, selecting needs
The audio frequency of noise reduction and the related counteracting factor is wanted, sef-adapting filter is passed to.Acoustic signals of the sef-adapting filter to the audio frequency
By specific algorithm, it is updated, adjusts the process such as weight coefficient, and real-time control sonification system is produced and needs noise reduction frequency spectrum
Reverse interference waveform, noise elimination subsystem are adapted to the power output of reverse sound wave spectrum according to erasure effect automatic/hand, until allowing
Two kinds of contrary waveforms are cancelled out each other, completely overlapped after can just be completely counterbalanced by, so as to reach to specify sound source decomposition absorb
Effect.It is delivered to by sound person together through the noise source and undisturbed reservation sound source of noise reduction process, is dropped to greatest extent
The low interference of noise so that retain sound source and clearly can be delivered to by sound person.
Noise reduction schematic flow sheet is as shown in Figure 2：
The first step：Running noise elimination subsystem, and offset Phonon System carries out noise elimination parameter setting, arranges and retains dialogue sound
Source, eliminates other noises；
Second step：Audio perception device gathers various sound source waveforms；
3rd step：Noise elimination subsystem carries out pre-processing, contrast, recognize and classifying to all kinds of sound sources, and by treat noise reduction waveform and
Offset the factor and be sent to sef-adapting filter；
4th：By adaptive algorithm, formed needs the inverted waveform signal of noise elimination sound source to sef-adapting filter；
5th step：Sef-adapting filter control Intelligent mobile equipment sonification system produces reverse interference waveform, interference waveform with
Noise waveform carries out cancel out each other realization orientation noise reduction and noise elimination in real time；
6th step：The noise sound wave and glitch-free reservation sound source being disturbed is delivered to by sound person.
The intelligent noise of a kind of orientable noise reduction of the present invention eliminates system and provides a kind of orientable noise reduction, is easy to oneself
The external noise reduction mode of carrying.The features such as Intelligent mobile equipment is portable, carry-on, setting facilitates is based especially on, by intelligence
Energy mobile device is implanted into sef-adapting filter functional module, is combined with the sonification system of Intelligent mobile equipment, and composition can be with noise reduction
Frequency interferences module, by noise elimination subsystem mode arrange noise reduction parameter and screen screening noise sound source, and control frequency do
Disturb module and produce reverse noise reduction waveform, some sound are carried out decomposition absorption selectively, receive sound person's body periphery small range
Inside set up a noise protection barrier temporarily, so as to provide the user one can noise reduction whenever and wherever possible means.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
The simply present invention of the personnel it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and specification
Principle, without departing from the spirit and scope of the present invention the present invention also have various changes and modifications, these change and
Improvement is both fallen within the range of claimed invention, the protection domain of application claims by appending claims and its
Equivalent is defined.
Claims (8)
1. a kind of intelligent noise of orientable noise reduction eliminates system, it is characterised in that in the intelligent noise elimination system includes
Put audio perception device on equipment, noise elimination subsystem, sef-adapting filter, sonification system and arrange beyond the clouds and with described
The intelligent cloud platform of noise elimination subsystem radio communication；
The intelligent cloud platform, for the audio frequency that on-line/off-line collects all kinds of sound sources of storage, sets up audio frequency
Storehouse；
The audio perception device, for gathering various sound source waveforms；
The noise elimination subsystem, for the noise source of corresponding variant frequency in the sound source waveform that gathers the audio perception device
Wave data pass to the sef-adapting filter；
The sef-adapting filter, is connected with the sonification system, for output corresponding to the reverse interference for treating noise elimination noise source
The burst of acoustic waveform；
Sonification system, exports reverse interference acoustic waveform, makes noise waveform mutual with reverse interference acoustic waveform
Offset, reservation sound source is uninterruptedly traveled to by sound person.
2. a kind of intelligent noise of orientable noise reduction according to claim 1 eliminates system, it is characterised in that the intelligence
All kinds of noise sources during cloud platform is used for audio repository are modeled and parameter training, generate the identification ginseng of corresponding each noise like
Number, carries out frequency dividing classification to each noise like after identification, and establishes the counteracting factor of correspondingly all kinds of different frequency noise sources, is noise elimination
Subsystem provides basic noise filtering foundation.
3. a kind of intelligent noise of orientable noise reduction according to claim 2 eliminates system, it is characterised in that the noise elimination
Subsystem is acquired to the sound source waveform of assigned direction by the audio perception device, screens sound according to user setup after collection
Source parameter is pre-processed to sound source waveform, the noise in pretreated sound source waveform and the audio repository of the intelligent cloud platform
Sample is contrasted, recognized and is classified, and is obtained the corresponding variant frequency noise source stored in the intelligent cloud platform and supported
Disappear the factor.
4. a kind of intelligent noise of orientable noise reduction according to claim 3 eliminates system, its feature
It is, the sef-adapting filter is updated by adaptive filter algorithm and adjusts weight coefficient, by signal transmission to institute
State sonification system, and the output signal that sends of sonification system described in real-time control and power output, approach output signal sequence
Desired signal sequence, the desired signal sequence are corresponding to the reverse interference acoustic waveform for treating noise elimination noise source.
5. a kind of intelligent noise of orientable noise reduction according to claim 1 eliminates system, it is characterised in that the equipment
For Intelligent mobile equipment, including special-purpose terminal, smart mobile phone and panel computer.
6. a kind of intelligent noise of orientable noise reduction according to claim 5 eliminates system, it is characterised in that the audio frequency
Perceptron is to carry sound input system on Intelligent mobile equipment, and the sonification system is to carry sound on Intelligent mobile equipment
Sound output system.
7. a kind of intelligent noise of orientable noise reduction according to claim 3 eliminates system, it is characterised in that the noise elimination
Subsystem is additionally operable to be uploaded to the audio repository in the intelligent cloud platform by the various sound sources of audio perception device collection.
8. a kind of intelligent noise of orientable noise reduction according to claim 1 eliminates system, it is characterised in that the intelligence
, when the equipment is in data connection state, the noise elimination subsystem is with online mode and the intelligence for audio repository in cloud platform
Audio repository in energy cloud platform sets up data cube computation, obtains the counteracting factor of noise source, is provided with local in the noise elimination subsystem
Audio repository, when the equipment is in off-line state, the noise elimination subsystem sets up data with offline mode and local audio storehouse
Connection, obtains the counteracting factor of noise source.
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Cited By (13)
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| CN107045778A (en) * | 2017-04-26 | 2017-08-15 | 兰州交通大学 | A kind of Multifunctional noise bucking-out system |
| CN107808657A (en) * | 2017-11-30 | 2018-03-16 | 会听声学科技（北京）有限公司 | The design system and method for active noise reduction earphone |
| CN108257617A (en) * | 2018-01-11 | 2018-07-06 | 会听声学科技（北京）有限公司 | A kind of noise scenarios identifying system and method |
| CN108538281A (en) * | 2018-04-18 | 2018-09-14 | 会听声学科技（北京）有限公司 | Noise-reduction method, noise reduction system and earphone |
| CN108847250A (en) * | 2018-07-11 | 2018-11-20 | 会听声学科技（北京）有限公司 | A kind of orientation noise-reduction method, system and earphone |
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| CN110198374A (en) * | 2019-05-30 | 2019-09-03 | 深圳市趣创科技有限公司 | A kind of mobile phone speech noise-reduction method and device based on error correction learning rules |
| CN111951802A (en) * | 2020-08-10 | 2020-11-17 | 山东金东数字创意股份有限公司 | Visual expression system and method based on AI voice recognition |
| CN112448787A (en) * | 2019-09-02 | 2021-03-05 | 中兴通讯股份有限公司 | Method, device and system for preventing eavesdropping and stealing recording in conference |
| WO2021258724A1 (en) * | 2020-06-22 | 2021-12-30 | 中兴通讯股份有限公司 | Terminal, sound production method, storage medium, and electronic device |
| CN115188360A (en) * | 2022-06-29 | 2022-10-14 | 一汽奔腾轿车有限公司 | An active vehicle-mounted holographic noise reduction air conditioning system |
| CN118624005A (en) * | 2024-08-14 | 2024-09-10 | 宁波码实智能科技有限公司 | A new energy vehicle motor noise detection method and system |
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