CN105810187A - Noise eliminating method and device - Google Patents
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- CN105810187A CN105810187A CN201410838576.5A CN201410838576A CN105810187A CN 105810187 A CN105810187 A CN 105810187A CN 201410838576 A CN201410838576 A CN 201410838576A CN 105810187 A CN105810187 A CN 105810187A
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Abstract
The invention provides a noise eliminating method and device. The method comprises the steps of acquiring a first parameter and a first acoustic parameter corresponding to the first parameter, wherein the first parameter at least comprises a parameter for indicating a noise characteristic of a noise source, and the first acoustic parameter is used for characterizing a physical characteristic of noise caused by the at least one noise source; determining first acoustic wave according to the first acoustic parameter, wherein the amplitudes of the first acoustic wave and the noise generated by the at least one noise source at the same moment and under the same frequency counteract; and emitting the first acoustic wave. The method and the device can emit the acoustic wave counteracting with the noise generated by the noise source, thereby fulfilling the purpose of reducing and even eliminating noise.
Description
Technical field
The application relates to electronic information field, particularly relates to a kind of noise cancellation method and device.
Background technology
Generally, in the electronic device, it is necessary to be deployed as the fan of processor or Hard disk heat radiation, to reduce the temperature of processor or hard disk, it is prevented that overheated.But for calculate can be powerful processor or read hard disk frequently, it is necessary to for its fan being equipped with large volume, and this can introduce bigger noise undoubtedly.
Further, the hard disk in electronic equipment, when being read, also results in noise, and along with the function of electronic equipment is become stronger day by day, also more and more higher for the capacity of hard disk and the requirement of reading speed, this can increase the noise of hard disk undoubtedly.
Visible, how to reduce the noise in electronic equipment and become current problem demanding prompt solution.
Summary of the invention
This application provides a kind of noise cancellation method and device, it is therefore intended that the problem solving how to reduce the noise in electronic equipment.
To achieve these goals, this application provides techniques below scheme:
A kind of noise cancellation method, including:
Obtain the first parameter, described first parameter at least includes the parameter of the noise characteristic of one noise source of instruction；
Obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
According to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
Send described first sound wave.
Alternatively, described acquisition the first parameter includes::
Obtain at least one noise source rotating speed under current operation state.
Alternatively, the first acoustic wave parameter that described acquisition is corresponding with described first parameter, including:
Based on described first parameter, the corresponding relation between parameter and the acoustic wave parameter of noise characteristic that prestored by inquiry, that indicate each noise source, obtain first acoustic wave parameter corresponding with described first parameter.
Alternatively, the first acoustic wave parameter that described acquisition is corresponding with described first parameter, wherein, described first acoustic wave parameter includes for the physical features characterizing the noise caused by least one noise source described:
Obtain frequency and the amplitude of the noise that described noise source causes, described frequency and described amplitude respectively for indicating the physical features of the noise caused by described noise source.
Alternatively, described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
When described first acoustic wave parameter includes first frequency and the first amplitude, using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave.
Alternatively, described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
Include in the parameter situation indicating the noise characteristic of N number of noise source in described first parameter, determine the first sound wave, described first sound wave includes N number of sound wave, wherein the frequency of i-th sound wave is the frequency i corresponding with the parameter indicating described i-th noise source, amplitude is the negative value of the amplitude i corresponding with the parameter indicating described i-th noise source, N is the integer more than 1, and i is the integer less than or equal to N.
Alternatively, described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
The parameter indicating the noise characteristic of N number of noise source is included in described first parameter, and the frequency corresponding with described N number of parameter is when being first frequency, determine the first sound wave, the frequency of described first sound wave is described first frequency, and the amplitude of described first sound wave is the negative value of described N number of amplitude sum.
Alternatively, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency cancels each other, including:
It is zero that described first sound wave superposes sum with described noise amplitude under synchronization, same frequency.
Alternatively, send described first sound wave described in include:
Control audible device and send described first sound wave.
A kind of noise elimination apparatus, including:
First acquisition module, is used for obtaining the first parameter, at least includes the parameter of the noise characteristic of one noise source of instruction in described first parameter；
Second acquisition module, for obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
Determining module, for according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
Sounding module, is used for sending described first sound wave.
Alternatively, described first acquisition module is used for obtaining the first parameter, including:
Described first acquisition module specifically for, obtain at least one noise source rotating speed under current operation state.
Alternatively, described second acquisition module is used for obtaining first acoustic wave parameter corresponding with described first parameter, including:
Described second acquisition module specifically for, based on described first parameter, by inquiring about the corresponding relation between parameter and the acoustic wave parameter of noise characteristic that prestore, that indicate each noise source, obtain first acoustic wave parameter corresponding with described first parameter.
Alternatively, described second acquisition module is for obtaining first acoustic wave parameter corresponding with described first parameter, and wherein, described first acoustic wave parameter is used for characterizing the physical features of the noise caused by least one noise source described, including:
Described second acquisition module specifically for, obtain frequency and the amplitude of the noise that described noise source causes, described frequency and described amplitude respectively for indicating the physical features of the noise caused by described noise source.
Alternatively, described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, when described first acoustic wave parameter includes first frequency and the first amplitude, using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave.
Alternatively, described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, when described first parameter includes the noise characteristic indicating N number of noise source, determine the first sound wave, described first sound wave includes N number of sound wave, wherein the frequency of i-th sound wave is the frequency i corresponding with the parameter indicating described i-th noise source, amplitude is the negative value of the amplitude i corresponding with the parameter indicating described i-th noise source, and N is the integer more than 1, and i is the integer less than or equal to N.
Alternatively, described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, the parameter indicating the noise characteristic of N number of noise source is included in described first parameter, and the frequency corresponding with described N number of parameter is when being first frequency, determine the first sound wave, the frequency of described first sound wave is described first frequency, and the amplitude of described first sound wave is the negative value of described N number of amplitude sum.
Alternatively, described determining that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other, including:
Described determine module specifically for, according to described first acoustic wave parameter, it is determined that the first sound wave, it is zero that described first sound wave superposes sum with described noise amplitude under synchronization, same frequency.
Alternatively, described sounding module is used for sending described first sound wave, including:
Described sounding module specifically for, control audible device send described first sound wave.
Noise cancellation method described herein and device, obtain the first parameter and first acoustic wave parameter corresponding with described first parameter, wherein, first parameter at least includes the parameter of the noise characteristic of one noise source of instruction, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described, according to described first acoustic wave parameter, determine the first sound wave, the noise that described first sound wave and at least one noise source described produce is at synchronization, amplitude under same frequency is cancelled out each other, and send described first sound wave, visible, method described herein and device, the sound wave that the noise generated with noise source offsets can be sent, such that it is able to realize reducing the purpose even eliminating noise.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the disclosed a kind of noise cancellation method flow chart of the embodiment of the present application；
Fig. 2 is the flow chart of the embodiment of the present application another noise cancellation method disclosed；
Fig. 3 is after using method described in the embodiment of the present application and does not adopt the curve synoptic diagram of noise level of noise reduction measure；
Fig. 4 is the flow chart of the embodiment of the present application another noise cancellation method disclosed；
Fig. 5 is the embodiment of the present application another noise cancellation method flow chart disclosed；
Fig. 6 is the structural representation of a kind of noise elimination apparatus disclosed in the embodiment of the present application.
Detailed description of the invention
Noise cancellation method disclosed in the embodiment of the present application and device, it is possible on an electronic device, described electronic equipment has the noise source that can produce noise, for instance hard disk or fan in application.Noise cancellation method and the purpose of device described in the embodiment of the present application are in that to eliminate the noise of electronic equipment.
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of the application protection.
The disclosed a kind of noise cancellation method of the embodiment of the present application, as it is shown in figure 1, include:
S101: obtain the first parameter, at least includes the parameter of the noise characteristic of one noise source of instruction in described first parameter；
Such as, the hard disk in electronic equipment can produce noise when being read out, and fan operationally also results in noise, thus, it is possible to obtain the parameter of instruction one of hard disk or fan or both noise characteristics.
S102: obtain first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
S103: according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
S104: send described first sound wave.
In the prior art, device in electronic equipment is in the process run, it is possible to can produce noise, and the way of common elimination noise is to reduce the work efficiency of noise source, such as reduce the rotating speed of fan or reduce the reading times to hard disk, and this can affect the service behaviour of electronic equipment undoubtedly.
And the method described in the present embodiment, produced the sound wave enough cancelled out each other with sound wave energy by noise parameter, and send this sound wave, so, it is not necessary to the service behaviour reducing electronic equipment can realize good noise cancellation effect.
The embodiment of the present application another noise cancellation method disclosed, as in figure 2 it is shown, comprise the following steps:
S201: obtain the rotating speed that the noise source such as fan or hard disk is current；
S202: based on the rotating speed that the noise source such as fan or hard disk is current, by inquiring about the corresponding relation between that prestore, instruction current rotating speed and the acoustic wave parameter of the noise source such as fan or hard disk, obtain the rotating speed current with the noise source such as fan or hard disk corresponding, first frequency and the first amplitude；
S203: using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave, it is determined that the first sound wave；
Therefore, described first sound wave superposes sum with described noise amplitude under synchronization, same frequency is zero.
S204: control audible device and send the first sound wave.
In the present embodiment, audible device can be but be not limited to speaker.
Method described in the present embodiment, in the ideal situation, it is possible to eliminate noise, when there is error in actual applications, it is possible to effectively reduce noise.It is illustrated in figure 3 after using method described in the present embodiment and does not adopt the curve synoptic diagram of the noise level of noise reduction measure.
The embodiment of the present application another noise cancellation method disclosed, as shown in Figure 4, comprises the following steps:
S401: obtain the first parameter, the first parameter includes the parameter indicating respectively the noise characteristic of N number of noise source；
S402: obtain the frequency corresponding with each parameter in the first parameter and amplitude respectively, the wherein a corresponding frequency i and amplitude i of the i-th parameter in N number of parameter；
S403: determining the first sound wave, described first sound wave includes N number of sound wave, wherein, the frequency of i-th sound wave is frequency i, and amplitude is the negative value of amplitude i；
Wherein, N is the integer more than 1, and i is the integer less than or equal to N；
S404: control audible device and send the first sound wave.
In the present embodiment, when the quantity of noise source is more than 1, it is possible to the noise produced respectively for each noise source generates corresponding elimination sound wave, thus realizing the purpose that noise eliminates.
Such as, obtain the current rotating speed of hard disk and the current rotating speed of fan, based on the rotating speed that hard disk is current, prestored by inquiry, corresponding relation between rotating speed and acoustic wave parameter that instruction hard disk is current, obtain the rotating speed current with hard disk corresponding, first frequency and the first amplitude, based on the rotating speed that fan is current, prestored by inquiry, corresponding relation between rotating speed and acoustic wave parameter that instruction fan is current, obtain the rotating speed current with fan corresponding, second frequency and the second amplitude, using described first frequency as frequency, using the negative value of described first amplitude as amplitude, determine the first elimination sound wave, the noise caused for eliminating hard disk to rotate, using described second frequency as frequency, using the negative value of the second amplitude as amplitude, determine the second elimination sound wave, the noise caused for eliminating fan to rotate.
The embodiment of the present application another noise cancellation method disclosed, as it is shown in figure 5, comprise the following steps:
S501: obtain the first parameter, the first parameter includes the parameter indicating respectively the noise characteristic of N number of noise source；
S502: obtain the frequency corresponding with each parameter in the first parameter and amplitude respectively, wherein, frequency corresponding to N number of parameter is first frequency；
S503: determine the first sound wave, the frequency of the first sound wave is described first frequency, and the amplitude of the first sound wave is the negative value of N number of amplitude sum；
S504: control audible device and send the first sound wave.
Unlike the embodiments above is, in the present embodiment, in the quantity of noise source more than 1 and when the frequency of noise that causes of N number of noise source is first frequency, generate the elimination sound wave of the noise that each noise source produces no longer respectively, but produce a sound wave, it is used for eliminating this N kind noise.
Such as, obtain the current rotating speed of hard disk and the current rotating speed of fan, based on the rotating speed that hard disk is current, prestored by inquiry, corresponding relation between rotating speed and acoustic wave parameter that instruction hard disk is current, obtain the rotating speed current with hard disk corresponding, first frequency and the first amplitude, based on the rotating speed that fan is current, prestored by inquiry, corresponding relation between rotating speed and acoustic wave parameter that instruction fan is current, obtain the rotating speed current with fan corresponding, second frequency and the second amplitude, when first frequency is identical with second frequency, generate the first sound wave, its frequency is first frequency, its amplitude is the first amplitude and the negative value of the second amplitude sum.
With said method embodiment accordingly, the embodiment of the present application also discloses a kind of noise elimination apparatus, as shown in Figure 6, and including:
First acquisition module 601, is used for obtaining the first parameter, at least includes the parameter of the noise characteristic of one noise source of instruction in described first parameter；
Second acquisition module 602, for obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
Determining module 603, for according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
Specifically, that cancels out each other can refer to: it is zero that described first sound wave superposes sum with described noise amplitude under synchronization, same frequency.
Sounding module 604, is used for sending described first sound wave.
Method described in the present embodiment, is produced the sound wave enough cancelled out each other with sound wave energy, and sends this sound wave by noise parameter, so, it is not necessary to the service behaviour reducing electronic equipment can realize good noise cancellation effect.
Further, alternatively, in the present embodiment, the first acquisition module obtains the specific implementation of the first parameter and can be: obtain at least one noise source rotating speed under current operation state.
Second acquisition module obtains the specific implementation of first acoustic wave parameter corresponding with described first parameter: based on described first parameter, corresponding relation between parameter and the acoustic wave parameter of noise characteristic that prestored by inquiry, that indicate each noise source, obtains first acoustic wave parameter corresponding with described first parameter.
Second acquisition module obtains the specific implementation of first acoustic wave parameter corresponding with described first parameter: obtain frequency and the amplitude of the noise that described noise source causes, described frequency and described amplitude respectively for indicating the physical features of the noise caused by described noise source.
Determine that module is according to described first acoustic wave parameter, the specific implementation determining the first sound wave can be: when described first acoustic wave parameter includes first frequency and the first amplitude, using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave；Or, when described first parameter includes the noise characteristic indicating N number of noise source, determine the first sound wave, described first sound wave includes N number of sound wave, wherein the frequency of i-th sound wave is the frequency i corresponding with the parameter indicating described i-th noise source, and amplitude is the negative value of the amplitude i corresponding with the parameter indicating described i-th noise source；Or, the parameter indicating the noise characteristic of N number of noise source is included in described first parameter, and the frequency corresponding with described N number of parameter is when being first frequency, determine the first sound wave, the frequency of described first sound wave is described first frequency, and the amplitude of described first sound wave is the negative value of described N number of amplitude sum.
Wherein, N is the integer more than 1, and i is the integer less than or equal to N.
Sounding module sends described first sound wave, specific implementation can be: control audible device send described first sound wave.
The specific works flow process of the device described in the present embodiment may refer to, described in said method embodiment, repeat no more here.
If the function described in the embodiment of the present application method is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computing equipment read/write memory medium.Based on such understanding, part or the part of this technical scheme that prior art is contributed by the embodiment of the present application can embody with the form of software product, this software product is stored in a storage medium, including some instructions with so that a computing equipment (can be personal computer, processor, mobile computing device or the network equipment etc.) perform all or part of step of method described in each embodiment of the application.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment same or similar part mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the application.The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein when without departing from spirit herein or scope, can realize in other embodiments.Therefore, the application is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (18)
1. a noise cancellation method, it is characterised in that including:
Obtain the first parameter, described first parameter at least includes the parameter of the noise characteristic of one noise source of instruction；
Obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
According to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
Send described first sound wave.
2. method according to claim 1, it is characterised in that described acquisition the first parameter includes:
Obtain at least one noise source rotating speed under current operation state.
3. method according to claim 1 and 2, it is characterised in that the first acoustic wave parameter that described acquisition is corresponding with described first parameter, including:
Based on described first parameter, the corresponding relation between parameter and the acoustic wave parameter of noise characteristic that prestored by inquiry, that indicate each noise source, obtain first acoustic wave parameter corresponding with described first parameter.
4. method according to claim 3, it is characterised in that the first acoustic wave parameter that described acquisition is corresponding with described first parameter, wherein, described first acoustic wave parameter includes for the physical features characterizing the noise caused by least one noise source described:
Obtain frequency and the amplitude of the noise that described noise source causes, described frequency and described amplitude respectively for indicating the physical features of the noise caused by described noise source.
5. the method according to claim 1 or 4, it is characterised in that described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
When described first acoustic wave parameter includes first frequency and the first amplitude, using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave.
6. the method according to claim 1 or 4, it is characterised in that described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
Include in the parameter situation indicating the noise characteristic of N number of noise source in described first parameter, determine the first sound wave, described first sound wave includes N number of sound wave, wherein the frequency of i-th sound wave is the frequency i corresponding with the parameter indicating described i-th noise source, amplitude is the negative value of the amplitude i corresponding with the parameter indicating described i-th noise source, N is the integer more than 1, and i is the integer less than or equal to N.
7. the method according to claim 1 or 4, it is characterised in that described according to described first acoustic wave parameter, it is determined that the first sound wave includes:
The parameter indicating the noise characteristic of N number of noise source is included in described first parameter, and the frequency corresponding with described N number of parameter is when being first frequency, determine the first sound wave, the frequency of described first sound wave is described first frequency, and the amplitude of described first sound wave is the negative value of described N number of amplitude sum.
8. method according to claim 1, it is characterised in that the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency cancels each other, including:
It is zero that described first sound wave superposes sum with described noise amplitude under synchronization, same frequency.
9. method according to claim 1 and 2, it is characterised in that described in send described first sound wave and include:
Control audible device and send described first sound wave.
10. a noise elimination apparatus, it is characterised in that including:
First acquisition module, is used for obtaining the first parameter, at least includes the parameter of the noise characteristic of one noise source of instruction in described first parameter；
Second acquisition module, for obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is for characterizing the physical features of the noise caused by least one noise source described；
Determining module, for according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other；
Sounding module, is used for sending described first sound wave.
11. device according to claim 10, it is characterised in that described first acquisition module is used for obtaining the first parameter, including:
Described first acquisition module specifically for, obtain at least one noise source rotating speed under current operation state.
12. the device according to claim 10 or 11, it is characterised in that described second acquisition module is used for obtaining first acoustic wave parameter corresponding with described first parameter, including:
Described second acquisition module specifically for, based on described first parameter, by inquiring about the corresponding relation between parameter and the acoustic wave parameter of noise characteristic that prestore, that indicate each noise source, obtain first acoustic wave parameter corresponding with described first parameter.
13. device according to claim 12, it is characterized in that, described second acquisition module is for obtaining first acoustic wave parameter corresponding with described first parameter, wherein, described first acoustic wave parameter is used for characterizing the physical features of the noise caused by least one noise source described, including:
Described second acquisition module specifically for, obtain frequency and the amplitude of the noise that described noise source causes, described frequency and described amplitude respectively for indicating the physical features of the noise caused by described noise source.
14. the device according to claim 10 or 12, it is characterised in that described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, when described first acoustic wave parameter includes first frequency and the first amplitude, using the described first frequency frequency as described first sound wave, using the negative value of the described first amplitude amplitude as described first sound wave.
15. the device according to claim 10 or 12, it is characterised in that described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, when described first parameter includes the noise characteristic indicating N number of noise source, determine the first sound wave, described first sound wave includes N number of sound wave, wherein the frequency of i-th sound wave is the frequency i corresponding with the parameter indicating described i-th noise source, amplitude is the negative value of the amplitude i corresponding with the parameter indicating described i-th noise source, and N is the integer more than 1, and i is the integer less than or equal to N.
16. the device according to claim 10 or 12, it is characterised in that described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, including:
Described determine module specifically for, the parameter indicating the noise characteristic of N number of noise source is included in described first parameter, and the frequency corresponding with described N number of parameter is when being first frequency, determine the first sound wave, the frequency of described first sound wave is described first frequency, and the amplitude of described first sound wave is the negative value of described N number of amplitude sum.
17. device according to claim 10, it is characterized in that, described determine that module is for according to described first acoustic wave parameter, it is determined that the first sound wave, the noise that described first sound wave and at least one noise source described produce amplitude under synchronization, same frequency is cancelled out each other, including:
Described determine module specifically for, according to described first acoustic wave parameter, it is determined that the first sound wave, it is zero that described first sound wave superposes sum with described noise amplitude under synchronization, same frequency.
18. the device according to claim 10 or 11, it is characterised in that described sounding module is used for sending described first sound wave, including:
Described sounding module specifically for, control audible device send described first sound wave.
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| CN101751918A (en) * | 2008-12-18 | 2010-06-23 | 李双清 | Novel silencer and noise reduction method |
| CN101859563A (en) * | 2009-04-09 | 2010-10-13 | 哈曼国际工业有限公司 | Active noise control system based on audio system output |
| CN102056050A (en) * | 2009-10-28 | 2011-05-11 | 飞兆半导体公司 | Active noise cancellation |
| CN202487154U (en) * | 2012-02-24 | 2012-10-10 | 重庆西茵科技有限公司 | Noise reducing device for computer radiator |
| CN103531195A (en) * | 2012-07-02 | 2014-01-22 | 华为技术有限公司 | Noise reduction method, equipment and system |
| CN103474060A (en) * | 2013-09-06 | 2013-12-25 | 深圳供电局有限公司 | Electrical equipment noise active suppression method based on internal model control |
| CN203882607U (en) * | 2014-04-05 | 2014-10-15 | 中国石油大学(华东) | Silencer |
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Application publication date: 20160727 |