CN105635866A - Method and device for removing noise by adopting multiple microphones - Google Patents
Method and device for removing noise by adopting multiple microphones Download PDFInfo
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- CN105635866A CN105635866A CN201610104985.1A CN201610104985A CN105635866A CN 105635866 A CN105635866 A CN 105635866A CN 201610104985 A CN201610104985 A CN 201610104985A CN 105635866 A CN105635866 A CN 105635866A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2410/00—Microphones
- H04R2410/01—Noise reduction using microphones having different directional characteristics
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a method and a device for removing noise by adopting multiple microphones. The method comprises the steps of receiving first sound signals from a first direction; receiving second sound signals from a second direction which is different from the first direction; comparing sound volumes in the first sound signals and the second sound signals; carrying out volume noise reduction processing for sound signals with the same volumes in both the first sound signals and the second sound signals; and storing a sound frequency of a person when speaking, comparing the stored sound frequency with a sound frequency in the first sound signals and the second sound signals, and carrying out frequency noise reduction processing for the sound with the frequency outside the scope of the stored sound frequency of the first sound signals and the second sound signals. As a first microphone and a second microphone are adopted in the method, and a first noise reduction module and a second noise reduction module respectively carry out volume noise reduction processing and frequency noise reduction processing for the first sound signals and the second sound signals, the method and device for removing noise by adopting multiple microphones have the advantages of simple structure, low production cost, high noise reduction efficiency, unchanged tone quality and the like.
Description
Technical field
The present invention relates to noise cancellation technique field, especially relate to a kind of method adopting many miaows head to eliminate noise and device.
Background technology
In commercial production and daily life, often there is the environment that noise is excessive, the noise of these environment not only can damage the audition of people, but also can disturb normal talking and the communication of people. Such as, when people compare and say phone at bar or KTV etc. in noisy environment, noise and user voice will together enter in call miaow head, and namely miaow head can receive noise and user voice simultaneously. In order to solve this problem, people have invented a kind of denoising device that can converse, the principle of the denoising device of this structure is, when call, the frequency of noise is obtained by noise samples module, then output one is identical with the frequency of noise, act in agreement and the sound wave of opposite in phase, makes the sound wave of noise and output interfere and cancel out each other, has thus reached the purpose of elimination noise. The problems such as but the denoising device of this structure has structure complexity, production cost is high, noise reduction efficacy is low and tonequality can change.
Summary of the invention
In order to overcome the problems referred to above, a kind of method adopting many miaows head to eliminate noise that the present invention provides noise reduction efficacy high to society and tonequality will not change.
Many miaows head that adopts that the present invention also provides for a kind of simple in construction to society, production cost is low, noise reduction efficacy is high and tonequality will not change eliminates the device of noise.
A kind of technical scheme of the present invention is: provide a kind of method adopting many miaows head to eliminate noise, including:
Receive the first acoustical signal from first direction;
Receive the second sound signal from the second direction different with described first direction;
Wave volume in described first acoustical signal and described second sound signal is contrasted, the acoustical signal that described first acoustical signal is identical with volume in described second sound signal is carried out volume noise reduction process;
Sound frequency when storage people speaks, the sound frequency of storage contrasts with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process.
In opposite direction as improvement of the present invention, described first direction and described second direction.
As improvement of the present invention, when people speaks, audio frequency range is greater than arriving equal to 65 hertz between less than or equal to 1100 hertz.
As improvement of the present invention, first carry out volume decrease and make an uproar process, after volume noise reduction process completes, carry out frequency noise reduction process again; Or advanced line frequency noise reduction process, carries out volume noise reduction process again after frequency noise reduction process completes.
The another kind of technical scheme of the present invention is: provide a kind of device adopting many miaows head to eliminate noise, including:
More than one first miaow head, described first miaow head is for receiving the first acoustical signal from first direction;
More than one second miaow head, described second miaow head is for receiving the second sound signal from the second direction different with described first direction;
Volume contrast module and the first noise reduction module being electrically connected with described volume contrast module, wave volume in described first acoustical signal and described second sound signal is contrasted by described volume contrast module, and the acoustical signal that described first acoustical signal is identical with volume in described second sound signal is carried out volume noise reduction process by described first noise reduction module;
Memory module, frequency contrast module and the second noise reduction module being electrically connected successively, described memory module is for storing sound frequency when people speaks, described frequency contrast module is for contrasting the sound frequency of storage with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process to described second noise reduction module.
In opposite direction as improvement of the present invention, described first direction and described second direction.
As improvement of the present invention, described first miaow head and described second miaow head contrast module with described volume respectively and are electrically connected, and described first noise reduction module is electrically connected with described frequency contrast module.
As improvement of the present invention, described first miaow head and described second miaow head are electrically connected with described frequency contrast module respectively, and described second noise reduction module is electrically connected with described volume contrast module.
As improvement of the present invention, also include sound shield shell, described first miaow head and described second miaow head and be arranged in described sound shield shell.
As improvement of the present invention, also including the first sound inlet and the second sound inlet, the corresponding described first direction of described first sound inlet is arranged on described sound shield shell, and the corresponding described second direction of described second sound inlet is arranged on described sound shield shell.
Due to the fact that and have employed the first miaow head and the second miaow head, first miaow head is used for receiving the first acoustical signal, second miaow head is used for receiving second sound signal, first acoustical signal and second sound signal are carried out volume noise reduction process and frequency noise reduction process by the first noise reduction module and the second noise reduction module respectively, after volume noise reduction process and frequency noise reduction process, substantially noise can be eliminated, make the user voice after noise reduction will not distortion, sound and becoming apparent from, there is simple in construction, production cost is low, the advantages such as noise reduction efficacy height and tonequality will not change.
Accompanying drawing explanation
Fig. 1 is the workflow schematic diagram of a kind of embodiment of the present invention.
Fig. 2 is the workflow schematic diagram of the another kind of embodiment of the present invention.
Fig. 3 is the structural representation of embodiment shown in Fig. 1.
Fig. 4 is the structural representation of embodiment shown in Fig. 2.
Wherein: 1. sound shield shell; 11. the first sound inlet; 12. the second sound inlet; 21. the first miaow head; 22. the second miaow head; 3. volume contrast module; 4. the first noise reduction module; 5. memory module; 6. frequency contrast module; 7. the second noise reduction module.
Detailed description of the invention
In describing the invention, it will be appreciated that, in term, the orientation of the instruction such as " " center ", " on ", D score, "front", "rear", "left", "right" or position relationship be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention. Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " connection ", " being connected " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be that dismounting connects, or connect integratedly; Can be mechanically connected, it is also possible to be electrical connection; Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to concrete condition understands the above-mentioned term concrete meaning in the present invention. Additionally, in describing the invention, except as otherwise noted, " multiple ", " some " are meant that two or more.
The present invention provide a kind of adopt many miaows head eliminate noise method, flow chart shown in Figure 1, including:
Step 101: receive the first acoustical signal from first direction;
Step 102: receive the second sound signal from the second direction different with described first direction;
Step 103: the wave volume in described first acoustical signal and described second sound signal contrasts, carries out volume noise reduction process by the acoustical signal that described first acoustical signal is identical with volume in described second sound signal;
Step 104: sound frequency when storage people speaks, the sound frequency of storage contrasts with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process.
In this method, described first direction and described second direction in opposite direction, user's one's voice in speech is just to described first direction. When people speaks, audio frequency range is greater than arriving equal to 65 hertz between less than or equal to 1100 hertz.
In this method, owing to noise is to transmit from afar, described first acoustical signal is identical with the transmission range of described second sound signal, so the noise ration in described first acoustical signal is essentially identical with the noise ration in described second sound signal. It is to say, when the wave volume in the wave volume in described first acoustical signal with described second sound signal is essentially identical, then it is believed that this sound is exactly noise.
Owing to distance when user speaks is relatively near, namely user's one's voice in speech is from transmitting nearby, and the transmission direction of described first acoustical signal is different with the transmission direction of described second sound signal, the transmission range of described first acoustical signal and described second sound signal differs, so the user voice volume in described first acoustical signal differs with the user voice volume in described second sound signal. It is to say, when the wave volume in the wave volume in described first acoustical signal with described second sound signal differs, then it is believed that this sound is exactly user voice.
In this method, noise reduction process includes volume noise reduction process and frequency noise reduction process, frequency noise reduction process is primarily directed to the noise in frequency not audio frequency range when people speaks, after volume noise reduction process and frequency noise reduction process, substantially can being eliminated by noise, noise reduction process refers to that filtering noise processes.
In this method, it is possible to first carry out volume decrease and make an uproar process, carry out frequency noise reduction process after volume noise reduction process completes again.
In this method, it is also possible to advanced line frequency noise reduction process, after frequency noise reduction process completes, carry out volume noise reduction process again, shown in Figure 2.
In this method, also include distance enlarging mechanism, the transmission range that described distance enlarging mechanism increases between described first acoustical signal and described second sound signal is poor so that the difference of the user voice volume in described first acoustical signal and the user voice volume in described second sound signal increases.
Refer to Fig. 3, Fig. 3 disclosed be a kind of a kind of embodiment of device adopting many miaows head to eliminate noise, including:
More than one first miaow head 21, described first miaow head 21 is for receiving the first acoustical signal from first direction;
More than one second miaow head 22, described second miaow head 22 is for receiving the second sound signal from the second direction different with described first direction;
Volume contrast module 3 and the first noise reduction module 4 being electrically connected with described volume contrast module 3, wave volume in described first acoustical signal and described second sound signal is contrasted by described volume contrast module 3, and the acoustical signal that described first acoustical signal is identical with volume in described second sound signal is carried out volume noise reduction process by described first noise reduction module 4;
Memory module 5, frequency contrast module 6 and the second noise reduction module 7 being electrically connected successively, described memory module 5 is for storing sound frequency when people speaks, described frequency contrast module 6 is for contrasting the sound frequency of storage with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process to described second noise reduction module 7.
In the present embodiment, owing to noise is to transmit from afar, described first acoustical signal is identical with the transmission range of described second sound signal, so the noise ration in described first acoustical signal is essentially identical with the noise ration in described second sound signal. It is to say, when the wave volume in the wave volume in described first acoustical signal with described second sound signal is essentially identical, then it is believed that this sound is exactly noise.
Owing to distance when user speaks is relatively near, namely user's one's voice in speech is from transmitting nearby, and the transmission direction of described first acoustical signal is different with the transmission direction of described second sound signal, the transmission range of described first acoustical signal and described second sound signal differs, so the user voice volume in described first acoustical signal differs with the user voice volume in described second sound signal. That is, when the wave volume in the wave volume in described first acoustical signal with described second sound signal differs, then it is believed that this sound is exactly user voice, when people speaks, audio frequency range is greater than arriving equal to 65 hertz between less than or equal to 1100 hertz.
In the present embodiment, noise reduction process includes volume noise reduction process and frequency noise reduction process, frequency noise reduction process is primarily directed to the noise in frequency not audio frequency range when people speaks, after volume noise reduction process and frequency noise reduction process, substantially can be eliminated by noise.
In the present embodiment, first carry out volume decrease to make an uproar process, carrying out frequency noise reduction process after volume noise reduction process completes again, namely described first miaow head 21 and described second miaow head 22 are electrically connected with described volume contrast module 3 respectively, and described first noise reduction module 4 is electrically connected with described frequency contrast module 6.
In the present embodiment, all right advanced line frequency noise reduction process, volume noise reduction process (shown in Figure 4) is carried out again after frequency noise reduction process completes, described first miaow head 21 and described second miaow head 22 are electrically connected with described frequency contrast module 6 respectively, and described second noise reduction module 7 is electrically connected with described volume contrast module 3.
In the present embodiment, also including sound shield shell 1, described first miaow head 21 and described second miaow head 22 and be arranged in described sound shield shell 1, what the inwall of described sound shield shell 1 adopted is that sound-absorbing material is made. Also including the first sound inlet 11 and the second sound inlet 12, the described first corresponding described first direction of sound inlet 11 is arranged on described sound shield shell 1, and the described second corresponding described second direction of sound inlet 12 is arranged on described sound shield shell 1.
In the present embodiment, also include a demarcation strip (picture), the inner chamber of described sound shield shell 1 is divided into the first sub-inner chamber and the second sub-inner chamber by described demarcation strip, described first miaow head 21 is arranged in described first sub-inner chamber, described second miaow head 22 is arranged in described second sub-inner chamber, so the benefit of design is, in order to prevent described first miaow head 21 from can receive described second sound signal, it is prevented that described second miaow head 22 can receive described first acoustical signal.
In the present embodiment, described first miaow head 21 is or/and described second miaow head 22 is that carbon grain formula miaow head, electromagnetic type miaow head, condenser type miaow head, electret capacitor type miaow head, piezo crystal miaow head, piezoelectric ceramic type miaow head are or/and silicon dioxide formula miaow head.
In the present embodiment, described first direction and described second direction in opposite direction, user's one's voice in speech is just to described first direction, described first miaow head 21 and the described second spaced certain distance of miaow head 22, so the benefit of design is to make the user voice volume that the user voice volume that described first miaow head 21 receives receives more than described second miaow head 22.
In the present embodiment, also include distance enlarging mechanism (picture), the transmission range that described distance enlarging mechanism increases between described first acoustical signal and described second sound signal is poor so that the difference of the user voice volume in described first acoustical signal and the user voice volume in described second sound signal increases.
Described distance enlarging mechanism includes screw mandrel, the manual toggle part that is arranged on described screw mandrel and two nuts being arranged on screw mandrel, described first miaow head 21 and described second miaow head 22 are separately positioned on two described nuts, and described manual toggle part and described screw mandrel are synchronized with the movement. When stirring described manual toggle part with hands, then described screw mandrel rotates, and moving in two close to each other or away from each other directions of described nut, the distance between described first miaow head 21 and described second miaow head 22 reduces or increases. Described manual toggle part can replace with motor, that is described motor drives described screw mandrel to rotate, so have only to described motor and just can regulate the distance between described first miaow head 21 and described second miaow head 22, also include controlling switch, the work of motor described in described control on-off control.
In the present embodiment, also include micro wind turbine generator (picture), storage battery (picture) and the LED (picture) being electrically connected with described storage battery, described micro wind turbine generator is arranged in described sound shield shell 1, when described first sound inlet 11 is just spoken by user, the air-flow produced will make the wheel rotation of described micro wind turbine generator, so described micro wind turbine generator will generate electricity, and the electric current of generation is stored in described storage battery, described LED will be luminous, the luminescence of described LED can be used to remind user, its direction spoken is just to described first sound inlet 11, so can ensure that noise reduction. described storage battery, described control switch and described motor are electrically connected successively, and described storage battery is described control switch, described motor, described first miaow head 21, described second miaow head 22, described volume contrasts module 3, described first noise reduction module 4, described memory module 5, described frequency contrast module 6 and described second noise reduction module 7 provides electric energy.
Due to the fact that and have employed described first miaow head 21 and described second miaow head 22, described first miaow head 21 is used for receiving described first acoustical signal, described second miaow head 22 is used for receiving described second sound signal, described first acoustical signal and described second sound signal are carried out volume noise reduction process and frequency noise reduction process by described first noise reduction module 4 and described second noise reduction module 7 respectively, after volume noise reduction process and frequency noise reduction process, substantially noise can be eliminated, make the user voice after noise reduction will not distortion, sound and becoming apparent from, there is simple in construction, production cost is low, the advantages such as noise reduction efficacy height and tonequality will not change.
Claims (10)
1. one kind adopts the method that many miaows head eliminates noise, it is characterised in that including:
Receive the first acoustical signal from first direction;
Receive the second sound signal from the second direction different with described first direction;
Wave volume in described first acoustical signal and described second sound signal is contrasted, the acoustical signal that described first acoustical signal is identical with volume in described second sound signal is carried out volume noise reduction process;
Sound frequency when storage people speaks, the sound frequency of storage contrasts with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process.
2. the method that employing many miaows head according to claim 1 eliminates noise, it is characterised in that: described first direction and described second direction in opposite direction.
3. the method that employing many miaows head according to claim 1 and 2 eliminates noise, it is characterised in that: when people speaks, audio frequency range is greater than arriving equal to 65 hertz between less than or equal to 1100 hertz.
4. the method that employing many miaows head according to claim 1 and 2 eliminates noise, it is characterised in that: first carry out volume decrease and make an uproar process, after volume noise reduction process completes, carry out frequency noise reduction process again; Or advanced line frequency noise reduction process, carries out volume noise reduction process again after frequency noise reduction process completes.
5. one kind adopts the device that many miaows head eliminates noise, it is characterised in that including:
More than one first miaow head, described first miaow head is for receiving the first acoustical signal from first direction;
More than one second miaow head, described second miaow head is for receiving the second sound signal from the second direction different with described first direction;
Volume contrast module and the first noise reduction module being electrically connected with described volume contrast module, wave volume in described first acoustical signal and described second sound signal is contrasted by described volume contrast module, and the acoustical signal that described first acoustical signal is identical with volume in described second sound signal is carried out volume noise reduction process by described first noise reduction module;
Memory module, frequency contrast module and the second noise reduction module being electrically connected successively, described memory module is for storing sound frequency when people speaks, described frequency contrast module is for contrasting the sound frequency of storage with the sound frequency in described first acoustical signal and described second sound signal, and by described first acoustical signal and described second sound signal medium frequency, the sound outside the audio frequency range of storage carries out frequency noise reduction process to described second noise reduction module.
6. employing many miaows head according to claim 5 eliminates the device of noise, it is characterised in that: described first direction and described second direction in opposite direction.
7. the many miaows head that adopts according to claim 5 or 6 eliminates the device of noise, it is characterized in that: described first miaow head and described second miaow head contrast module with described volume respectively and be electrically connected, and described first noise reduction module is electrically connected with described frequency contrast module.
8. the many miaows head that adopts according to claim 5 or 6 eliminates the device of noise, it is characterized in that: described first miaow head and described second miaow head are electrically connected with described frequency contrast module respectively, described second noise reduction module is electrically connected with described volume contrast module.
9. the many miaows head that adopts according to claim 5 or 6 eliminates the device of noise, it is characterised in that: also include sound shield shell, described first miaow head and described second miaow head and be arranged in described sound shield shell.
10. employing many miaows head according to claim 9 eliminates the device of noise, it is characterized in that: also include the first sound inlet and the second sound inlet, the corresponding described first direction of described first sound inlet is arranged on described sound shield shell, and the corresponding described second direction of described second sound inlet is arranged on described sound shield shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610104985.1A CN105635866A (en) | 2016-02-26 | 2016-02-26 | Method and device for removing noise by adopting multiple microphones |
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| CN201610104985.1A CN105635866A (en) | 2016-02-26 | 2016-02-26 | Method and device for removing noise by adopting multiple microphones |
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| CN110648612A (en) * | 2018-06-26 | 2020-01-03 | 乐金显示有限公司 | Display device |
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