CN106642262A - Range hood capable of initiatively eliminating noise - Google Patents
Range hood capable of initiatively eliminating noise Download PDFInfo
- Publication number
- CN106642262A CN106642262A CN201611247326.XA CN201611247326A CN106642262A CN 106642262 A CN106642262 A CN 106642262A CN 201611247326 A CN201611247326 A CN 201611247326A CN 106642262 A CN106642262 A CN 106642262A
- Authority
- CN
- China
- Prior art keywords
- noise
- noise reduction
- loudspeaker
- monitoring unit
- abates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a range hood capable of initiatively eliminating noise. The range hood comprises a microphone pickup monitoring unit, an analysis noise reduction output chip, a loudspeaker, a wire connector, a Bluetooth module, a power source and a control module. Wire-pluggable initiative noise reduction is conducted, the microphone pickup monitoring unit monitors noise in the environment to transmit a noise signal to the analysis noise reduction output chip, after the noise signal is subjected to operational analysis of the analysis noise reduction output chip, a noise reduction signal instruction is sent out, and the loudspeaker is used for sending out sound waves for counteracting noise, wherein the phases of the noise and the sound waves are opposite, and the amplitudes of the noise and the sound waves are the same. The problem of low-frequency noise is effectively solved, the sound quality can be improved, the range hood has the beneficial effects of being small, exquisite, flexible and capable of being turned on immediately when needing to be used, and very long standby time can be available by adopting a low-power-consumption technical scheme.
Description
Technical field
The present invention relates to acoustic noise reduction technical field, the lampblack absorber that specially a kind of active abates the noise.
Background technology
Modern society is with life, work rhythm quickening increasingly so that people are required in work, study, rest
More quiet comfortable environment, therefore noise pollution has become the factor for affecting people's quality of life main, in noise pollution
It is increasingly serious that instantly people can only stand noise, and physical and mental health is impacted, and then people begin look for noise reduction measure,
Such as passive noise reduction, i.e., using the physical material shielding noise that quality is higher, soundproof effect is better, this method is only to high-frequency
Sound is effective, it is impossible to reduce low frequency noise, and noise reduction capability is only capable of about 15 to 20 decibels of reduction, relatively costly.
Traditional noise reduction mode to a certain extent isolates noise mainly by good seal and material behavior.Passively
Noise reduction can only typically be directed to the sound of more than 500Hz higher frequencies, and especially for the noise in more than 1KHz, passive noise reduction has one
Fixed noise reduction capability, but more preferable noise reduction is gone for, and low frequency noise is processed, then need to pay greatly
Material engineering cost.Active noise reduction is combined with acoustics and electricity is theoretical, using the method for the anti-phase cancellation of Active noise, passes through
Active noise reduction module is installed in cavity, is detected noise and amplitude same phase therewith is produced by noise reduction module drive the speaker
Contrary sound wave is offseted therewith, so as to realize good noise reduction.
The content of the invention
For above-mentioned weak point of the prior art, the invention provides the lampblack absorber that a kind of active abates the noise, solution
The problem of the low-frequency noise determined described in background technology, using Low-power Technology enough continuation of the journey duration is ensured, with opening,
It is compact portable.
To realize above-mentioned technique effect, the technical solution used in the present invention is the lampblack absorber that a kind of active abates the noise, bag
Include housing, it is characterised in that：Enclosure interior is provided with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, line
Material interface, bluetooth module, power supply and control module；The microphone pickup monitoring unit is by parsing noise reduction pio chip difference
Be connected with loudspeaker, bluetooth and control module, the parsing noise reduction pio chip respectively with microphone pickup monitoring unit, raise one's voice
Device, wire interface, bluetooth module, power supply and control module connection, the loudspeaker respectively with microphone pickup monitoring unit, solution
Analysis noise reduction pio chip, wire interface, bluetooth module, power supply and control module connection, the wire interface respectively with microphone
Pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, bluetooth and control module connection, the bluetooth module, power supply and control
Molding block is connected respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, wire interface.
The active noise reduction of the pluggable line, by the noise in microphone pickup monitoring unit monitors environment, noise is believed
Parsing noise reduction pio chip number is reached, de-noising signal instruction is sent Jing after parsing noise reduction pio chip operational analysis, by loudspeaker
Send with noise opposite in phase, amplitude identical sound wave to offset noise.Low frequency noise is efficiently solved the problems, such as, can be lifted
Tonequality, with compact and flexible, the characteristics of with opening, by having very long stand-by time using Low-power Technology scheme.It is blue
Tooth module is included on circuit board, it is possible to provide audio signal when wirelessly wearing is by the player (hand as being equipped with Bluetooth function
Machine) transmission arrived.
Preferably, the wire interface can be plugged freely, i.e., can work under wireless status and cable status.
Preferably, the noise reduction is capable of identify that ambient noise and sends identical with ambient noise amplitude, opposite in phase
Reversely acoustical signal carries out counteracting neutralization.
Preferably, bluetooth module is attached and is operated by way of bluetooth connection.
Preferably, the control module can be operated by way of button and remote control.
Preferably, the power module is common to directly power supply and battery.
Further, described also to include charging panel, charging panel is embedded on housing, can be connected charging wire by charging inlet and be given
Power source charges in cavity.
Further, housing lower section arranges wired multi-tap, and user can connect wired audition in the case of battery short of electricity
It is happy.When wirelessly wearing, decrease of noise functions can be opened and listened music or isolated outside noise separately as noise reduction.
Compared with feed forward type structure, reaction type active noise reduction structure needs the position to microphone and loudspeaker more accurately
Calculate.The distance of microphone and loudspeaker affects very big to the noise reduction of system.The distance between microphone and loudspeaker are led
Phase difference between the noise signal that the noise signal and loudspeaker that cause microphone is received is played back, and phase difference is with sound frequency
Raise and increase, once phase difference is more than 60 degree, negative-feedback will become positive feedback, be readily incorporated and seriously utter long and high-pitched sounds noise.
The present invention adopts a kind of Dolby circuit filter design method model based on feed forward type structure：Noise is from by microphone
Capturing and pass to duct again to loudspeaker playback by signal transacting must be consistent with noise from outside through incoming duct again.
By the transfer function (referred to as " biography letter ") of measure ambient noise to human ear, the biography letter of noise to microphone is raised one's voice
Device to human ear biography letter, then by the way that pass letter and the loudspeaker of noise to microphone are penetrated to the biography letter antiphase of human ear with noise
The biography letter for reaching human ear subtracts each other, that is, obtain the biography letter data model of Dolby circuit filtering.By these measurements, noise reduction can be designed
The wave filter of circuit, with circuit compensation due to caused decay and time delay, this causes system to be able to produce into anti-phase noise signal,
The noise that rear human ear is really heard is penetrated for offsetting.
Compared with prior art, by the noise in microphone pickup monitoring unit monitors environment, noise signal is reached
Parsing noise reduction pio chip, Jing parsing noise reduction pio chip operational analysis after send de-noising signal instruction, by loudspeaker send with
Noise opposite in phase, amplitude identical sound wave are offsetting noise.The active noise reduction of the pluggable line, efficiently solves soundproof effect
The poor problem of limited and acoustical quality, can lift tonequality, with compact and flexible, the characteristics of with opening, by using low work(
Consumption technical scheme can have very long stand-by time.
Description of the drawings
Fig. 1 is present configuration block diagram；
Fig. 2 is the denoising structure schematic diagram of the present invention；
Fig. 3 is the denoising structure schematic diagram of the present invention；
Fig. 4 is Dolby circuit filter design method model；
Fig. 5 is sound Bode diagram.
In figure：1 microphone pickup monitoring unit, 2 parsing noise reduction pio chips, 3 loudspeakers, 4 wire interfaces, 5 bluetooth moulds
Block, 6 control modules, 7 power modules.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-3 are referred to, the present invention provides a kind of technical scheme：The lampblack absorber that a kind of active abates the noise, the noise reduction
Inside be provided with microphone pickup monitoring unit 1, parsing noise reduction pio chip 2, loudspeaker 3, wire interface 4, bluetooth module 5,
Control module 6 and power module 7.The microphone pickup monitoring unit 1 by parsing noise reduction pio chip 2 respectively with loudspeaker
3rd, bluetooth 5 and control module connection 6, the parsing noise reduction pio chip 2 respectively with microphone pickup monitoring unit 1, loudspeaker
3rd, wire interface 4, bluetooth module 5, control module 6 and power module 7 connect, and the loudspeaker 3 is supervised respectively with microphone pickup
Control unit 1, parsing noise reduction pio chip 2, wire interface 4, bluetooth module 5, control module 6 and power module 7 connect, the line
Material interface 4 respectively with microphone pickup monitoring unit 1, parsing noise reduction pio chip 2, loudspeaker 3, bluetooth module 5, control module
6 and power module 7 connect, the bluetooth module 5, control module 6 and power module 7 respectively with microphone pickup monitoring unit 1,
Parsing noise reduction pio chip 2, loudspeaker 3, wire interface 4 connect.
Operation principle：The real-time noise information for monitoring is communicated to parsing noise reduction output by microphone pickup monitoring unit 1
Chip 2, after parsing noise reduction pio chip 2 is to noise parsing, transmission order makes loudspeaker 3 send the sound contrary with noise waveform
Ripple；Wire interface 4 senses the state of interface, data is communicated into parsing noise reduction pio chip 2 and bluetooth module 5 and is sent with cooperateing with
Noise reduction is instructed to loudspeaker 3.
Dolby circuit filter design method model as shown in Figure 4：
Bionical human ear 16 (hereinafter referred to as " human ear "), when active noise reduction is not opened, in passive noise reduction state, a noise
Source NS sends noise through air, and duct is communicated to human ear, and sound waveform herein is detected with sound testing instrument at human ear
Data ES, so transfer function H 0S=ES-NS of the noise source to human ear；When opening active noise reduction, it is embedded in away from ear chamber
Microphone receives noise signal AS herein, and the transmission function of noise source to microphone is H1S=AS-NS；The AS that microphone is received
Signal, by reason speaker output signal BS at Dolby circuit, drops as the input signal of the Dolby circuit of connection microphone
Transfer function H 2S=BS-AS of noise cancellation circuit；Loudspeaker is internally positioned near at ear chamber, and the signal of output is reached by duct
Human ear, the signal that human ear is detected is E (- S), transfer function H 3S=E (- the S)-BS of loudspeaker to human ear；To reach at human ear
To noise cancellation effect, then loudspeaker output need to be passed through with noise by signal E (- S) that duct reaches human ear and be delivered to human ear
Signal NS, amplitude same phase is conversely, be designated as E (- S)=- ES.Thus, transfer function H 2S that Dolby circuit is filtered can be calculated
=-H0S-H1S-H3S, wherein, ES is transmission function of the noise to human ear, and H1S is transfer function of the noise to outside microphone,
H3S is transmission function of the loudspeaker to human ear.Noise reduction filtering circuit is designed according to transfer function H 2S for detecting and calculating.
Embodiments of the invention can have two kinds to wear setting, and one kind is to open active noise reduction function, and another kind is to close
Active noise reduction function only has passive noise reduction.
As shown in the Bode diagram of Fig. 5,80dB very noisies 12 are received, when not opening active noise reduction function, noise source is to human ear
16 actually measured transfer function is curve 13, and when opening active noise reduction function, noise source is by L channel to human ear 16
Actually measured transfer function is curve 14, and noise source is bent by the actually measured transfer function that R channel reaches human ear 16
Line 15.The low-frequency range once in 1kHz can be seen, the noise 13 or 14 obtained at the human ear 16 when opening active noise reduction function
Reduce during active noise reduction 15 to 20dB than not opening, active noise reduction effect is significant.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. the lampblack absorber that a kind of active abates the noise, including housing, it is characterised in that：Enclosure interior is provided with microphone pickup prison
Control unit, parsing noise reduction pio chip, loudspeaker, wire interface, bluetooth module, power supply and control module；The microphone is picked up
Sound monitoring unit is connected respectively by parsing noise reduction pio chip with loudspeaker, bluetooth and control module, and the parsing noise reduction is defeated
Go out chip to be connected with microphone pickup monitoring unit, loudspeaker, wire interface, bluetooth module, power supply and control module respectively, institute
State loudspeaker respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, wire interface, bluetooth module, power supply and control
Molding block connect, the wire interface respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, bluetooth
With control module connection, the bluetooth module, power supply and control module are defeated with microphone pickup monitoring unit, parsing noise reduction respectively
Go out chip, loudspeaker, wire interface connection.
2. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：The wire interface can be with
Freely plug, i.e., wireless and cable status can work.
3. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：The noise reduction is capable of identify that
Ambient noise and send reverse acoustical signal identical with ambient noise amplitude, opposite in phase and carry out counteracting neutralization.
4. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：The bluetooth module passes through
The mode of bluetooth connection is attached and operates.
5. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：The control module can be with
Operated by way of button and remote control.
6. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：The power module is general
In directly power supply and battery.
7. the lampblack absorber that a kind of active according to claim 1 abates the noise, it is characterised in that：It is described also to include charging
Plate, charging panel is embedded on housing, can connect charging wire to the power source charges in cavity by charging inlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700021 | 2016-08-20 | ||
| CN2016107000213 | 2016-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106642262A true CN106642262A (en) | 2017-05-10 |
Family
ID=58835837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611247326.XA Pending CN106642262A (en) | 2016-08-20 | 2016-12-29 | Range hood capable of initiatively eliminating noise |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702171A (en) * | 2017-10-16 | 2018-02-16 | 北京安声科技有限公司 | A kind of active denoising method applied in lampblack absorber |
| CN108758729A (en) * | 2018-03-30 | 2018-11-06 | 九阳股份有限公司 | A kind of smoke machine method for noise reduction control |
| CN109994097A (en) * | 2017-12-29 | 2019-07-09 | 青岛海尔智能技术研发有限公司 | The noise-reduction method and denoising device of household electrical appliances |
| CN110701648A (en) * | 2018-07-10 | 2020-01-17 | 佛山市顺德区合捷电器实业有限公司 | Noise reduction part and range hood |
| CN111899712A (en) * | 2020-08-13 | 2020-11-06 | 珠海格力电器股份有限公司 | Active noise reduction device and method for range hood |
| CN111964120A (en) * | 2020-09-08 | 2020-11-20 | 珠海格力电器股份有限公司 | Smoke exhaust ventilator |
| CN112151050A (en) * | 2020-08-26 | 2020-12-29 | 宁波方太厨具有限公司 | Sound quality adjusting method for electric appliance noise and range hood |
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| CN206531111U (en) * | 2016-08-20 | 2017-09-29 | 中声科技（北京）有限公司 | The lampblack absorber that a kind of active abates the noise |
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| EP1752712A1 (en) * | 2005-08-10 | 2007-02-14 | Best S.p.a. | Hood with telephonic communication functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107702171A (en) * | 2017-10-16 | 2018-02-16 | 北京安声科技有限公司 | A kind of active denoising method applied in lampblack absorber |
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| CN110701648B (en) * | 2018-07-10 | 2024-05-24 | 佛山市顺德区合捷电器实业有限公司 | Noise reduction component and smoke exhaust ventilator |
| CN111899712A (en) * | 2020-08-13 | 2020-11-06 | 珠海格力电器股份有限公司 | Active noise reduction device and method for range hood |
| CN111899712B (en) * | 2020-08-13 | 2024-03-22 | 珠海格力电器股份有限公司 | Active noise reduction device and method for smoke exhaust ventilator |
| CN112151050A (en) * | 2020-08-26 | 2020-12-29 | 宁波方太厨具有限公司 | Sound quality adjusting method for electric appliance noise and range hood |
| CN112151050B (en) * | 2020-08-26 | 2022-11-11 | 宁波方太厨具有限公司 | Sound quality adjusting method for electric appliance noise and range hood |
| CN111964120A (en) * | 2020-09-08 | 2020-11-20 | 珠海格力电器股份有限公司 | Smoke exhaust ventilator |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180522 Address after: 312000 Yueling Township, Yuecheng Township, Yuecheng Town, Shaoxing, Zhejiang Applicant after: Shaoxing Shengyang Electrical Appliance Co., Ltd. Address before: 100000 Beijing Haidian District Haidian Avenue 34, Hai Ting venture capital building 7 floor - Zhong Sheng Technology Applicant before: China sound technology (Beijing) Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170510 |