CN206531111U - The lampblack absorber that a kind of active abates the noise - Google Patents
The lampblack absorber that a kind of active abates the noise Download PDFInfo
- Publication number
- CN206531111U CN206531111U CN201621467083.6U CN201621467083U CN206531111U CN 206531111 U CN206531111 U CN 206531111U CN 201621467083 U CN201621467083 U CN 201621467083U CN 206531111 U CN206531111 U CN 206531111U
- Authority
- CN
- China
- Prior art keywords
- noise
- noise reduction
- loudspeaker
- parsing
- 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.)
- Active
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
It is described including microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, wire interface, bluetooth module, power supply and control module the utility model discloses the lampblack absorber that a kind of active abates the noise.The active noise reduction of the pluggable line, pass through the noise in microphone pickup monitoring unit monitors environment, noise signal is reached into parsing noise reduction pio chip, de-noising signal instruction is sent after parsing noise reduction pio chip operational analysis, noise is offset by loudspeaker is sent with noise opposite in phase, amplitude identical sound wave.The problem of efficiently solving low frequency noise, can lift tonequality, with compact and flexible, the characteristics of with opening, and can have very long stand-by time by using Low-power Technology scheme.
Description
Technical field
The utility model is related 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, the quickening of work rhythm increasingly so that people are required in work, study, rest
More quiet comfortable environment, therefore noise pollution has become the main factor of influence people's quality of life, in noise pollution
It is increasingly serious that people can only stand noise, and physical and mental health is impacted, and then people begin look for noise reduction measure instantly,
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, and cost is higher.
Traditional noise reduction mode to a certain extent isolates noise mainly by good seal and material property.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 handled, 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, noise is detected and amplitude same phase therewith is produced by noise reduction module drive the speaker
Opposite sound wave is offseted therewith, so as to realize good noise reduction.
Utility model content
For above-mentioned weak point of the prior art, the utility model provides the oil smoke that a kind of active abates the noise
Machine, the problem of solving the low-frequency noise described in background technology ensures enough continuation of the journey duration using Low-power Technology, with
It is compact portable with opening.
To realize above-mentioned technique effect, the technical solution adopted in the utility model is the oil smoke that a kind of active abates the noise
Machine, including housing, it is characterised in that：Enclosure interior is provided with microphone pickup monitoring unit, parsing noise reduction pio chip, raised one's voice
Device, wire interface, bluetooth module, power supply and control module；The microphone pickup monitoring unit exports core by parsing noise reduction
Piece is connected with loudspeaker, bluetooth and control module respectively, and the parsing noise reduction pio chip monitors single with microphone pickup respectively
Member, loudspeaker, wire interface, bluetooth module, power supply and control module connection, the loudspeaker are monitored with microphone pickup respectively
Unit, parsing 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, electricity
Source and control module are connected with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, wire interface respectively.
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 after parsing noise reduction pio chip operational analysis, by loudspeaker
Send with noise opposite in phase, amplitude identical sound wave to offset noise.The problem of efficiently solving low frequency noise, can be lifted
Tonequality, with compact and flexible, the characteristics of with opening, can there is very long stand-by time by 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.
It is preferred that, the wire interface can be plugged freely, i.e., can be worked under wireless status and cable status.
It is preferred that, the noise reduction can recognize ambient noise and send identical with ambient noise amplitude, opposite in phase
Reverse acoustical signal carries out counteracting neutralization.
It is preferred that, bluetooth module is attached and operated by way of bluetooth connection.
It is preferred that, the control module can be operated by way of button and remote control.
It is preferred that, 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, wired multi-tap is set below housing, and user can connect wired audition in the case of battery short of electricity
It is happy.In wireless wear, decrease of noise functions can be opened and listen music or isolate outside noise separately as noise reduction.
Compared with feed forward type structure, reaction type active noise reduction structure is needed to the position of microphone and loudspeaker more accurately
Calculate.Noise reduction influence of the distance of microphone and loudspeaker on system is very big.The distance between microphone and loudspeaker are led
Phase difference between noise signal and the noise signal of loudspeaker playback that cause microphone is received, 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 serious noise of uttering long and high-pitched sounds.
The utility model uses a kind of Dolby circuit filter design method model based on feed forward type structure：Noise is from by wheat
The capture of gram wind and duct is passed to by signal transacting to loudspeaker playback again must be with noise from outside through incoming duct holding again
Unanimously.
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 the biography letter and loudspeaker of noise to microphone are penetrated to the biography letter antiphase of human ear with noise
Reach that the biography letter of human ear subtracts each other, that is, obtain the biography letter data model of Dolby circuit filtering.Measured by these, noise reduction can be designed
The wave filter of circuit, with decay and delay of the circuit compensation caused by, 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
Parse noise reduction pio chip, through parse noise reduction pio chip operational analysis after send de-noising signal instruction, by loudspeaker send with
Noise opposite in phase, amplitude identical sound wave offset noise.The active noise reduction of the pluggable line, efficiently solves soundproof effect
The problem of limited and poor acoustical quality, tonequality can be lifted, with compact and flexible, the characteristics of with opening, by using low work(
Consumption technical scheme can have very long stand-by time.
Brief description of the drawings
Fig. 1 is the utility model structured flowchart；
Fig. 2 is denoising structure schematic diagram of the present utility model；
Fig. 3 is denoising structure schematic diagram of the present utility model；
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.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Fig. 1-3 are referred to, the utility model provides a kind of technical scheme：The lampblack absorber that a kind of active abates the noise, it is described
Microphone pickup monitoring unit 1, parsing noise reduction pio chip 2, loudspeaker 3, wire interface 4, bluetooth mould are installed inside noise reduction
Block 5, control module 6 and power module 7.The microphone pickup monitoring unit 1 is by parsing noise reduction pio chip 2 respectively with raising
Sound device 3, bluetooth 5 and control module connection 6, the parsing noise reduction pio chip 2 respectively with microphone pickup monitoring unit 1, raise
Sound device 3, wire interface 4, bluetooth module 5, control module 6 and power module 7 are connected, and the loudspeaker 3 is picked up with microphone respectively
Sound monitoring unit 1, parsing noise reduction pio chip 2, wire interface 4, bluetooth module 5, control module 6 and power module 7 are connected, institute
State wire 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 are connected, and the bluetooth module 5, control module 6 and power module 7 monitor single with microphone pickup respectively
Member 1, parsing noise reduction pio chip 2, loudspeaker 3, wire interface 4 are connected.
Operation principle：The real-time noise information monitored is communicated to parsing noise reduction output by microphone pickup monitoring unit 1
Chip 2, after parsing noise reduction pio chip 2 is parsed to noise, transmission order makes loudspeaker 3 send the sound opposite with noise waveform
Ripple；Wire interface 4 senses the state of interface, and data are communicated into parsing noise reduction pio chip 2 and bluetooth module 5 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 not opening active noise reduction, in passive noise reduction state, a noise
Source NS sends noise and passes 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 is handled by speaker output signal BS, drop as the input signal of the Dolby circuit of connection microphone by Dolby circuit
The 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 (- S)-BS of loudspeaker to human ear；To be reached at human ear
To noise cancellation effect, then the signal E (- S) that loudspeaker output reaches human ear by duct need to be passed through with noise is delivered to human ear
Signal NS, amplitude same phase is on the contrary, be designated as E (- S)=- ES.Thus, the transfer function H 2S of Dolby circuit filtering 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 the transfer function H 2S for detecting and calculating.
Embodiment of the present utility model can have two kinds to wear setting, and one kind is to open active noise reduction function, another to be
It is only passive noise reduction to close active noise reduction function.
As shown in Fig. 5 Bode diagram, 80dB very noisies 12, when not opening active noise reduction function, noise source to human ear are received
16 actually measured transfer function is curve 13, and when opening active noise reduction function, noise source passes through L channel to human ear 16
Actually measured transfer function is curve 14, and the actually measured transfer function that noise source reaches human ear 16 by R channel is bent
Line 15.It can be seen that the noise 13 or 14 obtained at the low-frequency range in 1kHz once, the human ear 16 when opening active noise reduction function
15 are reduced during than not opening active noise reduction and arrives 20dB, active noise reduction effect is notable.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
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 with loudspeaker, bluetooth and control module respectively by parsing noise reduction pio chip, 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 is connected, 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 can be recognized
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 operated.
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：Also include charging panel, fill
Electroplax is embedded on housing, and charging wire can be connected by charging inlet to the power source charges in cavity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016209125897 | 2016-08-20 | ||
| CN201620912589 | 2016-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206531111U true CN206531111U (en) | 2017-09-29 |
Family
ID=59920668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621467083.6U Active CN206531111U (en) | 2016-08-20 | 2016-12-29 | The lampblack absorber that a kind of active abates the noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206531111U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642262A (en) * | 2016-08-20 | 2017-05-10 | 中声科技（北京）有限公司 | Range hood capable of initiatively eliminating noise |
| 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 |
-
2016
- 2016-12-29 CN CN201621467083.6U patent/CN206531111U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642262A (en) * | 2016-08-20 | 2017-05-10 | 中声科技（北京）有限公司 | Range hood capable of initiatively eliminating noise |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106535050A (en) | Active noise reduction module eliminating automobile noise | |
| CN106766086A (en) | The air-conditioning that a kind of active abates the noise | |
| CN106642262A (en) | Range hood capable of initiatively eliminating noise | |
| CN106792316B (en) | A kind of industrial active noise reduction earmuff | |
| GB2434708B (en) | Ambient noise reduction arrangements | |
| DE602004015242D1 (en) | Noise-matching device, use of same and noise matching method | |
| CN203243413U (en) | Anti-eavesdropping and recording blocker device | |
| CN204578728U (en) | A kind of active noise reduction earphone | |
| CN107343235A (en) | It is a kind of can plug earphone cord active noise reduction earphone | |
| CN209234033U (en) | A kind of active noise reduction earphone | |
| CN207150781U (en) | A kind of active noise reduction earphone of pluggable earphone line | |
| CN106782488A (en) | The washing machine that a kind of active abates the noise | |
| CN206531111U (en) | The lampblack absorber that a kind of active abates the noise | |
| CN103428593B (en) | The device of audio signal is gathered based on speaker | |
| CN203840513U (en) | Active noise reduction controller | |
| CN106740332A (en) | A kind of active eliminates the automobile headrest of in-car noise | |
| CN206585742U (en) | The mattress that a kind of active abates the noise | |
| CN202310066U (en) | Low-frequency denoising control device for denoising earphone | |
| CN201073167Y (en) | Noise canceling pillow | |
| CN207460471U (en) | A kind of active noise reduction module for eliminating car noise | |
| CN202798855U (en) | Microphone circuit module with reverberation and monitoring functions | |
| CN203351193U (en) | Portable karaoke Bluetooth headset capable of monitoring MIC signal | |
| CN106499224A (en) | A kind of active noise reduction telephone booth for eliminating ambient noise | |
| CN106510350A (en) | Headrest for actively eliminating noise | |
| CN106535051A (en) | Mattress for active noise cancellation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180528 Address after: 312000 Yueling Township, Yuecheng Township, Yuecheng Town, Shaoxing, Zhejiang Patentee 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 Patentee before: SERES ACOUSTIC TECHNOLOGY (BEIJING) CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 144 Renmin West Road, Tashan Street, Yuecheng District, Shaoxing City, Zhejiang Province, 312000 Patentee after: Shengyang Holding Group Co.,Ltd. Address before: 312000 Yueling Township, Yuecheng Township, Yuecheng Town, Shaoxing, Zhejiang Patentee before: Shaoxing Shengyang Electrical Appliance Co.,Ltd. |
|
| CP03 | Change of name, title or address |