CN207150781U - A kind of active noise reduction earphone of pluggable earphone line - Google Patents
A kind of active noise reduction earphone of pluggable earphone line Download PDFInfo
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- CN207150781U CN207150781U CN201621467116.7U CN201621467116U CN207150781U CN 207150781 U CN207150781 U CN 207150781U CN 201621467116 U CN201621467116 U CN 201621467116U CN 207150781 U CN207150781 U CN 207150781U
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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 a kind of active noise reduction earphone of pluggable earphone line.The active noise reduction earphone of the pluggable earphone 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, is sent by loudspeaker with noise opposite in phase, amplitude identical sound wave to offset noise.Low frequency noise is solve thed problems, such as, earphone tonequality can be lifted, has compact and flexible, the characteristics of with opening, there can be very long stand-by time by using Low-power Technology scheme.
Description
Technical field
Acoustic noise reduction technical field is the utility model is related to, specially a kind of active noise reduction earphone of pluggable earphone line.
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
Instantly, people can only endure noise to getting worse, or improve earpiece volume to cover noise, and shadow is caused to physical and mental health
Ring, then people begin look for noise reduction measure, such as passive noise reduction, that is, utilize the physics material that quality is higher, soundproof effect is better
Material shielding noise, this method are only effective to high frequency sounds, it is impossible to reduce low frequency noise, and noise reduction capability is only capable of reducing about
15 to 20 decibels, cost is higher.
Traditional noise cancelling headphone belongs to passive noise cancelling headphone, and it is mainly by good seal and material property in certain journey
Noise is isolated on degree.Passive noise reduction can only typically be directed to the sound of more than 500Hz higher frequencies, especially in more than 1KHz
Noise, passive noise cancelling headphone has certain noise reduction capability, but goes for more preferable noise reduction, and to low frequency noise
Handled, then need to pay great material engineering cost.Active noise reduction earphone is combined with acoustics and electricity is theoretical, uses
The method of the anti-phase cancellation of Active noise, by installing active noise reduction module in earphone cavity, detect noise and pass through noise reduction mould
Block drive the speaker produces the opposite sound wave of amplitude same phase therewith and 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 a kind of the In-Ear of pluggable earphone line
Active noise reduction earphone, support wirelessly solved with wired two kinds of communication modes existing for the noise cancelling headphone described in background technology
Defect, enough continuation of the journey duration is ensured using Low-power Technology, with opening, and greatly reduce earphone volume, it is compact portable.
To realize above-mentioned technique effect, the technical solution adopted in the utility model drops for a kind of active of pluggable earphone line
Make an uproar earphone, including earphone case, it is characterised in that：Microphone pickup monitoring unit, parsing noise reduction are installed inside earphone case
Pio chip, loudspeaker, wire interface, bluetooth module, power supply and control module；The microphone pickup monitoring unit passes through solution
Analysis noise reduction pio chip be connected with loudspeaker, bluetooth and control module respectively, it is described parse noise reduction pio chip respectively with Mike
Wind pickup monitoring unit, loudspeaker, wire interface, bluetooth module, power supply connect with control module, the loudspeaker respectively with wheat
Gram wind pickup monitoring unit, parsing noise reduction pio chip, wire interface, bluetooth module, power supply connect with control module, the line
Material interface is connected with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, bluetooth and control module respectively, institute
State bluetooth module, power supply and control module respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, line
Material interface connects.
The active noise reduction earphone of the pluggable earphone line, by 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,
Sent by loudspeaker with noise opposite in phase, amplitude identical sound wave to offset noise.Low frequency noise is solve thed problems, such as,
Earphone tonequality can be lifted, has compact and flexible, the characteristics of with opening, can be had by using Low-power Technology scheme very long
Stand-by time.Bluetooth module is included on earphone interior circuit board, it is possible to provide audio signal when earphone is wirelessly worn is by player
(mobile phone as being equipped with Bluetooth function) arrives the transmission of earphone.
Preferably, the wire interface can be plugged freely, i.e., can be worked under wireless status and cable status.
Preferably, the noise cancelling headphone can identify ambient noise and send, phase phase identical with ambient noise amplitude
Anti- reverse acoustical signal carries out counteracting neutralization.
Preferably, bluetooth module is attached and 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, the earphone also includes charging panel, and charging panel can be connected on earphone case by charging inlet
Charging wire is to the power source charges in earphone cavity.
Further, wired earphone multi-tap is set below earphone case, and user, can in the case of headset batteries short of electricity
Connection wired earphone listens music.In wireless wear, earphone can open decrease of noise functions listen music or separately as noise cancelling headphone every
From outside noise.
Compared with feed forward type structure, reaction type active noise reduction structure is needed to the position of microphone and loudspeaker more accurately
Calculate.The distance of microphone and loudspeaker influences very big on the noise reduction of system.The distance between microphone and loudspeaker are led
The phase difference between the noise signal that microphone receives and the noise signal that loudspeaker plays back is caused, 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 is simultaneously passed to duct by signal transacting to loudspeaker playback and must be passed to again from earphone outside through earphone with noise again
Duct is consistent.
By the transfer function of measure ambient noise to human ear (referred to as " biography letter "), the biography letter of noise to ear microphone,
Earphone speaker to human ear biography letter, then by the way that noise to ear microphone is passed letter and earphone speaker to the biography letter of human ear
Antiphase and noise, which penetrate earphone and reach the biography letter of human ear, to be subtracted each other, that is, obtains the biography letter data model of Dolby circuit filtering.Pass through
These measurements, can design the wave filter of Dolby circuit, with decay and delay of the circuit compensation caused by earphone, this causes
System is able to produce into anti-phase noise signal, for offsetting the noise for penetrating human ear after earphone and really hearing.
Compared with prior art, the beneficial effects of the utility model are：The active noise reduction earphone of the pluggable earphone line, lead to
The noise crossed in microphone pickup monitoring unit monitors environment, noise signal is reached into parsing noise reduction pio chip, dropped through parsing
Make an uproar and de-noising signal instruction is sent after pio chip operational analysis, sent and noise opposite in phase, amplitude identical sound by loudspeaker
Ripple offsets noise.The active noise reduction earphone of the pluggable earphone line, efficiently solves that earphone soundproof effect is limited and earphone sound
The problem of matter effect difference, earphone tonequality can be lifted, have it is compact and flexible, the characteristics of with opening, by using low-power consumption skill
Art scheme can have very long stand-by time.
Brief description of the drawings
Fig. 1 is the block diagram of the utility model；
Fig. 2 is noise cancelling headphone structural representation of the present utility model；
Fig. 3 is noise cancelling headphone structural representation 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 embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, 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, belong to the scope of the utility model protection.
Fig. 1-3 are referred to, the utility model provides a kind of technical scheme：A kind of active noise reduction ear of pluggable earphone line
Machine, microphone pickup monitoring unit 1, parsing noise reduction pio chip 2, loudspeaker 3, wire rod are installed inside the noise cancelling headphone and connect
Mouth 4, bluetooth module 5, control module 6 and power module 7.The microphone pickup monitoring unit 1 exports core by parsing noise reduction
Piece 2 is connected 6 with loudspeaker 3, bluetooth 5 and control module respectively, and the parsing noise reduction pio chip 2 is supervised with microphone pickup respectively
Control unit 1, loudspeaker 3, wire interface 4, bluetooth module 5, control module 6 and power module 7 connect, and the loudspeaker 3 is distinguished
With microphone pickup monitoring unit 1, parsing noise reduction pio chip 2, wire interface 4, bluetooth module 5, control module 6 and power supply mould
Block 7 connects, the 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 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 monitored is communicated to parsing noise reduction output by microphone pickup monitoring unit 1
Chip 2, after parsing noise reduction pio chip 2 parses 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 ") wears earphone, and when not opening active noise reduction, earphone is in passive drop
Make an uproar state, a noise source NS sends noise and passes through air, and earphone and duct are communicated to human ear, sound testing instrument used at human ear
Sound waveform data ES herein is detected, so transfer function H 0S=ES-NS of the noise source to human ear；It is embedding when opening active noise reduction
Enter and receive noise signal AS herein away from the microphone at ear chamber in earphone, the transmission function of noise source to microphone is H1S=
AS-NS；The AS signals that microphone receives as connection microphone Dolby circuit input signal, by Dolby circuit handle by
Speaker output signal BS, the transfer function H 2S=BS-AS of Dolby circuit；Loudspeaker is located inside earphone near ear chamber
Place, the signal of output reach human ear by duct, and the signal that human ear detects is E (- S), the transmission function of loudspeaker to human ear
H3S=E (- S)-BS；To reach noise cancellation effect at human ear, then loudspeaker output reaches the signal E of human ear by duct
(- S) need to be delivered to the signal NS of human ear with noise through earphone, and amplitude same phase is on the contrary, be designated as E (- S)=- ES.Thus,
The transfer function H 2S=-H0S-H1S-H3S of Dolby circuit filtering can be calculated, wherein, ES is transmission function of the noise to human ear,
H1S is transfer function of the noise to microphone on the outside of earphone, and H3S is transmission function of the earphone speaker to human ear.According to detection
Noise reduction filtering circuit is designed with the transfer function H 2S that calculates.
Embodiment of the present utility model can have two kinds to wear setting, and one kind is to open active noise reduction function, and another kind is
Close active noise reduction function and there was only passive noise reduction.
As shown in Fig. 5 Bode diagram, earphone receives 80dB very noisies 12, when earphone does not open active noise reduction function, noise
Source is curve 13 to the actually measured transfer function of human ear 16, and when earphone opens active noise reduction function, noise source passes through left sound
Road is curve 14 to the actually measured transfer function of human ear 16, and noise source reaches the actually measured of human ear 16 by R channel
Transfer function is curve 15.It can be seen that the low-frequency range in 1kHz once, obtained at the human ear 16 when opening active noise reduction function
Noise 13 or 14 than reducing 15 when not opening active noise reduction and arriving 20dB, active noise reduction significant effect.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (3)
1. a kind of active noise reduction earphone of pluggable earphone line, including earphone case, it is characterised in that：Installed inside earphone case
There are microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, wire interface, bluetooth module, power supply and control mould
Block；
The microphone pickup monitoring unit is connected with loudspeaker, bluetooth and control module respectively by parsing noise reduction pio chip
Connect,
The parsing noise reduction pio chip respectively with microphone pickup monitoring unit, loudspeaker, wire interface, bluetooth module, electricity
Source connects with control module,
The loudspeaker respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, wire interface, bluetooth module, electricity
Source connects with control module,
The wire interface respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, loudspeaker, bluetooth and control mould
Block is connected, and the wire interface can be plugged freely, i.e., can wirelessly be worked with cable status, wire interface sensing interface
State, data are communicated to parsing noise reduction pio chip and bluetooth module and sends noise reduction to cooperate with and instructs to loudspeaker；
The bluetooth module, power supply and control module respectively with microphone pickup monitoring unit, parsing noise reduction pio chip, raise one's voice
Device, wire interface connection, the bluetooth module are attached and operated by way of bluetooth connection,
Bluetooth module is included on earphone interior circuit board, it is possible to provide audio signal when earphone is wirelessly worn is by player to earphone
Transmission,
Wired earphone multi-tap is set below the earphone case, and user can connect wired in the case of headset batteries short of electricity
Earphone listens music, and in wireless wear, earphone can open decrease of noise functions and listen music or be made an uproar separately as the noise cancelling headphone isolation external world
Sound,
The noise cancelling headphone can identify ambient noise and send reverse sound letter identical with ambient noise amplitude, opposite in phase
Number carry out counteracting neutralization.
A kind of 2. active noise reduction earphone of pluggable earphone line according to claim 1, it is characterised in that：The power supply mould
Block is common to directly power supply and battery.
A kind of 3. active noise reduction earphone of pluggable earphone line according to claim 1, it is characterised in that：The earphone is also
Including charging panel, charging panel can connect charging wire by charging inlet and be filled to the power supply in earphone cavity on earphone case
Electricity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620915028 | 2016-08-20 | ||
| CN2016209150282 | 2016-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207150781U true CN207150781U (en) | 2018-03-27 |
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ID=61658565
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621467116.7U Active CN207150781U (en) | 2016-08-20 | 2016-12-29 | A kind of active noise reduction earphone of pluggable earphone line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109275060A (en) * | 2018-11-29 | 2019-01-25 | 深圳聚米科技有限公司 | A kind of high tone quality intelligent wireless Internet of Things earphone |
| CN110139179A (en) * | 2018-03-29 | 2019-08-16 | 诸爱道 | Noise reduction anti-radiating earphone |
| CN110267139A (en) * | 2019-06-12 | 2019-09-20 | 郭军伟 | A kind of intelligence voice identification noise filtering earphone |
-
2016
- 2016-12-29 CN CN201621467116.7U patent/CN207150781U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139179A (en) * | 2018-03-29 | 2019-08-16 | 诸爱道 | Noise reduction anti-radiating earphone |
| CN109275060A (en) * | 2018-11-29 | 2019-01-25 | 深圳聚米科技有限公司 | A kind of high tone quality intelligent wireless Internet of Things earphone |
| CN110267139A (en) * | 2019-06-12 | 2019-09-20 | 郭军伟 | A kind of intelligence voice identification noise filtering earphone |
| CN110267139B (en) * | 2019-06-12 | 2024-04-12 | 郭军伟 | Intelligent voice recognition noise filtering earphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180523 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. |
|
| CP03 | Change of name, title or address | ||
| 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. |