CN108600888A - A kind of noise reduction bluetooth headset - Google Patents
A kind of noise reduction bluetooth headset Download PDFInfo
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- CN108600888A CN108600888A CN201810441153.8A CN201810441153A CN108600888A CN 108600888 A CN108600888 A CN 108600888A CN 201810441153 A CN201810441153 A CN 201810441153A CN 108600888 A CN108600888 A CN 108600888A
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- 230000009467 reduction Effects 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000013016 damping Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000741 silica gel Substances 0.000 claims abstract description 6
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 6
- 239000012814 acoustic material Substances 0.000 claims abstract description 4
- 230000007613 environmental effect Effects 0.000 claims description 12
- 230000005236 sound signal Effects 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 241001062009 Indigofera Species 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention proposes a kind of noise reduction bluetooth headset, and the noise reduction bluetooth headset comprises the following modules：Bluetooth module, amplifier module, power management module, inversed module, noise gathering module；Wherein, power management module is direct-connected in bluetooth module, amplifier module, inversed module power supply, and amplifier module forward edge is connected to bluetooth module, is connected with inversed module backward；The noise reduction bluetooth headset can provide two-stage noise reduction and 3 kinds of working methods；The two-stage noise reduction includes：Level-one passive type noise reduction and the active noise reduction of two level；The active noise reduction of level-one surrounds ear using acoustic damping materials and forms enclosure space, or stops ambient noise using silica gel earplugs acoustic material, for eliminating extraneous high frequency noise；The two level active noise reduction acquires the reverse phase sound wave equal with ambient noise, and noise is neutralized, for eliminating extraneous low-frequency noise；3 kinds of operating modes are respectively：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, are realized respectively by Bluetooth switch, noise reduction waved switch；The present invention can effectively eliminate low frequency noise and high frequency noise, and user flexibility can be facilitated to select applicable operating mode in multiple-working mode free switching.
Description
Technical field
The present invention relates to bluetooth headset technical field more particularly to a kind of noise reduction bluetooth headsets.
Background technology
As the popularization of terminal, especially mobile terminal and Bluetooth function is higher and higher, technology is also more and more ripe, blue
The application of tooth earphone is also increasingly extensive.And bluetooth headset not only has the function of the song of listening of common headphones, and there is call function.Mesh
Preceding many people are conversed using bluetooth headset, but when wind is walked greatly or against the wind, strong wind can be directly blown onto bluetooth
Earphone, other side can hear prodigious wind noise when call, can thus influence speech quality.
Noise can be divided into low frequency noise and high frequency noise, only eliminate both noise types simultaneously, be likely to take
Obtain good noise reduction.
Invention content
The purpose of the present invention is to provide a kind of noise reduction bluetooth headsets that can eliminate low frequency noise and high frequency noise simultaneously.
A kind of noise reduction bluetooth headset, comprises the following modules：Bluetooth module, amplifier module, power management module, reverse phase mould
Block, noise gathering module；Wherein, power management module is direct-connected in bluetooth module, amplifier module, inversed module power supply, amplifier mould
Block forward edge is connected to bluetooth module, is connected with inversed module backward；
The noise reduction bluetooth headset can provide two-stage noise reduction and 3 kinds of working methods；
The two-stage noise reduction includes：Level-one passive type noise reduction and the active noise reduction of two level；
The active noise reduction of level-one surrounds ear using acoustic damping materials and forms enclosure space, or uses silica gel earplugs sound insulation
Material blocks ambient noise, for eliminating extraneous high frequency noise；
The two level active noise reduction uses the reverse phase sound wave equal with ambient noise, noise is neutralized, for eliminating the external world
Low-frequency noise；
3 kinds of operating modes are respectively：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, lead to
Cross Bluetooth switch, noise reduction waved switch carrys out implementation pattern switching.
Further, the bluetooth mode is realized by the following method, short-press bluetooth voltage switch, bluetooth booting work
Make, by the frequency multiplication of 26M crystal oscillators, reaches 2.402G-2.480G working frequencies；When receiving data, data pass through antenna
It is connected to chip, to loudspeaker, ANC chips are in pass-through state at this time, do not play any work for output after the demodulation of chip, decoding
With；When transmission data, data packet is sent after the coding of Bluetooth chip, modulation by antenna；And it supports
HFP, HSP, AVRCP, A2DP agreement can be charged by USB line to earphone.
Further, the noise reduction mode is realized by the following method, by stirring noise reduction power switch, earphone into
Enter noise reduction mode, which is made an uproar using FB feedback types FB, and noise reduction chip senses environment at ear by the microphone of left and right cavity
Noise signal, then output phase is opposite, same frequency signal of same magnitude is to loudspeaker, and same environmental noise is sent out by loudspeaker
Signal phase opposite signal offsets environmental noise, to achieve the purpose that noise reduction.
Further, the bluetooth adds noise reduction mode to realize by the following method:Bluetooth, noise reduction power supply are opened respectively
Switch, earphone enter bluetooth noise reduction mode, and bluetooth CSR8635 signals are put by ear after difference turns single-ended, into noise reduction chip, drop
The environmental noise signal that chip of making an uproar receives the audio signal of bluetooth and microphone senses, after Frequency mixing processing, output reduces
The audio signal of noise is to loudspeaker, so that it may to hear perfect noiseless music.
Further, the noise reduction chip is AS3514.
The specific noise reduction operation principle of noise reduction bluetooth headset is as follows：
First by the passive type noise reduction of level-one, realize that the elimination of high frequency noise, realization principle are as follows：Pass through acoustic damping materials
It surrounds ear and forms enclosure space, or stop outside noise using acoustic materials such as silica gel earplugs, for eliminating the external world
High-frequency noise；Then by the active noise reduction of two level, two level noise reduction, the main elimination for eliminating low frequency noise are carried out.Noise reduction system
System generates the reversed sound wave equal with ambient noise, and noise is neutralized, to preferably realize the processing to low frequency noise, enhancing
Noise reduction.
The active noise reduction operation principle of two level is as follows：
Share 3 kinds of operating modes at present：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, respectively
It is realized by Bluetooth switch, noise reduction toggle switch
1. independent bluetooth mode：Short-press bluetooth voltage switch, bluetooth booting work reach blue by the frequency multiplication of 26M crystal oscillators
The required 2.402G-2.480G working frequencies of tooth；When receiving data, data are connected to chip by antenna, pass through
Loudspeaker are given in output after the demodulation of chip, decoding (ANC chips are in pass-through state at this time, do not cut any ice)；Sending number
According to when, data packet is sent after the coding of Bluetooth chip, modulation by antenna；And support HFP, HSP, AVRCP,
The agreements such as A2DP can be charged by USB line to earphone
2. independent noise reduction mode：By stirring noise reduction power switch, earphone enters noise reduction mode, the earphone using FB (after
Feedback formula) noise reduction, AS3514 noise reductions chip sensed the noise signal of environment at ear by the microphone of left and right cavity, then exported
Opposite in phase, same magnitude same frequency signal to loudspeaker, send out the opposite signal of same environmental noise signal phase by loudspeaker
Environmental noise is offset, achieving the purpose that noise reduction.
3. bluetooth adds noise reduction mode：Bluetooth, noise reduction power switch are opened respectively, and earphone enters bluetooth noise reduction mode, bluetooth
CSR8635 signals by ear put difference turn it is single-ended after, into AS3415 noise reduction chips, noise reduction chip receive bluetooth audio letter
Number and the environmental noise signal that senses of microphone export the audio signal for reducing noise to loudspeaker after Frequency mixing processing, so that it may
To hear perfect noiseless music.
Advantageous effects：
The two level Method of Noise that the present invention uses, can eliminate high frequency noise and low frequency noise simultaneously, either listen to music still
Voice communication can ensure clearly signal.
Description of the drawings
Fig. 1 is two level principle of noise reduction figure
Specific implementation mode
Figure of description Fig. 1 gives the two level principle of noise reduction figure of the present invention, real first by the passive type noise reduction of level-one
The elimination of existing high frequency noise, realization principle are as follows：Ear is surrounded by acoustic damping materials and forms enclosure space, or uses silica gel ear
The acoustic materials such as plug stop outside noise, for eliminating extraneous high-frequency noise；
Then by the active noise reduction of two level, two level noise reduction, the main elimination for eliminating low frequency noise are carried out.Noise reduction system
The reverse phase sound wave equal with ambient noise is generated, noise is neutralized, to preferably realize the processing to low frequency noise, is enhanced
Noise reduction.A kind of noise reduction bluetooth headset, it is characterised in that：
The noise reduction bluetooth headset comprises the following modules：Bluetooth module, amplifier module, power management module, inversed module,
Noise gathering module；
Wherein, power management module is direct-connected in bluetooth module, amplifier module, inversed module power supply, amplifier module forward edge
It is connected to bluetooth module, is connected with inversed module backward；
The noise reduction bluetooth headset can provide two-stage noise reduction and 3 kinds of working methods；
The two-stage noise reduction includes：Level-one passive type noise reduction and the active noise reduction of two level；
The active noise reduction of level-one surrounds ear using acoustic damping materials and forms enclosure space, or uses silica gel earplugs sound insulation
Material blocks ambient noise, for eliminating extraneous high frequency noise；
The two level active noise reduction uses the reverse phase sound wave equal with ambient noise, noise is neutralized, for eliminating the external world
Low-frequency noise；
3 kinds of operating modes are respectively：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, lead to
Cross Bluetooth switch, noise reduction waved switch carrys out implementation pattern switching
The active noise reduction operation principle of two level is as follows：
Share 3 kinds of operating modes at present：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, respectively
It is realized by Bluetooth switch, noise reduction toggle switch
1. independent bluetooth mode：Short-press bluetooth voltage switch, bluetooth booting work reach blue by the frequency multiplication of 26M crystal oscillators
The required 2.402G-2.480G working frequencies of tooth；When receiving data, data are connected to chip by antenna, pass through
Loudspeaker are given in output after the demodulation of chip, decoding (ANC chips are in pass-through state at this time, do not cut any ice)；Sending number
According to when, data packet is sent after the coding of Bluetooth chip, modulation by antenna；And support HFP, HSP, AVRCP,
The agreements such as A2DP can be charged by USB line to earphone
2. independent noise reduction mode：By stirring noise reduction power switch, earphone enters noise reduction mode, the earphone using FB (after
Feedback formula) noise reduction, AS3514 noise reductions chip sensed the noise signal of environment at ear by the microphone of left and right cavity, then exported
Opposite in phase, same magnitude same frequency signal to loudspeaker, send out the opposite signal of same environmental noise signal phase by loudspeaker
Environmental noise is offset, achieving the purpose that noise reduction.
3. bluetooth adds noise reduction mode：Bluetooth, noise reduction power switch are opened respectively, and earphone enters bluetooth noise reduction mode, bluetooth
CSR8635 signals by ear put difference turn it is single-ended after, into AS3415 noise reduction chips, noise reduction chip receive bluetooth audio letter
Number and the environmental noise signal that senses of microphone export the audio signal for reducing noise to loudspeaker after Frequency mixing processing, so that it may
To hear perfect noiseless music.
The device provided by the invention for realizing bluetooth headset noise reduction realizes indigo plant by way of software and hardware combining in end side
The decrease of noise functions of tooth earphone, without the additional hardware cost for increasing bluetooth headset noise reduction so that bluetooth headset is at low cost, volume
It is small, easy to carry.
One of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with
Relevant hardware is controlled by program to complete, the program can in being stored in a computer read/write memory medium,
The storage medium, such as ROM/RAM, disk, CD etc..
Above by reference to the preferred embodiment of the present invention has been illustrated, not thereby limit to the interest field of the present invention.This
Field technology personnel do not depart from the scope of the present invention and essence in made by all any modification, equivalent and improvement, should all this
Within the interest field of invention.
Claims (5)
1. a kind of noise reduction bluetooth headset, it is characterised in that：
The noise reduction bluetooth headset comprises the following modules：Bluetooth module, amplifier module, power management module, inversed module, noise
Acquisition module；
Wherein, power management module is direct-connected in bluetooth module, amplifier module, inversed module power supply, and amplifier module forward edge is connected to
Bluetooth module is connected with inversed module backward；
The noise reduction bluetooth headset can provide two-stage noise reduction and 3 kinds of working methods；
The two-stage noise reduction includes：Level-one passive type noise reduction and the active noise reduction of two level；
The active noise reduction of level-one surrounds ear using acoustic damping materials and forms enclosure space, or uses silica gel earplugs acoustic material
Stop ambient noise, for eliminating extraneous high frequency noise；
The two level active noise reduction uses the reverse phase sound wave equal with ambient noise, and noise is neutralized, for eliminating the low of the external world
Frequency noise；
3 kinds of operating modes are respectively：Bluetooth operating mode, noise reduction operating mode, bluetooth add noise reduction operating mode, pass through indigo plant
Tooth switch, noise reduction waved switch carry out implementation pattern switching.
2. a kind of noise reduction bluetooth headset according to claim 1, the bluetooth mode is realized by the following method, short
By bluetooth voltage switch, bluetooth booting work reaches 2.402G-2.480G working frequencies by the frequency multiplication of 26M crystal oscillators；It is connecing
When receiving data, data are connected to chip by antenna, are exported after the demodulation of chip, decoding to loudspeaker, at this time ANC chips
It is in pass-through state, is not cut any ice；When transmission data, data packet is after the coding of Bluetooth chip, modulation
It is sent by antenna；And supporting HFP, HSP, AVRCP, A2DP agreements can be charged by USB line to earphone.
3. a kind of noise reduction bluetooth headset according to claim 1, the noise reduction mode are realized by the following method, lead to
It crosses and stirs noise reduction power switch, earphone enters noise reduction mode, which is made an uproar using FB feedback types FB, and noise reduction chip passes through left and right chamber
The microphone of body senses the noise signal of environment at ear, and then output phase is opposite, same frequency signal of same magnitude to loudspeaker
, the opposite signal of same environmental noise signal phase is sent out by loudspeaker to offset environmental noise, to achieve the purpose that noise reduction.
4. a kind of noise reduction bluetooth headset according to claim 1, the bluetooth adds noise reduction mode to come by the following method
It realizes:Bluetooth, noise reduction power switch are opened respectively, and earphone enters bluetooth noise reduction mode, and bluetooth CSR8635 signals put difference by ear
Divide after turning single-ended, into noise reduction chip, the environmental noise that noise reduction chip receives the audio signal of bluetooth and microphone senses is believed
Number, after Frequency mixing processing, the audio signal for reducing noise is exported to loudspeaker, so that it may to hear perfect noiseless music.
5. a kind of noise reduction bluetooth headset according to claim 3 or 4, the noise reduction chip is AS3514.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810441153.8A CN108600888A (en) | 2018-05-10 | 2018-05-10 | A kind of noise reduction bluetooth headset |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810441153.8A CN108600888A (en) | 2018-05-10 | 2018-05-10 | A kind of noise reduction bluetooth headset |
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| CN108600888A true CN108600888A (en) | 2018-09-28 |
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| CN201810441153.8A Pending CN108600888A (en) | 2018-05-10 | 2018-05-10 | A kind of noise reduction bluetooth headset |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267139A (en) * | 2019-06-12 | 2019-09-20 | 郭军伟 | A kind of intelligence voice identification noise filtering earphone |
| CN110650412A (en) * | 2019-10-17 | 2020-01-03 | 陕西金蝌蚪智能科技有限公司 | Drying processing method and device, terminal and storage medium |
| CN110689901A (en) * | 2019-09-09 | 2020-01-14 | 苏州臻迪智能科技有限公司 | Voice noise reduction method and device, electronic equipment and readable storage medium |
| CN112839278A (en) * | 2020-12-28 | 2021-05-25 | 广州番禺巨大汽车音响设备有限公司 | Bluetooth headset noise reduction method and device based on ANC noise reduction and Bluetooth headset |
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| CN103686501A (en) * | 2012-09-05 | 2014-03-26 | 深圳市凯聚源科技有限公司 | Noise cancelling bluetooth headset |
| CN206422884U (en) * | 2016-12-08 | 2017-08-18 | 峰范（北京）科技有限公司 | Wireless headset |
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2018
- 2018-05-10 CN CN201810441153.8A patent/CN108600888A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090041260A1 (en) * | 2007-08-10 | 2009-02-12 | Oticon A/S | Active noise cancellation in hearing devices |
| CN103686501A (en) * | 2012-09-05 | 2014-03-26 | 深圳市凯聚源科技有限公司 | Noise cancelling bluetooth headset |
| CN206422884U (en) * | 2016-12-08 | 2017-08-18 | 峰范（北京）科技有限公司 | Wireless headset |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110689901A (en) * | 2019-09-09 | 2020-01-14 | 苏州臻迪智能科技有限公司 | Voice noise reduction method and device, electronic equipment and readable storage medium |
| CN110650412A (en) * | 2019-10-17 | 2020-01-03 | 陕西金蝌蚪智能科技有限公司 | Drying processing method and device, terminal and storage medium |
| CN112839278A (en) * | 2020-12-28 | 2021-05-25 | 广州番禺巨大汽车音响设备有限公司 | Bluetooth headset noise reduction method and device based on ANC noise reduction and Bluetooth headset |
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Effective date of registration: 20210207 Address after: No.5, Shuiling Road, Dongcheng Street, Dongguan, Guangdong 523000 Applicant after: Dongguan Senmai Acoustics Technology Co.,Ltd. Address before: 523000 Building 8, Wangxin Road, Shuiling Industrial Park, Zhouwu Industrial Zone, Dongcheng District, Dongguan City, Guangdong Province Applicant before: GUANGDONG SENMAI ELECTRONIC Co.,Ltd. |
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Application publication date: 20180928 |
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