CN208908482U - The earphone of adjustable noise reduction - Google Patents
The earphone of adjustable noise reduction Download PDFInfo
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- CN208908482U CN208908482U CN201820944607.9U CN201820944607U CN208908482U CN 208908482 U CN208908482 U CN 208908482U CN 201820944607 U CN201820944607 U CN 201820944607U CN 208908482 U CN208908482 U CN 208908482U
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Abstract
The utility model is suitable for audio frequency apparatus technical field, provide a kind of earphone of adjustable noise reduction, including earphone case, the loudspeaker and voice control system that are arranged in inside the earphone case, the audio control system includes: audio collection module again, the noise signal under the earphone case external environment is acquired, and the noise signal is sent；Main control module receives the noise signal that the audio collection module is sent, judges whether the noise loudness of the external environment reaches preset noise threshold；Noise reduction command signal is opened if then sending；Noise reduction module executes the noise reduction operation that audio is played to the loudspeaker when receiving the unlatching noise reduction command signal.Whereby, the earphone of adjustable noise reduction provided by the utility model, according to the noise parameters under earphone local environment, controls the operation of the audio defeat in the audio defeat played to its loudspeaker, promotes the auditory perception that user listens to the audio that loudspeaker plays.
Description
Technical field
The utility model relates to audio frequency apparatus technical field more particularly to a kind of earphones of adjustable noise reduction.
Background technique
For present people, music has become essential a kind of life flavoring agent in people's life.For
Better enjoyment music, earphone also become one of standing article with young man.Earphone is taken, people can enter
Inside the fine scene that earphone is presented for us, and do not have to worry that others can be bothered.But with the development of industrial technology, respectively
Kind noise source can issue noisy sound, for example the automobile on road thunders, noise in subway etc..In order to better
Catch the content of music, Many times we can select to increase volume.However, being received under relatively high volume for a long time
Concert damages our hearing, and this hearing impairment is substantially irreversible.Medical research shows that audience is listening to
Volume should be limited in 100 decibels hereinafter, and continuously listening period should be limited in one hour when music.Otherwise, will
It may cause permanent hearing impairment.
In the prior art, audience can be set audio playing apparatus max volume and continuous listening period, when the company
The max volume of the audio playing apparatus and continuous listening period when continuous listening period reaches, will be automatically stopped play music or
Person's automatic shutdown, this method are more inflexible and not humanized enough.If number of patent application is CN201320237049.X, invention name
The referred to as Chinese utility model patent of " earphone of overtime automatic control " is the earpiece portion in earphone, and sound is arranged and volume passes
Sensor, control device, when earphone begins to use, sound and volume sensor automatically record output volume and the time of earphone, comprehensive
Total voice indices calculated to the influence degree of ear, when user's use for a long time or louder volume use earphone, control device
It voluntarily controls, cuts off volume, user is prompted to pay attention to easy ear health care, switch is set on earphone cable, controls control device
Use state, control device have a function of automatic tuning volume, the earphone of above-mentioned time-out automatic control, prevent from user it is long when
Between, louder volume use earphone, protect ears.It can be seen that the patent is the maximum of the simply earphone when listening period reaches
It cuts off and plays when volume and continuous listening period, protected mode is inflexible, and user's impression is bad.
Another way be it is simple reduce volume, do not account for extraneous environmental noise sense of hearing can be brought it is very big
It influences.If number of patent application is 201420808798.8, the China of entitled " clip-on type earphone of adjustable noise reduction gain "
Utility model patent, structure is mainly by loudspeaker unit, 3.5mm earphone male connector, earphone cable, shell, sponges cover, audio defeat electricity
Road composition；Wherein audio defeat circuit includes processor MCU (Microcontroller Unit, micro-control unit), pickup
Device, signal amplification circuit, sense of touch key, electric power management circuit, lithium battery, channel switch, audio signal input end, loudspeaker list
Member, LED light；Can be by the setting of sense of touch key, selection to the active decrease of noise functions of earphone, the increasing of adjustable noise reduction
Benefit can also automatically adjust gain, carry out the elimination to noise.The influence of extraneous environmental noise is not accounted in the patent,
Simple noise reduction process only is done to output audio, the auditory perception of user is bad.
In summary, the prior art is in actual use, it is clear that there is inconvenient and defect, so it is necessary to be improved.
Utility model content
For above-mentioned defect, the purpose of this utility model is to provide a kind of earphones of adjustable noise reduction, so as to earphone
Loudspeaker play audio defeat when, according to the noise parameters under earphone local environment, control the operation of the audio defeat,
Promote the auditory perception that user listens to the audio that loudspeaker plays.
To achieve the goals above, the utility model provides a kind of earphone of adjustable noise reduction, including earphone case, setting exist
Loudspeaker and audio control system inside the earphone case, the audio control system include: again
Audio collection module acquires the noise signal under the earphone case external environment, and the noise signal is sent out
It send；
Main control module receives the noise signal that the audio collection module is sent, judges making an uproar for the external environment
Whether sound loudness reaches preset noise threshold；Noise reduction command signal is opened if then sending；
Noise reduction module executes the drop that audio is played to the loudspeaker when receiving the unlatching noise reduction command signal
It makes an uproar operation.
According to the earphone, the sound acquisition module includes:
Wireline audio acquisition unit acquires the noise signal under the external environment, and sends the noise signal to
The main control module；And/or
Wireless audio acquisition unit acquires the noise signal under the external environment, and sends the noise signal to
The main control module.
According to the earphone, the main control module includes:
Main control unit when judging that the noise loudness reaches preset noise threshold according to the noise signal, opens institute
Noise reduction module is stated, the noise signal is exported after digital-to-analogue conversion, and the audio signal that presently described loudspeaker is played
It is sent to the noise reduction module, and controls the noise reduction module adjustment noise reduction parameters；
Signal processing unit is connect with the active cell and the noise reduction module respectively, will receive respectively described in
Noise signal and the audio signal are sent to the noise reduction module after handling by signal transformation and amplifying circuit.
According to the earphone, the audio control system further include:
The manually opened module of noise reduction, is connected to the main control module, and receives and transmits starting to the main control module or close
Close decrease of noise functions operational order；After the main control module receives the starting or closing decrease of noise functions operational order, Xiang Suoshu
Noise reduction module sends the open signal or shutdown signal.
According to the earphone, the noise reduction module includes:
Noise reduction unit adjusts the noise reduction parameters according to the control of the main control unit, the signal processing unit is sent out
The noise signal sent carries out noise reduction operation；
Audio mixing unit, by after the noise reduction unit noise reduction operation the noise signal and the audio signal
Noise reduction audio is exported after being mixed.
According to the earphone, the noise reduction parameters include the volume and regulating time of noise reduction depth, noise reduction audio
Interval；The main control unit controls the noise reduction module according to the size of the noise loudness and adjusts the noise reduction depth to correspondence
Preset range；And
The main control unit is when the play time for monitoring the loudspeaker reaches the preset time threshold, according to institute
Stating noise loudness and the noise reduction depth successively reduces the volume of the noise reduction audio according to the regulating time interval.
According to the earphone, the audio control system further include:
The noise threshold adjustment module being connect with the main control unit, for the noise threshold to be arranged；
The noise reduction parameters adjustment module being connect with the main control unit, for the noise reduction parameters to be arranged.
According to the earphone, noise threshold adjustment module and noise reduction parameters adjustment module setting with the earphone
Wirelessly communicate the communication terminal of connection.
According to the earphone, the audio collection module is acquired by wire microphone or wireless microphone
's.
According to the earphone, the noise reduction module of the noise reduction unit and Audio mixing unit is integrated, and is dropped including active
It makes an uproar unit and the active noise reduction unit control circuit that is connect with the active noise reduction unit.
According to the earphone, the active noise reduction unit is provided with CSCL interface, CSDA interface, LINR interface, LINL
Interface, BPR interface, BPL interface and audio output left and right acoustic channels；The active noise reduction unit control circuit includes one group bipolar
Double open switch circuit includes two double-pole switches in parallel, the input of a double-pole switch in the bipolar double open switch circuit
One pole at end is converted with the signal and the right-channel signals output end of amplifying circuit is connect, the input terminal of another double-pole switch
Homopolarity converted with the signal and the left channel signals output end of amplifying circuit is connect, the output end difference of two double-pole switches
It is connect with the LINR interface and LINL interface.
According to the earphone, the main control unit includes micro-control unit, and the micro-control unit is provided with digital-to-analogue and turns
Parallel operation, bus extender, wireline audio interface, wireless audio receiver, analog switch, left channel pin interface, right channel draw
Foot interface, control line pin interface data line pin interface；Wherein, the wireline audio interface connects wire microphone, described
Wireless audio receiver connects the wireless microphone；The left channel pin interface, right channel pin interface respectively with it is described
Signal transformation and the left and right sound channels signal input part connection of amplifying circuit；The control line pin interface and data wire pin connect
Mouth is separately connected the CSCL interface and CSDA interface of the noise reduction module.
According to the earphone, the active noise reduction unit control circuit further includes an earphone male connector, the earphone male connector
Left and right acoustic channels output end connect respectively with another pole of one group of bipolar double open switch and the BPL interface and BPR interface
It connects.
According to the earphone, the manually opened module of noise reduction is set on the shell or is set to and the ear
On the communication terminal of machine communication connection, and it is connect with the bus extender.
According to the earphone, the main control module monitors the volume and/or play time of the loudspeaker, in the sound
Amount reaches preset volume threshold and/or when the time reaches preset time threshold, sends open signal to noise reduction module.
The utility model is by setting the audio control system of the earphone of adjustable noise reduction to and including: audio collection mould
Block, main control module and noise reduction module, when main control module acquires under the earphone case external environment according to audio collection module
Noise signal, when judging that the noise loudness of the external environment reaches preset noise threshold, send open noise reduction instruction letter
Number；When noise reduction module receives the unlatching noise reduction command signal, the noise reduction operation that audio is played to the loudspeaker is executed.By
This, the parameter of noise under the environment according to locating for earphone executes noise reduction operation to the audio that earphone speaker plays, improves use
Listen to the hearing impression that earphone plays audio in family.In addition, the earphone of adjustable noise reduction provided by the utility model can also be according to pendant
The length for wearing the time carrys out adjust automatically volume, and record user plays the time of music, and coupling collar over time, become
The parameters such as border noise loudness, noise reduction depth, the loudness for reducing earphone and playing music slowly, are realized in the case where user is noninductive
Protect the purpose of hearing.Also, the parameters such as noise threshold, noise reduction depth can also be connected by being set to wirelessly communicate with earphone
Mobile communication terminal on corresponding module manually adjusted, to adapt to the listening demand of different user.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the earphone of adjustable noise reduction provided by the embodiment of the utility model；
Fig. 2 is one of the composition schematic diagram of audio control system of earphone provided by the embodiment of the utility model；
Fig. 3 is the two of the composition schematic diagram of the audio control system of earphone provided by the embodiment of the utility model；
Fig. 4 is the three of the composition schematic diagram of the audio control system of earphone provided by the embodiment of the utility model；
Fig. 5 is the circuit diagram of the audio control system of earphone provided by the embodiment of the utility model.
Wherein, appended drawing reference:
10- earphone case 312- wireless audio acquisition unit
20- loudspeaker 321- main control unit
30- audio control system 322- signal processing unit
31- audio collection module 331- noise reduction unit
32- main control module 332- Audio mixing unit
33- noise reduction module 333- active noise reduction unit
The manually opened module 334- active noise reduction unit control circuit of 34- noise reduction
35- noise threshold adjusts mono- group of module 3341- bipolar double open switch circuit
36- noise reduction parameters adjust module 3211- micro-control unit
3221 signal of the earphone transformation of 100- is adjustable noise reduction and amplifying circuit
311- wireline audio acquisition unit 33411- double-pole switch
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specification in for " one embodiment ", " embodiment ",
The reference of " example embodiment " etc. refers to that the embodiment of description may include specific feature, structure or characteristic, but not necessarily
Each embodiment must include these a particular feature, structure, or characteristics.In addition, this statement not refers to the same implementation
Example.Further, it when describing specific feature, structure or characteristic in conjunction with the embodiments, is described with or without specific, table
Bright such feature, structure or characteristic are integrated in other embodiments is in the knowledge of those skilled in the range.
Some vocabulary is used in specification and following claims to censure specific components or component, this field
The member of ordinary skill, it is to be appreciated that technology user or manufacturer can be different noun or term come call the same component or
Component.This specification and following claims not in such a way that the difference of title is as component or component is distinguished, and
It is the criterion with component or component difference functionally as differentiation.In specification in the whole text and subsequent claim
Mentioned " comprising " and "comprising" is an open term, therefore should be construed to " including but not limited to ".In addition, " connection "
One word includes any direct and indirect means of electrical connection herein.Indirect means of electrical connection include by other devices into
Row connection.
It should be noted that in the description of the present invention, term " transverse direction ", " longitudinal direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and is not the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
Referring to Fig. 1 and Fig. 2, in one embodiment of the utility model, a kind of earphone 100 of adjustable noise reduction is provided,
Including earphone case 10, the loudspeaker being arranged in inside earphone case 10 20 and audio control system 30, audio control system
30 include: again
Audio collection module 31 acquires the noise signal under 10 external environment of earphone case, and the noise signal is sent out
It send；
Main control module 32 receives the noise signal that audio collection module 31 is sent, judges making an uproar for the external environment
Whether sound loudness reaches preset noise threshold；Noise reduction command signal is opened if then sending；
Noise reduction module 33 executes the drop that audio is played to loudspeaker 20 when receiving the unlatching noise reduction command signal
It makes an uproar operation.
In this embodiment, it is contemplated that play audio since the noise outside earphone 100 may also will affect earphone 100
Quality, the sense of hearing for making user play audio using earphone 100 is bad, therefore increases in the noise reduction operation of audio control system 30
The parameter index of 100 ambient external noise of earphone.10 external environment of earphone case is acquired by audio collection module 31 first
Under noise signal, main control module 32 judges whether needs according to the noise signal and pre-set noise threshold that receive
It issues and opens noise reduction command signal unlatching noise reduction module 33, when noise reduction module 33 receives the unlatching noise reduction command signal,
Audio then is played to loudspeaker 20 and executes noise reduction operation, the noise reduction audio that thus loudspeaker 20 plays is according to outside earphone case 10
The parameter of portion's environmental noise executes corresponding noise reduction operation, due to considering the influence of environmental noise, improves user and uses ear
Sense of hearing comfort level when machine 100.
Referring to Fig. 3, in one embodiment of the utility model, audio collection module 31 includes:
Wireline audio acquisition unit 311 acquires the noise signal under the external environment, and the noise signal is sent
To main control module 32；And/or
Wireless audio acquisition unit 312 acquires the noise signal under the external environment, and the noise signal is sent
To main control module 32；Wireline audio acquisition unit can be passed through respectively for the acquisition of the noise signal under the external environment
311 and wireless audio acquisition unit 312 carry out, or be acquired simultaneously using two kinds of audio collection units.Preferably, audio
Acquisition module 31 is acquired by wire microphone or wireless microphone.
Referring to Fig. 3, in one embodiment of the utility model, main control module 32 includes:
Main control unit 321 when judging that the noise loudness reaches preset noise threshold according to the noise signal, is opened
Noise reduction module 33 exports the noise signal after digital-to-analogue conversion, and the audio signal that current speaker 20 is played is sent out
It is sent to noise reduction module 33, and controls noise reduction module 33 and adjusts noise reduction parameters；
Signal processing unit 322 is connect with main control unit 321 and noise reduction module 33 respectively, will receive respectively described in
Noise signal and the audio signal are sent to noise reduction module 33 after handling by signal transformation and amplifying circuit 3221.
In this embodiment, earphone 100 can play audio by wireless mode or wireline mode, such as use bluetooth ear
The mode playback music of machine or wired earphone.When playing Bluetooth music, main control unit 321 receives Bluetooth music signal
Mould is converted by 321 inside DAC of main control unit (Digital to analog converter, digital analog converter) afterwards
Quasi- signal is output to signal processing unit 322, and signal processing unit 322 is sent into after audio analog signals are carried out preliminary treatment
Noise reduction module 33.Signal processing unit 322 realizes to include a signal transformation and amplifying circuit 3221.Booting plays wired sound
When frequency, then wireline audio is sent directly by noise reduction module 33 by the analog switch of main control unit 321.It is achieved in wired
Noise reduction music can also be listened under mode.
Unlike the automatic decrease of noise functions of the earphone 100 of above-described embodiment description: earphone 100 also has manually actively
Decrease of noise functions.Specifically, audio control system 30 further include:
The manually opened module 34 of noise reduction, connect with main control module 32, receives and transmits starting to main control module 32 or close
Decrease of noise functions operational order；After main control module 32 receives the starting or closing decrease of noise functions operational order, to noise reduction module
33 send the open signal or shutdown signal.The manually opened module 34 of the noise reduction is set on the shell 10 or sets
It is placed in on the mobile communication terminal of the earphone 100 communication connection, thus user, which can be manually pressed by, changes functional module, starting
The decrease of noise functions of earphone 100.Therefore, main control unit 321 can also according to the needs of users, under wireline audio play mode,
The decrease of noise functions of earphone 100 is switched according to their needs, and noise reduction audio can be also played under wired play mode to realize.
In one embodiment of the utility model, noise reduction module 33 includes:
Noise reduction unit 331 adjusts the noise reduction parameters according to the control of main control unit 321, by the signal processing unit
322 noise signals sent carry out noise reduction operation；
Audio mixing unit 332, by the noise signal and audio letter after 331 noise reduction operation of noise reduction unit
Noise reduction audio is exported after number being mixed.
In this embodiment, the noise reduction parameters that noise reduction unit 331 is configured according to main control unit 321, by the noise
Signal carries out noise reduction operation；Audio mixing unit 332 respectively carries out the noise signal after noise reduction with audio signal respectively later
Noise reduction audio is exported after mixing, realizes the noise reduction that earphone 100 exports audio.Specifically, the noise reduction parameters include noise reduction depth
Degree, the volume of noise reduction audio and regulating time interval；Main control unit 321 controls noise reduction according to the size of the noise loudness
Module 33 adjusts the noise reduction depth to corresponding preset range；And
Main control unit 321 is when the play time for monitoring loudspeaker 20 reaches the preset time threshold, according to described
Noise loudness and the noise reduction depth successively reduce the volume of the noise reduction audio according to the regulating time interval.Such as it is current
The noise loudness of environmental noise reached 80 decibels it is serious influenced user and listen to the music that plays in earphone,
It needs to carry out noise reduction, and influences the listening music of user to make the noise not, the noise loudness needs to be reduced to 50 decibels
Hereinafter, so noise reduction depth -30 decibel, can be configured, Huo Zhejie according to the needs of users as specifically how many decibel
It closes other specific noise reduction parameters to be configured, is the preset range met the requirements at 50~0 decibels.And according to different user
The volume that different noise reduction audios also not can be set of the habit listened to music, if habit listens and loud can be set to 60
Decibel, if habit listen small sound can be set to 45 decibels etc..And in order to allow user once not feel the obvious row of noise reduction,
Can be to setting regulating time interval, such as 10 decibels of the noise loudness was reduced every 3 minutes, and adjusted every 5 minutes
The volume of noise reduction audio differs 5 decibels of difference with the volume ratio of last time noise reduction audio, feels user acoustically
Comfortably, rather than suddenly biggish change acoustically is made.In addition the time threshold is such as configured according to conventional, is such as dropped
For noise frequency broadcast sound volume at 100 decibels, time threshold is 1 hour.Or noise reduction audio broadcast sound volume is at 70 decibels, when
Between threshold value be 2 hours.Or the noise reduction audio no matter exported is respectively how many, it is unified to set time threshold to 1 hour.
Referring to fig. 4, in one embodiment of the utility model, audio control system 30 further include:
The noise threshold adjustment module 35 being connect with main control unit 321, for the noise threshold to be arranged；
The noise reduction parameters adjustment module 36 being connect with main control unit 321, for the noise reduction parameters to be arranged；Pass through above-mentioned two
A adjustment module can need to carry out respectively according to individual subscriber the adjustment of the noise threshold and noise reduction parameters.For example, if with
Family is more sensitive to environmental noise, can reduce the noise threshold, as the threshold value is set as 50 decibels.Or user is to dropping
The time interval that audio volume lowers during making an uproar has different needs, and can voluntarily be configured.Preferably, noise threshold tune
The communication terminal with the wireless communication connection of earphone 100 is arranged in mould preparation block 35 and noise reduction parameters adjustment module 36.Such as in hand
Relevant APP (Armor Piercing Proof, computer applied algorithm) can be installed on machine；Related ginseng is carried out convenient for user
Several adjustment meets the needs of it plays audio to earphone 100.
In one embodiment of the utility model, main control module 32 monitors the volume and/or play time of loudspeaker 20,
When the volume reaches preset volume threshold and/or the time reaches preset time threshold, send open signal to
Noise reduction module 33.The play time of the monitoring loudspeaker 20 of main control module 32, it may also be said to be that earphone 100 is worn according to monitoring user
The length of time carrys out adjust automatically volume, to achieve the purpose that protect hearing user.Main control module 32 automatically records user's broadcasting
The time of music, if what is set before is active noise reduction, the music of this time is the music after active noise reduction；
If the manual noise reduction switch set before, carried out according to actual switch noise reduction operation；And combining environmental over time, become
The parameters such as noise loudness, noise reduction depth play the volume of music by the reduction earphone 100 of main control module 32 controlled slowly,
The purpose of protection hearing is realized in the case where user is noninductive.Earphone 100 can be opened automatically according to the noise loudness of external environment
Close ANC (Active Noise Cancellation, active noise reduction) function, and adaptive adjustment noise reduction depth.
Referring to fig. 4, in one embodiment of the utility model, noise reduction unit 331 and Audio mixing unit 332 are integrated
Noise reduction module 33, and including active noise reduction unit 333 and the active noise reduction unit being connect with active noise reduction unit 333 control electricity
Road 334.Referring to Fig. 5, audio control system 30 is specifically included:
Active noise reduction unit 333 is provided with CSCL interface, CSDA interface, LINR interface, LINL interface, BPR interface, BPL
Interface and audio output left and right acoustic channels (FB_MICR, FB-MICL；LSPK, HPR)；Active noise reduction unit control circuit 334 wraps
One group of bipolar double open switch circuit 3341 is included, 3341 include two double-pole switches 33411 in parallel in bipolar double open switch circuit,
One pole of the input terminal of one double-pole switch 33411 and signal convert and the right-channel signals output end of amplifying circuit 3221
(OUT-R) it connects, the homopolarity and signal of the input terminal of another double-pole switch 33411 convert and the L channel of amplifying circuit 3221
Signal output end (OUT-L) connection, the output end of two double-pole switches 33411 connect with the LINR interface and LINL interface respectively
It connects.
In addition, main control unit 321 includes micro-control unit (MCU) 3211, micro-control unit 3211 is provided with digital-to-analogue conversion
Device, bus extender (GPIO), wireline audio interface (MIC_L, MIC_R), wireless audio receiver (RF), analog switch, a left side
Sound channel pin interface (SPKL), right channel pin interface (SPKR), control line pin interface (SCL), data line pin interface
(SDA)；Wherein, wireline audio interface connects (MIC_L, MIC_R) wire microphone, and wireless audio receiver (RF) connects institute
State wireless microphone；Left channel pin interface (SPKL), right channel pin interface (SPKR) are converted and are put with the signal respectively
The left and right sound channels signal input part connection of big circuit 3221；Control line pin interface (SCL) and data wire pin interface (SDA)
It is separately connected the CSCL interface and CSDA interface of active noise reduction unit 333.
Active noise reduction unit control circuit 334 further includes an earphone male connector (JACK), and not limiting to herein is male connector, can be with
It is female, and can be headset body base and then match a tone frequency channel wire again, it can also be with earphone itself even a band male connector
Tone frequency channel wire.The left and right acoustic channels output end (L, R) of earphone male connector, respectively with another pole of one group of bipolar double open switch 33411 with
And BPL interface is connected with BPR interface.In addition, the manually opened module 34 of noise reduction is connect with bus extender (GPIO).Specific implementation
On, the manually opened module 34 of noise reduction is set as the ANC key in Fig. 5.
In the present embodiment, active noise reduction unit 333 acquires earphone outer covering 10 by MIC (Microphone, microphone)
The ambient noise signal on periphery, after being sent to micro-control unit (MCU) 3211, digital analog converter carries out digital-to-analogue change to noise signal
After changing by left channel pin interface (SPKL), right channel pin interface (SPKR) be transmitted to signal convert amplifying circuit 3221 into
The transformation and enhanced processing of row signal.If similarly currently playing is wireless audio signal, also by the wireless audio signal
It is transmitted to transformation and enhanced processing that signal transformation amplifying circuit 3221 carries out signal.Later, signal converts amplifying circuit 3221
Treated noise signal and wireless audio signal via CSCL interface and CSDA interface are transmitted to active noise reduction unit 333,
And do inside it mixed with audio signal after corresponding signal processing after by audio output left and right acoustic channels (FB_MICR, FB-
MICL；LSPK, HPR) output, to realize active noise reduction function.For currently playing wireline audio signal, with wireless sound
The difference of audio signalprocessing mode is, is delivered directly to active noise reduction unit 333 by analog switch.Main control unit 321 can
To be communicated by communication bus with active noise reduction unit 333, control active noise reduction unit 333 configures noise reduction parameters, controls noise reduction
The switch of function adjusts noise reduction depth etc..The mode of decrease of noise functions switch, can be by manual mode, can also be by automatic
Open function realizes automatic switch decrease of noise functions.When using decrease of noise functions is automatically switched, it is connected to the MIC meeting of main control unit 321
External sound is acquired to main control unit 321, main control unit 321 judges whether to reach preset according to the loudness size of outside noise
Noise threshold, these parameters of noise threshold can be set by cell phone application.When reaching given threshold, main control MCU is automatic
Decrease of noise functions is opened, and adjusts the depth of noise reduction according to the volume of outside noise, to adapt to different noise circumstances.For
There is the people of specific demand, active noise reduction function can also be turned on or off by ANC noise reduction switch manually.
In conclusion the utility model is by setting the audio control system of the earphone of adjustable noise reduction to and including: sound
Frequency acquisition module, main control module and noise reduction module, when main control module acquires outside the earphone case according to audio collection module
Noise signal under portion's environment when judging that the noise loudness of the external environment reaches preset noise threshold, sends and opens drop
It makes an uproar command signal；When noise reduction module receives the unlatching noise reduction command signal, the noise reduction that audio is played to the loudspeaker is executed
Operation.As a result, under the environment according to locating for earphone noise parameter, to earphone speaker play audio execute noise reduction operation,
It improves user and listens to the hearing impression that earphone plays audio.In addition, the earphone of adjustable noise reduction provided by the utility model may be used also
The time of music is played come adjust automatically volume, and record user with the length according to wear time, and in a period of time
The parameters such as combining environmental noise loudness, noise reduction depth afterwards, the loudness for reducing earphone and playing music slowly, in the feelings that user is noninductive
The purpose of protection hearing is realized under condition.Also, the parameters such as noise threshold, noise reduction depth can also be wireless with earphone by being set to
Corresponding module on the mobile communication terminal of communication connection is manually adjusted, to adapt to the listening demand of different user.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art work as can make various corresponding changes and modifications, but these according to the utility model
Corresponding changes and modifications all should belong to the protection scope of the utility model the attached claims.
Claims (15)
1. a kind of earphone of adjustable noise reduction, including earphone case, the loudspeaker being arranged in inside the earphone case and audio
Control system, which is characterized in that the audio control system includes: again
Audio collection module acquires the noise signal under the earphone case external environment, and the noise signal is sent；
Main control module receives the noise signal that the audio collection module is sent, and judges that the noise of the external environment is rung
Whether degree reaches preset noise threshold；Noise reduction command signal is opened if then sending；
Noise reduction module executes the noise reduction for playing audio to the loudspeaker and grasps when receiving the unlatching noise reduction command signal
Make.
2. earphone according to claim 1, which is characterized in that the audio collection module includes:
Wireline audio acquisition unit, acquires the noise signal under the external environment, and sends the noise signal to described
Main control module；And/or
Wireless audio acquisition unit, acquires the noise signal under the external environment, and sends the noise signal to described
Main control module.
3. earphone according to claim 2, which is characterized in that the main control module includes:
Main control unit when judging that the noise loudness reaches preset noise threshold according to the noise signal, opens the drop
It makes an uproar module, the noise signal is exported after digital-to-analogue conversion, and the audio signal that presently described loudspeaker is played is sent
To the noise reduction module, and control the noise reduction module adjustment noise reduction parameters；
Signal processing unit is connect with the main control unit and the noise reduction module respectively, the noise that will be received respectively
Signal and the audio signal are sent to the noise reduction module after handling by signal transformation and amplifying circuit.
4. earphone according to claim 2, which is characterized in that the audio control system further include:
The manually opened module of noise reduction, is connected to the main control module, and receives and transmits starting to the main control module or close drop
It makes an uproar functional command；After the main control module receives the starting or closing decrease of noise functions operational order, Xiang Suoshu noise reduction
Module sends open signal or shutdown signal.
5. earphone according to claim 3, which is characterized in that the noise reduction module includes:
Noise reduction unit adjusts the noise reduction parameters according to the control of the main control unit, the signal processing unit is sent
The noise signal carries out noise reduction operation；
Audio mixing unit, by after the noise reduction unit noise reduction operation the noise signal and the audio signal carry out
Noise reduction audio is exported after mixing.
6. earphone according to claim 5, which is characterized in that the noise reduction parameters include noise reduction depth, noise reduction audio
Volume and regulating time interval；The main control unit controls the noise reduction module according to the size of the noise loudness and adjusts
The noise reduction depth is to corresponding preset range；And
The main control unit is rung when the play time for monitoring the loudspeaker reaches preset time threshold according to the noise
Degree and the noise reduction depth successively reduce the volume of the noise reduction audio according to the regulating time interval.
7. earphone according to claim 5, which is characterized in that the audio control system further include:
The noise threshold adjustment module being connect with the main control unit, for the noise threshold to be arranged；
The noise reduction parameters adjustment module being connect with the main control unit, for the noise reduction parameters to be arranged.
8. earphone according to claim 7, which is characterized in that the noise threshold adjustment module and noise reduction parameters adjust mould
The communication terminal with earphone wireless communication connection is arranged in block.
9. earphone according to claim 1, which is characterized in that the audio collection module is by wire microphone or nothing
Line microphone is acquired.
10. earphone according to claim 5, which is characterized in that integrate the drop of the noise reduction unit and Audio mixing unit
It makes an uproar module, and including active noise reduction unit and the active noise reduction unit control circuit being connect with the active noise reduction unit.
11. earphone according to claim 10, which is characterized in that the active noise reduction unit be provided with CSCL interface,
CSDA interface, LINR interface, LINL interface, BPR interface, BPL interface and audio output left and right acoustic channels；The active noise reduction list
First control circuit includes one group of bipolar double open switch circuit, in the bipolar double open switch circuit includes two and in parallel bipolar opens
It closes, a pole of the input terminal of a double-pole switch is converted with the signal and the right-channel signals output end of amplifying circuit is connect,
The homopolarity of the input terminal of another double-pole switch is converted with the signal and the left channel signals output end of amplifying circuit is connect, and two
The output end of a double-pole switch is connect with the LINR interface and LINL interface respectively.
12. earphone according to claim 11, which is characterized in that the main control unit includes micro-control unit, described micro-
Control unit is provided with digital analog converter, bus extender, wireline audio interface, wireless audio receiver, analog switch, Zuo Sheng
Road pin interface, right channel pin interface, control line pin interface data line pin interface；Wherein, the wireline audio interface
Wire microphone is connected, the wireless audio receiver connects wireless microphone；The left channel pin interface, right channel pin
Interface is connect with the left and right sound channels signal input part of signal transformation and amplifying circuit respectively；The control line pin interface sum number
The CSCL interface and CSDA interface of the noise reduction module are separately connected according to wire pin interface.
13. earphone according to claim 12, which is characterized in that the active noise reduction unit control circuit further includes an ear
Machine male connector, the left and right acoustic channels output end of the earphone male connector respectively with another pole of one group of bipolar double open switch and described
BPL interface is connected with BPR interface.
14. earphone according to claim 12, which is characterized in that the manually opened module of noise reduction be set on the shell or
Person is set on the communication terminal communicated to connect with the earphone, and connect with the bus extender.
15. according to claim 1, earphone described in 2,6,7,8,9,11 or 14, which is characterized in that the main control module monitors institute
The volume and/or play time for stating loudspeaker reach preset volume threshold in the volume and/or the time reach default
Time threshold when, send open signal to noise reduction module.
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| CN201820944607.9U CN208908482U (en) | 2018-06-19 | 2018-06-19 | The earphone of adjustable noise reduction |
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| CN201820944607.9U CN208908482U (en) | 2018-06-19 | 2018-06-19 | The earphone of adjustable noise reduction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110418238A (en) * | 2019-08-21 | 2019-11-05 | 深圳市昂思科技有限公司 | A kind of noise reduction bluetooth headset |
| CN111083591A (en) * | 2019-12-13 | 2020-04-28 | 恒玄科技(北京)有限公司 | Configuration method and device of noise reduction earphone and noise reduction earphone |
| CN112055279A (en) * | 2020-09-10 | 2020-12-08 | 江苏紫米电子技术有限公司 | Earphone noise reduction method and device, earphone and medium |
| CN112312255A (en) * | 2020-06-02 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent voice-reducing earphone and noise reduction algorithm based on audio decoder |
| CN112312256A (en) * | 2020-07-30 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent active noise reduction earphone based on digital communication |
| CN112312258A (en) * | 2020-09-08 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent earphone with hearing protection and hearing compensation |
| CN112752195A (en) * | 2020-12-30 | 2021-05-04 | 恒玄科技(上海)股份有限公司 | Audio power amplifier processing method and audio power amplifier system for earphone |
| CN112752188A (en) * | 2021-02-03 | 2021-05-04 | 深圳市逸音科技有限公司 | Intelligent Bluetooth noise reduction earphone with enhanced external environment sound and enhancement method thereof |
| CN112887856A (en) * | 2021-01-25 | 2021-06-01 | 湖南普奇水环境研究院有限公司 | Sound processing method and system for reducing noise |
| CN113163287A (en) * | 2021-04-06 | 2021-07-23 | 深圳市宏杰兴业科技有限公司 | Active noise reduction earphone and power saving method thereof |
| CN114125625A (en) * | 2021-10-28 | 2022-03-01 | 歌尔科技有限公司 | Noise reduction adjustment method, earphone and computer readable storage medium |
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| CN110418238A (en) * | 2019-08-21 | 2019-11-05 | 深圳市昂思科技有限公司 | A kind of noise reduction bluetooth headset |
| CN111083591A (en) * | 2019-12-13 | 2020-04-28 | 恒玄科技(北京)有限公司 | Configuration method and device of noise reduction earphone and noise reduction earphone |
| CN112312255A (en) * | 2020-06-02 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent voice-reducing earphone and noise reduction algorithm based on audio decoder |
| CN112312256B (en) * | 2020-07-30 | 2023-08-01 | 深圳市逸音科技有限公司 | Intelligent active noise reduction earphone based on digital communication |
| CN112312256A (en) * | 2020-07-30 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent active noise reduction earphone based on digital communication |
| CN112312258A (en) * | 2020-09-08 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent earphone with hearing protection and hearing compensation |
| CN112055279A (en) * | 2020-09-10 | 2020-12-08 | 江苏紫米电子技术有限公司 | Earphone noise reduction method and device, earphone and medium |
| CN112752195A (en) * | 2020-12-30 | 2021-05-04 | 恒玄科技(上海)股份有限公司 | Audio power amplifier processing method and audio power amplifier system for earphone |
| CN112887856A (en) * | 2021-01-25 | 2021-06-01 | 湖南普奇水环境研究院有限公司 | Sound processing method and system for reducing noise |
| CN112752188A (en) * | 2021-02-03 | 2021-05-04 | 深圳市逸音科技有限公司 | Intelligent Bluetooth noise reduction earphone with enhanced external environment sound and enhancement method thereof |
| CN113163287A (en) * | 2021-04-06 | 2021-07-23 | 深圳市宏杰兴业科技有限公司 | Active noise reduction earphone and power saving method thereof |
| CN114125625A (en) * | 2021-10-28 | 2022-03-01 | 歌尔科技有限公司 | Noise reduction adjustment method, earphone and computer readable storage medium |
| CN114125625B (en) * | 2021-10-28 | 2022-07-22 | 歌尔科技有限公司 | Noise reduction adjustment method, earphone and computer readable storage medium |
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