CN110099323A - A kind of active noise reduction earphone - Google Patents
A kind of active noise reduction earphone Download PDFInfo
- Publication number
- CN110099323A CN110099323A CN201910434244.3A CN201910434244A CN110099323A CN 110099323 A CN110099323 A CN 110099323A CN 201910434244 A CN201910434244 A CN 201910434244A CN 110099323 A CN110099323 A CN 110099323A
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- low
- noise reduction
- frequency
- speaker units
- shell
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of active noise reduction earphones, including shell, the front end of shell has acoustic aperture, feedback microphones, low-frequency speaker units, middle/high frequency loudspeaker unit and the Dolby circuit for picking up ambient sound are provided in shell, feedback microphones are only electrically connected with low-frequency speaker units by Dolby circuit.Using active noise reduction earphone provided by the invention, feedback microphones collect the environmental noise inside earphone and by Dolby circuit processing one identical as environmental noise amplitude, opposite in phase signal tremendously low frequency loudspeaker units of output, since the low frequency reproduction lower limit of low-frequency speaker units is low, high-frequency cut-off frequency is low, therefore decayed by the sound high frequency inverse sound wave that low-frequency speaker units issue, while realizing noise reduction, rf amplitude is physically reduced.Without reducing rf amplitude by adjusting filter, high frequency is avoided by way of physics and is uttered long and high-pitched sounds.
Description
Technical field
The present invention relates to ear phone technology fields, more specifically to a kind of active noise reduction earphone.
Background technique
In recent years, active noise reduction earphone is by high praise, to meet the needs of song is listened in people's peace and quiet.Active noise reduction earphone
Noise reduction mode is commonly divided into simulation noise reduction and digital noise reduction, passes through the design generation of filter phase equal with outside noise amplitude
The opposite signal in position, to realize noise reduction effect.Common noise reduction type includes feed forward noise reduction, feedback noise reduction and mixing noise reduction,
It is widely used in wear-type, ear type, In-Ear Headphones etc..However the design of filter is led mutually by two aspect of phase and amplitude
System easily causes the problem of high frequency is uttered long and high-pitched sounds in feedback noise reduction, influence using.
It is current those skilled in the art in conclusion how to efficiently solve the problems such as feedback noise reduction earphone high frequency is uttered long and high-pitched sounds
Member's problem to be solved.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of active noise reduction earphone, the structure of the active noise reduction earphone is set
The problem of feedback noise reduction earphone high frequency is uttered long and high-pitched sounds can be effectively avoided in meter.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of active noise reduction earphone, including shell, the front end of the shell have acoustic aperture, and setting is useful in the shell
Low-frequency speaker units, middle/high frequency loudspeaker unit and drop are provided in the feedback microphones for picking up ambient sound, in the shell
Noise cancellation circuit, the feedback microphones are only electrically connected with the low-frequency speaker units by the Dolby circuit.
Preferably, in above-mentioned active noise reduction earphone, the front ends of the low-frequency speaker units have barrier component with institute
State shell and surround low-frequency speaker units ante-chamber, and have on the barrier component be connected to the cavity of the barrier member forward end with
The acoustic conducting pipe of the low-frequency speaker units ante-chamber, the middle/high frequency loudspeaker unit are set to the cavity of barrier member forward end
It is interior.
Preferably, in above-mentioned active noise reduction earphone, the feedback microphones are set in the cavity of barrier member forward end.
Preferably, in above-mentioned active noise reduction earphone, before the middle/high frequency loudspeaker unit is fixed on the barrier component
On end face.
Preferably, it in above-mentioned active noise reduction earphone, offers on the front end face of the barrier component for installing in described
The mounting groove of tweeter unit, the rear end of the middle/high frequency loudspeaker unit are bonded the bottom surface installation of the mounting groove.
Preferably, in above-mentioned active noise reduction earphone, woofer list is provided on rear side of the low-frequency speaker units
First back cavity.
Preferably, in above-mentioned active noise reduction earphone, the barrier component is partition, the outer rim of the partition and the shell
Inner wall offset.
Preferably, in above-mentioned active noise reduction earphone, the partition and the shell are integrally formed.
Preferably, in above-mentioned active noise reduction earphone, the acoustic conducting pipe is in straight tube-like, and tube wall seamlessly transits.
Preferably, in above-mentioned active noise reduction earphone, the front end of the shell is connected with the ear muff for being inserted into ear.
Active noise reduction earphone provided by the invention includes shell, feedback microphones, low-frequency speaker units, medium-high frequency loudspeaking
Device unit and Dolby circuit.Wherein, the front end of shell has acoustic aperture, and feedback microphones, low-frequency speaker units, medium-high frequency are raised
Sound device unit and Dolby circuit are all set in shell.For feedback microphones for picking up ambient sound, feedback microphones pass through noise reduction
Circuit is connect with low-frequency speaker units, and middle/high frequency loudspeaker unit does not access Dolby circuit.
Using active noise reduction earphone provided by the invention, audio passes through low-frequency speaker units and middle/high frequency loudspeaker unit
Collective effect be played out, gone out acoustic aperture outflow.Meanwhile feedback microphones pick up the environmental noise in earphone, due to noise reduction electricity
Road is connected between feedback microphones and low-frequency speaker units, and middle/high frequency loudspeaker unit is not attached in Dolby circuit, therefore
Feedback microphones collect earphone inside environmental noise and by Dolby circuit processing output one it is identical as environmental noise amplitude,
The signal tremendously low frequency loudspeaker unit of opposite in phase, since the low frequency reproduction lower limit of low-frequency speaker units is low, high-frequency cut-off frequency
Rate is low, therefore is decayed by the sound high frequency inverse sound wave that low-frequency speaker units issue, while realizing noise reduction, from physics
On reduce rf amplitude.Therefore, active noise reduction earphone provided by the invention, without reducing high frequency width by adjusting filter
Degree, avoids high frequency by way of physics and utters long and high-pitched sounds.
In one preferred embodiment, the front end of low-frequency speaker units has barrier component low to surround with shell
Speaker units ante-chamber, and there is the cavity of connection barrier member forward end and low-frequency speaker units ante-chamber on barrier component
Acoustic conducting pipe, middle/high frequency loudspeaker unit are set in the cavity of barrier member forward end.Therefore Dolby circuit is back to woofer
The signal that unit issues it, when by low-frequency speaker units ante-chamber harmony conduit, due in acoustic conducting pipe sound wave it is viscous
Stagnant effect, and the thermal losses etc. generated in low-frequency speaker units ante-chamber harmony conduit can generate very high frequency
Big loss, so that high frequency is further decayed, high-frequency cut-off frequency is reduced, and is preferably avoided high frequency and is uttered long and high-pitched sounds.To sum up, noise reduction electricity
After the signal of road processing output decays to high frequency when being issued by low-frequency speaker units, the sound of sending is raised by low frequency
Sound device unit ante-chamber is decayed again with when acoustic conducting pipe, preferably physically reduces rf amplitude, is avoided high frequency and is uttered long and high-pitched sounds.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of the section structure of the active noise reduction earphone of a specific embodiment of the invention；
Fig. 2 is Section A-A schematic diagram in Fig. 1；
Fig. 3 is the feedback noise reduction schematic illustration of active noise reduction earphone in Fig. 1.
It is marked in attached drawing as follows:
Shell 1, feedback microphones 2, low-frequency speaker units 3, middle/high frequency loudspeaker unit 4, out acoustic aperture 5, barrier component
6, low-frequency speaker units ante-chamber 7, acoustic conducting pipe 8, ear muff 9, low-frequency speaker units back cavity 10.
Specific embodiment
The embodiment of the invention discloses a kind of active noise reduction earphones, avoid feedback noise reduction earphone high in a manner of through physics
Frequency is uttered long and high-pitched sounds.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the cross-section structure signal of the active noise reduction earphone of a specific embodiment of the invention
Figure；Fig. 2 is Section A-A schematic diagram in Fig. 1.
In a specific embodiment, active noise reduction earphone provided by the invention includes shell 1, feedback microphones 2, low frequency
Loudspeaker unit 3, middle/high frequency loudspeaker unit 4 and Dolby circuit.
Wherein, the front end of shell 1 has acoustic aperture 5, feedback microphones 2, low-frequency speaker units 3, middle/high frequency loudspeaker
Unit 4 and Dolby circuit are all set in shell 1.Shell 1 is the external structure of active noise cancelling headphone, and shape is according to earphone
Type and the corresponding setting of specifically used requirement, are not specifically limited herein.Acoustic aperture 5 is set to the front end of shell 1 out, then hereafter mentions
To shell 1 in each component front-rear position relationship in be close to the direction for going out acoustic aperture 5 before, it is opposite far from going out acoustic aperture 5
After direction is.The shape of acoustic aperture 5, size etc. are set as needed out, are not construed as limiting herein.
Feedback microphones 2, which are set in shell 1, is used to pick up ambient sound, that is, the acquisition of feedback microphones 2 is earphone
The ambient sound that internal receipt arrives.The first loudspeaker unit and the second loudspeaker unit are provided in shell 1, feedback microphones 2 are logical
Cross Dolby circuit is electrically connected with one of the first loudspeaker unit and the second loudspeaker unit, and connect with Dolby circuit one
Person is low-frequency speaker units 3, and another one is middle/high frequency loudspeaker unit 4.It is, being provided with woofer in shell 1
Unit 3 and middle/high frequency loudspeaker unit 4, feedback microphones 2 are connect by Dolby circuit with low-frequency speaker units 3, and middle height
Speaker units 4 do not access Dolby circuit.
It should be noted that low-frequency speaker units 3 refer to that low frequency reproduction lower limit is low, the low loudspeaker of high-frequency cut-off frequency,
It is mainly responsible for playback low-frequency sound, vibrational system quality is larger, pliable larger, F0It is low.Middle/high frequency loudspeaker unit 4 refers to low frequency
Lower limit for height is reset, the high loudspeaker of high-frequency cut-off frequency is mainly responsible for and resets medium-high frequency sound, and vibrational system quality is smaller,
It is pliable smaller.Specifically, the frequency range of low-frequency speaker units 3 can be 20Hz~3kHz, middle/high frequency loudspeaker unit 4
Frequency range can be 500Hz~20kHz.
Dolby circuit is used to receive the signal of the acquisition of feedback microphones 2 and through making processing returns to tremendously low frequency loudspeaker unit 3
Its output is identical as noise magnitude, opposite in phase signal.The specific structure of Dolby circuit conventional noise reduction during refer to the prior art
Circuit setting, details are not described herein again.
Pass through low frequency loudspeaker by setting low-frequency speaker units 3 and middle/high frequency loudspeaker unit 4, the audios such as music signal
Device unit 3 and 4 collective effect of middle/high frequency loudspeaker unit are played out.And in feedback noise reduction, referring to Fig. 3, Fig. 3 is main in Fig. 1
The feedback noise reduction schematic illustration of dynamic noise cancelling headphone, G are the biography for the acoustical passage that low-frequency speaker units 3 arrive feedback microphones 2
Delivery function.Since Dolby circuit is connected between feedback microphones 2 and low-frequency speaker units 3, middle/high frequency loudspeaker unit 4 is not
It is connected in Dolby circuit, that is, Dolby circuit only accesses low-frequency speaker units 3, and does not access middle/high frequency loudspeaker list
Member 4, therefore middle/high frequency loudspeaker unit 4 and it is not involved in feedback noise reduction.Dolby circuit receives the signal that feedback microphones 2 acquire and warp
Processing returns to tremendously low frequency loudspeaker unit 3, when making its output signal identical as noise magnitude, opposite in phase, high frequency inverse sound
Wave can not issue via low-frequency speaker units 3 and be decayed, and physically reduce rf amplitude.
Using active noise reduction earphone provided by the invention, audio passes through low-frequency speaker units 3 and middle/high frequency loudspeaker list
The collective effect of member 4 is played out, and is gone out the outflow of acoustic aperture 5.Meanwhile feedback microphones 2 pick up the environmental noise in earphone, due to drop
Noise cancellation circuit is connected between feedback microphones 2 and low-frequency speaker units 3, and middle/high frequency loudspeaker unit 4 is not attached to noise reduction electricity
Lu Zhong, therefore feedback microphones 2 collect the environmental noise inside earphone and by Dolby circuit processing output one and environmental noises
Amplitude is identical, opposite in phase signal tremendously low frequency loudspeaker unit 3, since the low frequency reproduction lower limit of low-frequency speaker units 3 is low,
High-frequency cut-off frequency is low, therefore is decayed by the sound high frequency inverse sound wave that low-frequency speaker units 3 issue, and realizes noise reduction
Meanwhile physically reducing rf amplitude.Therefore, active noise reduction earphone provided by the invention, without by adjusting filter
Reduce rf amplitude, avoids high frequency by way of physics and utter long and high-pitched sounds.
Further, the front end of low-frequency speaker units 3 has barrier component 6 to surround woofer list with shell 1
First ante-chamber 7, and there is the cavity of connection 6 front end of barrier component and the acoustic conducting pipe of low-frequency speaker units ante-chamber 7 on barrier component 6
8, middle/high frequency loudspeaker unit 4 is set in the cavity of 6 front end of barrier component.Acoustic conducting pipe 8 specifically can be set in barrier component 6
Middle position, also can be set in the edge of barrier component 6.When acoustic conducting pipe 8 is set to the edge of barrier component 6, both may be used
It can also be in a side opening to be in closed tube, opening offsets with shell 1 to surround closed tube.
By the setting of barrier component 6, low-frequency speaker units ante-chamber 7 is set in the front end of low-frequency speaker units 3, it should
Low-frequency speaker units ante-chamber 7 is connected to the cavity of 6 front end of barrier component by acoustic conducting pipe 8, and then is connected to acoustic aperture 5 out.Sound
The audio signals such as music signal are by 4 playback time of low-frequency speaker units 3 and middle/high frequency loudspeaker unit, due to middle/high frequency loudspeaker
Unit 4 is located in the cavity of 6 front end of barrier component, thus its sound can't decay, therefore replaying effect is unaffected.And it participates in
The de-noising signal of feedback noise reduction, i.e. Dolby circuit are back to the signal that low-frequency speaker units 3 issue it, by low frequency loudspeaker
When device unit ante-chamber 7 and acoustic conducting pipe 8 transmit, due to the viscous effect of sound wave in acoustic conducting pipe 8, and before low-frequency speaker units
The thermal losses etc. that chamber 7 and acoustic conducting pipe 8 generate when transmitting can generate very big loss to high frequency, so that high frequency is further decayed,
High-frequency cut-off frequency reduces, and preferably avoids high frequency and utters long and high-pitched sounds.To sum up, after low-frequency speaker units 3 decay to high frequency, hair
Sound out is decayed again when by low-frequency speaker units ante-chamber 7 with acoustic conducting pipe 8, preferably physically reduces high frequency
Amplitude avoids high frequency and utters long and high-pitched sounds without reducing rf amplitude by adjusting filter.
With low-frequency speaker units 3 use diameter forLoudspeaker for, its front end be arranged a volume be
0.7cm3Low-frequency speaker units ante-chamber 7, and be arranged a sectional area be 1mm2, the phonocatheter of a length of 5mm, by simulating, verifying,
Signal f after low-frequency speaker units ante-chamber 7 and acoustic conducting pipe 8 transmit0It reduces, low frequency increases, high frequency attenuation, cutoff frequency drop
It is low.And by simulating, verifying, low-frequency speaker units ante-chamber 7 is bigger, f0Lower, high frequency attenuation is more.Specific woofer
Unit ante-chamber 7 and 8 size of acoustic conducting pipe are accordingly arranged according to earphone actual size and 3 characteristic of low-frequency speaker units, in space
Under conditions of structure allows, the volume of low-frequency speaker units ante-chamber 7 is bigger, more preferable to the attenuating of high frequency.Acoustic conducting pipe 8
Sectional area is smaller, length is bigger more preferable to the attenuating of high frequency, and then the effect for preventing high frequency from uttering long and high-pitched sounds is more preferable.
It should be noted that the specific structure of above-mentioned barrier component 6 can be not construed as limiting, it is used only as in woofer
3 front end of unit is separated out low-frequency speaker units ante-chamber 7, and opens up acoustic conducting pipe 8 on it.Specifically, barrier component 6 is
Partition, that is, barrier component 6 are plate structure, and the thickness of specific partition is set as needed, and the thickness of partition is bigger, then sound
The length of conduit 8 can accordingly be arranged it is longer, with high frequency of preferably decaying.The outer rim of partition can offset with the inner wall of shell 1,
It can specifically bond with the inner wall of shell 1 or be fixedly connected using other modes.And then partition and shell 1 surround woofer
Unit ante-chamber 7.As needed, barrier component 6 can also use block structure or other conventional shapes.
Specifically, partition and shell 1 are integrally formed.Namely partition is structure as a whole with shell 1, i.e., partition is by shell
1 inner wall extends inward to be formed.Integral structure is convenient for molding and connects reliable, structural strength height.Certainly, partition as needed with
Shell 1 may be to pass through the conventional split type structure for being fixedly connected with mode and connecting.
In above-mentioned each embodiment with barrier component 6, feedback microphones 2 are set to the cavity of 6 front end of barrier component
It is interior.1 inner wall of shell can be specifically fixed on and be located at the front end of acoustic conducting pipe 8 at acoustic conducting pipe 8.Feedback microphones 2 are arranged
In front end cavity, can effectively pick up received environmental noise in earphone, with the noise reduction process for Dolby circuit provide reliably according to
According to.The specific fixed form of feedback microphones 2 can refer to conventional arrangement in the prior art, be not specifically limited herein.
Further, middle/high frequency loudspeaker unit 4 is fixed on the front end face of barrier component 6.Middle/high frequency loudspeaker unit 4
It is set in the cavity of 6 front end of barrier component, and then the sound of its sending is without the work of woofer ante-chamber grade acoustic conducting pipe 8
With high frequency will not decay, and can be specifically installed on the front end face of barrier component 6, be easily installed operation.As needed, may be used
Middle/high frequency loudspeaker unit 4 to be fixed on the inner wall of shell 1 etc..
Further, the installation for installing middle/high frequency loudspeaker unit 4 is offered on the front end face of barrier component 6
Slot, the bottom surface installation of the rear end fitting mounting groove of middle/high frequency loudspeaker unit 4.By the setting of mounting groove, raised convenient for medium-high frequency
The positioning and installation of sound device unit 4, can specifically be connected in mounting groove.Work based on middle/high frequency loudspeaker unit 4 is special
Property, its rear end can be bonded the bottom surface installation of mounting groove, to save space in the front-back direction, effectively for woofer list
First ante-chamber 7 reserves bigger space, further promotes the attenuating to high frequency.The thickness of mounting groove specifically can be set to
The consistency of thickness of middle/high frequency loudspeaker unit 4.When then middle/high frequency loudspeaker unit 4 the is installed in it and edge of mounting groove is flat
Together, then mounting groove can preferably to middle/high frequency loudspeaker 4 support limit of unit while, also make middle/high frequency loudspeaker unit 4
The sound of sending can be transmitted preferably, and space is more effectively utilized, so that integral layout is more compact, structural strength is more
It is high.
In order to guarantee effective work of low-frequency speaker units 3, the rear side of low-frequency speaker units 3 in the various embodiments described above
It is provided with low-frequency speaker units back cavity 10.The shape of specific low-frequency speaker units back cavity 10 is set as needed,
Size is as big as possible in the case where space allows, and the space of low-frequency speaker units back cavity 10 is bigger, low-frequency speaker units 3
Working effect it is more excellent.
In the above-mentioned embodiment for being each provided with acoustic conducting pipe 8, acoustic conducting pipe 8 is in straight tube-like, and tube wall seamlessly transits.By acoustic conductance
Pipe 8 is set as straight tube-like, molding easy to process, and straight tube-like structure, and tube wall smooth transition can preferably be played to sound wave
Viscous effect further promotes the decaying to high frequency.
Further, the front end of shell 1 is connected with the ear muff 9 for being inserted into ear.Ear muff 9 can specifically be coated on and speak
5 outside of hole, i.e., 9 sets of ear muff outside acoustic aperture 5 out, do not block out normally speaking for acoustic aperture 5.The shape of ear muff 9 can be set to
It is similar to human ear shape, to be preferably bonded human ear, promote user experience.Ear muff 9 can preferably use soft material, when wearing
It is more comfortable, it also can be preferably bonded user's ear, to play certain passive Noise Reduction.
The other structures such as battery, the chip of active noise reduction earphone can refer to setting for conventional active noise reduction earphone in the prior art
It sets, details are not described herein again.The structures such as battery, chip specifically can be set in the rearmost end of shell 1, i.e. low-frequency speaker units 3
Rear be then preferably disposed on low-frequency speaker units back cavity 10 with low-frequency speaker units back cavity 10
Rear side.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. the front end of a kind of active noise reduction earphone, including shell (1), the shell (1) has acoustic aperture (5), the shell (1)
Inside it is provided with the feedback microphones (2) for picking up ambient sound, which is characterized in that be provided with low frequency loudspeaker in the shell (1)
Device unit (3), middle/high frequency loudspeaker unit (4) and Dolby circuit, the feedback microphones (2) by the Dolby circuit only with
Low-frequency speaker units (3) electrical connection.
2. active noise reduction earphone according to claim 1, which is characterized in that the front end of the low-frequency speaker units (3)
With barrier component (6) to be surrounded low-frequency speaker units ante-chamber (7) with the shell (1), and have on the barrier component (6)
Have be connected to barrier component (6) front end cavity and the low-frequency speaker units ante-chamber (7) acoustic conducting pipe (8), it is described in
Tweeter unit (4) is set in the cavity of barrier component (6) front end.
3. active noise reduction earphone according to claim 2, which is characterized in that the feedback microphones (2) are set to described
In the cavity of barrier component (6) front end.
4. active noise reduction earphone according to claim 2, which is characterized in that the middle/high frequency loudspeaker unit (4) is fixed
In on the front end face of the barrier component (6).
5. active noise reduction earphone according to claim 4, which is characterized in that opened on the front end face of the barrier component (6)
Equipped with the mounting groove for installing the middle/high frequency loudspeaker unit (4), the rear end fitting of the middle/high frequency loudspeaker unit (4)
It installs the bottom surface of the mounting groove.
6. active noise reduction earphone according to claim 5, which is characterized in that the rear side of the low-frequency speaker units (3)
It is provided with low-frequency speaker units back cavity (10).
7. active noise reduction earphone according to claim 2, which is characterized in that the barrier component (6) be partition, it is described every
The outer rim of plate and the inner wall of the shell (1) offset.
8. active noise reduction earphone according to claim 7, which is characterized in that the partition and the shell (1) one at
Type.
9. according to the described in any item active noise reduction earphones of claim 2-8, which is characterized in that the acoustic conducting pipe (8) is in straight tube
Shape, and tube wall seamlessly transits.
10. active noise reduction earphone according to claim 9, which is characterized in that the front end of the shell (1), which is connected with, to be used for
The ear muff (9) being inserted into ear.
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| CN201910434244.3A CN110099323B (en) | 2019-05-23 | 2019-05-23 | Active noise reduction earphone |
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|---|---|---|---|
| CN201910434244.3A CN110099323B (en) | 2019-05-23 | 2019-05-23 | Active noise reduction earphone |
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| CN110856070A (en) * | 2019-11-20 | 2020-02-28 | 南京航空航天大学 | Initiative sound insulation earmuff that possesses pronunciation enhancement function |
| CN111134956A (en) * | 2019-12-24 | 2020-05-12 | 杭州鐵三角科技有限公司 | Noise reduction earplug |
| WO2021098014A1 (en) * | 2019-11-22 | 2021-05-27 | 歌尔股份有限公司 | Active noise reduction acoustic unit and sound-generating body |
| WO2021174780A1 (en) * | 2020-03-03 | 2021-09-10 | 青岛海尔空调器有限总公司 | Active noise reduction air conditioner and control method therefor |
| CN114666696A (en) * | 2020-12-23 | 2022-06-24 | 华为技术有限公司 | Wireless noise reduction earphone |
| WO2022227992A1 (en) * | 2021-04-29 | 2022-11-03 | Oppo广东移动通信有限公司 | Audio playback method and audio playback device |
| CN115623400A (en) * | 2022-12-16 | 2023-01-17 | 共达电声股份有限公司 | Electronic equipment |
| EP4102856A4 (en) * | 2021-04-23 | 2023-06-21 | Samsung Electronics Co., Ltd. | Electronic device comprising speaker and microphone |
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