CN109151643A - Earphone and headphone unit - Google Patents
Earphone and headphone unit Download PDFInfo
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- CN109151643A CN109151643A CN201811043275.8A CN201811043275A CN109151643A CN 109151643 A CN109151643 A CN 109151643A CN 201811043275 A CN201811043275 A CN 201811043275A CN 109151643 A CN109151643 A CN 109151643A
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- headphone unit
- feedback microphones
- sounding body
- feedback
- earphone
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Classifications
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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
- H04R1/1058—Manufacture or assembly
-
- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
-
- 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
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention relates to earphone manufacturing field, presently filed embodiment provides a kind of headphone unit and earphone.Headphone unit includes: earphone case and is arranged in the intracorporal sounding body of ear casing；Headphone unit further includes the feedback microphones being arranged on earphone case, and the circle wall of the voice coil of feedback microphones and sounding body is oppositely arranged, and earphone includes headphone unit.Technical solution provided herein can be avoided blocking of the feedback microphones to sounding body top dome sound wave, promote sound quality.
Description
Technical field
The present invention relates to earphone manufacturing field, in particular to a kind of earphone and the headphone unit being arranged on earphone.
Background technique
To realize better music sense of hearing experience and speech quality under various usage scenarios, the noise reduction of earphone need to be paid close attention to
Energy.The denoising device of conventional earphone is passive type denoising device, by using composite materials such as plastics, foam, establishment nets to sound
Sound is isolated, and will increase the volume and weight of denoising device in this way, inconvenient to use.Simple passive sound insulation has been unable to meet people
Pursuit to quality of the life, to expedite the emergence of active earphone, and the active earphone performance of the prior art have it is to be hoisted.
Summary of the invention
To solve the above-mentioned problems or it at least is partially solved above-mentioned technical problem, in the embodiment of the application
In, provide a kind of headphone unit, comprising: earphone case and setting are in the intracorporal sounding body of ear casing；Headphone unit further includes
Feedback microphones on earphone case are set, and the circle wall of the voice coil of feedback microphones and sounding body is oppositely arranged.
Headphone unit provided by presently filed embodiment is picked up by feedback microphones through the outer of earphone case
Boundary's noise, and sounding body is passed to after being processed into the acoustical signal opposite with noise signal.Sounding body issue with noise phase
Anti- sound wave can offset ambient noise, make us ear and receive sound provided by sounding body more purely, promote sound quality.Phase
For the prior art, presently filed embodiment is by setting feedback microphones are opposite with the circle wall of the voice coil of sounding body
It sets, avoids blocking of the feedback microphones to sounding body top dome sound wave, improve sound quality.Further, since feedback microphones are not necessarily to
It is set to the position of sounding body top dome, therefore top dome vibration is not easy to touch feedback microphones, structure and ID design are simpler.
Optionally, earphone case includes ontology and the horn hood that is set on ontology；Feedback microphones are located on horn hood.
Sounding body and human ear can be separated by horn hood, sounding body is avoided to be pressurized and make between human ear and sounding body
Distance is optimal distance, allows users to hear more soft sound.And feedback microphones are set on horn hood, i.e.,
Feedback microphones are between sounding body and human ear, so that the ambient noise that picks up of feedback microphones and will be passed to human ear
Ambient noise height is consistent, and the reverse phase sound wave for issuing sounding body more accurately matches counteracting with ambient noise.
Still optionally further, the axis parallel of the central axes of feedback microphones and voice coil, and the axis of feedback microphones
The extended line of line passes through the circle wall of the voice coil.
When the axis parallel of the central axes of feedback microphones and voice coil, sounding body receives the side of processed noise signal
The opposite direction that the sound wave that Xiang Yuqi is issued can be located along the same line, more direct can effectively eliminate noise.
The extended line of the central axes of feedback microphones passes through the circle wall of the voice coil, defines feedback microphones and sounding body
Relative position, the interference for the sound that can farthest avoid feedback microphones itself from issuing sounding body.
Still optionally further, several beams are provided on horn hood, the gap between each fine strain of millet is constituted for sounding body
The sounding channel that sound passes through, feedback microphones are arranged on beam.
It is designed as having the structure of beam to increase the structural strength of horn hood itself horn hood, ensure that product quality.
Meanwhile the sounding channel formed using the gap between each beam, path is provided for the propagation that sounding body makes a sound, is made
The sound that human ear receives becomes apparent from, is loud.
Feedback microphones are arranged on beam, extraly will not form blocking by the sound to sounding body.The close feedback wheat of beam
The position of gram wind is provided with several through-holes, is conducive to correct the noise signal that feedback microphones issue, its is made to pass letter phase curve
It is able to decline in high band, utter long and high-pitched sounds risk to reduce high frequency.
Still optionally further, feedback microphones are located on the intersection point of the beam of two intersections, further improve stable structure
Property.Also, due to feedback microphones be located at two intersection beam intersection point on, can in the Liang Tiaoliang being attached thereto,
It is exactly that through-hole is all set on four direction, utters long and high-pitched sounds risk to further reduce high frequency.
Optionally, the diameter that horn hood blocks the position of the sounding body is greater than or equal to 6mm.It is arranged in 6mm or more,
Bounds reflection occurs at horn hood center for the low-frequency sound wave that sounding body can be made to generate, and then increases acoustic pressure, improves earphone
The low frequency amplitude of unit further increases the debugging space of noise reduction.
Optionally, headphone unit further includes the flannelette covered on the horn hood.Flannelette can reduce sounding body generation sound
The unstable oscillation of wave is effectively reduced low frequency and utters long and high-pitched sounds risk.
Optionally, the Helmholz resonance pipe being in communication with the outside is provided on the side wall of horn hood backwards of ontology.It utilizes
The cavity resonance that enclosure body and Helmholz resonance pipe generate effectively enhances low frequency amplitude and reduces the resonance frequency of headphone unit
Rate is conducive to improve low frequency noise reduction.
Optionally, the resonance frequency of feedback microphones is within the scope of 10KHz to 21KHz.Improve the frequency of feedback microphones
Curve is rung, is conducive to increase the effective bandwidth of noise reduction, while improving the rf amplitude of feedback microphones and then obtaining higher phase
Position positive slope, can effectively eliminate the noise picked up.
Optionally, feedback microphones are electric capacitor microphone.Electret condenser microphone is small in size, structure is simple
List, electroacoustic performance are good, are suitable for headphone unit, and its price is lower, reduces production cost.
Present invention also provides a kind of earphones, including above-mentioned headphone unit.
Detailed description of the invention
It, below will be to embodiment in order to illustrate more clearly of the application embodiment or technical solution in the prior art
Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that the accompanying drawings in the following description is only used for
The some embodiments for illustrating the application, for those of ordinary skill in the art, in the premise not made the creative labor
Under, be also possible to obtain other drawings based on these drawings in unmentioned technical characteristic, connection relationship or even method and step.
Fig. 1 is schematic cross-sectional view of the headphone unit of the application in not set feedforward microphone；
Fig. 2 is schematic cross-sectional view of the headphone unit of the application when being provided with feedforward microphone；
Fig. 3 is the overlooking structure diagram of the application headphone unit；
Fig. 4 is partial schematic diagram of the application headphone unit at feedback microphones；
Fig. 5 is the signal flow schematic diagram of the application headphone unit；
Fig. 6 is the operation principle schematic diagram of the application headphone unit.
Description of symbols
1- shell；11- ontology；12- horn hood；13- beam；14- through-hole；
2- sounding body；21- voice coil；22- encloses wall
3- feedback microphones；
4- feedforward microphone.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
The technical solution of the application is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application
A part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall in the protection scope of this application.
Embodiment one
This application provides a kind of audio frequency apparatus more particularly to a kind of headphone units.
The inventors of the present application found that in the prior art, most active earphones using feedback microphones by being connect
Ambient noise is received, passes to sounding body after filter circuit is handled, it is issued and is made an uproar with the sound wave of noise signal reverse phase with offsetting
Sound.Feedback microphones are usually placed at sounding body top dome position by the headphone unit of such earphone, for receiving and transmitting signal,
However this design can stop the Acoustic Wave Propagation and complex structural designs of sounding body.
To solve the above problems, the application embodiment provides a kind of headphone unit, it is shown in Figure 1, comprising: ear casing
Body 1 and the sounding body 2 being arranged in earphone case 1；
Headphone unit further includes the feedback microphones 3 being arranged on earphone case 1, the sound of feedback microphones 3 and sounding body 2
The circle wall 22 of circle 21 is oppositely arranged.
In terms of existing technologies, presently filed embodiment is by by the voice coil 21 of feedback microphones and sounding body 2
Circle wall 22 be oppositely arranged, avoid blocking of the feedback microphones to 2 top dome sound wave of sounding body, that is, avoid blocking sound wave most strong
Place, improves sound quality.Further, since no setting is required in the position of 2 top dome of sounding body for feedback microphones, therefore top dome vibration is not easy
Feedback microphones are touched, structure and miniaturization ID design are simpler.
Headphone unit provided by presently filed embodiment is picked up by feedback microphones 3 through earphone case 1
Ambient noise, and sounding body 2 is passed to after being processed into the acoustical signal opposite with noise signal.Sounding body 2 issue with make an uproar
The opposite sound wave of sound can offset ambient noise, make us ear and be able to receive sound more pure provided by sounding body 2, mention
Sharp matter.
Headphone unit work when, feedback microphones 3 pick up ambient noise signal obtained after feed circuit is handled with
The opposite acoustical signal of noise signal, is then input to sounding body 2 for this acoustical signal, and sounding body 2 issues the sound wave opposite with noise
Ambient noise can be offset.However, due to the possible loss section partial music signal of the sound wave opposite with noise that sounding body 2 issues,
So in the present embodiment, it is shown in Figure 5, EQ compensation circuit can also be added to compensate undamaged portion.Compensated sound
Music signal is input to sounding body 2, and sounding body 2 will be sent out together with compensated music signal and the acoustic signals opposite with ambient noise
Out, the opposite acoustic signals of ambient noise offset each other with ambient noise, at this time the human ear pure tone that can only receive that treated
Music signal.
As further preferred, shown in Figure 1, in presently filed embodiment, earphone case 1 may include ontology 11
With the horn hood 12 being set on ontology 11, ear casing ontology 11 and horn hood 12 can be avoided sounding body 2 and be pressurized, while by
Horn hood 12 can separate sounding body 2 and human ear so that the distance between human ear and sounding body 2 be in listen to music it is optimal away from
From.
Feedback microphones 3 are set on horn hood 12, i.e. feedback microphones 3 are between sounding body 2 and human ear, so that instead
The ambient noise that feedback microphone 3 picks up is consistent with that will be passed to the ambient noise height of human ear, so that sounding body 2 be made to issue
Reverse phase sound wave more accurately matches counteracting with ambient noise.
In addition, it is shown in Figure 2, feedforward microphone 4 can also be set on earphone case 1.Feedforward microphone 4 equally may be used
It is oppositely arranged with the circle wall 22 with voice coil 21.When the circle wall 22 of feedforward microphone 4 and voice coil 21 is oppositely arranged, can equally prevent
The only location conflicts between feedforward microphone 4 and sounding body 2, so that headphone unit is more minimized.
It is shown in Figure 6, after feedforward microphone 4 and the pickup ambient noise signal of feedback microphones 3, respectively by feedforward filter
The acoustical signal opposite with noise signal is obtained after wave device and feedback filter processing, two-way acoustical signal is then input to hair simultaneously
Mixing noise reduction is consequently formed in sound body 2.It, can be further by the mixing noise reduction of feedforward microphone 4 and feedback microphones 3
Promote noise reduction effect.
The type selecting of feedforward microphone 4 and feedback microphones 3 can be the same or different.This does not constitute limit to application
It is fixed.
In present embodiment, the sounding body 2 being arranged in earphone case 1 can be using moving coil design, i.e., by permanent magnetic field
In voice coil 21 be connected with vibrating diaphragm, voice coil 21 drives vibrating diaphragm sounding under signal code driving, and the associative perception for generating sound is special
It is not strong, soft flexible low frequency and full intermediate frequency are easily showed, the linking of senior middle school's low frequency is natural and tripping, and whole is flat
Weighing apparatus property is good.
Further, shown in Figure 3, it can be set several beams 13 on horn hood 12, between each beam 13
Gap constitutes the sounding channel passed through for the sound of sounding body 2, and feedback microphones 3 are arranged on beam 13.
Specifically, beam 13 can connect to constitute using 12 center of horn hood as the circular ring structure in the center of circle, each circular ring shape
The radius of beam is incremented by outward by the center of circle, and attachment beam is equipped between each annulus ellbeam.
Attachment beam can be the beam at connection horn hood 12 center and earphone case ontology 11, this kind of beam can be equipped with four,
The corresponding four direction from 12 center of horn hood to external radiation, guarantees stabilized structure.
Feedback microphones 3 are set on the intersection point of the beam 13 of two intersections, are more able to ascend structural stability.It needs to illustrate
, the overall structure of beam 13 does not need to be strictly limited, only with annulus and four perpendicular to each other in present embodiment
It is illustrated for the combination of attachment beam 13.Obviously, those of ordinary skill in the art can also redesign loudspeaker according to demand
The structure of lid 12, for example, it is also possible to be formed as using the center of horn hood 12 as starting point, each beam 13 is along helix to external radiation
Mode connects earphone case ontology 11.
Furthermore structure of beam 13 itself can also there are many alternatives, such as can use the cloth with hole or thin slice etc.
Structure with the channel for passing through the sound of sounding body 2 can also realize the technical purpose of the application to substitute beam 13.
It is designed as having the structure of beam 13 to increase the structural strength of horn hood 12 itself horn hood 12, ensure that product
Quality.Meanwhile the sounding channel formed using the gap between each beam 13, the propagation made a sound for sounding body 2 are provided
Path, the sound for receiving human ear become apparent from, are loud, and feedback microphones 3 are arranged on beam 13, will not be extraly right
The sound of sounding body 2, which is formed, to be stopped, and is conducive to correct the noise signal that feedback microphones 3 issue.
Optionally, headphone unit further includes the flannelette (not illustrating in figure) covered on the horn hood 12.Flannelette can subtract
Small sounding body 2 generates the unstable oscillation of sound wave, and low frequency is effectively reduced and utters long and high-pitched sounds risk.
Optionally, the Helmholz resonance pipe being in communication with the outside is provided on the side wall of horn hood 12 backwards of ontology 11
(not illustrating in figure).The cavity resonance generated using enclosure body 11 and Helmholz resonance pipe, effectively enhances low frequency amplitude simultaneously
The resonance frequency for reducing headphone unit is conducive to improve low frequency noise reduction.Embodiment two
Second embodiment of the present invention provides a kind of headphone unit, second embodiment be first embodiment into
One step is improved, and is mainly theed improvement is that, shown in Figure 1 in second embodiment of the present invention, feedback microphones 3
The axis parallel of central axes and voice coil 21, and the extended line of the central axes of feedback microphones 3 passes through the circle wall 22 of voice coil 21.
Feedback microphones 3 and the circle wall 22 of the voice coil 21 of sounding body 2 are oppositely arranged, and it is solid to can use the carrying of horn hood 12
Determine feedback microphones 3, then the position of feedback microphones 3 can also according to horn hood 12 shape and be arranged, however, when feedback wheat
When the axis parallel of the central axes of gram wind 3 and voice coil 21, the direction that sounding body 2 receives processed noise signal is issued with it
The opposite direction that can be located along the same line of sound wave, more direct can effectively eliminate noise, better effect.
The extended line of the central axes of feedback microphones 3 passes through the circle wall 22 of voice coil 21, defines feedback microphones 3 and sounding
The relative position of body 2, it is ensured that the signal transmission between feedback microphones 3 and sounding body 2, while can farthest avoid anti-
The interference for the sound that feedback microphone 3 itself issues sounding body 2.
Embodiment three
Third embodiment of the present invention provides a kind of headphone unit, and third embodiment is first or second embodiment party
The further improvement of formula, mainly thes improvement is that, in third embodiment of the present invention, the close feedback microphones of beam 13
3 position is provided with several through-holes 14.
For example, with reference to shown in Fig. 4, when feedback microphones 3 are located on the intersection point of the beam 13 of two intersections, what is be attached thereto
Two beams 13, that is, through-hole 14 is all set on four direction.Since sounding body 2 need to receive the noise of the sending of feedback microphones 3
Signal simultaneously issues the sound wave to offset therewith, and positive feedback is also easy to produce with feedback effect simultaneously and utters long and high-pitched sounds, and causes the discomfort of user, through-hole 14
Setting be then conducive to correct feedback microphones 3 issue noise signal, enable its pass letter phase curve high band decline,
It utters long and high-pitched sounds risk to reduce high frequency.
Embodiment four
4th embodiment of the invention provides a kind of headphone unit, and the 4th embodiment is first to third embodiment party
The further improvement of any one embodiment, mainly thes improvement is that in formula, in the 4th embodiment of the invention, loudspeaker
The diameter that lid 12 blocks the position of sounding body 2 is greater than or equal to 6mm.
In present embodiment, horn hood 12 is specially corresponding 1 solid section of earphone case in 21 center of voice coil, sounding body 2
Bounds reflection occurs at horn hood 12 for the low-frequency sound wave of generation, and then increases acoustic pressure, can be improved the low frequency of headphone unit
Amplitude improves the debugging space of noise reduction.
The diameter that horn hood 12 blocks the position of sounding body 2 is bigger, and bounds reflect more complete, the debugging space of noise reduction
Also bigger, which is arranged in 6mm or more, bounds reflection can be made completely, the debugging space of noise reduction is mentioned
It is raised to appropriateness.
Embodiment five
5th embodiment of the invention provides a kind of headphone unit, and the 5th embodiment is first to fourth embodiment party
The further improvement of any one embodiment, mainly thes improvement is that in formula, in the 5th embodiment of the invention, feedback
The resonance frequency of microphone 3 is within the scope of 10KHz to 21KHz.
Feedback microphones 3 are preferably electric capacitor microphone.Electret condenser microphone is small in size, structure is simple,
Electroacoustic performance is good, is suitable for headphone unit, and its price is lower, reduces production cost.
Feedback microphones 3 select resonance frequency in 10KHz to the electric capacitor microphone of 21KHz range, compared to
MEMS microphone low frequency amplitude is high, and phase is negative value, is advantageously implemented higher low-frequency range noise reduction, and feed back wheat
The frequency response curve of gram wind 3 can be promoted due to resonance, be conducive to increase the effective bandwidth of noise reduction.Furthermore, it is understood that can also select
The frequency range of 10KHz to 20KHz.
In the prior art, in order to realize frequency response straight in working frequency range, often the resonance frequency of feedback microphones 3 is arranged
Much higher than at 21KHz, the application selects feedback microphones 3 of the resonance frequency within the scope of 10KHz to 21KHz, can be improved
The rf amplitude of feedback microphones 3.And then higher phase positive slope is obtained, overcome the technology prejudice of the prior art.
Embodiment six
Sixth embodiment of the invention provides a kind of earphone, including headphone unit, specifically, shown in Figure 1,
Its headphone unit includes: earphone case 1 and the sounding body 2 that is arranged in earphone case 1；Headphone unit further includes being arranged in earphone
Feedback microphones 3 on shell 1, feedback microphones 3 and the circle wall 22 of the voice coil 21 of sounding body 2 are oppositely arranged.
In terms of existing technologies, presently filed embodiment is by by the voice coil 21 of feedback microphones 3 and sounding body 2
Circle wall 22 be oppositely arranged, avoid blocking of the feedback microphones to 2 top dome sound wave of sounding body, that is, avoid blocking sound wave most strong
Place, improves sound quality.Further, since no setting is required in the position of 2 top dome of sounding body for feedback microphones, therefore top dome vibration is not easy
Feedback microphones 3 are touched, structure and miniaturization ID design are simpler.
Earphone provided by presently filed embodiment, headphone unit are picked up by feedback microphones 3 through earphone
The ambient noise of shell 1, and sounding body 2 is passed to after being processed into the acoustical signal opposite with noise signal.Sounding body 2 issues
The sound wave opposite with noise can offset ambient noise, make us ear be able to receive it is more pure provided by sounding body 2
Sound promotes sound quality.
Headphone unit work when, feedback microphones 3 pick up ambient noise signal obtained after feed circuit is handled with
The opposite acoustical signal of noise signal, is then input to sounding body 2 for this acoustical signal, and sounding body 2 issues the sound wave opposite with noise
Ambient noise can be offset.However, due to the possible loss section partial music signal of the sound wave opposite with noise that sounding body 2 issues,
So in the present embodiment, it is shown in Figure 5, EQ compensation circuit can also be added to compensate undamaged portion.Compensated sound
Music signal is input to sounding body 2, and sounding body 2 will be sent out together with compensated music signal and the acoustic signals opposite with ambient noise
Out, the opposite acoustic signals of ambient noise offset each other with ambient noise, at this time the human ear pure tone that can only receive that treated
Music signal.
As a further preference, shown in Figure 1, in presently filed embodiment, earphone case 1 may include ontology
11 and the horn hood 12 that is set on ontology 11, ear casing ontology 11 and horn hood 12 can be avoided the compression of sounding body 2, borrow simultaneously
Help horn hood 12 that can separate sounding body 2 and human ear, so that the distance between human ear and sounding body 2, which are in, listens to the optimal of music
Distance.
Feedback microphones 3 are set on horn hood 12, i.e. feedback microphones 3 are between sounding body 2 and human ear, so that instead
The ambient noise that feedback microphone 3 picks up is consistent with that will be passed to the ambient noise height of human ear, so that sounding body 2 be made to issue
Reverse phase sound wave more accurately matches counteracting with ambient noise.
In addition, it is shown in Figure 2, feedforward microphone 4 can also be set on earphone case 1.Feedforward microphone 4 equally may be used
It is oppositely arranged with the circle wall 22 with voice coil 21.When the circle wall 22 of feedforward microphone 4 and voice coil 21 is oppositely arranged, can equally prevent
The only location conflicts between feedforward microphone 4 and sounding body 2, so that headphone unit is more minimized.
It is shown in Figure 6, after feedforward microphone 4 and the pickup ambient noise signal of feedback microphones 3, respectively by feedforward filter
The acoustical signal opposite with noise signal is obtained after wave device and feedback filter processing, two-way acoustical signal is then input to hair simultaneously
Mixing noise reduction is consequently formed in sound body 2.It, can be further by the mixing noise reduction of feedforward microphone 4 and feedback microphones 3
Promote noise reduction quality.
The type selecting of feedforward microphone 4 and feedback microphones 3 can be the same or different.This does not constitute the application and limits
It is fixed.
In present embodiment, the sounding body 2 being arranged in earphone case 1 can be using moving coil design, i.e., by permanent magnetic field
In voice coil 21 be connected with vibrating diaphragm, voice coil 21 drives vibrating diaphragm sounding under signal code driving, and the associative perception for generating sound is special
It is not strong, soft flexible low frequency and full intermediate frequency are easily showed, the linking of senior middle school's low frequency is natural and tripping, and whole is flat
Weighing apparatus property is good.
Further, shown in Figure 3, it can be set several beams 13 on horn hood 12, between each beam 13
Gap constitutes the sounding channel passed through for the sound of sounding body 2, and feedback microphones 3 are arranged on beam 13.
Specifically, beam 13 can connect to constitute using 12 center of horn hood as the circular ring structure in the center of circle, each circular ring shape
The radius of beam is incremented by outward by the center of circle, and attachment beam is equipped between each annulus ellbeam.
Attachment beam can be the beam at connection horn hood 12 center and earphone case ontology 11, this kind of beam can be equipped with four,
The corresponding four direction from 12 center of horn hood to external radiation, guarantees stabilized structure.
Feedback microphones 3 are set on the intersection point of the beam 13 of two intersections, are more able to ascend structural stability.It needs to illustrate
, the overall structure of beam 13 does not need to be strictly limited, only with annulus and four perpendicular to each other in present embodiment
It is illustrated for the combination of attachment beam 13.Obviously, those of ordinary skill in the art can also redesign loudspeaker according to demand
The structure of lid 12, for example, it is also possible to be formed as using the center of horn hood 12 as starting point, each beam 13 is along helix to external radiation
Mode connects earphone case ontology 11.
Furthermore structure of beam 13 itself can also there are many alternatives, such as can use the cloth with hole or thin slice etc.
Structure with the channel for passing through the sound of sounding body 2 can also realize the technical purpose of the application to substitute beam 13.
It is designed as having the structure of beam 13 to increase the structural strength of horn hood 12 itself horn hood 12, ensure that product
Quality.Meanwhile the sounding channel formed using the gap between each beam 13, the propagation made a sound for sounding body 2 are provided
Path, the sound for receiving human ear become apparent from, are loud, and feedback microphones 3 are arranged on beam 13, will not be extraly right
The sound of sounding body 2, which is formed, to be stopped, and is conducive to correct the noise signal that feedback microphones 3 issue.
Optionally, headphone unit further includes the flannelette (not illustrating in figure) covered on the horn hood 12.Flannelette can subtract
Small sounding body 2 generates the unstable oscillation of sound wave, and low frequency is effectively reduced and utters long and high-pitched sounds risk.
Optionally, the Helmholz resonance pipe being in communication with the outside is provided on the side wall of horn hood 12 backwards of ontology 11
(not illustrating in figure).The cavity resonance generated using enclosure body 11 and Helmholz resonance pipe, effectively enhances low frequency amplitude simultaneously
The resonance frequency for reducing headphone unit is conducive to improve low frequency noise reduction.Embodiment seven
7th embodiment of the invention provides a kind of earphone, and the 7th embodiment is the further of sixth embodiment
It improves, mainly thes improvement is that, shown in Figure 1 in the 7th embodiment of the invention, the axis of feedback microphones 3
The axis parallel of line and voice coil 21, and the extended line of the central axes of feedback microphones 3 passes through the circle wall 22 of voice coil 21.
Feedback microphones 3 and the circle wall 22 of the voice coil 21 of sounding body 2 are oppositely arranged, and it is solid to can use the carrying of horn hood 12
Determine feedback microphones 3, then the position of feedback microphones 3 can also according to horn hood 12 shape and be arranged, however, when feedback wheat
When the axis parallel of the central axes of gram wind 3 and voice coil 21, the direction that sounding body 2 receives processed noise signal is issued with it
The opposite direction that can be located along the same line of sound wave, more direct can effectively eliminate noise, better effect.
The extended line of the central axes of feedback microphones 3 passes through the circle wall 22 of voice coil 21, defines feedback microphones 3 and sounding
The relative position of body 2, it is ensured that the signal transmission between feedback microphones 3 and sounding body 2, while can farthest avoid anti-
The interference for the sound that feedback microphone 3 itself issues sounding body 2.
Embodiment eight
8th embodiment of the invention provides a kind of earphone, and the 8th embodiment is the 6th or the 7th embodiment
It is further improved, mainly thes improvement is that, in the 8th embodiment of the invention, the close feedback microphones 3 of beam 13
Position is provided with several through-holes 14.
For example, with reference to shown in Fig. 4, when feedback microphones 3 are located on the intersection point of the beam 13 of two intersections, what is be attached thereto
Two beams 13, that is, through-hole 14 is all set on four direction.Since sounding body 2 need to receive the noise of the sending of feedback microphones 3
Signal simultaneously issues the sound wave to offset therewith, and positive feedback is also easy to produce with feedback effect simultaneously and utters long and high-pitched sounds, and causes the discomfort of user, through-hole 14
Setting be then conducive to correct feedback microphones 3 issue noise signal, enable its pass letter phase curve high band decline,
It utters long and high-pitched sounds risk to reduce high frequency.
Similarly, through-hole 14 can also be opened up in the position of close feedback microphones 3 on the ontology 11 of earphone case, into
It reduces to one step high frequency to utter long and high-pitched sounds risk, promotes earphone performance.
Embodiment nine
9th embodiment of the invention provides a kind of earphone, and the 9th embodiment is in the 6th to the 8th embodiment
The further improvement of any one embodiment, mainly thes improvement is that, in the 9th embodiment of the invention, horn hood 12
The diameter for blocking the position of sounding body 2 is greater than or equal to 6mm.
In present embodiment, horn hood 12 is specially corresponding 1 solid section of earphone case in 21 center of voice coil, sounding body 2
Bounds reflection occurs at horn hood 12 for the low-frequency sound wave of generation, and then increases acoustic pressure, can be improved the low frequency of headphone unit
Amplitude improves the debugging space of noise reduction.
The diameter that horn hood 12 blocks the position of sounding body 2 is bigger, and bounds reflect more complete, the debugging space of noise reduction
Also bigger, which is arranged in 6mm or more, bounds reflection can be made completely, the debugging space of noise reduction is mentioned
It is raised to appropriateness.
Embodiment ten
Tenth embodiment of the invention provides a kind of earphone, and the tenth embodiment is in the first to the 9th embodiment
The further improvement of any one embodiment, mainly thes improvement is that, in the tenth embodiment of the invention, feeds back Mike
The resonance frequency of wind 3 is within the scope of 10KHz to 21KHz.
Feedback microphones 3 are preferably electric capacitor microphone.Electret condenser microphone is small in size, structure is simple,
Electroacoustic performance is good, is suitable for headphone unit, and its price is lower, reduces production cost.
Feedback microphones 3 select resonance frequency in 10KHz to the electric capacitor microphone of 21KHz range, compared to
MEMS microphone low frequency amplitude is high, and phase is negative value, is advantageously implemented higher low-frequency range noise reduction, and feed back wheat
The frequency response curve of gram wind 3 can be promoted due to resonance, be conducive to increase the effective bandwidth of noise reduction.Furthermore, it is understood that can also select
The frequency range of 10KHz to 20KHz.
In the prior art, in order to realize frequency response straight in working frequency range, often the resonance frequency of feedback microphones is arranged
Much higher than at 21KHz, the application selects feedback microphones of the resonance frequency within the scope of 10KHz to 21KHz, can be improved anti-
Present the rf amplitude of microphone.And then higher phase positive slope is obtained, overcome the technology prejudice of the prior art.
It will be understood by those skilled in the art that in above-mentioned each embodiment, in order to keep reader more preferably geographical
It solves the application and proposes many technical details.But even if without these technical details and based on the respective embodiments described above
Various changes and modifications can also realize each claim of the application technical solution claimed substantially.Therefore, in reality
In, can to above embodiment, various changes can be made in the form and details, without departing from spirit herein and model
It encloses.
Claims (10)
1. a kind of headphone unit, comprising:
Earphone case and setting are in the intracorporal sounding body of the ear casing；
It is characterized in that, the headphone unit further includes the feedback microphones being arranged on the earphone case, the feedback wheat
The circle wall of gram wind and the voice coil of the sounding body is oppositely arranged.
2. headphone unit according to claim 1, which is characterized in that the earphone case includes:
Ontology and the horn hood being arranged on the body；
The feedback microphones are located on the horn hood.
3. headphone unit according to claim 1, which is characterized in that the central axes of the feedback microphones and the voice coil
Axis parallel, and the extended line of the central axes of the feedback microphones pass through the voice coil circle wall.
4. headphone unit according to claim 2, which is characterized in that be provided with several beams, each item on the horn hood
Gap between fine strain of millet constitutes the sounding channel passed through for the sound of the sounding body；
The feedback microphones are arranged on the beam, and the beam close to the feedback microphones position be provided with it is several
A through-hole.
5. headphone unit according to claim 4, which is characterized in that the feedback microphones are located at the beam of two intersections
On intersection point.
6. headphone unit according to claim 2, which is characterized in that the horn hood blocks the position of the sounding body
Diameter is greater than or equal to 6mm.
7. headphone unit according to claim 2, which is characterized in that the headphone unit further includes covering in the horn hood
On flannelette.
8. headphone unit according to claim 2, which is characterized in that on the side wall of the horn hood backwards of the ontology
It is provided with the Helmholz resonance pipe being in communication with the outside.
9. headphone unit according to claim 1, which is characterized in that the resonance frequency of the feedback microphones is in 10KHz
To 21KHz.
10. a kind of earphone, which is characterized in that including headphone unit described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811043275.8A CN109151643A (en) | 2018-09-07 | 2018-09-07 | Earphone and headphone unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811043275.8A CN109151643A (en) | 2018-09-07 | 2018-09-07 | Earphone and headphone unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109151643A true CN109151643A (en) | 2019-01-04 |
Family
ID=64823839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811043275.8A Pending CN109151643A (en) | 2018-09-07 | 2018-09-07 | Earphone and headphone unit |
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| Country | Link |
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| CN (1) | CN109151643A (en) |
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| CN110099323A (en) * | 2019-05-23 | 2019-08-06 | 歌尔科技有限公司 | A kind of active noise reduction earphone |
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