CN211152190U - Half-in-ear active noise reduction earphone - Google Patents
Half-in-ear active noise reduction earphone Download PDFInfo
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- CN211152190U CN211152190U CN202020405068.9U CN202020405068U CN211152190U CN 211152190 U CN211152190 U CN 211152190U CN 202020405068 U CN202020405068 U CN 202020405068U CN 211152190 U CN211152190 U CN 211152190U
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Abstract
The utility model discloses a semi-in-ear active noise reduction earphone, wherein the earphone head is provided with a distal part which extends into the ear canal towards the tympanic membrane, and the distal part is provided with a front mouth hole; a loudspeaker module is arranged in the head of the earphone, a sound outlet pipe and an independent cavity are arranged in the front mouth hole, the independent cavity is isolated from the sound outlet pipe, an error microphone for receiving the sound of the auditory canal is arranged in the independent cavity, and a first sound receiving hole is formed in the independent cavity towards the cavity wall of the auditory canal; a first noise reduction circuit is arranged in the earphone head; the sound of the auditory canal comprises residual noise N which is transmitted into the auditory canal after the environment noise N is passively attenuated by the head of the earphonepAnd residual noise N transmitted into the auditory canal from the gap between the earphone and the auditory canalLThe first noise reduction circuit is based on NpAnd NLDriving horn mouldThe block generates a first noise reducing sound wave.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a half pleasant formula initiative noise reduction earphone.
Background
Active noise reduction is one of the methods applied to noise reduction of earphones, and noise is offset by sound waves with the phase opposite to that of external noise generated by a noise reduction system, so that the purpose of noise reduction is achieved.
At present, active noise reduction earphones on the market are mainly in-ear earphones and ear-wrapping earphones, a horn front cavity of the active noise reduction earphones can form a closed cavity with an ear canal when the active noise reduction earphones work, although noise reduction effect can be provided well, ear pressure is easily generated due to the fact that the active noise reduction earphones form the closed cavity with the ear canal, and wearing comfort of a user is affected. Because the front mouth hole of the semi-in-ear earphone is not completely closed, ear pressure cannot be generated during wearing, more comfortable wearing experience can be brought, and the problems of air leakage and incomplete cavity isolation caused by the incompletely closed ear canal also bring challenges to the application of the active noise reduction technology.
SUMMERY OF THE UTILITY MODEL
The utility model provides a method that half pleasant formula initiative noise reduction earphone microphone was arranged, the specific algorithm of cooperation solves the unsatisfactory problem of noise reduction effect of prior art in half pleasant noise reduction earphone under the pleasant formula scene.
In order to achieve the above object, the present invention provides the following technical solutions:
a semi-in-ear active noise reducing earphone comprising an earphone head having a distal portion extending into an ear canal toward a tympanic membrane, the distal portion defining a front mouth opening;
a loudspeaker module is arranged in the head of the earphone, a sound outlet pipe is arranged in the front nozzle hole, and the sound outlet pipe is communicated with the sound outlet end of the loudspeaker module inwards and communicated with the orifice of the front nozzle hole outwards;
an independent cavity is further arranged in the front mouth hole, the independent cavity is isolated from the sound outlet pipe, and an error microphone for receiving the sound of the ear canal is arranged in the independent cavity; the independent cavity is provided with a first sound receiving hole which is communicated inwards to the sound receiving end of the error microphone and outwards to the orifice of the front nozzle hole;
a first noise reduction circuit is arranged in the earphone head and electrically connected with the horn module and the error microphone;
the sound of the auditory canal comprises residual noise N transmitted into the auditory canal after external environment noise N is passively attenuated by the head of the earphonepAnd residual noise N transmitted into the auditory canal from the gap between the earphone and the auditory canalLWhat is, what isThe first noise reduction circuit is used for reducing the residual noise NpAnd NLAnd generating a noise reduction signal and driving the horn module to generate a first noise reduction sound wave.
Optionally, the first noise reduction circuit is further configured to perform constant amplitude compensation on a low frequency portion of the music signal attenuated by the first noise reduction sound wave.
Optionally, the sound outlet pipe includes a first sound outlet branch pipe and a second sound outlet branch pipe, and the first sound outlet branch pipe and the second sound outlet branch pipe are respectively disposed at two sides of the independent cavity.
Optionally, the orifice of the front mouth hole is provided with a tuning net, and the tuning net is provided with a avoiding hole aligned with the first acoustic hole.
Optionally, a special-shaped support is arranged in the earphone head, the special-shaped support and the horn module are arranged in an enclosing mode to form a horn front cavity, and the special-shaped support separates the horn front cavity from the independent cavity.
Optionally, the front nozzle hole is located at the periphery of the distal end portion; the first acoustic port is configured to: when the earphone is worn, the first acoustic hole faces the ear canal.
Optionally, the hole axis of the first acoustic hole is parallel to the central axis of the sound outlet pipe.
Optionally, the end face of the distal end portion is provided with a pressure relief hole.
Optionally, the earphone head further has a proximal portion extending outwardly towards the ear canal opening;
a feedforward microphone used for receiving external environment noise N is arranged in the near end part, a second sound receiving hole is formed in the near end part, and the second sound receiving hole is inwardly communicated with a sound receiving end of the feedforward microphone;
and a second noise reduction circuit used for driving the horn module 12 to generate a second noise reduction sound wave according to the external environment noise N is further arranged in the earphone head, and the second noise reduction circuit is electrically connected with the horn module and the feedforward microphone.
Optionally, the earphone device further comprises an earphone tail part, wherein the earphone tail part is connected to the tail end of the earphone head;
the earphone is characterized in that a call microphone is arranged in the tail of the earphone, a third sound receiving hole is formed in the tail end of the tail of the earphone, and the third sound receiving hole is communicated inwards to a sound receiving end of the call microphone.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a half-in-ear earphone of making an uproar falls in initiative sets up in earphone to the preceding mouth opening department of duct output sound through the error microphone that will have independent cavity for the complete residual noise N of receipt is tried to the ability to see through to the error microphoneLAnd judge the gas leakage situation that the earphone wore according to this, make first noise reduction circuit can select more suitable noise reduction parameter, realize more excellent noise reduction effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a semi-in-ear active noise reduction earphone provided by the present invention;
fig. 2 is a schematic structural diagram of a semi-in-ear active noise reduction earphone according to the present invention;
fig. 3 is a schematic cross-sectional view of a semi-in-ear active noise reduction earphone provided by the present invention;
fig. 4 is a noise reduction schematic diagram of a first noise reduction circuit in a semi-in-ear active noise reduction earphone provided by the present invention;
fig. 5 is a partial schematic view of a semi-in-ear active noise reduction earphone provided by the present invention;
fig. 6 is the utility model provides a pair of half-in-ear active noise reduction earphone in the second fall the schematic diagram of making an uproar.
In the above figures: 10. an earphone head; 101. a distal portion; 102. a proximal end portion; 11. a front nozzle hole; 111. a first sound outlet branch pipe; 112. a second sound outlet branch tube; 12. a horn module; 121. a horn front cavity; 13. an error microphone; 131. an error microphone circuit board; 132. a first acoustic hole; 14. a feedforward microphone; 141. a second acoustic hole; 15. a pressure relief vent; 16. a tuning net; 161. avoiding holes; 20. the tail of the earphone; 21. a third acoustic hole; 22. a special-shaped bracket.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides a semi-in-ear active noise reduction earphone, which includes an earphone head 10 and an earphone tail 20; wherein the earphone tail 20 is connected to the tail end of the earphone head 10.
Specifically, the earpiece head 10 has a distal portion 101 extending into the ear canal towards the tympanic membrane, and a proximal portion 102 extending outwardly towards the ear canal opening.
The earphone head 10 is internally provided with a horn module 12, the earphone head 10 is internally provided with a special-shaped support 22, and the special-shaped support 22 and the horn module 12 are enclosed to form a horn front cavity 121. Wherein, the distal part 101 is provided with a front mouth hole 11, the front mouth hole 11 is communicated with the ear canal, a sound outlet pipe is arranged in the front mouth hole 11, the sound outlet pipe is communicated with the front cavity 121 of the loudspeaker inwards and is communicated with the orifice of the front mouth hole 11 outwards; the sound waves emitted from the horn module 12 pass from the horn front chamber 121 through the sound outlet tube to the ear canal of the human ear.
Furthermore, an independent cavity is further arranged in the front nozzle hole 11, the independent cavity is isolated from the sound outlet pipe, and the special-shaped support 22 separates the horn front cavity 121 from the independent cavity, so that the independent cavity is isolated from the horn front cavity 121. Since the separate cavity is isolated from the horn front cavity 121, it can be ensured that the error microphone 13 does not directly receive the residual noise N generated by passive attenuation of the earphone head 10pAnd a music signal S from the speaker module 12.
An error microphone 13 for receiving the sound of the ear canal is arranged in the independent cavity, an error microphone circuit board 131 is connected to the error microphone 13, the error microphone circuit board 131 is located on one side of the error microphone 13 close to the orifice of the front mouth hole 11, and a first sound receiving hole 132 is formed in the error microphone circuit board 131. The first sound receiving hole 132 is inwardly communicated with the sound receiving end of the error microphone 13 and outwardly communicated with the orifice of the front nozzle hole 11; further, the sound outlet pipe includes a first sound outlet branch pipe 111 and a second sound outlet branch pipe 112, and the first sound outlet branch pipe 111 and the second sound outlet branch pipe 112 are separately provided on both sides of the independent chamber.
When the earphone is worn, the error microphone 13 extends into the auditory canal, and the isolation function of the independent cavity enables the error microphone 13 to completely collect the residual noise N in the auditory canal as much as possibleLProviding a basis for evaluating the air leakage condition of the earphone; and can more completely collect the residual noise N in the auditory canalpAnd NLOf mixed sound, of earphonesThe active noise reduction provides basis.
In particular, the ear canal sound comprises residual noise N transmitted into the ear canal after passive attenuation by the earpiece headpResidual noise N transmitted into the auditory canal through the gap between the earphone and the auditory canalLAnd reflected musical sound S in the auditory canalL. The first noise reduction circuit is electrically connected with the horn module 12 and the error microphone 13 for reducing the residual noise NpAnd NLGenerates a noise reduction signal and drives the speaker module 12 to generate a first noise reduction sound wave, and is also used for performing constant amplitude compensation on the low frequency part of the music signal attenuated by the first noise reduction sound wave.
Referring to fig. 4, the noise reduction principle of the first noise reduction circuit is as follows: residual noise N is collected by error microphone 13pAnd NLThe mixed sound generates a noise reduction signal and then outputs the noise reduction signal to drive the horn module 12 to generate a first noise reduction sound wave with the same amplitude and opposite phase with the mixed sound, thereby realizing the effect of active noise reduction.
Meanwhile, the first noise reduction circuit also performs constant amplitude compensation on the low-frequency part of the music signal attenuated by the first noise reduction sound wave, so that the music signal can be completely restored, and the phenomenon that the low frequency of the played music is seriously lost is avoided while the active noise reduction function on the low-frequency noise is ensured.
Further, the front mouth hole 11 is located at the periphery of the distal end portion 101, and the orifice of the first acoustic hole 132 is configured to be disposed toward the ear canal; in addition, the hole axis of the first acoustic hole 132 is parallel to the central axis of the sound outlet pipe. This arrangement shortens the path of the noise detected by the error microphone 13 and shortens the residual noise N transmitted from the gap into the ear canalLThe time error transmitted to the error microphone 13 also ensures the residual noise NLThe signal integrity of the noise reduction circuit is improved.
The error microphone 13 is configured to be as close as possible to the aperture of the front nozzle hole 11 to the residual noise N of the human ear as close as possiblepAnd NLThe hearing sense of the mixed sound is reduced as much as possible, so that the error of the error microphone 13 and the human ear for the pickup of the mixed sound participating in the noise is reduced, and the error microphone 13 can be leaked to the wearing of the earphoneThe error between the evaluation and the actual leakage is minimized and the noise reduction effect can be further optimized.
Referring to fig. 5, in the present embodiment, the tuning net 16 is disposed at the opening of the front nozzle hole 11, the tuning net 16 is disposed with an avoiding hole 161 aligned with the first sound receiving hole 132, and the avoiding hole 161 can avoid the tuning net 16 blocking the error microphone 13, so as to avoid the noise collection intensity from being affected by the error microphone 13 due to the blocking of the tuning net 16.
In addition, the end face of the distal end part 101 is provided with a pressure relief hole 15, and the pressure relief hole 15 can balance the pressure inside and outside the ear, so that more perfect sound quality and sound effect are brought; meanwhile, the self-adaptive and self-convergent noise reduction effect can be achieved through the active noise reduction mode, and therefore better noise reduction experience is brought to users.
Referring to fig. 2 and 3 again, according to the above embodiment, the earphone head 10 further has a proximal portion 102 extending outward toward the ear canal opening, and a feed-forward microphone 14 is disposed in the proximal portion 102; the proximal portion 102 defines a second acoustic hole 141, and the second acoustic hole 141 is disposed to communicate with the acoustic end of the feedforward microphone 14. When the earphone is worn, the feedforward microphone 14 is exposed outside the concha and is thus used to receive the external environment noise N (20Hz to 20 KHz).
The headphone head 10 is further provided with a second noise reduction circuit for driving the speaker module 12 to generate a second noise reduction sound wave according to the external environment noise N, and the second noise reduction circuit is electrically connected to the speaker module 12 and the feedforward microphone 14.
Referring to fig. 6, the noise reduction principle of the second noise reduction circuit is as follows:
the feedforward microphone 14 collects the external environment noise N of the full frequency of the external environment, and the noise reduction signal is generated by the second noise reduction circuit to drive the horn module 12 to generate a second noise reduction sound wave with the same amplitude and opposite phase with the external environment noise N, so as to actively reduce the noise of the external noise.
Based on the above embodiments, in this embodiment, the semi-in-ear active noise reduction earphone further includes an earphone tail 20, where the earphone tail 20 is connected to the tail end of the earphone head 10; a talking microphone is arranged in the earphone tail 20, a third sound-receiving hole 21 is formed at the tail end of the earphone tail 20, and the third sound-receiving hole 21 is communicated with the sound-receiving end of the talking microphone inwards. The voice call function of the earphone can be realized through the call microphone.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A semi-in-ear active noise reducing earphone comprising an earphone head having a distal portion extending into an ear canal toward a tympanic membrane, the distal portion defining a front mouth opening;
a loudspeaker module is arranged in the head of the earphone, a sound outlet pipe is arranged in the front nozzle hole, and the sound outlet pipe is communicated with the sound outlet end of the loudspeaker module inwards and communicated with the orifice of the front nozzle hole outwards;
an independent cavity is further arranged in the front mouth hole, the independent cavity is isolated from the sound outlet pipe, and an error microphone for receiving the sound of the ear canal is arranged in the independent cavity; the independent cavity is provided with a first sound receiving hole, and the first sound receiving hole is communicated inwards to the sound receiving end of the error microphone and outwards communicated to the independent cavity to form an opening to the auditory canal;
a first noise reduction circuit is arranged in the earphone head and electrically connected with the horn module and the error microphone;
the sound of the auditory canal comprises residual noise N transmitted into the auditory canal after external environment noise N is passively attenuated by the head of the earphonepAnd residual noise N transmitted into the auditory canal from the gap between the earphone and the auditory canalLThe first noise reduction circuit is used for reducing the residual noise N according to the residual noisepAnd NLAnd generating a noise reduction signal and driving the horn module to generate a first noise reduction sound wave.
2. The semi-in-ear active noise reducing headphone of claim 1, wherein the first noise reduction circuit is further configured to equalize low frequency portions of the music signal attenuated by the first noise reducing sound wave.
3. The semi-in-ear active noise reducing earphone according to claim 1, wherein the sound outlet tube comprises a first sound outlet branch tube and a second sound outlet branch tube, and the first sound outlet branch tube and the second sound outlet branch tube are respectively disposed at two sides of the independent cavity.
4. The semi-in-ear active noise reduction earphone according to claim 1, wherein the orifice of the front mouth hole is provided with a tuning net, and the tuning net is provided with a avoiding hole aligned with the first acoustic hole.
5. The semi-in-ear active noise reduction earphone according to claim 1, wherein a shaped support is disposed in the earphone head, the shaped support and the speaker module are enclosed to form a speaker front cavity, and the shaped support separates the speaker front cavity and the independent cavity.
6. The semi-in-ear active noise reducing earphone according to claim 1 wherein the front mouth opening is located at the periphery of the distal end portion, the first acoustic opening configured to: when the earphone is worn, the first acoustic hole faces the ear canal.
7. The semi-in-ear active noise reducing earphone according to claim 1, wherein the hole axis of the first acoustic hole is parallel to the central axis of the sound outlet tube.
8. The semi-in-ear active noise reducing earphone according to claim 1, wherein the end face of the distal portion is provided with a pressure relief hole.
9. The semi-in-ear active noise reducing earphone according to claim 1 wherein the earphone head further has a proximal portion extending outwardly toward the ear canal opening;
a feedforward microphone used for receiving external environment noise N is arranged in the near end part, a second sound receiving hole is formed in the near end part, and the second sound receiving hole is inwardly communicated with a sound receiving end of the feedforward microphone;
and a second noise reduction circuit used for generating a noise reduction signal according to the external environment noise N and driving the loudspeaker module to generate a second noise reduction sound wave is further arranged in the earphone head, and the second noise reduction circuit is connected with the loudspeaker module and the feedforward microphone.
10. The semi-in-ear active noise reducing headphone of claim 1, further comprising a headphone tail connected to a tail end of the headphone head;
the earphone is characterized in that a call microphone is arranged in the tail of the earphone, a third sound receiving hole is formed in the tail end of the tail of the earphone, and the third sound receiving hole is communicated inwards to a sound receiving end of the call microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020405068.9U CN211152190U (en) | 2020-03-26 | 2020-03-26 | Half-in-ear active noise reduction earphone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020405068.9U CN211152190U (en) | 2020-03-26 | 2020-03-26 | Half-in-ear active noise reduction earphone |
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| CN211152190U true CN211152190U (en) | 2020-07-31 |
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| CN202020405068.9U Active CN211152190U (en) | 2020-03-26 | 2020-03-26 | Half-in-ear active noise reduction earphone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022047905A1 (en) * | 2020-09-01 | 2022-03-10 | 苏州中科速衡电子有限公司 | Active noise reduction module of acoustoelectric sensor and sound monitor |
| CN114697791A (en) * | 2020-12-30 | 2022-07-01 | 华为技术有限公司 | Earphone set |
| CN114845193A (en) * | 2021-02-02 | 2022-08-02 | 深圳市三诺数字科技有限公司 | Earphone and electronic equipment with same |
-
2020
- 2020-03-26 CN CN202020405068.9U patent/CN211152190U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022047905A1 (en) * | 2020-09-01 | 2022-03-10 | 苏州中科速衡电子有限公司 | Active noise reduction module of acoustoelectric sensor and sound monitor |
| CN114697791A (en) * | 2020-12-30 | 2022-07-01 | 华为技术有限公司 | Earphone set |
| WO2022143234A1 (en) * | 2020-12-30 | 2022-07-07 | 华为技术有限公司 | Earphone |
| CN115119094A (en) * | 2020-12-30 | 2022-09-27 | 华为技术有限公司 | Earphone set |
| EP4247001A4 (en) * | 2020-12-30 | 2024-05-22 | Huawei Technologies Co., Ltd. | Earphone |
| CN114845193A (en) * | 2021-02-02 | 2022-08-02 | 深圳市三诺数字科技有限公司 | Earphone and electronic equipment with same |
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