CN113840202B - Noise reduction earphone - Google Patents
Noise reduction earphone Download PDFInfo
- Publication number
- CN113840202B CN113840202B CN202111113734.7A CN202111113734A CN113840202B CN 113840202 B CN113840202 B CN 113840202B CN 202111113734 A CN202111113734 A CN 202111113734A CN 113840202 B CN113840202 B CN 113840202B
- Authority
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- China
- Prior art keywords
- guide channel
- sound guide
- earphone
- horn
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007613 environmental effect Effects 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 13
- 208000009205 Tinnitus Diseases 0.000 description 9
- 238000001914 filtration Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 210000000613 ear canal Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H04R1/1016—Earpieces of the intra-aural type
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
-
- 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
Abstract
The invention provides a noise reduction earphone, which relates to the technical field of earphones, and comprises an earphone body, an ambient sound guide channel and a valve; the environmental sound guide channel is positioned in the earphone body, the first end part of the environmental sound guide channel is communicated with the outside, and the second end part of the environmental sound guide channel is communicated with the auditory canal; the valve is arranged in the environmental sound guide channel and used for controlling the conduction state of the environmental sound guide channel. The noise reduction earphone provided by the invention can be easily switched between the full in-ear type and the half in-ear type, the earphone does not need to be refitted and disassembled in the operation process, the requirements of different people in different environments are met, the wearing is more comfortable, and the adaptability is stronger.
Description
Technical Field
The invention relates to the technical field of earphones, in particular to a noise reduction earphone.
Background
The existing in-ear noise reduction earphone is divided into a fully sealed in-ear noise reduction earphone and a semi-open in-ear noise reduction earphone. The fully sealed in-ear noise reduction earphone has excellent and stable noise reduction performance due to the fact that the earplug is fully attached and sealed with the human auditory canal, but the fully sealed in-ear noise reduction earphone completely isolates the human ear from the outside, and discomfort and oppression on the auditory sense can be caused; the in-ear part of the semi-open in-ear noise reduction earphone has acoustic leakage, so that the in-ear part is comfortable and natural to wear, but the noise reduction performance is reduced to some extent, and different physiological structures of each ear have different leakage states, so that the noise reduction effect is different from person to person, and the noise reduction performance cannot be reflected stably.
Therefore, how to provide a noise reduction earphone capable of switching between the full in-ear mode and the half in-ear mode is one of the technical problems to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a noise reduction earphone which can be easily switched between a full-in-ear type and a half-in-ear type, does not need to be refitted and disassembled in the operation process, is suitable for the requirements of different people and different environments, and is more comfortable to wear and higher in adaptability.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a noise reduction earphone which comprises an earphone body, an ambient sound guide channel and a valve, wherein the earphone body is provided with a sound guide channel; the environmental sound guide channel is positioned in the earphone body, the first end part of the environmental sound guide channel is communicated with the outside, and the second end part of the environmental sound guide channel is communicated with the auditory canal; the valve is configured in the environmental sound guide channel and is used for controlling the conduction state of the environmental sound guide channel.
Further, the earphone body is provided with a speaker front cavity and a speaker rear cavity which are independent of each other, the speaker front cavity is used for being communicated with an auditory canal, a first end part of the environmental sound guide channel penetrates through the speaker rear cavity to be communicated with the outside, and a second end part of the environmental sound guide channel is communicated with the speaker front cavity.
Further, the earphone body includes an acoustic assembly, an inner tube, and an earplug cap;
the acoustic assembly has the horn front cavity and the horn rear cavity;
the inner tube is configured in the acoustic assembly, the inner tube forms the environmental sound guide channel, or the environmental sound guide channel is formed between the inner tube and the acoustic assembly;
the earplug cap is connected with the acoustic assembly, and the earplug cap is in communication with the horn front cavity.
Further, the acoustic assembly includes a housing, a speaker, an error microphone, and a reference microphone;
the horn is positioned in the shell, and the two sides of the horn are respectively the front horn cavity and the rear horn cavity;
the error microphone is configured in the front cavity of the loudspeaker, and the reference microphone is configured in the rear cavity of the loudspeaker;
the inner tube is arranged in the shell;
the earplug cap is connected with the shell.
Further, the environmental sound guide channel is in a linear extension, a fold line extension or a curve extension.
Further, the valve is located in the middle of the ambient sound guide channel.
Further, the valve is an electric control valve.
Further, an earphone active noise reduction processing module is configured in the earphone body, the earphone active noise reduction processing module comprises a first controller electrically connected with the valve, and the first controller is used for controlling the opening and closing of the valve and switching different noise reduction filtering parameters according to the opening and closing of the valve.
Further, an earphone active noise reduction processing module is configured in the earphone body, and the earphone active noise reduction processing module comprises a second controller, a sealed filter bank and an open filter bank;
the second controller is connected with the valve, the sealed filter bank and the open filter bank, and is used for controlling the opening and closing of the valve and controlling one of the sealed filter bank and the open filter bank to be in a working state according to the opening and closing of the valve.
Further, the sealed filter bank comprises a sealed feedforward filter and a sealed feedback filter, both of which are connected with the second controller;
the open filter bank includes a semi-open feedforward filter and a semi-open feedback filter, both of which are connected to the second controller.
The noise reduction earphone provided by the invention has the following beneficial effects:
when the valve is closed, the environmental sound guide channel is in a closed state, the human ear is completely isolated from the outside, and the earphone is a completely sealed in-ear noise-reducing earphone, so that the noise-reducing earphone has excellent noise-reducing performance; when the valve is opened, the ambient sound guide channel is in a conducting state, external sound can enter the human ear through the ambient sound guide channel, and the earphone is a semi-open ear-in noise-reducing earphone, so that discomfort of the sealed ear-in earphone and pressing sense after noise reduction can be eliminated.
Compared with the prior art, the noise reduction earphone provided by the invention can be easily switched between the full in-ear type and the half in-ear type, the earphone does not need to be refitted and detached in the operation process, the requirements of different people in different environments are met, the wearing is more comfortable, and the adaptability is stronger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a noise reduction earphone according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of an active noise reduction processing module of an earphone according to an embodiment of the present invention.
Icon: 1-an earphone body; 11-an acoustic assembly; 111-horn front cavity; 112-horn rear cavity; 113-a housing; 114-horn; 115-error microphone; 116-a reference microphone; 12-an inner tube; 121-an ambient sound guide channel; 13-earbud cap; 2-valve; 3-sealed feedforward filter; a 4-seal feedback filter; a 5-semi-open feedforward filter; 6-semi-open feedback filter.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of a noise reduction earphone according to an embodiment of the present invention; fig. 2 is a schematic block diagram of an active noise reduction processing module of an earphone according to an embodiment of the present invention.
The present embodiment is to provide a noise reduction earphone, as shown in fig. 1, including an earphone body 1, an ambient sound guide channel 121 and a valve 2; the environmental sound guide channel 121 is located in the earphone body 1, and a first end portion thereof is communicated with the outside, and a second end portion thereof is used for communicating with the auditory canal; the valve 2 is disposed in the environmental sound guide channel 121 for controlling the conducting state of the environmental sound guide channel 121.
The noise reduction earphone provided by the embodiment can be switched between the full-in-ear type and the half-in-ear type through the switch of the control valve 2, the operation is simple, the appearance structure of the noise reduction earphone does not need to be changed, and the practicability is high.
It should be noted that the position and the extension path of the environmental sound guiding channel 121 may not be specifically limited, and the purpose of the environmental sound guiding channel 121 is to add a channel in the noise reduction earphone, so that after the noise reduction earphone is worn, the on-off between the ear canal and the outside can be realized through the valve 2 in the channel.
The earphone body 1 has a speaker front cavity 111 and a speaker rear cavity 112 independent of each other, the speaker front cavity 111 being for communication with the ear canal.
In some embodiments, as shown in fig. 1, a first end of the ambient sound guide channel 121 communicates with the outside through the horn rear chamber 112, and a second end of the ambient sound guide channel 121 communicates with the horn front chamber 111.
In the above embodiment, the communication between the front speaker chamber 111 and the outside is realized by the environmental sound guide channel 121, and the opening at the first end of the environmental sound guide channel 121 may be formed at the earphone housing of the rear speaker chamber 112, so as to avoid the skin from blocking the opening at the first end when the user wears the noise reduction earphone, and ensure that air can circulate smoothly in the environmental sound guide channel 121.
The environmental sound guide channel 121 may be linear, polygonal, or curved, or a combination of the three. That is, the extension shape of the ambient sound guide passage 121 may be changed appropriately according to the internal structure of the noise reduction earphone, and is not limited to a certain shape or shapes.
In some embodiments, as shown in fig. 1, the earphone body 1 includes an acoustic assembly 11, an inner tube 12 and an earplug cap 13, the acoustic assembly 11 has a horn front cavity 111 and a horn rear cavity 112 independent from each other, the inner tube 12 is disposed in the acoustic assembly 11, the earplug cap 13 is connected to the acoustic assembly 11, and the earplug cap 13 communicates with the horn front cavity 111 to guide sound in the horn front cavity 111 to the ear canal.
The inner tube 12 may have the following two arrangements:
mode one
The inner tube 12 itself forms an environmental sound guide channel 121, that is, the inner tube 12 may be a tube body in the shape of a round tube, a square tube, or the like, one end of which is connected to the earphone housing of the speaker rear cavity 112 and communicates with the outside, and the other end of which is located in the speaker front cavity 111.
In the above manner, the inner tube 12 can be independently processed and then installed in the acoustic assembly 11, so that the inner tube 12 can be conveniently assembled.
Mode two
An environmental sound guiding channel 121 is formed between the inner tube 12 and the acoustic assembly 11, that is, the inner tube 12 may adopt a half-tube structure and be connected with the inner wall of the acoustic assembly 11, the environmental sound guiding channel 121 is formed between the inner wall of the inner tube 12 and the inner wall of the acoustic assembly 11, one end of the environmental sound guiding channel 121 is connected with the earphone shell of the speaker rear cavity 112 to form an opening communicated with the outside, and the other end of the environmental sound guiding channel is located in the speaker front cavity 111.
In the second mode, the environmental sound guide channel 121 is formed between the inner tube 12 and the acoustic assembly 11, so that the contact area between the inner tube 12 and other structures in the acoustic assembly 11 can be reduced, and the sealing process between the outer wall of the inner tube 12 and other structures in the acoustic assembly 11 can be facilitated.
In the second embodiment, the inner tube 12 and the housing 113 of the acoustic assembly 11 may be processed independently, and the inner tube 12 may be assembled into the housing 113 of the acoustic assembly 11 after the processing. The two may also adopt an integral structure, that is, the environmental sound guide channel 121 is directly formed in the housing 113 when the housing 113 is opened.
In some embodiments, as shown in fig. 1, the acoustic assembly 11 includes a housing 113, a speaker 114, an error microphone 115, and a reference microphone 116; the horn 114 is located in the shell 113, and two sides of the horn 114 are respectively provided with a horn front cavity 111 and a horn rear cavity 112; error microphone 115 is disposed in horn front chamber 111 and reference microphone 116 is disposed in horn rear chamber 112; the inner tube 12 is configured in the shell 113, one end of the inner tube 12 is connected with the shell 113 of the horn back cavity 112, and the other end of the inner tube 12 extends into the horn front cavity 111; the earbud cap 13 is connected to the housing 113.
In some embodiments, the valve 2 is located in the middle of the ambient sound guide channel 121, i.e. the valve 2 is mounted in the middle of the inner tube 12. For control of the valve 2, the valve 2 may be an electrically controlled valve 2.
In some embodiments, to ensure good sound quality, an active noise reduction processing module of the earphone is configured in the earphone body 1.
According to the different structures of the active noise reduction processing modules of the earphone, the following two embodiments can be divided:
example 1
In the first embodiment, the noise reduction earphone adopts a digital noise reduction earphone, the earphone active noise reduction processing module comprises a first controller electrically connected with the valve 2, the first controller is used for controlling the opening and closing of the valve 2, and the first controller is also used for switching different noise reduction filtering parameters according to the opening and closing states of the valve 2 as the opening and closing states of the valve 2 correspond to different noise reduction filtering parameters.
When the valve 2 is opened, the noise reduction earphone is a half-open in-ear noise reduction earphone, the first controller is switched to the first noise reduction filtering parameter, and signals of the reference microphone 116 and the error microphone 115 are processed and output to the loudspeaker 114; when the valve 2 is closed, the noise reduction earphone is a completely sealed in-ear noise reduction earphone, and the first controller switches to the second noise reduction filter parameter to process signals of the reference microphone 116 and the error microphone 115 and output the processed signals to the loudspeaker 114. The above manner can enable the noise reduction earphone to perform noise reduction treatment in a targeted manner according to the open state of the environmental sound guide channel 121, so as to ensure good use effect.
Example two
In the second embodiment, the noise reduction earphone adopts an analog noise reduction earphone, and the earphone active noise reduction processing module comprises a second controller, a sealed filter bank and an open filter bank, wherein the second controller is connected with the valve 2, the sealed filter bank and the open filter bank, and is used for controlling the opening and closing of the valve 2 and controlling one of the sealed filter bank and the open filter bank to be in a working state according to the opening and closing of the valve 2.
Specifically, the sealed filter bank includes a sealed feedforward filter 3 and a sealed feedback filter 4, both connected to the second controller; the open filter bank comprises a semi-open feedforward filter 5 and a semi-open feedback filter 6, both connected to the second controller.
When the valve 2 is closed, the second controller controls the sealed feedforward filter 3 and the sealed feedback filter 4 to work, as shown in fig. 2, the sealed feedforward filter 3 processes the reference microphone 116 signal, the sealed feedback filter 4 processes the error microphone 115 signal, and the processed signal is output to the loudspeaker 114; when the valve 2 is opened, the second controller controls the semi-open feedforward filter 5 and the semi-open feedback filter 6 to operate, processes signals of the reference microphone 116 and the error microphone 115, respectively, and outputs the processed signals to the horn 114.
In summary, the noise reduction earphone provided by the above embodiment has the following advantages:
1. the noise reduction earphone can be switched between the full-in-ear type and the half-in-ear type by controlling the switch of the valve 2, the earphone does not need to be refitted and disassembled in the operation process, the requirements of different people in different environments are met, the wearing is more comfortable, and the adaptability is stronger;
2. the valve 2 can be an electrically controlled valve, which is convenient for the user to operate.
3. The earphone active noise reduction processing module can switch noise reduction filtering parameters according to the opening and closing of the valve 2, so that good sound effect is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. The noise reduction earphone is characterized by comprising an earphone body (1), an ambient sound guide channel (121) and a valve (2); the environmental sound guide channel (121) is positioned in the earphone body (1), a first end part of the environmental sound guide channel is communicated with the outside, and a second end part of the environmental sound guide channel is communicated with the auditory canal; the valve (2) is configured in the environmental sound guide channel (121) and is used for controlling the conduction state of the environmental sound guide channel (121);
the earphone body (1) comprises an acoustic assembly (11), an inner tube (12) and an earplug cap (13);
the acoustic assembly (11) is provided with a horn front cavity (111) and a horn rear cavity (112) which are independent from each other, the horn front cavity (111) is used for being communicated with an auditory canal, a first end part of the environment sound guide channel (121) passes through the horn rear cavity (112) to be communicated with the outside, and a second end part of the environment sound guide channel (121) is communicated with the horn front cavity (111);
-the inner tube (12) forms the ambient sound guide channel (121), or-the ambient sound guide channel (121) is formed between the inner tube (12) and the acoustic assembly (11);
the earplug cap (13) is communicated with the horn front cavity (111);
the acoustic assembly (11) comprises a housing (113), a loudspeaker (114), an error microphone (115) and a reference microphone (116);
the horn (114) is positioned in the shell (113), and the two sides of the horn (114) are respectively the horn front cavity (111) and the horn rear cavity (112);
the error microphone (115) is arranged in the front horn cavity (111), and the reference microphone (116) is arranged in the rear horn cavity (112);
the inner tube (12) is disposed in the housing (113);
the earplug cap (13) is connected with the shell (113);
an earphone active noise reduction processing module is arranged in the earphone body (1), and comprises a second controller, a sealed filter bank and an open filter bank; the second controller is connected with the valve (2), the sealed filter bank and the open filter bank;
the sealed filter bank comprises a sealed feedforward filter (3) and a sealed feedback filter (4) which are both connected with the second controller; the open filter bank comprises a semi-open feedforward filter (5) and a semi-open feedback filter (6) which are both connected with the second controller;
when the valve (2) is closed, the second controller controls the sealed feedforward filter (3) and the sealed feedback filter (4) to work, the sealed feedforward filter (3) processes a reference microphone (116) signal in the earphone body (1), and the sealed feedback filter (4) processes an error microphone (115) signal in the earphone body (1); when the valve (2) is opened, the second controller controls the semi-open feedforward filter (5) and the semi-open feedback filter (6) to work, the semi-open feedforward filter (5) processes the signal of the reference microphone (116), and the semi-open feedback filter (6) processes the signal of the error microphone (115).
2. Noise reducing earphone according to claim 1, characterized in that the ambient sound guide channel (121) is of a rectilinear extension, a zigzag extension or a curvilinear extension.
3. Noise reducing earphone according to claim 1, characterized in that the valve (2) is located in the middle of the ambient sound guide channel (121).
4. A noise reducing earphone according to any of claims 1-3, characterized in that the valve (2) is an electrically controlled valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113734.7A CN113840202B (en) | 2021-09-23 | 2021-09-23 | Noise reduction earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113734.7A CN113840202B (en) | 2021-09-23 | 2021-09-23 | Noise reduction earphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113840202A CN113840202A (en) | 2021-12-24 |
| CN113840202B true CN113840202B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111113734.7A Active CN113840202B (en) | 2021-09-23 | 2021-09-23 | Noise reduction earphone |
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| Country | Link |
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| CN (1) | CN113840202B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982400A (en) * | 2016-01-19 | 2017-07-25 | 苹果公司 | In-Ear loudspeaker mixed audio transparent system |
| CN111818415A (en) * | 2019-04-12 | 2020-10-23 | 聚睿电子股份有限公司 | Active noise reduction earphone and method thereof |
| CN111885460A (en) * | 2020-07-29 | 2020-11-03 | 歌尔科技有限公司 | Transparent mode adjusting device and method of wireless earphone and wireless earphone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9131311B2 (en) * | 2010-10-07 | 2015-09-08 | Polk Audio, Llc | Canal phones with structure and method for selectively passing or blocking environmental ambient sound and switchable electrical connections |
-
2021
- 2021-09-23 CN CN202111113734.7A patent/CN113840202B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982400A (en) * | 2016-01-19 | 2017-07-25 | 苹果公司 | In-Ear loudspeaker mixed audio transparent system |
| CN110545500A (en) * | 2016-01-19 | 2019-12-06 | 苹果公司 | Mixed audio transparent system of in-ear speaker |
| CN111818415A (en) * | 2019-04-12 | 2020-10-23 | 聚睿电子股份有限公司 | Active noise reduction earphone and method thereof |
| CN111885460A (en) * | 2020-07-29 | 2020-11-03 | 歌尔科技有限公司 | Transparent mode adjusting device and method of wireless earphone and wireless earphone |
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| CN113840202A (en) | 2021-12-24 |
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