Noise reduction processing method for earphones, earphones and computer-readable storage medium

Abstract

The present invention discloses a noise reduction processing method for an earphone, comprising: obtaining a mixed audio signal collected by a feedforward microphone; processing the mixed audio signal according to a preset first transfer function to obtain a first audio signal, where the first transfer function represents the relationship between the audio signal detected by the feedback microphone and the audio signal detected by the feedforward microphone when the feedforward microphone and the feedback microphone are installed; performing filtering processing on the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal; controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the environmental noise and the noise in the front cavity. The present invention also proposes an earphone and a computer-readable storage medium. The present invention realizes feedforward noise reduction and feedback noise reduction, reduces the use of microphones, and lowers the cost.

Description

Technical Field

[0001] The present invention relates to the field of earphones, and in particular, to a noise reduction processing method for earphones, an earphone, and a computer-readable storage medium. Background Art

[0002] When a user uses an earphone, environmental noise generally affects the user's earphone usage effect. To reduce the impact of environmental noise on earphone usage, generally, a feedforward microphone is used to detect environmental noise for feedforward noise reduction, that is, to control the speaker in the earphone to output a noise suppression signal that is out of phase with the environmental noise to cancel the noise in the environment; the environmental noise is detected through a feedforward microphone provided on the earphone housing. Since the earphone is located in the ear canal, the noise at the front end of the earphone has the greatest impact on the user. To reduce the front-end noise, a microphone is often provided in the front cavity to perform feedback noise reduction on the front cavity noise.

[0003] However, this solution requires microphones to be provided in both the front cavity and the rear cavity, resulting in a high cost. Summary of the Invention

[0004] The main purpose of the present invention is to provide a noise reduction processing method for earphones, an earphone, and a computer-readable storage medium, aiming to achieve feedforward noise reduction and feedback noise reduction only through a feedforward microphone to reduce costs.

[0005] To achieve the above object, the present invention provides an earphone, the earphone includes:

[0006] A front cavity;

[0007] A rear cavity, a sound leakage hole communicating the front cavity and the rear cavity is provided on the partition between the front cavity and the rear cavity;

[0008] A speaker, the speaker is provided on the partition, and the sound output surface of the speaker is located in the front cavity;

[0009] A feedforward microphone, the feedforward microphone is fixed in the rear cavity through a fixing member, a first opening for detecting external noise is provided in the rear cavity, and a second opening communicating the feedforward microphone and the rear cavity is provided on the fixing member.

[0010] Optionally, a receiving groove with one end open is provided in the rear cavity, the feedforward microphone is located in the receiving groove, and the first opening is provided at the bottom of the receiving groove; a rubber sleeve is provided in the receiving groove, and a sound guiding groove is provided on the rubber sleeve; the fixing member is provided at the opening of the receiving groove.

[0011] To achieve the above object, the present invention provides a noise reduction processing method for earphones, which is applied to an earphone, and the earphone is the above-mentioned earphone. The noise reduction processing method for the earphone includes:

[0012] Obtain the mixed audio signal collected by the feedforward microphone;

[0013] Process the mixed audio signal according to a preset first transfer function to obtain a first audio signal, where the first transfer function characterizes the relationship between the audio signal detected by the feedback microphone and the audio signal detected by the feedforward microphone when the feedforward microphone and the feedback microphone are installed;

[0014] Filter the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal;

[0015] Control the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the ambient noise and the noise in the front cavity.

[0016] Optionally, the step of filtering the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal includes:

[0017] Process the speaker audio signal according to a preset second transfer function to obtain a third audio signal, where the second transfer function characterizes the relationship between the audio signal output by the speaker detected by the feedforward microphone and the speaker audio signal input by the speaker;

[0018] Filter the third audio signal in the mixed audio signal to obtain the second audio signal.

[0019] Optionally, the step of filtering the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal includes:

[0020] Analyze the speaker audio signal using an adaptive filter to determine a target reference signal corresponding to the minimum error signal of the adaptive filter;

[0021] Filter the target reference signal in the mixed audio signal to obtain the second audio signal.

[0022] Optionally, the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the ambient noise and the noise in the front cavity includes:

[0023] Obtain a first inverted signal of the first audio signal and a second inverted signal of the second audio signal;

[0024] Control the speaker to output the first inverted signal and the second inverted signal to cancel the ambient noise and the noise in the front cavity.

[0025] Optionally, the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the environmental noise and the noise in the front cavity includes:

[0026] Superimpose the first audio signal and the second audio signal to generate a superimposed audio signal;

[0027] Control the speaker to output a third anti-phase signal corresponding to the superimposed audio signal to cancel the environmental noise and the noise in the front cavity.

[0028] Optionally, the speaker audio signal includes the noise suppression signal and the playback audio signal.

[0029] Optionally, after the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal, the method further includes:

[0030] Update the noise suppression signal in the speaker audio signal with the currently output noise suppression signal.

[0031] In addition, to achieve the above object, the present invention further provides a headset, which includes a memory, a processor, and a noise reduction processing program of the headset stored on the memory and executable on the processor. The microphone and the speaker are connected to the processor, and the noise reduction processing program of the headset is executed by the processor to perform the noise reduction processing method of the headset as described above.

[0032] In addition, to achieve the above object, the present invention further provides a computer-readable storage medium, on which a noise reduction processing program of the headset is stored. When the noise reduction processing program of the headset is executed by a processor, the steps of the noise reduction processing method of the headset as described above are implemented.

[0033] The noise reduction processing method, headset, and computer-readable storage medium of the headset proposed by the present invention detect a mixed noise signal by a feedforward microphone located in the rear cavity, obtain a feedback noise signal according to a first transfer function, and at the same time filter a mitigation audio signal according to the speaker audio signal to obtain a feedforward noise signal. By controlling the speaker to output a corresponding noise suppression signal according to the feedback noise signal and the feedforward noise signal, feedforward noise reduction and feedback noise reduction can be achieved, reducing the use of microphones and lowering costs. Description of the Drawings

[0034] Figure 1 It is a schematic cross-sectional structure diagram of the headset related to the present invention;

[0035] Figure 2 It is a flat view of the headset of the present invention when the rubber sleeve is not sleeved on the microphone;

[0036] Figure 3 Schematic diagram of the hardware architecture of the earphone related to the noise reduction processing method of the earphone of the present invention;

[0037] Figure 4 Schematic flow chart of the first exemplary embodiment of the noise reduction processing method of the earphone of the present invention;

[0038] Figure 5 Schematic flow chart of the second exemplary embodiment of the noise reduction processing method of the earphone of the present invention;

[0039] Figure 6 Schematic flow chart of the third exemplary embodiment of the noise reduction processing method of the earphone of the present invention;

[0040] Figure 7 Schematic diagram of signal transmission of the noise reduction processing method of the earphone of the present invention;

[0041] Figure 8 Schematic flow chart of the fourth exemplary embodiment of the noise reduction processing method of the earphone of the present invention.

[0042] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Refer to Figure 1 and Figure 2 , Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the earphone related to the present invention, Figure 2 is a flat layout diagram when the rubber sleeve in the earphone is not sleeved on the microphone.

[0045] The earphone 10 in this embodiment includes:

[0046] A housing 150;

[0047] A partition member 170, the partition member 170 divides the inner cavity of the housing 150 into a front cavity 130 and a rear cavity 140, and a sound leakage hole 171 communicating the front cavity 130 and the rear cavity 140 is provided on the partition member 170;

[0048] A speaker 120, the speaker 120 is located in the housing 150, and the sound output surface of the speaker 120 is located in the front cavity 130;

[0049] A feedforward microphone 130, the feedforward microphone 130 is fixed in the rear cavity 140 through a fixing member 160, the housing is provided with a first opening 151 communicating the feedforward microphone 130 with the external environment, and the fixing member 160 is provided with a second opening 161 communicating the feedforward microphone 130 with the rear cavity 140.

[0050] In the technical solution disclosed in this embodiment, the feedforward microphone 130 can detect external noise, i.e., environmental noise, through the first opening 151, transmit the noise in the front cavity 130 to the rear cavity 140 through the sound leakage holes 171 on the baffle 170, and the second opening 161 transmits the noise in the rear cavity 140 to the feedforward microphone 130, so that the feedforward microphone 130 can detect both environmental noise and the noise in the front cavity 130.

[0051] Optionally, the housing 10 is provided with a receiving groove (not shown in the figure) with one end open, the feedforward microphone 130 is located in the receiving groove (not shown in the figure), and the first opening 151 is provided at the bottom of the receiving groove (not shown in the figure); a rubber sleeve 180 is provided between the inner wall of the receiving groove (not shown in the figure) and the feedforward microphone 130, and the rubber sleeve 180 is provided with a sound guiding groove 181, and the sound guiding groove 181 communicates the rear cavity 140 with the sound receiving surface of the feedforward microphone 130; the fixing member 160 blocks the opening of the receiving groove (not shown in the figure).

[0052] By blocking the fixing member 160 at the opening of the receiving groove (not shown in the figure), it can be avoided that the feedforward microphone 130 comes out of the receiving groove (not shown in the figure) due to external vibration during the use of the earphone 1010; optionally, the fixing member 160 can be a fixing rubber sleeve 180, and the fixing rubber sleeve 180 is sleeved on the outer wall of the opening of the receiving groove (not shown in the figure). Since the fixing rubber sleeve 180 has elasticity, sleeving the fixing rubber sleeve 180 on the outer wall of the receiving groove (not shown in the figure) can achieve the fixing effect without adding other connecting parts such as screws and screw holes. At the same time, due to the elasticity of the fixing rubber sleeve 180, when the feedforward microphone 130 vibrates due to external vibration during the use of the earphone 1010, the fixing member 160 can avoid damaging the microphone 130.

[0053] It can be understood that the fixing member 160 can also be in other forms. For example, the fixing member 160 can be a cover plate provided at the opening of the receiving groove (not shown in the figure), and the cover plate is connected to the groove wall of the receiving groove (not shown in the figure). The connection method can be a cooperation connection of screws and screw holes or a snap connection and other various cooperation methods, which are not specifically limited.

[0054] Optionally, the sound guide groove 181 has a smooth inner wall. The sound guide groove 181 can be set as a columnar groove or a square groove for easy processing and forming, and the tube walls in the columnar groove or the square groove are smoothly transitioned to avoid reflecting the received audio.

[0055] Optionally, the partition member 170 is a partition board. Specifically, the thickness of the partition board is set according to needs. The edge of the partition board is connected to the inner wall of the housing 150. The connection method may include abutting, bonding or other connection methods. It can be understood that the partition member 170 can also adopt a block structure or other conventional shapes.

[0056] Further, the partition board and the housing 150 are integrally formed, that is to say, the partition board and the housing 150 are of an integral structure, that is, the partition board is formed by extending from the inner wall of the housing 150 to the inside. The integral structure is convenient for forming, has reliable connection and high structural strength. Of course, according to needs, the partition board and the housing 150 can also be a split structure connected by conventional fixed connection methods.

[0057] Optionally, the speaker 120 is fixed on the partition member 170. The way the speaker 120 is fixed on the partition member 170 can be that the partition member 170 is provided with fixing holes, and the speaker 120 is inserted into the fixing holes. Since the outer shell of the speaker 120 is generally conical, the size of the fixing holes can be set according to needs. The speaker 120 can be fixed in the fixing holes by bonding or clamping. The way of fixing through the fixing holes has a relatively simple structure, is convenient for forming, and has low processing difficulty.

[0058] Optionally, at least two sound leakage holes 171 are provided on the partition member 170. By providing at least two sound leakage holes 171, the noise in the front cavity 130 can be evenly transmitted to the rear cavity 140. When the speaker 120 is fixed on the partition member 170, the sound leakage holes 171 are evenly distributed along the circumference of the speaker 120. For example, when there are two sound leakage holes 171, the two sound leakage holes 171 are distributed on both sides of the speaker 120.

[0059] On Figure 1 and Figure 2 on the basis of Figure 3 , Figure 3 FIG. is a schematic diagram of the hardware architecture of the earphone related to the noise reduction processing method of the earphone of the present invention.

[0060] On the basis of the earphone described in the foregoing embodiment, the earphone may further include a feedforward microphone 210, a speaker 220, a processor 230, and a memory 240. The memory 240 can store the noise reduction processing program and the operating system of the earphone, and can also store the first transfer function.

[0061] When the noise reduction processing program of the earphone in the memory 240 is executed by the processor, the following steps are implemented:

[0062] Obtain the mixed audio signal collected by the feedforward microphone;

[0063] Process the mixed audio signal according to a preset first transfer function to obtain a first audio signal, where the first transfer function characterizes the relationship between the audio signal detected by the feedback microphone and the audio signal detected by the feedforward microphone when the feedforward microphone and the feedback microphone are installed;

[0064] Perform filtering processing on the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal;

[0065] Control the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the environmental noise and the noise in the front cavity.

[0066] Refer to Figure 4 , Figure 4 FIG. 1 is a schematic flowchart of the first exemplary embodiment of the noise reduction processing method of the earphone of the present invention. In this embodiment, the noise reduction processing method of the earphone includes the following steps:

[0067] Step S10, obtain the mixed audio signal collected by the feedforward microphone;

[0068] The mixed audio signal detected by the feedforward microphone includes an environmental noise signal and a speaker sound signal fed back to the feedforward microphone from the sound played by the speaker. Since the front cavity and the rear cavity are conducting, the residual noise signal in the front cavity will be transmitted to the feedforward microphone, so the mixed audio signal detected by the feedforward microphone will also include residual noise.

[0069] Step S20, process the mixed audio signal according to a preset first transfer function to obtain a first audio signal, where the first transfer function characterizes the relationship between the audio signal detected by the feedback microphone and the audio signal detected by the feedforward microphone when the feedforward microphone and the feedback microphone are installed;

[0070] In the design stage, a feedback microphone can be set in the front cavity of the earphone, and an external sound source device is controlled to play an audio signal. At this time, the feedback noise signal detected by the feedback microphone and the feedforward noise signal detected by the feedforward microphone can be detected, and the first transfer function can be generated according to the feedback noise signal and the feedforward noise signal, and the first transfer function is burned into the memory of the earphone; after the detection is completed, the feedback microphone in the earphone is cancelled, that is, the earphone used after leaving the factory only includes a feedforward microphone.

[0071] In the technical solution disclosed in this embodiment, during the use of the earphone, the mixed audio signal detected by the feedforward microphone is converted through the first transfer function, and can be converted into a feedback noise signal.

[0072] Step S30: Filter the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal;

[0073] In the solution disclosed in this embodiment, since the mixed audio signal contains the audio signal output by the speaker, if the received mixed audio signal is directly processed, the noise suppression signal output by the speaker will include the suppression signal of the audio signal output by the speaker, which will cancel the audio signal output by the speaker. Therefore, in order to reduce the impact on the audio signal output by the speaker, the speaker audio signal in the detected mixed audio signal can be filtered to obtain a second audio signal, so as to reduce the impact on the audio signal output by the speaker during noise reduction.

[0074] Step S40: Control the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the environmental noise and the noise in the front cavity.

[0075] In the technical solution disclosed in this embodiment, the anti-phase signals of the first audio signal and the second audio signal can be generated respectively, and the anti-phase signals of the first audio signal and the second audio signal are used as noise suppression and output to the speaker for playback. That is, step S40 includes:

[0076] Obtain a first anti-phase signal of the first audio signal and a second anti-phase signal of the second audio signal;

[0077] Control the speaker to output the first anti-phase signal and the second anti-phase signal to cancel the environmental noise and the noise in the front cavity.

[0078] Alternatively, it is also possible to limit the first audio signal and the second audio signal to be superimposed to generate a third anti-phase signal, and directly control the microphone to output the third anti-phase signal corresponding to the superimposed audio signal as the noise suppression signal. That is, step S40 includes:

[0079] Superimpose the first audio signal and the second audio signal to generate a superimposed audio signal;

[0080] Control the speaker to output the third anti-phase signal corresponding to the superimposed audio signal to cancel the environmental noise and the noise in the front cavity.

[0081] In the noise reduction processing method of the earphone disclosed in this embodiment, when the feedforward microphone located in the rear cavity detects the mixed noise signal, the feedback noise signal is obtained according to the first transfer function, and at the same time, the mixed audio signal is filtered according to the speaker audio signal to obtain the feedforward noise signal. The corresponding noise suppression signal is output by controlling the speaker according to the feedback noise signal and the feedforward noise signal, so that feedforward noise reduction and feedback noise reduction can be realized, the use of the microphone is reduced, and the cost is reduced.

[0082] Further, with reference to Figure 5 Based on the first embodiment, a second embodiment of the noise reduction method for the earphone of the present invention is proposed. In this embodiment, step S30 includes:

[0083] Step S31, processing the speaker audio signal according to a preset second transfer function to obtain a third audio signal, where the second transfer function characterizes the relationship between the audio signal output by the speaker detected by the feedforward microphone and the speaker audio signal input to the speaker;

[0084] Step S32, filtering the third audio signal in the mixed audio signal to obtain the second audio signal.

[0085] In a quiet environment, control the speaker of the earphone to output an audio signal. At this time, the audio signal detected by the feedforward microphone can be detected. The second transfer function is obtained according to the audio signal detected by the feedforward microphone and the speaker audio signal input to the speaker, and the second transfer function is stored in the memory of the earphone; during the use of the earphone, the speaker audio signal input to the speaker is converted through the second transfer function to obtain a third audio signal, and the converted audio signal is equivalent to the audio signal output by the speaker detected by the feedforward microphone.

[0086] The technical solution disclosed in this embodiment converts the speaker audio signal into the speaker signal actually detected by the feedforward microphone through the second transfer function, and then filters out the speaker signal in the mixed audio signal, so that the filtered second audio signal, that is, the noise signal, is closer to the environmental noise and the noise reduction effect is improved.

[0087] Further, with reference to Figure 6 Based on the first embodiment, a third embodiment of the noise reduction method for the earphone of the present invention is proposed. In this embodiment, step S30 in the first embodiment includes:

[0088] Step S33, analyzing the speaker audio signal by using an adaptive filter to determine a target reference signal corresponding to the minimum error signal of the adaptive filter;

[0089] Step S34, filtering the target reference signal in the mixed audio signal to obtain the second audio signal.

[0090] Since there is a certain difference between the speaker audio signal input to the speaker and the speaker signal picked up by the feedforward microphone, in order to improve the noise reduction accuracy, an adaptive filter is used to analyze the speaker audio signal input to the speaker in this embodiment. As Figure 7As shown, the mixed audio signal is n + s, where n is the noise signal, s represents the speaker signal output by the speaker detected by the feedforward microphone, x is the speaker audio signal input to the speaker, and y is the audio signal output by the adaptive filter. Among them, the speaker audio signal x input to the speaker can be used as the initial reference signal, and then the filtering parameters are continuously adjusted to analyze the initial reference signal to obtain different output signals. The error signal e between each output signal of the adaptive filter and the mixed audio signal n + s is determined, and the output signal y when the error signal e is minimized is obtained as the target reference signal. The obtained target reference signal is the audio signal output by the speaker detected by the feedforward microphone. Filtering the target reference signal in the mixed audio signal n + s, the obtained noise signal, that is, the second audio signal, is closer to the ambient noise signal, improving the noise reduction effect.

[0091] Further, referring to Figure 8 , based on any one of the first to third embodiments, an embodiment four of the noise reduction method of the earphone of the present invention is proposed. In this embodiment, after step S40, the following steps are included:

[0092] Step S50, updating the noise suppression signal in the speaker audio signal with the currently output noise suppression signal.

[0093] When the user uses the earphone to make a call or play music, the speaker audio signal input to the speaker includes a noise suppression signal and a playback audio signal. The playback audio signal can include the voice signal input by the user through the microphone during a call, or the music signal transmitted through the terminal connected to the earphone or the music signal locally stored in the earphone; after controlling the speaker to output the noise suppression signal, the noise suppression signal in the speaker audio signal can be updated.

[0094] In the technical solution disclosed in this embodiment, since the earphone performs noise reduction in real time, the noise suppression signal changes continuously. At this time, the noise suppression signal in the speaker audio signal is updated correspondingly, making the noise reduction more accurate.

[0095] Referring to Figure 7 , Figure 7 is a signal transmission schematic diagram of the noise reduction processing method of the earphone of the present invention. Through this schematic diagram, the present application is specifically described. This solution includes feedforward noise reduction and feedback noise reduction:

[0096] The feedback noise reduction includes: the feedforward microphone detects the mixed audio signal n + s, where n is the noise signal, s represents the speaker signal output by the speaker detected by the feedforward microphone. The mixed audio signal n + s is processed by the first transfer function H1 to obtain the first audio signal P1, and P1 is transmitted to the filter FBH to generate an anti-phase signal F1 (i.e., the noise suppression signal), and the anti-phase signal F1 is transmitted to the speaker;

[0097] Feedforward noise reduction includes: using the speaker audio signal x input to the speaker as the initial reference signal, then continuously adjusting the filtering parameters of the adaptive filter L to analyze the initial reference signal to obtain different output signals y, determining the error signal e between each output signal of the adaptive filter L and the mixed audio signal n + s, obtaining the output signal y when the error signal e is minimized as the target reference signal, then filtering the target reference signal y in the mixed audio signal n + s to obtain the second audio signal P2, transmitting P2 to the filter FFH to generate an inverted signal F2 (i.e., the noise suppression signal), and transmitting the inverted signal F1 to the speaker.

[0098] The present invention also provides a computer-readable storage medium, on which a noise reduction processing program for headphones is stored. When the noise reduction processing program for headphones is executed by a processor, it implements the noise reduction processing method for headphones as described in the above embodiments.

[0099] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including that element.

[0100] The serial numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0101] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of the present invention.

[0102] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An earphone, characterized in that, the earphone comprises: a housing; a partition member that divides the inner cavity of the housing into a front cavity and a rear cavity, and sound leakage holes communicating the front cavity and the rear cavity are provided on the partition member, there are at least two sound leakage holes, and they are evenly distributed along the circumference of the speaker; a speaker located inside the housing, and the sound emitting surface of the speaker is located in the front cavity; a feedforward microphone fixed in the rear cavity through a fixing member, a first opening communicating the feedforward microphone with the external environment is provided on the housing, and a second opening communicating the feedforward microphone with the rear cavity is provided on the fixing member; The feedforward microphone detects external noise, i.e., ambient noise, through the first opening, and transmits the noise in the front cavity to the rear cavity through the sound leakage holes on the partition member, and the second opening transmits the noise in the rear cavity to the feedforward microphone, so that the feedforward microphone can detect ambient noise and the noise in the front cavity at the same time; Wherein, a receiving groove with one end open is provided on the housing, the feedforward microphone is located in the receiving groove, and the first opening is provided at the bottom of the receiving groove; a rubber sleeve is provided between the inner wall of the receiving groove and the feedforward microphone, and a sound guiding groove is provided on the rubber sleeve, the sound guiding groove is a columnar groove or a square groove, and the tube walls in the columnar groove or the square groove are smoothly transitioned; the fixing member blocks the opening of the receiving groove.

2. A noise reduction processing method for an earphone, applied to an earphone, characterized in that, the earphone is the earphone described in claim 1, and the noise reduction processing method of the earphone comprises: acquiring a mixed audio signal collected by the feedforward microphone; processing the mixed audio signal according to a preset first transfer function to obtain a first audio signal, and the first transfer function represents the relationship between the audio signal detected by the feedback microphone and the audio signal detected by the feedforward microphone when the feedforward microphone and the feedback microphone are installed; filtering the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal; controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the ambient noise and the noise in the front cavity; Wherein, the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the ambient noise and the noise in the front cavity includes: superposing the first audio signal and the second audio signal to generate a superposed audio signal; controlling the speaker to output a third anti-phase signal corresponding to the superposed audio signal to cancel the ambient noise and the noise in the front cavity.

3. The noise reduction processing method for an earphone as described in claim 2, characterized in that, the step of filtering the mixed audio signal according to the speaker audio signal input by the speaker to obtain a second audio signal includes: processing the speaker audio signal according to a preset second transfer function to obtain a third audio signal, and the second transfer function represents the relationship between the audio signal output by the speaker detected by the feedforward microphone and the speaker audio signal input by the speaker; Filter the third audio signal in the mixed audio signal to obtain the second audio signal.

4. The noise reduction processing method of the earphone according to claim 2, wherein, the step of filtering the mixed audio signal according to the speaker audio signal input by the speaker to obtain the second audio signal includes: Analyze the speaker audio signal by using an adaptive filter to determine a target reference signal corresponding to the minimum error signal of the adaptive filter; Filter the target reference signal in the mixed audio signal to obtain the second audio signal.

5. The noise reduction processing method of the earphone according to claim 2, wherein, the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal to cancel the environmental noise and the noise in the front cavity includes: Obtain a first inverted signal of the first audio signal and a second inverted signal of the second audio signal; Control the speaker to output the first inverted signal and the second inverted signal to cancel the environmental noise and the noise in the front cavity.

6. The noise reduction processing method of the earphone according to claim 2, wherein, the speaker audio signal includes the noise suppression signal and the playback audio signal.

7. The noise reduction processing method of the earphone according to claim 6, wherein, after the step of controlling the speaker to output a corresponding noise suppression signal according to the first audio signal and the second audio signal, further includes: Update the noise suppression signal in the speaker audio signal by using the currently output noise suppression signal.

8. An earphone, wherein, the earphone includes a memory, a processor, and a noise reduction processing program of the earphone stored on the memory and executable on the processor. The microphone and the speaker are connected to the processor. When the noise reduction processing program of the earphone is executed by the processor, the noise reduction processing method of the earphone according to any one of claims 2-7 is implemented.

9. A computer-readable storage medium, wherein, a noise reduction processing program of the earphone is stored on the computer-readable storage medium. When the noise reduction processing program of the earphone is executed by a processor, the steps of the noise reduction processing method of the earphone according to any one of claims 2-7 are implemented.

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