Earphone and electronic device

Abstract

This application discloses an earphone and an electronic device, belonging to the field of electronic technology. The earphone includes a power supply, a first branch, and a second branch. The first branch and the second branch are connected in parallel to the power supply. The first branch is equipped with a first speaker, and the second branch is equipped with a second speaker. The sound-emitting surfaces of the first speaker and the second speaker are arranged opposite to each other. Specifically, when the audio signal frequency is in the low-frequency range, the first sound wave generated by the first speaker and the second sound wave generated by the second speaker are in phase. Using the technical solution of this application can improve the sound effect of the earphone.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to a pair of headphones and an electronic device. Background Technology

[0002] Open-back headphones are a type of headphone that does not completely seal off the ear canal. Unlike traditional in-ear or closed-back headphones, open-back headphones do not block the ear canal, do not cause pressure on the ears when worn, and allow users to hear external sounds, thus maintaining their awareness of their surroundings while listening to music. Open-back headphones are favored by users for their superior comfort, reduced auditory fatigue, and good breathability.

[0003] However, currently, because the speakers in open-back headphones are far from the ear canal and are not sealed to the ear canal, they suffer from low volume, severe sound leakage, and poor sound quality. In other words, open-back headphones have poor sound performance. Utility Model Content

[0004] In view of this, this application provides a pair of headphones and an electronic device that can improve the sound quality of the headphones.

[0005] On one hand, embodiments of this application provide an earphone, which includes a power supply, a first branch, and a second branch;

[0006] The first branch and the second branch are connected in parallel to the power supply. The first branch is equipped with a first speaker, and the second branch is equipped with a second speaker. The sound-emitting surfaces of the first speaker and the second speaker are arranged opposite to each other.

[0007] Specifically, when the audio signal frequency is in the low-frequency range, the first sound wave generated by the first speaker and the second sound wave generated by the second speaker are in phase.

[0008] The headphones provided in this application embodiment have two speakers. Since the sound waves generated by the two speakers are in phase when the audio signal frequency is in the low frequency range, the sound waves of the two speakers have a superposition effect, which can improve the loudness generated by the headphones in the low frequency range, thereby improving the sensitivity of the headphones in the low frequency range and improving the sound effect of the headphones.

[0009] In some possible implementations, the headphones further include a frequency divider circuit that is turned on when the audio signal frequency is in the high-frequency range, so as to reverse the current direction of the second speaker;

[0010] The phase difference between the third sound wave generated by the second speaker when the audio signal is in the high-frequency range and the second sound wave generated by the second speaker when the audio signal frequency is in the low-frequency range is 180°.

[0011] By employing the technical solution of this application, a frequency divider circuit is used to reverse the current flow of the second speaker in the high-frequency range. This ensures that the phase difference between the third sound wave generated by the second speaker in the high-frequency range and the second sound wave generated by it in the low-frequency range is 180°, and also that the phase difference between the third sound wave generated by the second speaker in the high-frequency range and the sound wave generated by the first speaker in the high-frequency range is 180°. This configuration significantly reduces the peak value of the headphone's high-frequency response, thereby reducing the headphone's sensitivity in the high-frequency range, effectively reducing sound leakage in the high-frequency range, and improving the headphone's sound quality. This allows for more flexible frequency response and phase adjustment, resulting in a smoother frequency response curve for the headphone. Without increasing the headphone's size, it improves low-frequency loudness, reduces high-frequency sound leakage, and enhances sound quality, thus improving the headphone's overall sound performance.

[0012] In some possible implementations, the frequency divider circuit includes a third branch and a fourth branch connected in parallel to the power supply, the third branch being connected in parallel with the second branch, the fourth branch being connected in parallel with the second branch, the third branch having a capacitor, and the fourth branch having a resistor.

[0013] Using the technical solution of this application, the capacitor in the frequency division circuit has the function of passing high frequencies and blocking low frequencies, and the resistor can protect the second speaker. This ensures that the frequency division circuit is turned on when the audio signal frequency is in the high frequency range, so that the current direction of the second speaker can be reversed when the audio signal frequency changes from the low frequency range to the high frequency range. This makes the phase difference between the third sound wave generated by the second speaker in the high frequency range and the second sound wave generated by the second speaker in the low frequency range reach 180°, reducing the peak value of the headphone's high frequency response and improving the headphone's sound effect.

[0014] In some possible implementations, the earphone further includes a fifth branch, which is connected in series with the first and second branches after being connected in parallel. The fifth branch is connected to the power supply and is equipped with a first digital-to-analog converter.

[0015] Using the technical solution of this application, a first digital-to-analog converter can be used to convert digital audio signals into analog signals to drive the first and second speakers to vibrate and generate sound waves.

[0016] In some possible implementations, the first branch is further provided with a second digital-to-analog converter connected in series with the first speaker. The second digital-to-analog converter is used to drive the first speaker to generate a fourth sound wave when the audio signal frequency is in the high frequency range, and is also used to drive the first speaker to generate the first sound wave when the audio signal frequency is in the low frequency range.

[0017] The second branch is also provided with a third digital-to-analog converter connected in series with the second speaker. The third digital-to-analog converter is used to drive the second speaker to generate a fifth sound wave when the audio signal frequency is in the high frequency range, and is also used to drive the second speaker to generate the second sound wave when the audio signal frequency is in the low frequency range.

[0018] The fourth sound wave and the fifth sound wave have a phase difference of 180°, and the first sound wave and the second sound wave are in phase.

[0019] By employing the technical solution of this application, a second digital-to-analog converter and a third digital-to-analog converter can be used to independently drive the first and second speakers, enabling them to generate in-phase waveforms in the low-frequency range. This improves the loudness of the headphones in the low-frequency range, thus increasing their sensitivity. Simultaneously, the second and third digital-to-analog converters can also enable the first and second speakers to generate two sound waves with a 180° phase difference in the high-frequency range. This reduces the peak value of the headphone's high-frequency response, improving its sound quality. This allows for more flexible frequency response and phase adjustment, resulting in a smoother frequency response curve for the headphones. Without increasing the size of the headphones, it enhances low-frequency loudness, reduces high-frequency leakage, and improves sound quality, thus enhancing the overall sound performance of the headphones.

[0020] In some possible implementations, the earphones have a housing, and the first speaker and the second speaker are located inside the housing;

[0021] The sound-emitting surface of the first speaker, the sound-emitting surface of the second speaker, and the housing form a front cavity, and the front cavity is provided with a sound-emitting hole exposed on the surface of the housing;

[0022] The sound inlet surface of the first speaker forms a first rear cavity that is separated from the front cavity between the housing and the housing. The first rear cavity is provided with a first rear vent hole that is exposed on the surface of the housing.

[0023] The second speaker's sound inlet surface forms a second rear cavity separated from the front cavity between itself and the housing. The second rear cavity is provided with a second rear vent hole exposed on the surface of the housing.

[0024] Using the technical solution of this application, the two rear leakage holes and one sound outlet hole constitute an acoustic dipole structure, so that the sound waves in the first rear cavity and the sound waves in the second rear cavity are opposite in phase to the sound waves in the front cavity. In this way, the two sound waves with opposite phases can cancel each other out in the far field, thereby achieving the effect of reducing headphone sound leakage.

[0025] In some possible implementations, the first rear vent hole and the second rear vent hole are arranged symmetrically.

[0026] By adopting the technical solution of this application, two rear leakage holes are symmetrically set, which can not only improve the effect of the acoustic dipole in reducing sound leakage, but also ensure the air pressure balance inside the headphones, so as to avoid the sound quality degradation caused by unstable air pressure in the headphones.

[0027] In some possible implementations, the first rear vent hole is offset from the first horn in the axial direction of the first horn;

[0028] The second rear vent hole is offset from the second horn along the axial direction of the second horn.

[0029] By adopting the technical solution of this application, since the rear bleed hole and the corresponding speaker are misaligned in the axial direction of the speaker, interference between the rear bleed hole and the speaker can be avoided, thus ensuring that the headphones have better sound quality.

[0030] In some possible implementations, the headphones also have a tuning mesh located between the sound-emitting surfaces of the first speaker and the second speaker, wherein the first speaker and the second speaker are symmetrical about the tuning mesh.

[0031] By adopting the technical solution of this application, by adding a tuning mesh between the two speakers, the interference between the two speakers can be better avoided, ensuring the stability of the sound waves generated by the speakers and improving the sound effect of the headphones.

[0032] On the other hand, this application also provides an electronic device, which includes the headphones described in any one of the above embodiments of this application.

[0033] The electronic device provided in this application includes the aforementioned headphones. Since the headphones have better sound quality, they can improve the user experience of the electronic device. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a circuit diagram of an earphone provided in an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of another internal circuit of an earphone provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of another internal circuit of an earphone provided in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of another internal circuit of an earphone provided in an embodiment of this application;

[0039] Figure 5 This is a cross-sectional schematic diagram of an earphone provided in an embodiment of this application;

[0040] Figure 6 This is a cross-sectional schematic diagram of another type of earphone provided in an embodiment of this application;

[0041] Figure 7 This is a frequency response diagram of an earphone and related technology earphones provided in an embodiment of this application.

[0042] Figure label:

[0043] 100. Power supply;

[0044] 200, First branch; 210, First loudspeaker; 220, Second digital-to-analog converter;

[0045] 300, Second branch; 310, Second horn; 320, Third digital-to-analog converter;

[0046] 400. Frequency divider circuit; 410. Third branch; 420. Fourth branch; 411. Capacitor; 421. Resistor;

[0047] 500, Fifth Branch; 510, First Digital-to-Analog Converter;

[0048] 600, housing; 610, front cavity; 620, first rear cavity; 630, second rear cavity; 611, sound outlet; 621, first rear vent hole; 631, second rear vent hole;

[0049] 700, Tuning Network.

[0050] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art.

[0053] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0054] Combination Figure 1 and Figure 5 As shown in the illustration, this application provides an earphone, which includes a power supply 100, a first branch 200, and a second branch 300. The first branch 200 and the second branch 300 are connected in parallel to the power supply 100. The first branch 200 is equipped with a first speaker 210, and the second branch 300 is equipped with a second speaker 310. The sound-emitting surfaces of the first speaker 210 and the second speaker 310 are arranged opposite to each other. When the audio signal frequency is in the low-frequency range, the first sound wave generated by the first speaker 210 and the second sound wave generated by the second speaker 310 are in phase. It should be understood that the power supply 100 in this application embodiment is alternating current. The first speaker 210 and the second speaker 310 have the same structure. In this application embodiment, the first speaker 210 and the second speaker 310 respectively include components such as a diaphragm, a voice coil, and a magnet. An electromagnetic induction is formed between the voice coil and the magnet. When current passes through the voice coil, a magnetic field is generated, thereby driving the diaphragm to vibrate and generate sound waves.

[0055] The headphones provided in this application embodiment have two speakers. Since the sound waves generated by the two speakers are in phase when the audio signal frequency is in the low frequency range, the sound waves of the two speakers have a superposition effect, which can improve the loudness generated by the headphones in the low frequency range, thereby improving the sensitivity of the headphones in the low frequency range and improving the sound effect of the headphones.

[0056] The following is in conjunction with the appendix Figures 1 to 7 The details and functions of the headphones provided in the embodiments of this application will be described in more specific and detailed manner.

[0057] like Figure 2As shown, in some possible embodiments, the headphones further include a frequency divider circuit 400, which is used to conduct when the audio signal frequency is in the high-frequency range, so that the current direction of the second speaker 310 is reversed. The phase difference between the third sound wave generated by the second speaker 310 when the audio signal frequency is in the high-frequency range and the second sound wave generated by the second speaker 310 when the audio signal frequency is in the low-frequency range is 180°. In some embodiments, the low-frequency range is a frequency greater than the first frequency and not greater than the second frequency, and the high-frequency range is a frequency greater than the second frequency and less than the third frequency. It should be noted that the low-frequency range in this embodiment can be, for example, 20Hz to 1000Hz, and the high-frequency range can be, for example, 1000Hz to 6000Hz. The low-frequency range and high-frequency range can be adjusted according to requirements, and the aforementioned second frequency can be referred to as the crossover point. It should be understood that when the frequency of the audio signal changes from less than the second frequency to greater than the second frequency, the current of the second speaker 310 reverses, that is, the positive terminal of the second speaker 310 changes from being connected to the positive terminal of the power supply 100 to being connected to the negative terminal of the power supply 100, and the negative terminal of the second speaker 310 changes from being connected to the negative terminal of the power supply 100 to being connected to the positive terminal of the power supply 100. The phase difference of the sound waves generated by the second speaker 310 before and after the frequency division point of the audio signal is 180°. It should be noted that by using the frequency divider circuit 400 to reverse the current flow of the second speaker 310 in the high-frequency range, the positive terminal of the second speaker 310 changes from being connected to the positive terminal of the power supply 100 to being connected to the negative terminal of the power supply 100, and the negative terminal of the second speaker 310 changes from being connected to the negative terminal of the power supply 100 to being connected to the positive terminal of the power supply 100. At this time, the positive terminal of the first speaker 210 remains connected to the positive terminal of the power supply 100, and the negative terminal of the first speaker 210 remains connected to the negative terminal of the power supply 100. This ensures that the phase difference between the sound wave generated by the second speaker 310 in the high-frequency range and the sound wave generated by the first speaker 210 in the high-frequency range is 180°. This configuration significantly reduces the peak value of the headphone's high-frequency response, thereby reducing the headphone's sensitivity in the high-frequency range, effectively reducing sound leakage in the high-frequency range, and improving the headphone's sound quality. This allows for more flexible frequency response and phase adjustment, resulting in a smoother frequency response curve for the headphones. Without increasing the size of the headphones themselves, it improves low-frequency loudness, reduces high-frequency leakage, and enhances sound quality, thus improving the sound performance of the headphones.

[0058] like Figure 2As shown, in some possible embodiments, the frequency divider circuit 400 includes a third branch 410 and a fourth branch 420 connected in parallel to the power supply 100, respectively. The third branch 410 is connected in parallel with the second branch 300, and the fourth branch 420 is connected in parallel with the second branch 300. The third branch 410 is provided with a capacitor 411, and the fourth branch 420 is provided with a resistor 421. It should be noted that capacitor 411 in the crossover circuit 400 has the function of passing high frequencies and blocking low frequencies, and resistor 421 can protect the second speaker 310. This ensures that the crossover circuit 400 is turned on when the audio signal frequency is in the high frequency range, so that the current direction of the second speaker 310 can be reversed when the audio signal frequency changes from the low frequency range to the high frequency range. That is, the positive terminal of the second speaker 310 changes from being connected to the positive terminal of the power supply 100 to being connected to the negative terminal of the power supply 100, and the negative terminal of the second speaker 310 changes from being connected to the negative terminal of the power supply 100 to being connected to the positive terminal of the power supply 100. At this time, the positive terminal of the first speaker 210 is still connected to the positive terminal of the power supply 100, and the negative terminal of the first speaker 210 is still connected to the negative terminal of the power supply 100. This makes the phase difference between the sound wave generated by the second speaker 310 in the high frequency range and the sound wave generated by the first speaker 210 in the low frequency range reach 180°, reducing the peak value of the headphone's high frequency response and improving the headphone's sound effect. It should be understood that the hardware frequency divider circuit 400 formed by capacitor 411 and resistor 421 has the advantage of low delay, ensuring that the waveforms generated by the two speakers are exactly opposite.

[0059] like Figure 3 As shown, in some possible embodiments, the headphones further include a fifth branch 500. The first branch 200 and the second branch 300 are connected in parallel and then in series with the fifth branch 500. The fifth branch 500 is connected to the power supply 100, and the fifth branch 500 is equipped with a first digital-to-analog converter 510. It should be noted that the first digital-to-analog converter 510 can convert digital audio signals into analog signals to drive the first speaker 210 and the second speaker 310 to vibrate and generate sound waves.

[0060] like Figure 4As shown, in some possible embodiments, the first branch 200 is further provided with a second digital-to-analog converter 220 connected in series with the first speaker 210. The second digital-to-analog converter 220 is used to drive the first speaker 210 to generate a fourth sound wave when the audio signal frequency is in the high-frequency range, and also to drive the first speaker 210 to generate a first sound wave when the audio signal frequency is in the low-frequency range. The second branch 300 is further provided with a third digital-to-analog converter 320 connected in series with the second speaker 310. The third digital-to-analog converter 320 is used to drive the second speaker 310 to generate a fifth sound wave when the audio signal frequency is in the high-frequency range, and also to drive the second speaker 310 to generate a second sound wave when the audio signal frequency is in the low-frequency range. The fourth and fifth sound waves have a phase difference of 180°, and the first and second sound waves are in phase. It should be noted that the second digital-to-analog converter 220 and the third digital-to-analog converter 320 can independently drive the first speaker 210 and the second speaker 310, respectively, enabling the first speaker 210 and the second speaker 310 to generate waveforms in phase in the low-frequency range. This improves the loudness of the headphones in the low-frequency range, i.e., increases the sensitivity of the headphones in the low-frequency range. Simultaneously, the second digital-to-analog converter 220 and the third digital-to-analog converter 320 can also enable the first speaker 210 and the second speaker 310 to generate two sound waves with a 180° phase difference in the high-frequency range. This reduces the peak value of the headphone's high-frequency response, improving the headphone's sound effect. This allows for more flexible frequency response and phase adjustment, making the headphone's frequency response curve smoother. Without increasing the size of the headphones, it improves low-frequency loudness, reduces high-frequency leakage, and enhances sound quality, i.e., improves the headphone's sound effect. It should be understood that in the embodiments of this application, the fifth sound wave and the third sound wave can be the same sound wave.

[0061] like Figure 5 As shown, in some possible embodiments, the headphones have a housing 600, with a first speaker 210 and a second speaker 310 located within the housing 600. The sound-emitting surfaces of the first speaker 210 and the second speaker 310, together with the housing 600, form a front cavity 610, which has a sound outlet 611 exposed on the surface of the housing 600. A first rear cavity 620, separated from the front cavity 610, is formed between the sound-inlet surface of the first speaker 210 and the housing 600, and the first rear cavity 620 has a first rear vent hole 621 exposed on the surface of the housing 600. A second rear cavity 630, separated from the front cavity 610, is formed between the sound-inlet surface of the second speaker 310 and the housing 600, and the second rear cavity 630 has a second rear vent hole 631 exposed on the surface of the housing 600. It should be noted that the two rear vent holes and one sound outlet 611 constitute an acoustic dipole structure, so that the sound waves of the first rear cavity 620 and the second rear cavity 630 are opposite in phase to the sound waves of the front cavity 610. In this way, the two sound waves with opposite phases can cancel each other out in the far field, thereby reducing the sound leakage of the headphones.

[0062] like Figure 5 As shown, in some possible embodiments, the first rear vent hole 621 and the second rear vent hole 631 are symmetrically arranged. It should be noted that by symmetrically arranging the two rear vent holes, the effect of the acoustic dipole in reducing sound leakage can be improved, and the air pressure balance inside the headphones can be ensured to avoid the sound quality degradation caused by unstable air pressure in the headphone speakers.

[0063] like Figure 5 As shown, in some possible embodiments, the first rear vent hole 621 is offset from the first horn 210 along its axial direction. Similarly, the second rear vent hole 631 is offset from the second horn 310 along its axial direction. It should be noted that because the rear vent holes and their corresponding horns are offset along the horn's axial direction, interference between the rear vent holes and the horns can be avoided, ensuring better sound quality for the headphones.

[0064] like Figure 6 As shown, in some possible embodiments, the headphones also have a tuning mesh 700, located between the sound-emitting surfaces of the first speaker 210 and the second speaker 310, wherein the first speaker 210 and the second speaker 310 are symmetrical about the tuning mesh 700. It should be noted that by adding a tuning mesh 700 between the two speakers, interference between them can be better avoided, ensuring stable sound waves generated by the speakers and improving the sound quality of the headphones. In some embodiments, the tuning mesh 700 can be made of metal or plastic and has a plurality of evenly distributed holes. The tuning mesh 700 is sound-transparent and can disperse airflow to reduce interference between the first speaker 210 and the second speaker 310, ensuring better sound quality for the headphones.

[0065] In summary, the headphones provided in this application embodiment utilize two speakers arranged opposite each other, which can improve the loudness of the speakers. Simultaneously, by employing a crossover circuit 400 or configuring a separate digital-to-analog converter for each speaker, the frequency response and phase of the two speakers can be flexibly adjusted, ensuring that the phase of the sound waves from the two speakers is consistent in the low-frequency range and that the waveforms of the sound waves are opposite in the high-frequency range. That is, the phase difference between the two sound waves in the high-frequency range is 180°, thereby improving the loudness of the headphones in the low-frequency range and reducing the peak loudness of the headphones in the high-frequency range, thus reducing headphone leakage. Furthermore, the headphones provided in this application embodiment, by symmetrically arranging two rear vent holes on the housing 600, can form an acoustic dipole structure with the sound outlet 611 of the headphone front cavity 610, further reducing headphone leakage and improving the headphone's sound effect.

[0066] The following is in conjunction with the appendix Figure 7The sound effect of the headphones provided in this application embodiment is explained by testing the headphones (headphone 1) provided in this application embodiment with headphones (headphone 2 and headphone 3) in two other related technologies, and obtaining a frequency response graph with frequency on the horizontal axis and root mean square level on the vertical axis. It should be noted that headphone 2 has two speakers and the two speakers are always positively connected (i.e., the positive terminal of the speaker is always connected to the positive terminal of power supply 100, and the negative terminal of the speaker is always connected to the negative terminal of power supply 100), and headphone 3 has two speakers and the two speakers are always negatively connected (i.e., the positive terminal of the speaker is always connected to the negative terminal of power supply 100, and the negative terminal of the speaker is always connected to the positive terminal of power supply 100). The headphones 1 provided in this application embodiment can achieve phase consistency between the sound waves of the first speaker 210 and the sound waves of the second speaker 310 in the low frequency range, and a phase difference of 180° between the sound waves of the first speaker 210 and the sound waves of the second speaker 310 in the high frequency range. As can be seen from the test diagram, the frequency response curve of the headphone 1 provided in this application embodiment is smoother, which can increase the loudness in the low frequency range and reduce the peak loudness in the high frequency range. This can improve the sensitivity and sound quality of the sound in the low frequency range and avoid sound leakage in the high frequency range, thereby improving the sound effect of the headphone.

[0067] On the other hand, this application also provides an electronic device, which includes the headphones described in any of the above embodiments. It should be noted that the headphones in the electronic device provided in this application have the same composition and function as the headphones described in any of the above embodiments, and therefore will not be repeated here. The electronic device provided in this application includes the aforementioned headphones, which, due to their superior sound quality, enhance the user experience of the electronic device. In some embodiments, the electronic device further includes a charging case for housing and charging the headphones. In other embodiments, the electronic device also includes glasses connected to the headphones.

[0068] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0069] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An earphone, characterized by comprising: The earphone includes a power supply (100), a first branch (200), and a second branch (300); The first branch (200) and the second branch (300) are connected in parallel to the power supply (100). The first branch (200) is provided with a first speaker (210), and the second branch (300) is provided with a second speaker (310). The sound-emitting surfaces of the first speaker (210) and the second speaker (310) are arranged opposite to each other. When the audio signal frequency is in the low frequency range, the first sound wave generated by the first speaker (210) is in phase with the second sound wave generated by the second speaker (310).

2. The earphone of claim 1, wherein, The headphones also include a frequency divider circuit (400) which is turned on when the audio signal frequency is in the high frequency range, so that the current direction of the second speaker (310) is reversed; The phase difference between the third sound wave generated by the second speaker (310) when the audio signal is in the high frequency range and the second sound wave generated by the second speaker (310) when the audio signal frequency is in the low frequency range is 180°.

3. The earphone of claim 2, wherein The frequency divider circuit (400) includes a third branch (410) and a fourth branch (420) connected in parallel to the power supply (100). The third branch (410) is connected in parallel with the second branch (300), and the fourth branch (420) is connected in parallel with the second branch (300). The third branch (410) is provided with a capacitor (411), and the fourth branch (420) is provided with a resistor (421).

4. The earphone according to claim 2, characterized in that, The earphone also includes a fifth branch (500), the first branch (200) and the second branch (300) are connected in parallel and then connected in series with the fifth branch (500), the fifth branch (500) is connected to the power supply (100), and the fifth branch (500) is provided with a first digital-to-analog converter (510).

5. The earphone according to claim 1, characterized in that, The first branch (200) is also provided with a second digital-to-analog converter (220) connected in series with the first speaker (210). The second digital-to-analog converter (220) is used to drive the first speaker (210) to generate a fourth sound wave when the frequency of the audio signal is in the high frequency range, and is also used to drive the first speaker (210) to generate the first sound wave when the frequency of the audio signal is in the low frequency range. The second branch (300) is also provided with a third digital-to-analog converter (320) connected in series with the second speaker (310). The third digital-to-analog converter (320) is used to drive the second speaker (310) to generate a fifth sound wave when the frequency of the audio signal is in the high frequency range, and is also used to drive the second speaker (310) to generate the second sound wave when the frequency of the audio signal is in the low frequency range. The fourth sound wave and the fifth sound wave have a phase difference of 180°, and the first sound wave and the second sound wave are in phase.

6. The earphone according to claim 1, characterized in that, The earphone has a housing (600), and the first speaker (210) and the second speaker (310) are located inside the housing (600); The sound-emitting surface of the first speaker (210), the sound-emitting surface of the second speaker (310), and the housing (600) form a front cavity (610), and the front cavity (610) is provided with a sound outlet (611) exposed on the surface of the housing (600); The sound inlet surface of the first speaker (210) and the housing (600) form a first rear cavity (620) that is separated from the front cavity (610). The first rear cavity (620) is provided with a first rear vent hole (621) exposed on the surface of the housing (600). The second speaker (310) forms a second rear cavity (630) between its sound inlet surface and the housing (600), which is separated from the front cavity (610). The second rear cavity (630) is provided with a second rear vent hole (631) exposed on the surface of the housing (600).

7. The earphone according to claim 6, characterized in that, The first rear vent (621) and the second rear vent (631) are symmetrically arranged.

8. The earphone according to claim 6, characterized in that, In the axial direction of the first horn (210), the first rear vent (621) is offset from the first horn (210); In the axial direction of the second horn (310), the second rear vent (631) is offset from the second horn (310).

9. The earphone according to claim 6, characterized in that, The headphones also have a tuning mesh (700) located between the sound-emitting surfaces of the first speaker (210) and the second speaker (310), wherein the first speaker (210) and the second speaker (310) are symmetrical about the tuning mesh (700).

10. An electronic device, characterized in that, The electronic device includes headphones as claimed in any one of claims 1 to 9.

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