Double-channel sounding loudspeaker sounding structure and sounding method thereof

Abstract

The invention discloses a double-channel sounding loudspeaker sounding structure and a sounding method thereof, the double-channel sounding loudspeaker sounding structure comprises a double-channel sounding structural member, the top of the double-channel sounding structural member is provided with an upper loudspeaker, the bottom of the double-channel sounding structural member is provided with a lower loudspeaker, and the upper loudspeaker and the lower loudspeaker are located on the same central axis. The system has the advantage of high integration level, and solves the problem that the volume of a sound production structure of a loudspeaker is too large due to the fact that the loudspeaker needs to be laid flat and occupies more space when placed in an existing frequency division design scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of sound - producing devices, and particularly to a speaker sound - producing structure with dual - channel sound production and its sound - producing method. Background Technique

[0002] The speaker sound - producing structure belongs to a kind of sound - producing device. It mainly produces sound through a speaker. The speaker includes a diaphragm, a voice coil, a magnet, a washer, a centering spider, a surround, and a chassis. These components work together. When an electrical signal flows through the voice coil, the voice coil is subjected to a force in the magnetic field generated by the permanent magnet, thereby driving the diaphragm to vibrate and produce a sound corresponding to the original electrical signal. Speakers include high - frequency, low - frequency, and full - range speakers.

[0003] In the existing dual - speaker system, most of the practices are that two speakers produce sound in an opposed manner, which requires a large installation space. Most of the dual - speaker schemes are stacked in an opposed placement scheme, that is, diaphragm against diaphragm, which is suitable for full - range and bass speakers. The installation space is large and it is not suitable for crossover design. In the existing crossover design scheme, the speakers need to be laid out flat, which requires more plane space. Therefore, an integrated dual - speaker sound - producing structure that can reduce the occupied space is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a speaker sound - producing structure with dual - channel sound production and its sound - producing method, which has the advantage of high integration, and solves the problem that in the existing crossover design scheme, the speakers need to be laid out flat, occupying more space and resulting in an overly large volume of the speaker sound - producing structure.

[0005] To achieve the above object, the present invention provides the following technical solution: A speaker sound - producing structure with dual - channel sound production includes a dual - channel sound - producing structural member. An upper speaker is installed on the top of the dual - channel sound - producing structural member, and a lower speaker is installed on the bottom of the dual - channel sound - producing structural member. The upper speaker and the lower speaker are located on the same central axis.

[0006] Preferably, in a speaker sound - producing structure with dual - channel sound production of the present invention, a central hole is opened at the center inside the dual - channel sound - producing structural member, and the central hole is located on the side opposite to the upper speaker and the lower speaker.

[0007] Preferably, in a speaker sound - producing structure with dual - channel sound production of the present invention, side air holes are opened on the surface of the dual - channel sound - producing structural member, and the side air holes are communicated with the central hole.

[0008] Preferably, in a speaker sound - producing structure with dual - channel sound production of the present invention, the upper speaker and the lower speaker are one of a high - frequency speaker, a low - frequency speaker, or a full - range speaker.

[0009] Preferably, for a speaker sound - generating structure with dual - channel sound, an upper - speaker mounting groove for cooperating with an upper speaker is formed at the top of the dual - channel sound - generating structure member, and the upper speaker is fixedly installed in the inner cavity of the upper - speaker mounting groove.

[0010] Preferably, for a speaker sound - generating structure with dual - channel sound, a lower - speaker mounting groove for cooperating with a lower speaker is formed at the bottom of the dual - channel sound - generating structure member, and the lower speaker is fixedly installed in the inner cavity of the lower - speaker mounting groove.

[0011] Preferably, for a speaker sound - generating structure with dual - channel sound, a speaker PCB avoidance groove is formed in the inner cavity of the dual - channel sound - generating structure member, and a wiring port communicating with the speaker PCB avoidance groove is formed on the surface of the dual - channel sound - generating structure member.

[0012] Preferably, for a speaker sound - generating structure with dual - channel sound, the positive electrodes of the upper speaker and the lower speaker are electrically connected to the positive electrode of the audio system, and the negative electrodes of the upper speaker and the lower speaker are electrically connected to the negative electrode of the audio system.

[0013] Preferably, for a speaker sound - generating structure with dual - channel sound, an anti - magnetic member is installed in the inner cavity of the dual - channel sound - generating structure member. The anti - magnetic member is located on the side opposite to the upper speaker and the lower speaker. An anti - magnetic member mounting groove for cooperating with the anti - magnetic member is formed inside the dual - channel sound - generating structure member, and the anti - magnetic member is fixedly installed in the inner cavity of the anti - magnetic member mounting groove.

[0014] A sound - generating method for a speaker sound - generating structure with dual - channel sound includes the following steps:

[0015] S1. After the upper speaker and the lower speaker receive an audio signal, they work simultaneously. When both the upper speaker and the lower speaker are full - range speakers or bass speakers, the upper speaker emits sound to the outside, and the lower speaker emits sound to the outside together with the upper speaker through the middle hole and the side air holes, forming sound superposition and reducing the demand for sound - generating power.

[0016] S2. When the upper speaker is a low - frequency speaker and the lower speaker is a high - frequency speaker, the space of the upper - speaker mounting groove is reduced, leaving the side as the sound - emitting hole of the lower speaker to form a sound - generating channel. The middle hole is blocked by the upper speaker, so that the upper speaker and the lower speaker can cover a wider audio range and provide a more complete sound experience.

[0017] S3. After installing the anti-magnetic part inside the anti-magnetic part installation groove, the magnetic field efficiency of the speaker can be effectively improved, making the magnetic field distribution of the speaker more uniform, thus reducing distortion. The diaphragm directions of the upper speaker and the lower speaker are downward, and the magnet magnetization direction is opposite to that of the anti-magnetic part. The air pushed by the diaphragm of the upper speaker is discharged from the middle hole and the side air holes. The side air holes play a role in adjusting the damping of the speaker system, and the air in the middle hole can push the diaphragm of the lower speaker to move together, making the lower speaker easier to drive. To a certain extent, the power demand is reduced during frequency sound production. The anti-magnetic part plays a role in further compressing the magnetic field scattered outside the speaker, and can effectively reduce magnetic leakage. Since the polarity is opposite to that of the magnets of the upper speaker and the lower speaker, according to the principle of like poles repelling and opposite poles attracting, the magnetic induction lines of the lower speaker and the upper speaker will be bent back due to the repulsion of like poles. At this time, the magnetic field intensity of the lower speaker and the upper speaker will be enhanced. At the same time, since the magnetic field intensity at the edge is enhanced, the original magnetic field will also become more uniform. According to the Ampere force formula F = BLI, the Ampere force received by the speaker is enhanced after the magnetic field intensity is enhanced, thus improving the efficiency of the speaker. The degree of magnetic field uniformity is an important indicator for measuring the distortion of the speaker. When the magnetic field is non-uniform, the voice coil will receive more non-linear forces when moving in the magnetic field, resulting in distortion. After adding anti-magnetic, the degree of magnetic field uniformity is improved, thus improving the distortion of the speaker.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The speaker sound production structure of the present invention adopts the method of stacking two-channel speakers, which can not only improve the frequency response, but also reduce the horizontal space occupied by the stacked two speakers, making it more conducive to the installation and space optimization of the speaker sound production structure. This method can solve the problem of large assembly space of the two-speaker unit in the electronic device assembly. The upper speaker and the lower speaker are stacked and installed inside the two-channel sound production structure member. The upper speaker and the lower speaker are two full-range speakers, two bass speakers or one high-frequency and one bass speaker. When the upper speaker and the lower speaker are full-range or bass speakers, the overall frequency response can be improved. When the upper speaker and the lower speaker are one bass and one high-frequency speaker, by combining the two, a wider audio range can be covered, providing a more complete sound experience. By cleverly using the stacking method to change the sound output, the occupied space of the two-speaker structure is reduced, and it can be applied to small-volume electronic sound production devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is an exploded view of the present invention;

[0022] Figure 3 It is a cross-sectional view of the present invention;

[0023] Figure 4 Schematic diagram of the dual-channel sound generating structural member of the present invention;

[0024] Figure 5 Cross-sectional view of the dual-channel sound generating structural member of the present invention;

[0025] Figure 6 Schematic diagram of the installation state of the present invention Figure 1 ;

[0026] Figure 7 Schematic diagram of the installation state of the present invention Figure 2 ;

[0027] Figure 8 Schematic diagram of the structure of Embodiment 4 of the present invention;

[0028] Figure 9 Schematic diagram of the state of installing the anti-magnetic member of the present invention;

[0029] Figure 10 Schematic diagram of the dual-channel sound generating structural member with the anti-magnetic member installed according to the present invention;

[0030] Figure 11 Exploded view of the upper speaker of the present invention;

[0031] Figure 12 Simulation cloud map of the magnetic flux without the anti-magnetic member according to the present invention;

[0032] Figure 13 Simulation cloud map of the magnetic flux with the anti-magnetic member according to the present invention.

[0033] In the figure: 1. Dual-channel sound generating structural member; 2. Upper speaker; 3. Lower speaker; 4. Side air holes; 5. Middle hole; 6. Lower speaker mounting groove; 7. Wiring port; 8. Speaker PCB avoidance groove; 9. Upper speaker mounting groove; 10. Sound generating device; 11. Sound generating channel; 12. Anti-magnetic member; 13. Anti-magnetic member mounting groove; 201. Basket; 202. Magnet; 203. Washer; 204. Voice coil assembly. Detailed implementation manners

[0034] Embodiment 1

[0035] Please refer to Figures 1 - 5 , a speaker sound generating structure with dual-channel sound generation, including a dual-channel sound generating structural member 1, an upper speaker 2 is installed on the top of the dual-channel sound generating structural member 1, a lower speaker 3 is installed on the bottom of the dual-channel sound generating structural member 1, and the upper speaker 2 and the lower speaker 3 are located on the same central axis.

[0036] Furthermore, a middle hole 5 is opened at the center inside the dual-channel sound generating structural member 1, and the middle hole 5 is located on the side opposite to the upper speaker 2 and the lower speaker 3.

[0037] Further, side air holes 4 are formed on the surface of the dual-channel sound generating structural member 1, and the side air holes 4 communicate with the middle hole 5.

[0038] Further, the upper speaker 2 and the lower speaker 3 are one of a high-frequency speaker, a low-frequency speaker or a full-frequency speaker.

[0039] Further, an upper speaker mounting groove 9 for cooperating with the upper speaker 2 is formed at the top of the dual-channel sound generating structural member 1, and the upper speaker 2 is fixedly mounted in the inner cavity of the upper speaker mounting groove 9.

[0040] Further, a lower speaker mounting groove 6 for cooperating with the lower speaker 3 is formed at the bottom of the dual-channel sound generating structural member 1, and the lower speaker 3 is fixedly mounted in the inner cavity of the lower speaker mounting groove 6.

[0041] Further, a speaker PCB avoiding groove 8 is formed in the inner cavity of the dual-channel sound generating structural member 1, and a wiring port 7 communicating with the speaker PCB avoiding groove 8 is formed on the surface of the dual-channel sound generating structural member 1.

[0042] Further, the positive electrodes of the upper speaker 2 and the lower speaker 3 are electrically connected to the positive electrode of the audio system, and the negative electrodes of the upper speaker 2 and the lower speaker 3 are electrically connected to the negative electrode of the audio system.

[0043] In the above speaker sound generating structure with dual channels, the upper speaker 2 and the lower speaker 3 are also full-frequency speakers or bass speakers.

[0044] Embodiment 2

[0045] Please refer to Figures 1 - 5 , a sound generating method of a speaker sound generating structure with dual channels, comprising the following steps:

[0046] S1. After the upper speaker 2 and the lower speaker 3 receive an audio signal, they work simultaneously. When the upper speaker 2 and the lower speaker 3 are also full-frequency speakers or bass speakers, the upper speaker 2 emits sound to the outside, and the lower speaker 3 emits sound to the outside together with the upper speaker 2 through the middle hole 5 and the side air holes 4, forming sound superposition and reducing the demand for sound power.

[0047] S2. When the upper speaker 2 is a low-frequency speaker and the lower speaker 3 is a high-frequency speaker, the space of the upper speaker mounting groove 9 is reduced, leaving the side as the sound outlet hole of the lower speaker 3, forming a sound generating channel 11, and the middle hole 5 is blocked by the upper speaker 2, so that the upper speaker 2 and the lower speaker 3 can cover a wider audio range and provide a more complete sound experience.

[0048] Embodiment 3

[0049] Please refer to Figures 1 - 7, based on Embodiment 1 and Embodiment 2, this embodiment provides an application method of a speaker sound - generating structure with dual - channel sound, including the following steps:

[0050] S1. Install the dual - channel sound - generating structure member 1 into the sound - generating device 10, where the sound - generating device 10 is an electronic device that can generate sound, such as an earphone, a speaker, a mobile phone, etc.

[0051] S2. During the installation process, use glue to connect the dual - channel sound - generating structure member 1 to the sound - generating device 10 to install the dual - channel sound - generating structure member 1 at the sound - generating position inside the sound - generating device 10. At this time, the sound - emitting directions of the upper speaker 2 and the lower speaker 3 face the sound - outlet hole direction of the sound - generating device 10.

[0052] S3. During the operation of the sound - generating structure, the audio signal is input into the upper speaker 2 and the lower speaker 3 through the audio system.

[0053] S4. If the upper speaker 2 and the lower speaker 3 process different frequency ranges respectively, the input audio signal is divided into corresponding frequency bands through a frequency divider, and the frequency divider is integrated on the circuit board in the speaker PCB avoidance groove 8.

[0054] S5. The positive poles of the upper speaker 2 and the lower speaker 3 are electrically connected to the positive pole of the audio system, and the negative poles are electrically connected to the negative pole of the audio system. The upper speaker 2 and the lower speaker 3 both directly obtain the amplified electrical signals corresponding to their frequency ranges from the audio system.

[0055] S6. When the upper speaker 2 receives the electrical signal within its designed frequency range, the voice coil of the upper speaker 2 moves in the magnetic field, causing the diaphragm to vibrate, thereby emitting sound of the corresponding frequency. Similarly, when the lower speaker 3 receives the electrical signal suitable for its own frequency range, it operates in the same way, thereby emitting sound of the corresponding frequency.

[0056] Embodiment 4

[0057] Please refer to Figure 8 , this embodiment provides a speaker sound - generating structure with dual - channel sound, including a dual - channel sound - generating structure member 1. An upper speaker 2 is installed on the top of the dual - channel sound - generating structure member 1, and a lower speaker 3 is installed on the bottom of the dual - channel sound - generating structure member 1.

[0058] Further, an upper - speaker installation groove 9 is formed at the top of the dual - channel sound - generating structure member 1, and the upper speaker 2 is installed in the upper - speaker installation groove 9.

[0059] Further, an installation groove for cooperating with the lower speaker 3 is provided at the bottom of the dual - channel sound - generating structure member 1.

[0060] Further, side air holes 4 and a wiring port 7 are formed on the surface of the dual-channel sound generating structural member 1, and a speaker PCB avoiding groove 8 communicating with the wiring port 7 is arranged inside the dual-channel sound generating structural member 1.

[0061] Further, in the above speaker sound generating structure with dual-channel sound generation, the upper speaker 2 is a low-frequency speaker, and the lower speaker 3 is a high-frequency speaker.

[0062] Further, at this time, the space of the upper speaker mounting groove 9 is reduced, and the side is left as the sound outlet hole of the lower speaker 3 to form a sound generating channel 11. The middle hole 5 is blocked by the upper speaker 2, so that the upper speaker 2 and the lower speaker 3 can cover a wider audio range and provide a more complete sound experience.

[0063] Further, different meshes of mesh cloth are pasted inside the side air holes 4 for adjustment, that is, the function of the side air holes 4 becomes the air leakage holes of the lower speaker 3, and the functions of the other structural members remain unchanged.

[0064] Embodiment 5

[0065] Please refer to Figures 9 - 13 , based on Embodiment 1, this embodiment provides a speaker sound generating structure with dual-channel sound generation with anti-magnetism. The difference from the embodiment is that an anti-magnetic member 12 is installed in the inner cavity of the dual-channel sound generating structural member 1. The anti-magnetic member 12 is located on the side opposite to the upper speaker 2 and the lower speaker 3. An anti-magnetic member mounting groove 13 for cooperating with the anti-magnetic member 12 is formed inside the dual-channel sound generating structural member 1, and the anti-magnetic member 12 is fixedly installed in the inner cavity of the anti-magnetic member mounting groove 13.

[0066] Furthermore, after installing the anti-magnetic component 12 inside the anti-magnetic component installation groove 13, the magnetic field efficiency of the speaker can be effectively improved, making the magnetic field distribution of the speaker more uniform, thereby reducing distortion. The diaphragm directions of the upper speaker 2 and the lower speaker 3 are downward, and the magnet magnetization direction is opposite to that of the anti-magnetic component 12. The air pushed by the diaphragm of the upper speaker 2 is discharged from the middle hole 5 and the side air holes 4. The side air holes 4 play a role in adjusting the damping of the speaker system. The air in the middle hole 5 can push the diaphragm of the lower speaker 3 to move together, making the lower speaker 3 easier to drive. To a certain extent, the power demand is reduced when the frequency emits sound. The anti-magnetic component 12 plays a role in further compressing the magnetic field scattered outside the speaker, which can effectively reduce magnetic leakage. Since the polarity is opposite to that of the magnets of the upper speaker 2 and the lower speaker 3, according to the principle of like poles repelling and opposite poles attracting, the magnetic induction lines of the lower speaker 3 and the upper speaker 2 will be bent back due to the repulsion of like poles. At this time, the magnetic field intensity of the lower speaker 3 and the upper speaker 2 will be enhanced. At the same time, since the magnetic field intensity at the edge is enhanced, the original magnetic field will also become more uniform. According to the Ampere force formula F = BLI, the Ampere force received by the speaker is enhanced after the magnetic field intensity is enhanced, thereby improving the efficiency of the speaker. The degree of magnetic field uniformity is an important indicator for measuring the distortion of the speaker. When the magnetic field is non-uniform, the voice coil will be subjected to more non-linear forces when moving in the magnetic field, resulting in distortion. After adding anti-magnetic, the degree of magnetic field uniformity is improved, thereby improving the distortion of the speaker.

[0067] Furthermore, the upper speaker 2 includes a chassis 201, a magnet 202, a washer 203, and a voice coil assembly 204. The chassis 201 is installed inside the dual-channel sound generating structure member 1. The magnet 202 is installed inside the chassis 201. The washer 203 is installed on the magnet 202. The voice coil assembly 204 is installed on the washer 203.

[0068] Furthermore, the structure of the lower speaker 3 is the same as that of the upper speaker 2.

[0069] Furthermore, during the operation of the upper speaker 2, the chassis 201 of the speaker is the framework of the speaker, providing structural support and fixing other components. The magnet 202 is installed inside the chassis 201. The magnet 202 is used to generate a constant magnetic field. The washer 203 and the magnet 202 together form a closed magnetic circuit system. The voice coil assembly 204 is in the magnetic field generated by the magnet 202 and the washer 203. When the audio signal current passes through the voice coil assembly 204, according to the principle of electromagnetic induction, the voice coil assembly 204 will be subjected to a force in the magnetic field and work.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A loudspeaker sound - generating structure with dual - channel sound output, comprising a dual - channel sound - generating structure member (1), characterized in that: An upper speaker (2) is installed on the top of the dual-channel sound-generating structural member (1), a lower speaker (3) is installed on the bottom of the dual-channel sound-generating structural member (1), and the upper speaker (2) and the lower speaker (3) are located on the same central axis.

2. The sound generating structure of a loudspeaker with dual-channel sound generation according to claim 1, wherein: A central hole (5) is opened at the center inside the dual-channel sound-generating structural member (1), and the central hole (5) is located on the side opposite to the upper speaker (2) and the lower speaker (3).

3. The speaker sound generating structure with dual-channel sound generation according to claim 2, wherein: Side air holes (4) are opened on the surface of the dual-channel sound-generating structural member (1), and the side air holes (4) are communicated with the central hole (5).

4. The speaker sound generating structure with dual-channel sound generation according to claim 3, wherein: The upper speaker (2) and the lower speaker (3) are one of a high-frequency speaker, a low-frequency speaker or a full-frequency speaker.

5. A speaker sound generating structure with dual-channel sound generation, characterized in that: An upper speaker mounting groove (9) for cooperating with the upper speaker (2) is opened on the top of the dual-channel sound-generating structural member (1), and the upper speaker (2) is fixedly installed in the inner cavity of the upper speaker mounting groove (9).

6. The speaker sound generating structure with dual-channel sound generation according to claim 5, characterized in that: A lower speaker mounting groove (6) for cooperating with the lower speaker (3) is opened on the bottom of the dual-channel sound-generating structural member (1), and the lower speaker (3) is fixedly installed in the inner cavity of the lower speaker mounting groove (6).

7. The speaker sound generating structure with dual-channel sound generation according to claim 6, wherein: A speaker PCB avoidance groove (8) is opened in the inner cavity of the dual-channel sound-generating structural member (1), and a wiring port (7) communicated with the speaker PCB avoidance groove (8) is opened on the surface of the dual-channel sound-generating structural member (1).

8. The sound generating structure of a loudspeaker with dual-channel sound generation according to claim 7, characterized in that: The positive poles of the upper speaker (2) and the lower speaker (3) are electrically connected to the positive pole of the audio system, and the negative poles of the upper speaker (2) and the lower speaker (3) are electrically connected to the negative pole of the audio system.

9. The speaker sound generating structure with dual-channel sound generation according to claim 8, characterized in that: An anti-magnetic member (12) is installed in the inner cavity of the dual-channel sound-generating structural member (1), the anti-magnetic member (12) is located on the side opposite to the upper speaker (2) and the lower speaker (3), an anti-magnetic member mounting groove (13) for cooperating with the anti-magnetic member (12) is opened inside the dual-channel sound-generating structural member (1), and the anti-magnetic member (12) is fixedly installed in the inner cavity of the anti-magnetic member mounting groove (13).

10. A sound generation method for a sound generation structure of a two-channel speaker, applicable to the sound generation structure of a two-channel speaker described in claim 9 above, characterized in that, Including the following steps: S1. After the upper speaker (2) and the lower speaker (3) receive an audio signal, they work simultaneously. When the upper speaker (2) and the lower speaker (3) are also full-frequency speakers or bass speakers, the upper speaker (2) emits sound to the outside, and the lower speaker (3) emits sound to the outside together with the upper speaker (2) through the central hole (5) and the side air holes (4), forming sound superposition and reducing the demand for sound power. S2. When the upper speaker (2) is a low-frequency speaker and the lower speaker (3) is a high-frequency speaker, the space of the upper speaker mounting groove (9) is reduced, leaving the side as the sound outlet hole of the lower speaker (3), forming a sound channel (11), and the central hole (5) is blocked by the upper speaker (2), so that the upper speaker (2) and the lower speaker (3) can cover a wider audio range and provide a more complete sound experience. S3. After installing the anti-magnetic component (12) inside the anti-magnetic component installation groove (13), the magnetic field efficiency of the speaker can be effectively improved, making the magnetic field distribution of the speaker more uniform, thereby reducing distortion. The diaphragm directions of the upper speaker (2) and the lower speaker (3) are downward, and the magnet magnetization direction is opposite to that of the anti-magnetic component (12). The air pushed by the diaphragm of the upper speaker (2) is discharged from the middle hole (5) and the side air holes (4). The side air holes (4) play a role in adjusting the damping of the speaker system. The air in the middle hole (5) can push the diaphragm of the lower speaker (3) to move together, making the lower speaker (3) easier to drive, and to a certain extent, reducing the power demand during frequency sounding. The anti-magnetic component (12) plays a role in further compressing the magnetic field scattered outside the speaker, and can effectively reduce magnetic leakage. Since its polarity is opposite to the magnet polarities of the upper speaker (2) and the lower speaker (3), according to the principle of like poles repelling and opposite poles attracting, the magnetic induction lines of the lower speaker (3) and the upper speaker (2) will be bent back due to the repulsion of like poles. At this time, the magnetic field intensities of the lower speaker (3) and the upper speaker (2) will be enhanced. At the same time, since the magnetic field intensity at the edge is enhanced, the original magnetic field will also become more uniform. According to the Ampere force formula F = BLI, the Ampere force received by the speaker is enhanced after the magnetic field intensity is enhanced, thereby improving the efficiency of the speaker. The degree of magnetic field uniformity is an important indicator for measuring the distortion of the speaker. When the magnetic field is non-uniform, the voice coil will be subjected to more non-linear forces during movement in the magnetic field, resulting in distortion. After adding anti-magnetic, the degree of magnetic field uniformity is improved, thereby improving the distortion of the speaker.

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