Sound production module and electronic equipment
The sound module addresses airflow exchange issues in dual speaker systems by using asymmetric sound outlets to control Q value and loudness, improving sound quality and privacy in communication devices.
Patent Information
- Application Number
- CN202420649796.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-29
AI Technical Summary
Dual speaker systems in communication devices struggle to control airflow exchange between speakers, leading to an uncontrolled Q value range and reduced loudness, which affects privacy and sound quality.
The sound module design features asymmetric sound outlets on adjacent and distal surfaces of sound-emitting units, with the distal surface having a larger area than the adjacent surface, allowing for controlled airflow exchange and adjustment of the Q value within a reasonable range of 0.707-1.7, while maintaining loudness.
This design effectively reduces noise interference and ensures adequate loudness, enhancing user experience by controlling airflow exchange and maintaining sound quality in both speaker and private call modes.
Smart Images
Figure CN222192548U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electroacoustic conversion, and specifically relates to a sound module and an electronic device. Background Art
[0002] As we all know, the sound leakage of communication electronic devices during calls can cause the user's call content to be heard by other people around, which in turn causes the user's privacy to be leaked and endangers personal information security. To solve the problem of sound leakage during calls, the speaker in the communication electronic device can be designed with two sound systems. The sound waves generated by these two sound systems have opposite phases. The two sound waves have the same energy and opposite phases, and the energy cancels out, achieving the function of far-field sound leakage prevention.
[0003] In the related art, the design of speaker sound leakage prevention generally includes two speakers set back to back, double-sided speakers or multiple single-sided speakers side by side; however, the thickness of the speakers set back to back is relatively large, which limits their application; it is difficult to differentiate the design of double-sided speakers, and a bad vibration unit will lead to overall bad performance; when multiple single-sided speakers are placed side by side to realize the function of private calls, that is, the receiver mode, the vibration directions of the two speaker vibration systems are opposite, and the airflow will be exchanged between the two speakers. The sound holes on the adjacent sides of the two speakers have the greatest effect on the airflow exchange. However, the current dual-speaker system set side by side cannot effectively control the size of the airflow exchange between the two adjacent speakers, resulting in the Q value of the product cannot be controlled within the reasonable range of 0.707-1.7, and the loudness of the speaker module is relatively low, which affects actual use.
[0004] Therefore, in view of the above shortcomings, the present utility model is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a sound module and an electronic device to solve the problem in the prior art that the dual speaker system cannot effectively control the size of the airflow exchange between the two speakers, resulting in the Q value of the product cannot be controlled within a reasonable range of 0..707-1.7.
[0006] The first aspect of the utility model provides a sound module, comprising a shell having a receiving cavity and two sound-emitting units arranged side by side and received in the receiving cavity;
[0007] Wherein, each of the sound-emitting units has an outer shell and a sound cavity arranged in the outer shell, and each of the sound-emitting units has an adjacent surface adjacent to the adjacent sound-emitting unit and a distal surface away from the adjacent sound-emitting unit, and the adjacent surface and / or the distal surface are provided with a sound outlet hole connected to the sound cavity, and the sound outlet area of the distal surface of each sound-emitting unit is larger than the sound outlet area of the adjacent surface.
[0008] The sound module proposed in the utility model may also have the following additional technical features:
[0009] In a specific implementation manner of the present invention, the ratio of the area of the sound outlet hole of the remote surface to the area of the sound outlet hole of the adjacent surface is (1.5-8):1.
[0010] In a specific implementation manner of the present invention, the ratio of the area of the sound outlet hole of the remote surface to the area of the sound outlet hole of the adjacent surface is 2:1, 3:1 or 6:1.
[0011] In a specific implementation manner of the present invention, at least one of the sound-emitting units is provided with the sound outlet hole only on the remote surface.
[0012] In a specific implementation manner of the present invention, the two sound-emitting units are both provided with the sound outlet holes only on the remote surfaces thereof, and the remote surfaces of the two sound-emitting units have the same sound outlet areas.
[0013] In a specific embodiment of the present invention, the sound module has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two sound units are the same. In the second working mode, the vibration directions of the vibration systems of the two sound units are opposite.
[0014] The second aspect of the utility model provides a sound module, including a shell having a receiving cavity and three sound-emitting monomers arranged side by side and received in the receiving cavity, wherein the three sound-emitting monomers include a first monomer located at both ends and a second monomer located in the middle, and each of the sound-emitting monomers has an outer shell and a sound cavity provided in the outer shell.
[0015] Among them, each of the sound-emitting units includes a first side wall and a second side wall arranged opposite to each other, the first side wall and the second side wall of two adjacent sound-emitting units are opposite to each other, the first side wall of the first unit is located on the side of the first unit away from the second unit, the first side wall and the second side wall of the second unit are both provided with a sound outlet hole connected to the sound cavity thereof, at least the first side wall of the first unit is provided with a sound outlet hole connected to the sound cavity thereof and the sound outlet area of the first side wall of each of the first units is larger than the sound outlet area of the second side wall.
[0016] In a specific embodiment of the present invention, the first side wall and the second side wall of at least one of the first monomers are both provided with the sound outlet hole;
[0017] Alternatively, at least one of the first units is provided with the sound outlet hole only on the first side wall.
[0018] In a specific embodiment of the utility model, the sound module has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two first monomers and the second monomers are the same. In the second working mode, the vibration direction of the vibration system of the second monomer is opposite to the vibration direction of the vibration systems of the two first monomers.
[0019] A third aspect of the present invention provides an electronic device, characterized in that it comprises any one of the above-mentioned sound modules.
[0020] The sound module proposed by the utility model is designed with two ultra-thin sound units placed side by side. While reducing the thickness of the sound module, realizing the external speaker function, the private call function and the differentiated design of the two sound units, by setting the sound output area of the far side of each sound unit larger than the sound output area of the adjacent side, that is, the asymmetric design of the sound holes on both sides of the sound unit, the size of the airflow exchange between the two sound units can be controlled, so that the product Q value of the sound module can be more simply adjusted, so that the product Q value is controlled within a reasonable range of 0.707-17, to ensure that the whole machine does not generate noise in the receiver mode, and at the same time the loudness fully meets the use requirements, thereby ensuring the experience of the end user. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 This is a decomposition diagram of the sound module of an embodiment of the utility model;
[0023] Figure 2 It is a schematic diagram of the arrangement of the sound-emitting units in the sound-emitting module of the embodiment of the utility model;
[0024] Figure 3 for Figure 1 A cross-sectional view of the middle sound module;
[0025] Figure 4 A schematic diagram of the structure of a sound-emitting unit in one embodiment;
[0026] Figure 5 is a schematic diagram of the structure of a sound-emitting unit in another embodiment;
[0027] Figure 6 This is a cross-sectional view of a sound module in another embodiment of the present invention.
[0028] Description of reference numerals:
[0029] 100-sound module;
[0030] 10-shell, 11-first shell, 12-second shell, 13-first sound hole, 14-second sound hole, 15-front cavity, 16-rear cavity;
[0031] 20-sound-emitting unit, 21-sound-exit hole, 22-adjacent surface, 23-distal surface. DETAILED DESCRIPTION
[0032] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0036] The sound module 100 provided in the embodiment of the utility model is mainly used in electronic equipment.
[0037] Reference Figure 1-6 As shown, an embodiment of the utility model provides a sound module 100, which includes a shell 10 formed with a receiving cavity and two sound units 20 arranged side by side and received in the receiving cavity; wherein each sound unit 20 has an outer shell and a sound cavity arranged in the outer shell, and each sound unit 20 has an adjacent surface 22 adjacent to the adjacent sound unit 20 and a distant surface 23 away from the adjacent sound unit 20, the adjacent surface 22 and / or the distant surface 23 are provided with a sound outlet hole 21 connected to the sound cavity, and the sound outlet area of the distant surface 23 of each sound unit 20 is larger than the sound outlet area of the adjacent surface 22.
[0038] Specifically, the housing 10 may include a first housing 11 and a second housing 12 that cooperate with each other to form a receiving cavity, wherein the first housing 11 is formed with a first sound hole 13 and a second sound hole 14. Two sounding monomers 20 are arranged side by side in the receiving cavity, and each sounding monomer 20 is enclosed with the first housing 11 to form a front cavity 15, and a rear cavity 16 is formed between the two sounding monomers 20 and the housing 10, wherein one front cavity 15 is connected to the first sound hole 13, and the other front cavity 15 is connected to the second sound hole 14, so that the sound of the sounding monomer 20 can be transmitted to the outside of the sound module 100 through the front cavity 15.
[0039] The side of each sound-emitting unit 20 adjacent to the adjacent sound-emitting unit 20 is a neighboring surface 22, and the side away from the adjacent sound-emitting unit 20 is a away surface 23, wherein the adjacent surface 22 and / or the away surface 23 are provided with a sound outlet hole 21 connected to the sound cavity. That is to say, the sound outlet hole 21 can be set only on the adjacent surface 22, or only on the away surface 23, or on both the adjacent surface 22 and the away surface 23. The sound waves in the sound cavity can enter the back cavity 16 through the sound outlet hole 21. By arranging sound outlet holes 21 connected to the sound cavity on the adjacent surface 22 and / or the distal surface 23 of the sound-emitting unit 20, and making the sound output area of the distal surface 23 of each sound-emitting unit 20 larger than the sound output area of the adjacent surface 22, when the sound-emitting unit 20 vibrates, the air flow rate flowing out of the sound cavity through the distal surface 23 is larger than the air flow rate flowing out through the adjacent surface 22, thereby reducing the exchange of gas flow between adjacent sound-emitting units 20 and reducing the influence on the Q value of the sound component, thereby achieving the purpose of making the sound module 100 reach a suitable Q value range of 0.707-1.7, thereby reducing the noise generated by the sound module and ensuring that the loudness of the sound module meets the usage requirements.
[0040] The sound module 100 proposed in the utility model reduces the thickness of the sound module 100 by designing two sound units 20 placed side by side, realizes the external speaker function, the private call function and the differentiated design of the two sound units 20, and at the same time, by setting the sound output area of the far side of each sound unit larger than the sound output area of the adjacent side, that is, the asymmetric design of the sound holes 21 on both sides of the sound unit 20, the size of the airflow exchange between the two sound units can be controlled, and the product Q value of the sound module can be adjusted more simply, so that the product Q value is controlled within a reasonable range of 0.707-17, ensuring that the whole machine does not generate noise in the receiver mode, and the loudness can meet the use requirements, thereby improving the experience of the end user.
[0041] In a specific embodiment of the present invention, the sound output area of the adjacent surface 22 of the sound-emitting monomer 20 is smaller than the area of the sound output hole 21 of the distant surface 23 of the sound-emitting monomer 20. In this way, the gas flow rate flowing out through the sound output hole 21 at the adjacent surfaces 22 of two adjacent sound-emitting monomers 20 can be reduced at the same time, thereby reducing the mutual interference between the two, which is conducive to reducing the impact on the Q value of the sound-emitting component, and achieving the purpose of achieving a suitable Q value range of 0.707-1.7 by adjusting the area of the sound output hole 21 of the adjacent surface 22 of the sound-emitting monomer 20.
[0042] In a specific embodiment of the present invention, the ratio of the area of the sound outlet hole 21 away from the surface 23 to the area of the sound outlet hole 21 adjacent to the surface 22 is (1.5-8): 1. Optionally, the ratio of the area of the sound outlet hole 21 away from the surface 23 to the area of the sound outlet hole 21 adjacent to the surface 22 is 2:1, 3:1 or 6:1.
[0043] Specifically, the ratio of the area of the sound hole 21 away from the surface 23 to the area of the sound hole 21 adjacent to the surface 22 can be simulated and obtained according to the Q value range of the sound module 100, which is specifically affected by the material specifications and dimensions of the sound module 100.
[0044] Of course, in addition to the above specific embodiments, the ratio of the area of the sound outlet hole 21 away from the surface 23 to the area of the sound outlet hole 21 adjacent to the surface 22 may also be other ratios within (1.5-8):1.
[0045] In a specific embodiment of the present invention, at least one sounding unit 20 is provided with a sound outlet 21 only on the away surface 23. Since two adjacent sounding units 20 are provided with a sound outlet 21 only on the away surface 23 and no sound outlet 21 is provided on the adjacent surface 22, the airflows of the two adjacent sounding units 20 will not be exchanged when vibrating, and will not interfere with each other, which is conducive to controlling the Q value of the sound module 100 within a reasonable range of 0.707-17, and improving the sound effect of the sound module.
[0046] In one embodiment of the present invention, the two sound-emitting monomers 20 are only provided with sound outlet holes 21 on their remote surfaces 23, and the remote surfaces 23 of the two sound-emitting monomers 20 have the same sound outlet area. Thus, the two sound-emitting monomers 20 arranged side by side are completely symmetrically arranged, and the airflows between the two have little mutual interference, thereby further improving the sound effect of the sound module 100.
[0047] In a specific embodiment of the present invention, the sound module 100 has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two sound units 20 are the same. In the second working mode, the vibration directions of the vibration systems of the two sound units 20 are opposite.
[0048] Specifically, in the first working mode, since the vibration directions of the vibration systems of the two sound-emitting units 20 are the same, the sound waves transmitted outwardly by the sound-emitting units 20 through the first sound hole 13 and the second sound hole 14 can be superimposed on each other, that is, the intensity of the sound waves is increased. Therefore, it can be used in the sound external speaker mode to enhance the sound effect transmitted to the user's ears.
[0049] In the second working mode, since the vibration directions of the vibration systems of the two sound-emitting units 20 are opposite, that is, the sound waves emitted by the two sound-emitting units 20 form an acoustic dipole, the sound waves transmitted outwardly from the sound-emitting units 20 through the first sound hole 13 and the second sound hole 14 can cancel each other out in the far field (for example, a position more than 20 cm away from the terminal), thereby reducing the transmission range of the sound waves, thereby preventing the user's conversation content from being heard by other people around. Therefore, it can be used in the receiver mode to achieve the effect of protecting privacy.
[0050] The embodiment of the utility model further proposes a sound module 100, comprising a shell 10 formed with a receiving cavity and three sounding units 20 arranged side by side and received in the receiving cavity, wherein the three sounding units 20 include a first unit located at both ends and a second unit located in the middle, and each sounding unit 20 has an outer shell and a sound cavity arranged in the outer shell; wherein each sounding unit 20 includes a first side wall and a second side wall arranged opposite to each other, the first side wall and the second side wall of two adjacent sounding units 20 are opposite to each other, the first side wall of the first unit is located on the side of the first unit away from the second unit, the first side wall and the second side wall of the second unit are both provided with a sound outlet hole 21 connected to its sound cavity, at least the first side wall of the first unit is provided with a sound outlet hole 21 connected to its sound cavity and the sound outlet area of the first side wall of each first unit is larger than the sound outlet area of the second side wall.
[0051] Specifically, since the first side wall of the first monomer is located on the side of the first monomer away from the second monomer and the sound output area is larger than the sound output area of the second side wall, the gas flow rate flowing out through the second side wall when the first monomer vibrates can be reduced, thereby reducing the exchange of gas flow rate between the two adjacent sounding monomers 20, and reducing the influence on the Q value of the sounding component, thereby achieving the purpose of achieving a suitable Q value range of 0.707-1.7 by adjusting the sound output area of the first side wall and the second side wall of the sounding monomer 20.
[0052] In a specific embodiment of the present invention, both the first side wall and the second side wall of at least one first unit are provided with sound outlet holes 21; or, at least one first unit is provided with the sound outlet hole 21 only on the first side wall.
[0053] The above two methods are both used for the side wall structure setting of the first monomer, and the specific method can be selected according to the needs. For example, the first side wall and the second side wall of the two first monomers are both provided with sound holes 21, or, the first side wall of one of the first monomers is provided with a sound hole 21, while the second side wall is not provided with a sound hole 21; or, both first monomers are only provided with a sound hole 21 on the first side wall.
[0054] In a specific embodiment of the present invention, the sound module 100 has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two first monomers and the second monomers are the same. In the second working mode, the vibration direction of the vibration system of the second monomer is opposite to the vibration direction of the vibration systems of the two first monomers.
[0055] Specifically, in the first working mode, since the vibration directions of the vibration systems of the first unit and the second unit are the same, the sound waves transmitted outwardly by the sound-emitting unit 20 through the first sound hole 13 and the second sound hole 14 can be superimposed on each other, that is, the intensity of the sound waves is increased. Therefore, it can be used in the sound external projection mode to enhance the sound effect transmitted to the user's ears.
[0056] In the second working mode, since the vibration directions of the vibration systems of the first monomer and the second monomer are opposite, that is, the sound waves emitted by the two first monomers form an acoustic dipole with the sound waves emitted by the second monomer, the sound waves transmitted outward by the sound-emitting monomer 20 through the first sound hole 13 and the second sound hole 14 can cancel each other out in the far field (for example, a position more than 20 cm away from the terminal), thereby reducing the transmission range of the sound waves, thereby effectively preventing the user's conversation content from being heard by other people around. Therefore, it can be used in the receiver mode to achieve the effect of protecting privacy.
[0057] In some embodiments, the sound unit 20 includes a frame and a vibration system and a magnetic circuit system connected to the frame. The vibration system includes a diaphragm assembly fixed to the frame and a voice coil connected to the diaphragm assembly at one end. The magnetic circuit system has a magnetic gap, and the other end of the voice coil is inserted into the magnetic gap. The diaphragm assembly, the frame and the magnetic circuit system cooperate to define a sound cavity, and the frame and part of the magnetic circuit system form an outer shell.
[0058] In some embodiments, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion of the magnetic yoke, the central magnetic portion and the side magnetic portion are spaced apart to form a magnetic gap, the magnetic yoke includes a main body portion and a flange portion which is arranged at both ends of the main body portion and is bent and extended in a direction close to the diaphragm assembly, the central magnetic portion and the side magnetic portion are arranged on the main body portion, the flange portion is located on a side of the side magnetic portion away from the central magnetic portion, and the flange portion is provided with a sound outlet hole 21.
[0059] In some embodiments, the sound-emitting unit 20 also includes a breathable spacer, and the frame, the breathable spacer and a part of the magnetic circuit system form an outer shell. The breathable spacer is snap-fitted with the magnetic circuit system, and the breathable spacer is provided with a sound outlet hole 21.
[0060] The third aspect of the present invention proposes an electronic device, characterized in that it includes a sound module 100 as described in any one of the above. Specifically, the electronic device in this embodiment can be a mobile phone, a tablet or a smart wearable device. And the structure of the sound module 100 in the electronic device is specifically referred to the above embodiment. Since the electronic device in the utility model has all the technical features of the above embodiment, it also has at least the beneficial effects thereof.
[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A sound module, characterized in that: It comprises a shell having a receiving cavity and two sound-emitting monomers arranged side by side and received in the receiving cavity; Wherein, each of the sound-emitting units has an outer shell and a sound cavity arranged in the outer shell, and each of the sound-emitting units has an adjacent surface adjacent to the adjacent sound-emitting unit and a distal surface away from the adjacent sound-emitting unit, and the adjacent surface and / or the distal surface are provided with a sound outlet hole connected to the sound cavity, and the sound outlet area of the distal surface of each sound-emitting unit is larger than the sound outlet area of the adjacent surface.
2. The sound module according to claim 1, characterized in that: The ratio of the area of the sound outlet hole of the distal surface to the area of the sound outlet hole of the adjacent surface is (1.5-8):
1.
3. The sound module according to claim 2, characterized in that: The ratio of the area of the sound outlet hole of the remote surface to the area of the sound outlet hole of the adjacent surface is 2:1, 3:1 or 6:
1.
4. The sound module according to claim 1, characterized in that: At least one of the sound-emitting units is provided with the sound outlet hole only on the remote surface.
5. The sound module according to claim 4, characterized in that: The two sound-emitting monomers are both provided with the sound outlet holes only on the remote surfaces thereof, and the sound outlet areas of the remote surfaces of the two sound-emitting monomers are the same.
6. The sound module according to any one of claims 1 to 5, characterized in that: The sound module has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two sound units are the same. In the second working mode, the vibration directions of the vibration systems of the two sound units are opposite.
7. A sound module, characterized in that: The invention comprises a shell having a receiving cavity and three sound-emitting monomers arranged side by side and received in the receiving cavity, wherein the three sound-emitting monomers comprise a first monomer located at two ends and a second monomer located in the middle, and each of the sound-emitting monomers comprises an outer shell and a sound cavity arranged in the outer shell. Among them, each of the sound-emitting units includes a first side wall and a second side wall arranged opposite to each other, the first side wall and the second side wall of two adjacent sound-emitting units are opposite to each other, the first side wall of the first unit is located on the side of the first unit away from the second unit, the first side wall and the second side wall of the second unit are both provided with a sound outlet hole connected to the sound cavity thereof, at least the first side wall of the first unit is provided with a sound outlet hole connected to the sound cavity thereof and the sound outlet area of the first side wall of each of the first units is larger than the sound outlet area of the second side wall.
8. The sound module according to claim 7, characterized in that: The first side wall and the second side wall of at least one of the first monomers are both provided with the sound outlet hole; Alternatively, at least one of the first units is provided with the sound outlet hole only on the first side wall.
9. The sound module according to claim 7 or 8, characterized in that: The sound module has a first working mode and a second working mode. In the first working mode, the vibration directions of the vibration systems of the two first monomers and the second monomers are the same. In the second working mode, the vibration direction of the vibration system of the second monomer is opposite to the vibration direction of the vibration systems of the two first monomers.
10. An electronic device, characterized in that: A sound module comprising any one of claims 1-9.