Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, and belongs to the field of acoustics. The sound production device comprises a shell and a sound production unit arranged in the shell. The sound production unit divides the shell into a front sound cavity and a rear sound cavity. A molecular sieve powder particle is arranged in the rear sound cavity. The molecular sieve powder particle and the sound production unit are isolated by a breathable isolation piece. The average particle size of the molecular sieve powder particle is greater than 20 microns and less than 50 microns. The mass ratio of silicon to aluminum of the molecular sieve powder particle is less than 200. The crystallinity of the molecular sieve powder particle is greater than or equal to 90%. The anti-crushing force of the molecular sieve powder particle is greater than 0.01 N / particle and less than 0.5 N / particle. The sound production device can improve the crystal structure strength of the molecular sieve powder particle, so that the molecular sieve powder particle is not easy to break and has good sound absorption performance.

Description

Technical Field

[0001] This invention relates to the field of acoustics, and more particularly to a sound-generating device and electronic device. Background Technology

[0002] In recent years, with the increasing thinness and lightness of electronic products, the space left for speakers in these products has become smaller and smaller. The rear cavity space of the speaker is severely compressed, resulting in a higher resonant frequency (F0), reduced low-frequency performance, and an impact on the user experience. Molecular sieve powder particles can be filled into the rear acoustic cavity. The porous structure inside the molecular sieve powder particles allows for rapid adsorption and desorption of gas in the rear cavity, virtually increasing the acoustic resonant space of the speaker's rear cavity. This reduces the speaker's F0 and improves low-frequency sensitivity.

[0003] In related technologies, the particle size of molecular sieve powder is usually 1-2μm. The small particle size results in poor crystal structure strength of molecular sieve powder, making it easy to break and affecting the sound absorption effect in loudspeakers. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and electronic device, which aims to solve the technical problem that the molecular sieve powder has low crystal structure strength, is easily broken, and thus has poor sound absorption effect.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, comprising a housing and a sound-generating unit disposed within the housing. The sound-generating unit divides the housing into a front sound cavity and a rear sound cavity. Molecular sieve particles are disposed within the rear sound cavity. The molecular sieve particles and the sound-generating unit are separated by a breathable insulating element. The average particle size of the molecular sieve particles is greater than 20 μm and less than 50 μm. The silicon-to-aluminum mass ratio of the molecular sieve particles is less than 200. The crystallinity of the molecular sieve particles is ≥90%. The crushing resistance of the molecular sieve particles is greater than 0.01 N / particle and less than 0.5 N / particle.

[0006] In one embodiment, the density of the molecular sieve powder is 0.5-1.5 g / ml.

[0007] In one embodiment, the specific surface area of ​​the molecular sieve powder is greater than 120 m². 2 / g.

[0008] In one embodiment, the molecular sieve powder particles contain a microporous structure with a pore size of 0.5-0.7 nm.

[0009] In one embodiment, the molecular sieve particles further comprise a mesoporous structure with a pore size of 2-4 nm.

[0010] In one embodiment, the crystal morphology of the molecular sieve particles includes spherical or cubic shapes.

[0011] In one embodiment, the breathable insulating element includes a breathable woven mesh or a nuclear pore membrane.

[0012] In one embodiment, the breathable woven mesh fabric is made of at least one of polyethylene terephthalate, polyethylene naphthalate, polypropylene, and polyetheretherketone.

[0013] And / or, the material of the nuclear pore membrane includes at least one of polyethylene terephthalate, polycarbonate, polypropylene, polyimide, and polytetrafluoroethylene.

[0014] In one embodiment, the breathable insulating element covers the outer surface of the sound-generating monomer;

[0015] Alternatively, the breathable insulating component is disposed in the rear acoustic cavity, and the breathable insulating component cooperates with the housing to divide the rear acoustic cavity into a first cavity and a second cavity, the sound-generating unit is located in the first cavity, and the molecular sieve powder is disposed in the second cavity.

[0016] The present invention also provides an electronic device, including the sound-generating device as described above.

[0017] This invention provides a sound-generating device and an electronic device. The sound-generating device includes a housing and a sound-generating unit disposed within the housing. The sound-generating unit divides the housing into a front sound cavity and a rear sound cavity. Molecular sieve particles are disposed in the rear sound cavity. The molecular sieve particles and the sound-generating unit are separated by a breathable insulating element. The average particle size of the molecular sieve particles is greater than 20 μm and less than 50 μm. The silicon-to-aluminum mass ratio of the molecular sieve particles is less than 200. The crystallinity of the molecular sieve particles is ≥90%. The crushing resistance of the molecular sieve particles is greater than 0.01 N / particle and less than 0.5 N / particle. The average particle size of the molecular sieve powder is greater than 20 μm to prevent leakage from the vent holes of the breathable isolation component. An average particle size of less than 50 μm ensures that the molecular sieve powder has good acoustic performance. The silicon-aluminum mass ratio of the molecular sieve powder is less than 200, which allows the use of silicon source materials with relatively lower purity, saving raw material costs. In terms of crystallinity, high-crystallinity molecular sieve powder has a more regular pore structure and higher mechanical strength, and can withstand higher pressure and impact. The molecular sieve powder of the embodiment of the present invention has a crystallinity of ≥90%, which belongs to high-crystallinity molecular sieve powder. It has a crushing force of greater than 0.01 N / particle and less than 0.5 N / particle, high structural strength, is not easy to break, and has good sound absorption performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or related technologies of this drawing, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a sound-generating device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of another sound-generating device provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Sound-generating device;

[0023] 110. Housing; 111. Rear acoustic cavity; 1111. First cavity; 1112. Second cavity;

[0024] 120. Sound-generating monomer; 130. Molecular sieve powder; 140. Breathable insulating component.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This invention provides a sound-generating device 100, including a housing 110 and a sound-generating unit 120 disposed within the housing 110. The sound-generating unit 120 divides the housing 110 into a front sound cavity and a rear sound cavity 111. Molecular sieve particles 130 are disposed in the rear sound cavity 111. The molecular sieve particles 130 and the sound-generating unit 120 are separated by a breathable insulating member 140. The average particle size of the molecular sieve particles 130 is greater than 20 μm and less than 50 μm, the silicon-to-aluminum mass ratio of the molecular sieve particles 130 is less than 200, the crystallinity of the molecular sieve particles 130 is ≥90%, and the crushing resistance of the molecular sieve particles 130 is greater than 0.01 N / particle and less than 0.5 N / particle.

[0028] In this embodiment, the average particle size of the molecular sieve powder 130 is greater than 20 μm and less than 50 μm. For example, it can be 22 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 47 μm, etc. It is understood that the particle size selection of the molecular sieve powder 130 can be adapted to the breathable isolation component 140. If the average particle size of the molecular sieve powder 130 is less than 20 μm, it is easy to leak from the breathable micropores of the breathable isolation component 140, contaminating the sound-generating unit 120, affecting the operation of the sound-generating unit 120, and leading to a decrease in the acoustic performance of the sound-generating device 100. Conversely, if the average particle size is greater than 50 μm, the pore length inside the molecular sieve powder 130 is relatively long, and sound waves cannot penetrate too deeply, thus rendering the internal structural units of the molecular sieve powder 130 ineffective, resulting in a decrease in the acoustic performance of the molecular sieve powder 130 and failing to meet the acoustic application requirements in the sound-generating device 100.

[0029] In this embodiment, the silicon-to-aluminum mass ratio of the molecular sieve powder 130 is less than 200, for example, it can be 195, 190, 185, 180, 170, 160, etc. If the silicon-to-aluminum mass ratio of the molecular sieve powder 130 is greater than 200, more or purer silicon source material is required, leading to increased raw material costs. Choosing a molecular sieve powder 130 with a silicon-to-aluminum mass ratio of less than 200 allows the use of silicon source material with relatively lower purity, saving raw material costs.

[0030] In this embodiment, the crystallinity of the molecular sieve powder 130 is ≥90%, for example, it can be 90%, 92%, 94%, 96%, 98%, 99%, etc. It is understood that the crystallinity of the molecular sieve powder 130 can be tested and calculated using XRD analysis. The higher the crystallinity of the molecular sieve powder 130, the more regular its internal pore structure. High-crystallinity molecular sieve powder 130 usually also has higher mechanical strength and can withstand higher pressure and mechanical stress. A crystallinity ≥90% indicates that the molecular sieve powder 130 in this embodiment has high crystallinity, which means high mechanical strength, the ability to withstand greater pressure without easily breaking, thereby improving the working stability and service life of the molecular sieve powder 130.

[0031] In this embodiment, the crushing resistance of the molecular sieve powder 130 is greater than 0.01 N / particle and less than 0.5 N / particle. For example, it can be 0.01 N / particle, 0.05 N / particle, 0.1 N / particle, 0.2 N / particle, 0.3 N / particle, 0.4 N / particle, 0.5 N / particle, etc. It is understood that the magnitude of the crushing resistance characterizes the fragility of the molecular sieve powder 130 under pressure. If the crushing resistance is less than 0.01 N / particle, the molecular sieve powder 130 is easily crushed, resulting in poor sound absorption. The increase in crushing resistance is limited by the crystallinity and the porosity of its internal pore structure. Within the range of crushing resistance greater than 0.01 N / particle and less than 0.5 N / particle, the molecular sieve powder 130 can withstand greater pressure without crushing, maintaining its sound absorption performance.

[0032] In some feasible embodiments, the density of the molecular sieve powder 130 is 0.5-1.5 g / ml, for example, it can be 0.5 g / ml, 0.8 g / ml, 1 g / ml, 1.3 g / ml, 1.5 g / ml, etc. It is understood that the density of common molecular sieve powder is around 0.3 g / ml, with relatively poor structural strength, making it prone to fragmentation during impact and abrasion. The higher the density of the molecular sieve powder 130, the more complete and dense its crystal structure, and the higher its mechanical strength. In this embodiment, the density of the molecular sieve powder 130 is in the range of 0.5-1.5 g / ml, which is relatively high. This results in a dense internal pore structure, high overall structural strength, and the ability to withstand impact and abrasion without producing fragments.

[0033] In some feasible embodiments, the specific surface area of ​​the molecular sieve powder 130 is greater than 120 m². 2 / g, for example, can be 122m 2 / g, 150m 2 / g、180m 2 / g、200m 2 / g、220m 2 / g, etc. It is understandable that if the specific surface area of ​​molecular sieve powder of size 130 is less than 120m², then... 2 The / g indicates that it has few internal pores. Pores are crucial for the adsorption and desorption of gas molecules in the air; too few pores will affect the acoustic performance of the molecular sieve powder 130. In this embodiment, the molecular sieve powder 130 has a specific surface area greater than 120 m². 2 / g has a relatively large porous structure and good acoustic properties.

[0034] In some feasible embodiments, the molecular sieve particles 130 comprise a microporous structure with a pore size of 0.5-0.7 nm, for example, 0.5 nm, 0.55 nm, 0.6 nm, 0.65 nm, 0.7 nm, etc. It is understood that if the pore size is too large, the adsorption-desorption efficiency of the molecular sieve particles 130 for gas molecules in the air will decrease, while if the pore size is too small, it will affect the adsorption-desorption capacity for air molecules. Within the aforementioned pore size range, gas molecules in the air can be effectively adsorbed and desorbed, reducing the F0 of the sound-generating device 100 and providing good acoustic performance.

[0035] In some feasible embodiments, the molecular sieve particles 130 also include mesoporous structures with pore sizes of 2-4 nm, such as 2 nm, 2.5 nm, 3 nm, 3.5 nm, and 4 nm. It is understood that when the pore size of the mesoporous structure is less than 2 nm, it is similar to the pore size of the microporous structure and difficult to distinguish. When the pore size of the mesoporous structure is greater than 4 nm, the structural porosity of the molecular sieve particles 130 increases, affecting its thermal stability and mechanical strength. The presence of mesoporous structures can effectively connect the channels of the microporous structures, facilitating the entry and exit of gas molecules from the air into and out of the various channels inside the molecular sieve particles 130, enhancing sound absorption performance, and effectively reducing the loudspeaker's F0.

[0036] In some feasible embodiments, the crystal morphology of the molecular sieve powder 130 includes spherical or cubic shapes. Specifically, the spherical and cubic molecular sieve powder 130 has a more regular shape and a more uniform particle size distribution, which is beneficial for achieving a higher packing density in the space of the rear acoustic cavity 111 and increasing the filling amount of the molecular sieve powder 130.

[0037] In some feasible embodiments, the breathable separator 140 includes a breathable woven mesh or a core-pore membrane. Specifically, the breathable woven mesh can be woven from organic polymer filaments, while the core-pore membrane is formed by irradiating an organic polymer membrane with high-energy rays and then corroding it to create pores in the organic polymer membrane. Both the breathable woven mesh and the core-pore membrane have breathable pores, allowing gas to pass through while simultaneously intercepting the molecular sieve particles 130.

[0038] In some feasible implementations, the breathable woven mesh fabric is made of at least one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), and polyetheretherketone (PEEK). It is understood that these polymeric materials, such as PET, PEN, PP, and PEEK, all possess good heat resistance and high mechanical strength, and the resulting threads can be used as weaving materials for the breathable woven mesh fabric, providing it with good structural stability. PET can be made into finer threads, while PEN, PP, and PEEK materials can produce thicker threads. Different types of threads can be selected as weaving materials based on requirements for thread diameter, mechanical strength, and temperature resistance.

[0039] In some feasible embodiments, the material of the core-pore membrane includes at least one selected from polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyimide (PI), and polytetrafluoroethylene (PTFE). Specifically, polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyimide (PI), and polytetrafluoroethylene (PTFE) all possess good chemical corrosion resistance, high temperature resistance, and high mechanical strength, and can maintain structural stability under the operating conditions of the sound-generating device 100, making them suitable as core-pore membrane materials for intercepting molecular sieve particles 130.

[0040] In some feasible implementations, refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a sound-generating device 100 provided in an embodiment of the present invention. The sound-generating device 100 includes a housing 110 and a sound-generating unit 120 disposed in the housing 110. A breathable isolation member 140 covers the outer surface of the sound-generating unit 110, isolating the magnetic circuit system inside the sound-generating unit 120 from the rear acoustic cavity 111 space. Molecular sieve powder particles 130 can fill almost the entire rear acoustic cavity 111 space.

[0041] In some feasible implementations, refer to Figure 2 , Figure 2 This is a schematic diagram of another sound-generating device 100 provided in an embodiment of the present invention. A breathable isolation member 140 is disposed in the rear sound cavity 111. The breathable isolation member 140 cooperates with the housing 110 to divide the rear sound cavity 111 into a first cavity 1111 and a second cavity 1112. The sound-generating unit 120 is located in the first cavity 1111, and the molecular sieve powder 130 is disposed in the second cavity 1112.

[0042] In this embodiment, the sound-generating device 100 includes a housing 110 and a sound-generating unit 120 disposed within the housing 110. The sound-generating unit 120 divides the housing 110 into a front sound cavity and a rear sound cavity 111. Molecular sieve particles 130 are disposed in the rear sound cavity 111. The molecular sieve particles 130 and the sound-generating unit 120 are separated by a breathable insulating member 140. The average particle size of the molecular sieve particles 130 is greater than 20 μm and less than 50 μm. The silicon-aluminum mass ratio of the molecular sieve particles 130 is less than 200. The crystallinity of the molecular sieve particles 130 is ≥90%. The crushing resistance of the molecular sieve particles 130 is greater than 0.01 N / particle and less than 0.5 N / particle. The average particle size of the molecular sieve powder 130 is greater than 20 μm to prevent leakage from the vent holes of the breathable isolation component 140. The average particle size is less than 50 μm to ensure that the molecular sieve powder 130 has good acoustic performance. The silicon-aluminum mass ratio of the molecular sieve powder 130 is less than 200, which allows the use of silicon source materials with relatively lower purity, saving raw material costs. In terms of crystallinity, the highly crystalline molecular sieve powder 130 has a more regular pore structure and higher mechanical strength, and can withstand higher pressure and impact. The molecular sieve powder 130 in this embodiment has a crystallinity of ≥90%, which belongs to the highly crystalline molecular sieve powder 130. It has a crushing force of greater than 0.01 N / particle and less than 0.5 N / particle, high structural strength, is not easy to break, and has good sound absorption performance.

[0043] This invention also provides an electronic device, which includes the sound-generating device 100 as described in the above embodiments.

[0044] In this embodiment, the electronic devices include mobile phones, laptops, tablets, VR (Virtual Reality) devices, AR (Augmented Reality) devices, TWS (True Wireless Stereo) earphones, smart speakers, smart wearable devices, etc.

[0045] Compared with the prior art, the beneficial effects of the electronic device provided in the embodiments of the present invention are the same as those of the sound-generating device 100 in the above embodiments, and will not be repeated here.

[0046] The sound-generating device of the present invention will be described in detail below with specific embodiments and comparative examples. It is important to understand that the following description is merely exemplary and not intended to limit the scope of the invention. It should be noted that the comparative examples were chosen to demonstrate the technical advancement of the present invention and do not necessarily represent existing technology.

[0047] Example 1

[0048] ZSM-5 molecular sieve powder was selected, with an average particle size of 35 μm, a crystallinity of 95%, a silica-alumina ratio of 120, a crushing resistance of 0.05 N / particle, and a density of 0.65 g / ml. 0.25 ml of the above molecular sieve powder was filled into a 0.3 ml rear cavity. The sound-generating monomer had an air permeability of 2500 L / m³. 2 The speaker is made by covering the woven mesh fabric with / s.

[0049] Comparative Example 1

[0050] ZSM-5 molecular sieve powder was selected, with an average particle size of 2μm, crystallinity of 83%, a silica-alumina ratio of 120, crushing resistance of 0.01N / particle, and a density of 0.35g / ml. 0.25ml of the above molecular sieve powder was filled into a 0.3ml rear cavity. The sound-generating monomer had an air permeability of 2500L / m³. 2 The speaker is made by covering the woven mesh fabric with / s.

[0051] Comparative Example 2

[0052] ZSM-5 molecular sieve powder was selected, with an average particle size of 35 μm, a crystallinity of 82%, a silica-alumina ratio of 120, a crushing resistance of 0.01 N / particle, and a density of 0.57 g / ml. 0.25 ml of the above molecular sieve powder was filled into a 0.3 ml rear cavity. The sound-generating monomer had an air permeability of 2500 L / m³. 2 The speaker is made by covering the woven mesh fabric with / s.

[0053] It should be noted that the loudspeakers in Example 1 and Comparative Examples 1-2 are of the same model, with a total rear cavity volume of 0.46 ml. The performance of the loudspeakers in Example 1 and Comparative Examples 1-2 will be tested below.

[0054] Acoustic performance testing: IMP (Impedance) tests were performed on the loudspeakers of Example 1 and Comparative Examples 1-2, and the resonant frequencies F0 of the loudspeakers were measured as shown in Table 1 below.

[0055] Table 1

[0056] Example 1 820 718 Comparative Example 1 820 716 Comparative Example 2 820 727

[0057] As shown in Table 1, the performance of the loudspeakers in Example 1 and Comparative Example 1 after being filled with molecular sieve powder is basically the same. This indicates that although increasing the particle size of the molecular sieve powder will reduce the low-frequency performance of the loudspeaker, controlling the crystallinity can compensate for this performance loss to a certain extent, allowing the large-particle-size molecular sieve powder in Example 1 to achieve a similar sound absorption effect as the small-particle-size molecular sieve powder in Comparative Example 1. Compared with the loudspeaker in Comparative Example 2, the F0 value of the loudspeaker in Example 1 is 9 Hz lower, indicating that the molecular sieve powder with higher crystallinity has better acoustic performance. This is because the molecular sieve powder with higher crystallinity in Example 1 has a more complete pore structure.

[0058] High-power experimental test: Under room temperature conditions, the speakers of Example 1 and Comparative Examples 1-2 were set to a voltage of 3.45V and fed with a white noise signal, and operated continuously for 96 hours. After the experiment, the resonant frequency F0 of each group of speakers was measured, and the powder contamination of the rear cavity was observed after disassembling the speakers. The results are shown in Table 2 below.

[0059] Table 2

[0060]

[0061] As can be seen from the results in Table 2, after the reliability test, the F0 of the speaker in Example 1 changed by 13 Hz, which is a small change, and there was no dust breakage after the test. After the reliability test, the F0 of the speaker in Comparative Example 1 changed by 27 Hz, which is a large change, and there was a small amount of dust breakage after the test. After the reliability test, the F0 of the speaker in Comparative Example 2 changed by 21 Hz, which is a large change, and there was a small amount of dust breakage after the test.

[0062] Compared to Comparative Example 1, the molecular sieve powder in Example 1 has a larger particle size and higher crystallinity. No powder breakage was observed after the experiment, and the F0 variation was smaller, indicating stronger resistance to reliability testing. Compared to Comparative Example 2, both Example 1 and Comparative Example 2 have the same particle size, but the crystallinity of the molecular sieve powder in Example 1 is 13% higher than that in Comparative Example 2. After the experiment, the speaker in Comparative Example 2 was disassembled and a small amount of powder breakage was found, indicating that 95% crystallinity provides higher particle structural strength. In summary, the molecular sieve powder with a crushing force greater than 0.01 N / particle provided by this invention has good strength and wear resistance, and no powder breakage was observed after reliability testing.

[0063] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A sound-generating device, characterized in that, The device includes a housing and a sound-generating unit disposed within the housing. The sound-generating unit divides the housing into a front sound cavity and a rear sound cavity. Molecular sieve particles are disposed within the rear sound cavity. The molecular sieve particles and the sound-generating unit are separated by a breathable insulating element. The average particle size of the molecular sieve particles is greater than 20 μm and less than 50 μm. The silicon-to-aluminum mass ratio of the molecular sieve particles is less than 200. The crystallinity of the molecular sieve particles is ≥90%. The crushing resistance of the molecular sieve particles is greater than 0.01 N / particle and less than 0.5 N / particle. The density of the molecular sieve particles is 0.5-1.5 g / ml.

2. The sound-generating device as described in claim 1, characterized in that, The specific surface area of ​​the molecular sieve particles is greater than 120 m². 2 / g.

3. The sound-generating device as described in claim 1, characterized in that, The molecular sieve powder contains a microporous structure with a pore size of 0.5-0.7 nm.

4. The sound-generating device as described in claim 3, characterized in that, The molecular sieve particles also contain mesoporous structures with a pore size of 2-4 nm.

5. The sound-generating device as described in claim 1, characterized in that, The crystal morphology of the molecular sieve particles includes spherical or cubic shapes.

6. The sound-generating device as claimed in claim 1, characterized in that, The breathable insulating material includes breathable woven mesh or a nuclear pore membrane.

7. The sound-generating device as described in claim 6, characterized in that, The breathable woven mesh fabric is made of at least one of polyethylene terephthalate, polyethylene naphthalate, polypropylene, and polyetheretherketone. And / or, the material of the nuclear pore membrane includes at least one of polyethylene terephthalate, polycarbonate, polypropylene, polyimide, and polytetrafluoroethylene.

8. The sound-generating device as claimed in claim 1, characterized in that, The breathable insulating component covers the outer surface of the sound-generating unit; Alternatively, the breathable insulating component is disposed in the rear acoustic cavity, and the breathable insulating component cooperates with the housing to divide the rear acoustic cavity into a first cavity and a second cavity, the sound-generating unit is located in the first cavity, and the molecular sieve powder is disposed in the second cavity.

9. An electronic device, characterized in that, Includes the sound-generating device as described in any one of claims 1 to 8.

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