Speakers and electronic devices improved by ITH molecular sieving.

Abstract

The present invention discloses a speaker and electronic device improved by an ITH molecular sieve. The ITH molecular sieve is loaded into the back chamber of the speaker. The ITH molecular sieve consists of a framework containing silica and an oxide of the non-silicon element M, and an extra-framework cation. The Si / M molar ratio is at least 80, preferably 100 or more. The ITH molecular sieve has a pore size of 0.4 Å to 0.55 Å and a pore volume of 0.10 to 0.25 cm³. 3 It contains uniform pores with a density of / g. Including an ITH molecular sieve in the speaker's back chamber increases the acoustic compliance of the air in the back chamber, improving the speaker's performance in the low-frequency range.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China National Intellectual Property Office on March 15, 2023, with application number 202310250461.3, and titled "Speaker, electronic device improved by ITH molecular sieve," and incorporates the entirety of that application by reference. This invention relates to the field of speaker devices, and more specifically to speakers and electronic devices improved by ITH molecular sieving. [Background technology]

[0002] With advancements in science and technology, demands on speakers are increasing, and for mobile phone speakers in particular, there is a need for speakers that are not only small in volume and capable of emitting sound, but also to provide good sound quality despite their small size. The quality of sound is related to each stage of the speaker's design and manufacturing process, and is especially related to the design dimensions of the speaker's back chamber. Generally, when the back chamber of a speaker is reduced, the response in the low-frequency range deteriorates significantly, resulting in poor sound quality, making it difficult to provide good sound quality under the condition of a small back chamber.

[0003] To resolve the above contradiction, engineers have proposed various methods, such as 1) using a gas with good acoustic compliance instead of air as the atmosphere of the back chamber, 2) filling the back chamber with foam such as melamine to increase acoustic compliance, and 3) filling it with porous materials such as activated carbon, zeolite, and silica to increase the volume of the virtual back chamber and improve acoustic compliance. Of these, the third method has the most significant effect.

[0004] CN101416528A proposes using molded activated carbon as a speaker improvement material. CN103477655A proposes using porous carbon material as a low-frequency improvement material for speakers, and using Cu-ZSM-5 to adsorb water vapor prevents the water vapor pressure in the back chamber from becoming too high and clogging the porous carbon. In the speaker improvement material proposed in CN105013436A, the zeolite structure is mainly FER, MFI, and BEA.

[0005] ITH molecular sieves, commonly known as ITQ-13, are a novel microporous material with a three-dimensional orthogonal interconnected channel structure possessing both 9-membered and 10-membered rings simultaneously. The 9-membered ring channel is a linear channel parallel to the a-axis with an aperture size of 0.40 nm × 0.49 nm. The other two 10-membered ring channels are a linear channel parallel to the b-axis (0.47 nm × 0.51 nm) and a sinusoidal meandering channel approximately parallel to the c-axis (0.48 nm × 0.57 nm), respectively. [Overview of the Initiative]

[0006] This invention provides a speaker and electronic device improved by an ITH molecular sieve, in which an ITH molecular sieve material is loaded into the back chamber. The addition of this material can significantly improve the low-frequency performance of the speaker.

[0007] To achieve the above objectives, the present invention employs the following means.

[0008] In one aspect, the present invention provides a speaker improved by an ITH molecular sieve, in which an ITH molecular sieve is loaded into the back chamber.

[0009] The ITH molecular sieve consists of a skeleton containing silica and an oxide of a non-silicon element M, and an extra-skeleton cation. The Si / M molar ratio is at least 80, preferably 100 or more.

[0010] The aforementioned ITH molecular sieve has a pore size of 0.4 Å (angstrom) to 0.55 Å and a pore volume of 0.10 to 0.25 cm³.3 It contains uniform pores at a density of / g.

[0011] If the pore size of the ITH molecular sieve is too small (less than 0.4 Å), the size of the nitrogen molecule is 0.364 Å, so the channel size and the nitrogen size are very close, limiting the rapid adsorption, desorption, and diffusion of nitrogen within the channel. If the pore size is too large, the physical force corresponding to the nitrogen molecule decreases, limiting the amount of enrichment analysis corresponding to the sound pressure change of nitrogen by the channel, which is effectively undesirable. If the pore volume is too small, the corresponding degree of ITH crystallinity is insufficient, there are not enough pores, and the corresponding acoustic effect is limited. Preferably, the pore volume is 0.15 to 0.25 cm³. 3 It is / g.

[0012] According to the speaker of the present invention, preferably, the non-silicon element M is a trivalent, tetravalent, or pentavalent ion, where trivalent ions mainly include, but are not limited to, Al, Fe, B, etc.; tetravalent ions mainly include, but are not limited to, Ge, Ti, Zr, etc.; and pentavalent ions mainly include, but are not limited to, Ga, etc. More preferably, the non-silicon element M is B or Al.

[0013] According to the speaker of the present invention, preferably, the extraskeletal cation is a H ion or an alkali metal ion. and Selected from at least one alkaline earth metal ion, and more preferably, the extra-skeletal cation is an alkali metal Ions and Alkaline earth metals ion It will be selected from at least one of the following.

[0014] Typically, the framework of ITH molecular sieves consists mainly of silica and germanium dioxide. Germanium-containing molecular sieves undergo hydrolysis by combining with water vapor in air, resulting in poor stability; therefore, the significance of scientific research generally far outweighs their practical value. In addition to silicon and germanium, ITH is generally synthesized as boron-containing ITQ-13 by introducing boron. Aluminum-containing ITQ-13 is generally synthesized using two methods: 1) substitution with boron-containing ITQ-13, and 2) direct synthesis by optimizing the conditions. In the ITH molecular sieve of the present invention, M is preferably B or Al, and if the Si / M ratio is lower than 80, it will significantly adsorb moisture from the air, occupying most of the pore channels of the molecular sieve, and the low-frequency improvement effect will be lost. Furthermore, when synthesizing with an M element other than germanium, if the Si / M ratio is too low, synthesis becomes difficult, or the crystallinity of the synthesized ITH structure deteriorates or becomes inferior.

[0015] Before use, ITH molecular sieves are generally exchanged with cations as needed to obtain different types of ITH molecular sieves. Generally, the molecular sieves are exchanged with ammonium salts, alkali metal salts, or alkaline earth metal salts. Ammonium salts mainly include ammonium chloride, ammonium nitrate, ammonium sulfate, and ammonium carbonate; alkali metal salts mainly include lithium salts, sodium salts, potassium salts, and rubidium salts; the anions of alkali metal salts include chloride ions, sulfate ions, and nitrate ions; and alkaline earth metal salts mainly include magnesium salts, calcium salts, and barium salts; the anions of alkali metal salts include chloride ions, sulfate ions, and nitrate ions.

[0016] According to the speaker of the present invention, preferably, the content of the extraskeletal cation is less than 4.5 wt.%, more preferably less than 1.5 wt.%, and even more preferably 0.05 wt.% to 1.5 wt.%.

[0017] According to the speaker of the present invention, preferably, the particle size of the ITH molecular sieve is greater than 10 nm, and more preferably greater than 100 nm.

[0018] According to the speaker of the present invention, preferably, the particle size of this molecular sieve is less than 10 μm, and more preferably less than 7 μm.

[0019] According to the speaker of the present invention, preferably, in the back chamber, a binder is added to the ITH molecular sieve and molded into a specific shape. This prevents the molecular sieve raw powder from entering the speaker unit. The specific shape is preferably particulate (spherical, ellipsoidal, ellipsoidal with a depression in the middle, irregular particulate, etc.), sheet-like or block-like. In the case of sheet-like and block-like, after loading first, the back chamber can be assembled. In the case of particulate, generally, it is loaded after assembling the back chamber.

[0020] According to the speaker of the present invention, preferably, among the specific shapes, the particulate shape has a size of 80 μm to 2000 μm, and more preferably 100 μm to 1500 μm.

[0021] According to the speaker of the present invention, preferably, among the specific shapes, the sheet-like shape has a size determined according to the cavity of the back chamber of the speaker. Preferably, its thickness is 100 μm to 1000 μm, and its length and width are 3 mm to 100 mm.

[0022] According to the speaker of the present invention, preferably, among the specific shapes, the block-like shape has a size determined according to the cavity of the back chamber of the speaker. Preferably, its thickness is 1 mm to 20 mm, and its length and width are 3 mm to 100 mm.

[0023] Typically, directly synthesized ITH molecular sieves are in powder form of 10 μm or less, and often need to be molded into a specific shape with a binder before being placed in the back chamber of a speaker. If the raw powder is used directly without molding, the raw powder will affect the performance of the speaker when placed in the speaker alone. In the process of molding molecular sieves, it is generally necessary to add the molecular sieves to be molded, a solvent, a binder, and an auxiliary agent. Here, the binder may be an inorganic binder or an organic polymer binder, preferably the inorganic binder includes activated alumina, silica sol, etc., and the organic polymer binder includes acrylate-based, epoxy-based, urethane-based, etc. The solvent mainly refers to water and various organic solvents, such as ethanol, toluene, acetone, tetrahydrofuran, etc. The auxiliary agent refers to other substances added in small amounts, generally less than 5%.

[0024] According to the speaker of the present invention, the framework of the ITH molecular sieve does not need to contain an oxide of the non-silicon element M.

[0025] The speaker provided by this invention fills the back chamber with an ITH molecular sieve, increasing the acoustic compliance of the air in the back chamber and improving the speaker's performance in the low-frequency range.

[0026] In another aspect, the present invention provides an electronic device including any of the above-described speakers. The electronic device includes, but is not limited to, a smartphone, TWS (True Wireless Stereo) earphones, headphones, smart glasses, a smartwatch, a VR device, an AR device, a tablet, or a thin laptop computer. [Brief explanation of the drawing]

[0027] [Figure 1] This is a comparative diagram of nitrogen adsorption at room temperature of molecular sieve raw powder in Example 1 and Comparative Example 1. [Figure 2]This is a comparison chart of the frequency response curves and impedance curves of the speaker back chamber in Example 1, with and without the addition of ITH molecular sieves. [Figure 3] This is a low-temperature nitrogen adsorption characterization diagram of the aluminum-containing ITH molecular sieve powder in Example 3. [Modes for carrying out the invention]

[0028] The present invention will be further described below with reference to preferred embodiments in order to more clearly illustrate it. As will be understood by those skilled in the art, the following descriptions are illustrative and not limiting, and the scope of protection of the present invention should not be limited thereto.

[0029] All numerical specifications in this invention (including their respective ranges, such as temperature, time, concentration, and weight) may be approximate values ​​that are generally preferably changed in increments of 0.1 or 1.0 ((+) or (-)). All numerical specifications are understood to be preceded by the term "approximately".

[0030] Example 1 In this example, an all-silicon ITH molecular sieve (ITQ-13) was manufactured. It was then applied to a speaker, and its acoustic performance was tested. The process included the following steps.

[0031] 1) Manufacturing of all-silicon ITH molecular sieves (ITQ-13) All-silicon ITH molecular sieves were synthesized using tetraethyl orthosilicate as a silicon source, hydrogen fluoride as a mineralizing agent, hexamethonium hydroxide as a template agent, and water. The specific mixing ratio was 1 SiO2:0.5 hexamethonium hydroxide:0.5 HF:7 H2O. The hydrothermal reaction temperature was 160°C, and the reaction time was 120 h. After crystallization, the reactants were centrifuged, washed with water, dried overnight at 110°C, and then calcined at 550°C for 8 hours in an air atmosphere to obtain all-silicon ITH raw powder. The size of the all-silicon ITH raw powder was mainly distributed between 1 and 3 μm.

[0032] In low-temperature nitrogen adsorption characterization (tested at 77K using Micromeritics' ASAP 2020 specific surface area and pore size distribution analyzer), the molecular sieve consisted mainly of pores in the low-pressure region and deposit pores in the high-pressure region. BET was 407m 2 The density is / g, the median pore width is 0.52nm, and the t-plot outer surface area is 50m². 2 The value is / g, and the pore volume is 0.17 cm³. 3 It was / g.

[0033] 2) Add the binder and granulate. After calcination, all-silicone ITH raw powder, water, and binder (acrylic acid ester latex A, 50% solids) were mixed in a mass ratio of 48:50:12 to prepare a slurry. This slurry was then spray-dried using a 400 μm head (180°C at the top of the tower, 140°C at the top of the tower, spray pressure 0.3 MPa) and granulated to obtain all-silicone ITH particles. The particles were sieved with a mesh to obtain particles with a diameter of 270-330 μm, which were designated as Sample 1 (average diameter 300 μm), and the following tests were performed.

[0034] 3) Acoustic performance test A commercially available 1115-type speaker was used. The back chamber volume in the device was 0.4 cm³. 3 (Abbreviated as 0.4cc), and it was filled to 100%. Specific data is shown in Table 1.

[0035] The acoustic effects are shown in Figure 2. After adding an all-silicon ITH molecular sieve (Sample 1) to the speaker's back chamber, the sound pressure in the low-frequency range clearly improved, and the resonant frequency also shifted significantly to the low-frequency range.

[0036] The room-temperature nitrogen adsorption and desorption of all-silicon ITH molecular sieve powder was tested at room temperature (25 °C) as shown in Figure 1 (using the ASAP 2020 specific surface area and pore size distribution analyzer of Micromeritics). The ITH adsorption amount was 15-20% higher than that of the current comparative example 1, and the acoustic effect was about 10-15% higher than that of comparative example 1, which basically corresponded to the room-temperature nitrogen adsorption.

[0037] Example 2 In this example, a boron-containing ITH molecular sieve (B-containing ITQ-13 with a Si / B ratio of 500) was manufactured, and it was applied to a speaker and its acoustic performance was tested, including the following process.

[0038] 1) Manufacture of boron-containing ITH molecular sieve (B-containing ITQ-13 with a Si / B ratio of 500) Based on Example 1, boric acid as a boron source was added. The specific mixing ratio was 1 SiO2: 0.002 boric acid: 0.5 hexamethonium hydroxide: 0.5 HF: 7 H2O. The temperature of the hydrothermal reaction was 160 °C and the reaction time was 120 h. Otherwise, it was the same as Example 1, and boron-containing ITH molecular sieve powder was obtained.

[0039] In the low-temperature nitrogen adsorption characterization (tested at 77 K using the ASAP 2020 specific surface area and pore size distribution analyzer of Micromeritics), the molecular sieve mainly consisted of pores in the low-pressure region and deposition pores in the high-pressure region. The BET was 378 m 2 / g, the H-K median pore width was 0.51 nm, the t-plot external surface area was 60 m 2 / g, and the pore volume was 0.15 cm 3 / g.

[0040] 2) Adding a binder and granulating After calcination, boron-containing ITH raw powder, water, and a binder (acrylic acid ester latex A, 50% solids) were mixed in a mass ratio of 48:50:12 to prepare a slurry. This slurry was then spray-dried using a 400 μm head (180°C at the top of the tower, 140°C at the top of the tower, spray pressure 0.3 MPa) and granulated to obtain boron-containing ITH particles. The particles were sieved through a mesh to obtain particles with a diameter of 270-330 μm, which were designated as Sample 2 (average diameter 300 μm), and the following tests were performed.

[0041] 3) Acoustic performance test A commercially available 1115-type speaker was used. The back chamber volume in the device was 0.4 cm³. 3 (Abbreviated as 0.4cc), and it was filled to 100%. Specific data is shown in Table 1.

[0042] Example 3 In this example, an aluminum-containing ITH molecular sieve (Al-containing ITQ-13, with a Si / Al ratio of 500) was manufactured. This sieve was then applied to a speaker, and its acoustic performance was tested. The process included the following steps.

[0043] 1) Production of aluminum-containing ITH molecular sieves (Al-containing ITQ-13, with a Si / Al ratio of 500) Based on Example 1, sodium aluminate was added as an aluminum source. The specific mixing ratio was 1 SiO2:0.002, sodium aluminate:0.5, hexamethonium hydroxide:0.5, HF:7 H2O. The hydrothermal reaction temperature was 160°C, and the reaction time was 120 h. Otherwise, the procedure was the same as in Example 1, and an aluminum-containing ITH molecular sieve powder was obtained.

[0044] The low-temperature nitrogen adsorption characterization is shown in Figure 3. In the low-temperature nitrogen adsorption characterization (tested at 77K using Micromeritics' ASAP 2020 specific surface area and pore size distribution analyzer), as can be seen from Figure 3, the molecular sieve consists mainly of pores in the low-pressure region and deposit pores in the high-pressure region. BET is 417m 2The density is / g, the median pore width is 0.50 nm, and the t-plot outer surface area is 10² m². 2 The pore volume is 0.16 cm³ / g. 3 It was / g.

[0045] 2) Add the binder and granulate. After calcination, aluminum-containing ITH raw powder, water, and a binder (acrylic acid ester latex A, 50% solids) were mixed in a slurry at a ratio of 48:50:12. This slurry was then spray-dried using a 400 μm head (180°C at the top of the tower, 140°C at the top of the tower, spray pressure 0.3 MPa) and granulated to obtain aluminum-containing ITH particles. These particles were sieved with a mesh to obtain particles with a diameter of 270-330 μm, which were designated as Sample 3 (average diameter 300 μm), and the following tests were performed.

[0046] 3) Acoustic performance test A commercially available 1115-type speaker was used. The back chamber volume in the device was 0.4 cm³. 3 (Abbreviated as 0.4cc), and it was filled to 100%. Specific data is shown in Table 1.

[0047] Example 4 In this example, an aluminum-containing ITH molecular sieve (Al-containing ITQ-13, with a Si / Al ratio of 200) was manufactured. This sieve was then applied to a speaker, and its acoustic performance was tested. The process included the following steps.

[0048] 1) Production of aluminum-containing ITH molecular sieves (Al-containing ITQ-13, with a Si / Al ratio of 200) Based on Example 1, sodium aluminate was added as an aluminum source. The specific mixing ratio was 1 SiO2:0.005, sodium aluminate:0.5, hexamethonium hydroxide:0.5, HF:7 H2O. The hydrothermal reaction temperature was 160°C, and the reaction time was 120 h. Otherwise, the procedure was the same as in Example 1, and an aluminum-containing ITH molecular sieve powder was obtained.

[0049] In low-temperature nitrogen adsorption characterization (tested at 77K using Micromeritics' ASAP 2020 specific surface area and pore size distribution analyzer), the molecular sieve consisted mainly of pores in the low-pressure region and deposited pores in the high-pressure region. The BET was 383m 2 The density is / g, the median pore width is 0.50 nm, and the t-plot outer surface area is 87 m². 2 The value is / g, and the pore volume is 0.13 cm³. 3 It was / g.

[0050] 2) Add the binder and granulate. After calcination, aluminum-containing ITH raw powder, water, and a binder (acrylic acid ester latex A, 50% solids) were mixed in a slurry at a ratio of 48:50:12. This slurry was then spray-dried using a 400 μm head (180°C at the top of the tower, 140°C at the top of the tower, spray pressure 0.3 MPa) and granulated to obtain aluminum-containing ITH particles. These particles were sieved with a mesh to obtain particles with a diameter of 270-330 μm, which were designated as Sample 4 (average diameter 300 μm), and the following tests were performed.

[0051] 3) Acoustic performance test A commercially available 1115-type speaker was used. The back chamber volume in the device was 0.4 cm³. 3 (Abbreviated as 0.4cc), and it was filled to 100%. Specific data is shown in Table 1.

[0052] Example 5 Based on Example 2, the amount of boric acid was adjusted to produce a boron-containing ITH molecular sieve with a Si / B ratio of 100, which was then granulated to obtain particle sample 5. The acoustic performance is shown in Table 1.

[0053] Example 6 Based on Example 2, the amount of boric acid was adjusted to produce a boron-containing ITH molecular sieve with a Si / B ratio of 250, which was then granulated to obtain particle sample 6. The acoustic performance is shown in Table 1.

[0054] Example 7 The ITH molecular sieves obtained in Example 3 were changed in 2M ammonium nitrate solvent at 80°C for 6 hours. The ratio of molecular sieves to solution was 1:10. After the change, they were washed four times with water, dried, and calcined to obtain hydrogen-type ITH molecular sieves.

[0055] Particle sample 7 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0056] Example 8 The ITH molecular sieves obtained in Example 3 were converted to the lithium type using a lithium salt. Specifically, the sieves were converted with 2M lithium chloride solvent at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After conversion, the sieves were washed four times with water, dried, and calcined to obtain lithium-type ITH molecular sieves.

[0057] Particle sample 8 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0058] Example 9 The ITH molecular sieves obtained in Example 3 were converted to the sodium type using a sodium salt. Specifically, the sieves were converted in 2M sodium chloride solvent at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After conversion, the sieves were washed four times with water, dried, and calcined to obtain sodium-type ITH molecular sieves.

[0059] Particle sample 9 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0060] Example 10 The ITH molecular sieves obtained in Example 3 were converted to the potassium type using a potassium salt. Specifically, the sieves were converted with 2M potassium chloride solvent at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After conversion, the sieves were washed four times with water, dried, and calcined to obtain potassium-type ITH molecular sieves.

[0061] Particle sample 10 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0062] Example 11 The ITH molecular sieves obtained in Example 3 were replaced with potassium and sodium salts to obtain a potassium-sodium type. Specifically, the solution contained 1M potassium chloride and 1M sodium chloride, and the exchange was carried out at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After the exchange, the sieves were washed four times with water, dried, and calcined to obtain potassium-sodium type ITH molecular sieves.

[0063] Particle sample 11 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0064] Example 12 The ITH molecular sieves obtained in Example 2 were converted to the magnesium type using a magnesium salt. Specifically, the sieves were converted with 2M magnesium chloride solvent at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After conversion, the sieves were washed four times with water, dried, and calcined to obtain magnesium-type ITH molecular sieves.

[0065] Particle sample 12 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0066] Example 13 The ITH molecular sieves obtained in Example 2 were replaced with a magnesium-sodium mixed type using magnesium and sodium salts. Specifically, the solution contained 1 M magnesium chloride and 1 M sodium chloride, and the exchange was carried out at 80°C for 6 hours, with a molecular sieve-to-solution ratio of 1:10. After the exchange, the sieves were washed four times with water, dried, and calcined to obtain magnesium-sodium type ITH molecular sieves.

[0067] Particle sample 13 was obtained by molding and granulation under the molding conditions of Example 1. The acoustic performance is shown in Table 1.

[0068] Comparative Example 1 We disassembled a commercially available Apple iPhone X speaker and extracted particles from the back chamber for comparative testing. Acoustic performance is shown in Table 1, and nitrogen adsorption at room temperature is shown in Figure 1 (the samples were calcined before testing to remove organic adhesive).

[0069] The acoustic performance is shown in Table 1.

[0070] [Table 1] As can be seen from Table 1, the overall performance of the ITH molecular sieve improved by 15-20 Hz compared to comparative sample 1, and the low-frequency effect was significantly enhanced. As can be seen from this, the ITH molecular sieve of the present invention represents a remarkable technological advancement in acoustic performance.

[0071] Needless to say, the above embodiments of the present invention are merely illustrative for the purpose of clearly illustrating the present invention and do not limit the embodiments of the present invention. Those skilled in the art can make other different forms of changes or variations based on the above description, and it is not possible to comprehensively list all embodiments here. Changes or variations that are obvious from the technical proposal of the present invention are still within the scope of protection of the present invention.

Claims

1. An ITH molecular sieve is loaded into the back chamber, The ITH molecular sieve comprises a skeleton containing silica and an oxide of a non-silicon element M, and an extra-skeleton cation, with a Si / M molar ratio of at least 80. The aforementioned ITH molecular sieve has a pore size of 0.4 Å to 0.55 Å and a pore volume of 0.10 to 0.25 cm³. ３ A speaker improved by ITH molecular sieving, containing uniform pores at a density of / g.

2. The pore volume is 0.15 to 0.25 cm³. ３ The speaker according to claim 1, wherein the value is / g.

3. The speaker according to claim 1, wherein the non-silicon element M is selected from at least one of Al, Fe, B, Ge, Ga, Ti, and Zr.

4. The speaker according to claim 1, wherein the non-silicon element M is B or Al.

5. The aforementioned extraskeletal cation is selected from at least one of H ions, alkali metal ions, or alkaline earth metal ions. The speaker according to claim 1, wherein the content of the extraskeletal cation is 0.05 wt.% to 1.5 wt.%.

6. The speaker according to claim 1, wherein the particle size of the ITH molecular sieve is greater than 10 nm.

7. The speaker according to claim 6, wherein the particle size of the ITH molecular sieve is less than 10 μm.

8. The speaker according to any one of claims 1 to 7, wherein in the back chamber, a binder is added to the ITH molecular sieve and it is formed into a specific shape.

9. The speaker according to claim 8, wherein the specific shape includes particulate, sheet-like, or block-like shapes.

10. The speaker according to claim 9, wherein the particulate shape among the specified shapes has a size of 80 μm to 2000 μm.

11. The speaker according to claim 9, wherein the sheet-like shape among the specified shapes has a thickness of 100 μm to 1000 μm and a length and width of 3 mm to 100 mm.

12. The speaker according to claim 9, wherein the block-shaped of the aforementioned specific shapes has a thickness of 1 mm to 20 mm and a length and width of 3 mm to 100 mm.

13. The speaker according to any one of claims 1 to 7, wherein the framework of the ITH molecular sieve does not contain an oxide of the non-silicon element M.

14. An electronic device including a speaker according to any one of claims 1 to 13.

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