Porous toning piece and loudspeaker module including same

A technology of sound parts and tuning, which is applied in the fields of porous tuning parts and speaker modules, and can solve problems such as the inability to meet the acoustic performance requirements of micro-speaker products, the inability to realize the feasibility of industrial production processes, and the adverse effects of speaker acoustic performance. Achieve the effect of facilitating large-scale industrial production, easy control of relevant parameters, and improving effective utilization

Inactive Publication Date: 2018-07-27
周漫辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the miniature speaker module with a flat structure will cause the cavity volume of the rear acoustic cavity to be reduced, resulting in the resonant frequency F of the speaker 0 Increased, low-frequency sensitivity decreases, adversely affecting the acoustic performance of the loudspeaker
[0004] Traditional tuning materials include foamed cotton and non-foamed porous tuning materials, and foamed cotton materials such as fine-pored polyurethane foam and melamine foam. However, as micro-speaker modules become increasingly thinner, this Traditional tuning materials can no longer meet the acoustic performance requirements of micro-speaker products
Non-foaming materials such as zeolite, but the zeolite tuning material is limited by its own particle shape, which cannot realize the process feasibility of industrial production, and the accessory structure of the matching product greatly limits the effective use of the sound cavity space behind the micro-speaker

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] According to the structure of the rear acoustic cavity of the loudspeaker, the foam is die-cut into a foam die-cut piece whose shape and size are adapted to the rear acoustic cavity of the loudspeaker.

[0051] Prepare the tuning material slurry, the silica powder is used as the tuning material, the silica powder and the binder silica sol, 20% ethanol solution and PEG400 are used as auxiliary agents, and the mass ratio is 35:5:65:1.2 Mix well to make a slurry.

[0052] The pore diameter of the micropores of the silica powder particles is 0.55-0.59 nm, and the local peak value is 0.55-0.58 nm; the pore diameter of the mesopores is 2-10 nm, and the local peak value is 2-8 nm.

[0053] Dip the foam die-cut into the tuning material slurry to obtain a molded body.

[0054] The molded body was dried in nitrogen at 40°C for 2.5 hours to obtain a porous tuning piece. The diameter of the macropores in the porous tuning piece is 0.7-700 μm, and the local peak value is 0.8-500 μ...

Embodiment 2

[0056] According to the structure of the rear acoustic cavity of the loudspeaker, the foam is die-cut into a foam die-cut piece whose shape and size are adapted to the rear acoustic cavity of the loudspeaker.

[0057] Prepare the tuning material slurry, alumina powder is used as the tuning material, and the alumina powder is mixed with the binder silica, absolute ethanol and PEG400 at a mass ratio of 25:5:35:1.5 to make a slurry .

[0058] The pore diameter of the micropores of the alumina powder particles is 0.515-0.57 nm, and the local peak value is 0.53-0.55 nm; the pore diameter of the mesopores is 6-15 nm, and the local peak value is 8-12 nm.

[0059] Mix well to make a slurry.

[0060] The slurry is evenly sprayed onto the foam die-cut pieces to obtain a molded body.

[0061] The molded body was dried in air at 150°C for 72 hours to obtain a porous tuning piece. The diameter of the large pores in the porous tuning piece is 5-500 μm, and the local peak value is 10-320 ...

Embodiment 3

[0063] Make the activated carbon fiber skeleton and the overlay container, put the activated carbon fiber skeleton into the overlay container, and the overlay container is adapted to the shape and size of the rear sound cavity of the loudspeaker.

[0064] Prepare the tuning material slurry. The natural zeolite powder is used as the tuning material. The natural zeolite powder, aluminum sol, solvent and additives are mixed uniformly at a mass ratio of 15:1:40:10 to make a slurry.

[0065] The pore diameter of the micropores of the natural zeolite powder particles is 0.44-0.50 nm, and the local peak value is 0.46-0.48 nm; the pore diameter of the mesopores is 8-12 nm, and the local peak value is 10-12 nm.

[0066] The non-foamed tuning material slurry is molded in a covered container to form a wet molded body.

[0067] Dry the wet molded body in an inert gas at 100°C for 2 hours to form a dry molded body.

[0068] The tuning element is obtained after the dried molded body is roa...

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Abstract

The invention discloses a porous toning piece comprising micropores with the pore diameter of 0.3-2nm and the local peak of 0.4-2nm, mesoporous with the pore diameter of 2-30nm and local peak of 2-12nm, and macropores with the pore diameter of more than 700nm and the local peak of 0.8-500 microns; a silicon-aluminum atomic ratio in the porous toning piece is more than 120. The porous toning pieceprovided by the invention is significantly reduced in F0, and is simple in preparation technology, easy to control related parameter and convenient for industrial production in a large scale.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a porous tuning part and a loudspeaker module using the porous tuning part. Background technique [0002] As an energy converter that converts electrical signals into sound signals, the speaker module is an indispensable part of electro-acoustic products. The speaker module usually consists of a shell and a speaker unit, and the speaker unit divides the inner cavity of the module shell into two cavities, a front sound cavity and a rear sound cavity. In order to improve the acoustic performance of the speaker module (such as reducing the resonant frequency F of the module 0 , extended bandwidth). Usually, a tuning piece is added to the rear cavity, and the tuning piece will absorb part of the sound energy, which is equivalent to expanding the volume of the rear cavity, thereby reducing the F of the module. 0 Effect. [0003] In recent years, under the trend of increasingl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06C09D1/00C09D7/61C09D7/65H04R9/02
CPCH04R9/06C09D1/00C09D7/61C09D7/65H04R9/02H04R2400/11
Inventor 周漫辉
Owner 周漫辉
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