Acoustic reinforcing material block and manufacturing method and application thereof

Abstract

The invention provides an acoustic reinforcing material block as well as a manufacturing method and application thereof. The acoustic reinforcing material block is prepared by taking components including a porous material, a binder, a pore-forming aid or gas, a filler and water as raw materials and adopting a foaming freeze-drying process, a freezing foaming process or a sintering forming process, the acoustic reinforcing material block is internally provided with at least three stages of pore channels, the first-stage pore channels comprise micropores of the porous materials, the second-stage pore channels comprise pore channels formed between the porous materials, between the porous materials and the filler and between the filler and the filler, and the third-stage pore channels comprise cavities formed by pore-forming aid or gas. When the acoustic reinforcing material block provided by the invention is filled in a loudspeaker resonant cavity of the electronic equipment, the volume of the loudspeaker resonant cavity can be virtually increased, so that the loudspeaker can achieve better sound quality under the condition of smaller volume, and has more excellent sound performance.

Description

technical field [0001] The invention relates to an acoustic reinforcing material block and its production method and application, belonging to the technical field of electroacoustic products. Background technique [0002] In recent years, with the rapid development of science and technology, people have become more and more interconnected, resulting in the emergence and development of a series of electronic devices. From mobile phones, tablet computers to smart speakers, TWS headsets, VR, AR, etc., people are constantly pursuing the sensory stimulation brought by modern technology. Acoustic technology is an indispensable part to realize such requirements. [0003] With the continuous development of mobile terminal devices such as mobile phones, their requirements for audio quality are also getting higher and higher. Generally speaking, as the rear cavity of the speaker increases, the performance improves accordingly. However, in mobile terminals such as mobile phones, ther...

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Problems solved by technology

[0004] However, the granular acoustic enhancement material is difficult to fill or cannot be completely filled during filling, leaving a certain gap in the rear cavity of the speaker

When the speaker is working, the voice coil drives the gas in the rear shell to vibrate, causing the acoustic reinforcement material filled in the rear cavity to vibrate together, which affects the sense of hearing; since the filling amount of the acoustic reinforcement material directly affects the ΔF0 of the speaker, a low filling amount of the granular acoustic reinforcement material will Affect the utilization rate of the rear cavity space; in addition, the vibration will also cause the granular acoustic reinforcement material to fall and break during the collision process, and the falling powder will spread through the mesh cloth to the inside of the speaker and damage the speaker

[0005] Using the existing conventional technology in this field to manufacture bulk acoustic reinforcement materials, it is difficult for the gas to effectively reach the inside of the manufactured material, which will affect the performance of the material; in addition, due to the nature of the material itself, such as the insufficient strength of the product, there will be a large loss in long-term use. Risk of fragmentation and falling powder; In addition, there are also reports in the prior art of the art that the formed granular acoustic reinforcement materials are bonded into blocks, but when using adhesives to process particles, it is inevitable that there will be adhesives. Blocks the pores present in the particle, affecting performance

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