Sound Absorption Component Using Cotton Shell and Granular Particles
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Solution Overview
Problem
Conventional loudspeaker modules face challenges in efficiently utilizing the space of the rear vocal cavity and achieving optimal sound absorption performance due to the use of non-sound-absorbing plastic hauling shells and excessive adhesive agents, which compromise the gas adsorption and desorption abilities of porous materials.
Innovation Solution
A sound absorption component utilizing a hauling shell made of sound-absorbing cotton with an opening sealing member, filled with granulated porous material particles, such as zeolite, activated carbon, or carbon nanotubes, that matches the shape of the rear vocal cavity, ensuring effective space utilization and acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plastic hauling shell is used to package porous material, then the packaging effect is good and the process is simple, but the plastic shell does not have sound absorption effect and occupies the space of the rear vocal cavity
Solution Approach 1:
The patent merges the packaging function and sound absorption function into a single component by using sound-absorbing cotton as both the packaging material and the sound-absorbing medium, eliminating the need for separate plastic shells and maximizing space utilization in the rear vocal cavity
Solution Approach 2:
The sound-absorbing cotton serves multiple functions simultaneously: it acts as the packaging material (hauling shell), provides sound absorption performance, and replaces the non-functional plastic shell, thereby achieving multi-functionality in a single component
2Strength
If excessive adhesive agent is added to prevent micro powder leakage, then the particle strength is ensured, but the pore paths of the porous material are blocked and the gas adsorption and desorption ability decreases
Solution Approach 1:
The patent optimizes the adhesive agent content parameter to a specific range (0.5-2 parts by weight per 100 parts of porous material), transforming the excessive adhesive addition into a controlled parameter that maintains particle strength while preserving pore paths and sound absorption performance
Solution Approach 2:
The patent applies partial action by adding only the necessary amount of adhesive agent (not excessive) to achieve sufficient particle strength without blocking pore paths, thereby avoiding the negative effects of over-addition while maintaining the required strength
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for efficient use of the rear vocal cavity space, reduces resonance frequency, minimizes micro-powder generation, and maintains sound absorption performance by using sound-absorbing cotton as the hauling shell, resulting in improved acoustic performance and reduced frequency resonance.
Implementation Method 1
the material of the hauling shell is sound absorbing cotton
Implementation Method 2
by filling the rear vocal cavity with a porous material and taking advantage of the property of the porous material to rapidly adsorb/desorb gas in the rear vocal cavity
Data Source
Figure 1~4
AI summary
The present utility model discloses a sound absorption component and a loudspeaker module having the sound absorption component, and relates to the technical field of electroacoustic products. The sound absorption component comprises a hauling shell and sound absorbing particles that are packaged within the hauling shell, wherein the hauling shell is provided with an opening, the opening of the hauling shell is provided with an opening sealing member for sealing the sound absorbing particles, the material of the hauling shell is sound absorbing cotton, and the sound absorbing particles are formed by granulation of porous material raw powder; and the shape of the sound absorption component matches with the shape of the space to be filled by the sound absorption component. The sound absorption component and the loudspeaker module having the sound absorption component of the present utility model solve the technical problem in the prior art that the space of the rear vocal cavity of the loudspeaker module cannot be sufficiently utilized. The sound absorption component and the loudspeaker module having the sound absorption component of the present utility model sufficiently utilizes the space of the rear vocal cavity of the module, and sufficiently utilizes the sound absorption performance of the filling sound absorbing particles, and the product has good acoustic performance.