Mesh assemblies, computing systems, and methods for manufacturing a mesh assembly
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Solution Overview
Problem
Computing systems with spinning fans at high rpm produce annoying whine noise due to fan blades, and existing solutions like sealing the keypad or using sound-absorbing foam are not feasible for ultra-thin systems.
Innovation Solution
A mesh assembly comprising two overlapping meshes with specific hole patterns and orientations is placed between the fan and the housing opening, where at least one hole of the first mesh is partially obstructed by the second mesh, effectively attenuating the noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single mesh is used for noise attenuation, then the system thickness can be reduced, but the noise reduction effectiveness is insufficient
Solution Approach 1:
The patent combines two separate meshes into a single mesh assembly to achieve superior noise attenuation. The first mesh with larger holes and the second mesh with smaller holes work together synergistically, where the second mesh blocks noise that passes through the first mesh, providing cumulative noise reduction effectiveness that a single mesh cannot achieve.
Solution Approach 2:
The mesh assembly functions as a composite noise attenuation structure, where two different mesh configurations (first mesh with larger holes, second mesh with smaller holes) are combined to create a composite filtering effect. This composite approach allows the assembly to attenuate a broader spectrum of noise frequencies more effectively than either mesh alone.
2Object-affected harmful factors
If sound-absorbing foam is used to reduce noise, then noise attenuation can be achieved, but the system becomes too thick for ultra-thin designs
Solution Approach 1:
The patent uses thin mesh structures instead of bulky sound-absorbing foam. The meshes are configured with specific hole patterns and can be made from thin materials that provide effective noise attenuation while maintaining a compact profile suitable for ultra-thin computing systems, eliminating the need for thick foam layers.
Solution Approach 2:
The mesh assembly utilizes porous structures with controlled hole sizes and patterns to achieve noise attenuation. The first mesh has larger porous openings while the second mesh has smaller porous openings, creating a hierarchical porous structure that filters noise effectively without requiring the solid, thick construction of traditional foam materials.
3Object-affected harmful factors
If the keypad is sealed to reduce noise, then noise attenuation can be achieved, but airflow is restricted and the design is not suitable for ultra-thin systems
Solution Approach 1:
The mesh assembly provides a porous solution that allows airflow to pass through while attenuating noise. The controlled hole patterns in both meshes maintain sufficient open area for air circulation, unlike sealed keypads that completely block airflow. This porous structure enables simultaneous noise reduction and airflow maintenance.
Solution Approach 2:
The mesh assembly provides localized noise attenuation at the fan opening area without affecting the overall airflow paths. The meshes are positioned specifically where noise emanates from the fan, providing targeted noise control while leaving other areas open for airflow, thus maintaining system-level airflow efficiency.
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 mesh assembly significantly reduces whine noise by up to 13 dBm, allowing for improved airflow and compatibility with ultra-thin systems without interfering with fan blades.
Implementation Method 1
The mesh assembly may be provided between the fan and the opening... effectively attenuating the noise
Data Source
AI summary
According to various embodiments, a mesh assembly may be provided. The mesh assembly may include: a first mesh including a plurality of first holes arranged according to a pattern; a second mesh including a plurality of second holes arranged according to the pattern; wherein the second mesh is provided on top of the first mesh; and wherein at least one hole of the plurality of first holes is at least partially obstructed by the second mesh.