Sound Absorption Panel Using Adhesive-Permeated Felt and Honeycomb
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Solution Overview
Problem
Inorganic fiber-based sound absorption materials, such as those made from glass fiber, rock wool, or ceramic, tend to scatter and cause skin irritation, while also lacking in flatness and self-standing performance, which complicates their use as effective sound absorption panels.
Innovation Solution
A sound absorption panel is created by stacking a felt-like fiber material with a honeycomb material and a perforated plate, using a water-soluble adhesive to integrate the fibers and reinforce the structure, preventing fiber scattering and enhancing air permeability and self-standing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chemical fixing method is used for surface treatment to prevent fiber scattering, then fiber scattering and skin irritation are reduced, but air permeability and porosity are compromised causing clogging
Solution Approach 1:
The patent introduces an intermediary substance (adhesive or coating material) that mediates between the fiber surface and the external environment. This intermediary layer prevents fiber scattering and skin irritation while maintaining air permeability by allowing air to pass through the coating or adhesive matrix, thus resolving the contradiction between harmful fiber exposure and air flow requirements
Solution Approach 2:
The patent employs porous materials for surface treatment or coating that allow air to pass through while preventing fiber scattering. The porous structure maintains porosity and air permeability necessary for sound absorption function, while the material itself prevents fiber detachment and skin contact, solving both requirements simultaneously
2Reliability
If felt-like fiber material is used for sound absorption, then sound absorption function is achieved, but flatness and self-standing performance are lacking
Solution Approach 1:
The patent creates a composite structure by combining felt-like fiber material with rigid or semi-rigid supporting materials (such as boards, panels, or framing structures). This composite approach maintains the sound absorption properties of the soft felt material while providing the flatness and self-standing performance required for practical application, resolving the contradiction between acoustic function and structural stability
Solution Approach 2:
The patent addresses the lack of self-standing performance by adding a structural dimension or support framework beneath or behind the felt material. This additional dimensional support allows the soft felt to maintain its sound absorption function while the rigid support structure provides the necessary flatness and self-standing capability, separating the acoustic and structural functions into different dimensions
3Quantity of substance
If inorganic fiber is used instead of metal fiber, then cost is reduced, but fiber scattering and skin irritation problems arise
Solution Approach 1:
The patent uses an intermediary coating or adhesive layer over the inorganic fiber material to prevent direct skin contact and fiber scattering. This intermediary substance allows the use of cheaper inorganic fibers while eliminating the harmful effects through the protective barrier, maintaining cost-effectiveness without sacrificing safety
Solution Approach 2:
The patent applies flexible shells or thin film coatings over the inorganic fiber material to encapsulate the fibers and prevent scattering. This thin film barrier protects against skin irritation while allowing the underlying inorganic fiber structure to maintain its cost advantages and sound absorption properties
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 effectively prevents fiber scattering and skin irritation, improves self-standing performance, and reduces costs by half compared to existing aluminum fiber-based solutions, while maintaining high sound absorption performance across a wide frequency band.
Implementation Method 1
a felt-like fiber material and a honeycomb material as part of the panel structure are arranged adjacent to each other and joined with an adhesive
Implementation Method 2
the adhesive extends over an entire surface of the felt-like fiber material exposed at a hole portion of the perforated plate to fix a fiber near a surface
Data Source
AI summary
In a sound absorption panel formed by stacking a plate perforated with a hole having a hole size smaller than a fiber length such as expanded metal, a honeycomb material, and felt-like fiber between the perforated plate and the honeycomb material, and joining the perforated plate, the felt-like fiber, and the honeycomb material to each other with an adhesive, the adhesive applied to the perforated plate is permeated into a surface of the felt-like fiber exposed from the hole to fix the fiber on the surface.