Sound-Absorbing Panel With Density-Zone Channel
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Solution Overview
Problem
Existing sound-absorbing panels lack sufficient rigidity, which limits their effectiveness in improving room acoustics without increasing weight, dimensions, or modifying their structure.
Innovation Solution
Incorporating a molding core within the panel thickness to create zones of higher material density, forming channels that increase rigidity without altering the panel's overall weight or shape, and allowing for additional versatility through removable support members and edge thickness adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the panel thickness is increased to improve rigidity, then the rigidity is improved, but the weight and dimensions increase
Solution Approach 1:
The patent applies local quality by creating zones of higher material density specifically in the regions between the outer faces and the channel, rather than uniformly increasing density throughout the entire panel. This localized densification provides enhanced rigidity where structurally needed while preserving the overall lightness and thinness of the panel, thus resolving the contradiction between rigidity and weight.
Solution Approach 2:
The patent introduces a channel dimension within the panel thickness, creating a three-dimensional structure with varying density zones. By forming a channel through or within the panel thickness and creating density gradients around it, the invention adds a dimensional aspect to rigidity enhancement without increasing the panel's external dimensions or overall weight.
2Strength
If the material density is uniformly increased to improve rigidity, then the rigidity is improved, but the weight increases
Solution Approach 1:
The patent specifically avoids uniform density increase by creating localized high-density zones only in the regions between the outer faces and the channel. The material density varies spatially, being higher near the channel and lower in other regions, which provides rigidity enhancement without the penalty of overall weight increase that would result from uniform densification.
3Strength
If the panel structure is modified to increase rigidity, then the rigidity is improved, but the sound-absorbing characteristics and handling properties deteriorate
Solution Approach 1:
The patent maintains sound-absorbing characteristics by limiting structural modifications to localized density variations that do not compromise the overall porous structure needed for acoustic performance. The high-density zones are confined to specific regions and do not eliminate the sound-absorbing functionality of the panel while still providing the needed rigidity enhancement.
Solution Approach 2:
The patent segments the panel into regions of different density - high-density zones near the channel and lower-density regions elsewhere. This segmentation allows different parts of the panel to serve different functions: the high-density zones provide rigidity while the lower-density zones maintain sound-absorbing properties, thus resolving the contradiction between structural strength and acoustic performance.
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 enhances the panel's rigidity and versatility while maintaining its sound-absorbing and handling characteristics, allowing for improved acoustic performance without structural modifications or increased weight.
Implementation Method 1
Sound-proofing materials have the property that they absorb at least a part of the acoustic energy and reduce the amount of reflected energy
Data Source
AI summary
A sound-absorbing panel comprising a padding layer comprising heat-bonded synthetic fibers is described. The sound-absorbing panel has a first outer face and a second outer face which are spaced from each other so as to form a panel thickness between them. The sound-absorbing panel also comprises a channel within the panel thickness. The padding material between at least one of the outer faces of the panel and the channel has a density greater than the density of the padding material far from the channel so that the panel is more rigid in the region of said channel.