Noise-absorbing Component with Embedded Elements
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Solution Overview
Problem
Current sound-absorbing components for noise protection fail to achieve high mechanical strength and weather resistance while maintaining effective sound absorption across a wide frequency range, particularly in outdoor environments exposed to wind and vandalism.
Innovation Solution
The sound-absorbing component combines a cover layer with low absorption but high mechanical strength and embedded sound-absorbing elements, utilizing diffraction edges at the interfaces between materials to enhance absorption, with the sound-absorbing elements partially or fully embedded and framed by a sound-reflecting material to maximize absorption without increasing weight or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous layer of rock wool or fibrous material is used for sound absorption, then sound absorption properties are improved, but mechanical strength and weather resistance deteriorate
Solution Approach 1:
The continuous layer of rock wool is segmented into individual sound-absorbing elements (plates, blocks, or granules) that are distributed within the concrete matrix. This segmentation allows the concrete to provide mechanical strength and weather resistance while the distributed sound-absorbing elements maintain acoustic performance.
Solution Approach 2:
The invention creates a composite material by combining concrete (providing mechanical strength and weather resistance) with sound-absorbing elements (providing acoustic absorption). The concrete matrix embeds and protects the sound-absorbing elements, creating a material that exhibits both structural and acoustic properties simultaneously.
2Reliability
If the overall thickness of the panel element is increased to achieve usable absorption properties, then sound absorption is improved, but device complexity and weight increase
Solution Approach 1:
Instead of uniformly increasing thickness throughout the entire panel, the sound-absorbing elements are locally distributed within the concrete matrix. This allows sound absorption to be achieved through the internal structure rather than external thickness, maintaining a slim overall profile while providing effective absorption.
Solution Approach 2:
The concrete matrix is designed with porous characteristics and embedded sound-absorbing elements that enable effective sound absorption within a reduced thickness. The porous structure allows sound waves to penetrate and be absorbed by the distributed elements without requiring a thick panel.
3Duration of action of stationary object
If sintered expanded glass is used for sound absorption, then weather resistance is improved, but mechanical strength deteriorates due to susceptibility to mechanical stress
Solution Approach 1:
The invention creates a composite structure where sintered expanded glass elements are embedded within a concrete matrix. The concrete provides the mechanical strength and resistance to stress, while the sintered expanded glass provides weather resistance and sound absorption. Each material compensates for the other's weaknesses.
Solution Approach 2:
The concrete matrix acts as a protective cushioning medium that surrounds and protects the fragile sintered expanded glass elements from mechanical stress. This pre-protection prevents damage during assembly and service, allowing the use of weather-resistant but mechanically vulnerable materials.
4Reliability
If highly profiled sound-absorbing profiles are used to improve sound insulation, then sound absorption is improved, but weight and overall wall thickness increase
Solution Approach 1:
The invention uses porous concrete with embedded sound-absorbing elements that provide effective sound insulation without requiring heavy, highly profiled structures. The porous structure enables sound waves to penetrate and be absorbed, achieving good insulation with reduced weight and thickness.
Solution Approach 2:
By combining concrete with distributed sound-absorbing elements, the invention achieves effective sound insulation through material composition rather than heavy profiling. This composite approach provides the necessary acoustic performance with significantly reduced weight compared to traditional highly profiled structures.
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
This design results in slim, weather-resistant, and impact-resistant sound-absorbing components with significantly improved absorption in the low-frequency range, achieving high total absorption values while reducing material costs and maintaining structural integrity.
Implementation Method 1
sound-absorbing elements embedded therein with a significantly higher absorption coefficient than that of the surface layer
Implementation Method 2
utilizing diffraction edges at the interfaces between materials to enhance absorption
Data Source
Figure 1~5
Figure 6~8
AI summary
The invention relates to a noise-absorbing component, in particular for outdoor use, comprising a noise-absorbing cover layer (03) and noise absorbers (06) which are embedded into the cover layer and which have an increased degree of absorption compared to the cover layer (03). The cover layer surface, which is oriented in the direction of the noise source, is flat, and the noise absorbers (06) are mutually spaced. An open absorption surface of the noise absorbers lies on a plane parallel to the surface of the cover layer, and the surface area which is occupied by the noise absorbers (06) is smaller than the surface area which is not occupied by the noise absorbers on said plane. The invention also relates to a noise-protection wall comprising a support layer (02) and numerous noise-absorbing components attached to the support layer.