Dustproof Acoustic Wall with Micro-Perforated Outer Fabric
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Solution Overview
Problem
Conventional false walls with stretched flexible layers have poor acoustic properties, leading to significant sound wave reflection and reverberation, and existing solutions like micro-perforated sheets are not airtight, dustproof, or moisture-proof, while solid fabrics compromise acoustic performance for frequencies above 300 Hz.
Innovation Solution
A sound-absorbing assembly comprising two parallel canvases, where a solid internal canvas without perforations is paired with a micro-perforated external canvas at a distance of 30-200 mm, with the micro-perforated canvas visible from the room, forming a sealed and acoustically absorbent system with a sound wave absorption coefficient greater than 0.35 for frequencies above 300 Hz, and incorporating luminous means between the canvases for a backlit effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micro-perforated sheets are used to increase sound absorption, then acoustic performance is improved, but the assembly loses airtightness, dustproofing, and moisture-proofing
Solution Approach 1:
The assembly is divided into two distinct fabric layers: a micro-perforated outer fabric for acoustic absorption and a solid inner fabric for sealing. This segmentation allows each layer to perform its specific function optimally without compromising the other.
Solution Approach 2:
The solid inner fabric acts as an intermediary barrier between the micro-perforated outer fabric and the interior space, preventing dust and moisture penetration while allowing the acoustic function of the outer fabric to remain effective.
2Object-affected harmful factors
If solid fabric is used to ensure airtightness and dustproofing, then sealing performance is improved, but acoustic performance for frequencies above 300 Hz deteriorates
Solution Approach 1:
The assembly is divided into two distinct fabric layers: a micro-perforated outer fabric for acoustic absorption and a solid inner fabric for sealing. This segmentation allows each layer to perform its specific function optimally without compromising the other.
3Device complexity
If taut flexible layers are used for false walls, then structural simplicity is maintained, but acoustic properties deteriorate due to sound wave reflection
Solution Approach 1:
The micro-perforated outer fabric introduces porosity to the assembly, enabling sound wave absorption rather than reflection. The micro-perforations allow sound energy to enter the fabric structure and be dissipated, fundamentally changing the acoustic behavior from reflective to absorptive.
Solution Approach 2:
The assembly combines two different fabric types with complementary properties: a micro-perforated fabric for acoustic absorption and a solid fabric for sealing. This composite structure achieves both acoustic performance and sealing functionality that neither fabric could provide alone.
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 provides improved acoustic performance for a wide range of frequencies, including those above 300 Hz, while maintaining a sealed and aesthetically pleasing backlit wall, addressing the limitations of previous technologies.
Implementation Method 1
the external fabric (11) is placed at a distance from the internal fabric (12) of between 30 and 200 millimeters, and characterized in that said outer fabric (11) comprises micro-perforations (2) with a density greater than 1000 micro-perforations/m2 having a diameter less than 0.1 millimeters and arranged to form an acoustic fabric so as to form a sound absorbing assembly
Implementation Method 2
wherein said wall (1) comprising at least said sound-absorbing assembly (10) further comprises luminous means (50, 51, 52) placed between the wall and the inner fabric (11) of the sound-absorbing assembly (10) so as to form a backlit wall
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to an acoustic absorbent assembly (10) used to form a wall element inside a building, that can be fixed to at least one wall in order to form false walls, comprising two parallel fabrics (11, 12) that are assembled on the periphery on an attachment means, said fabrics (11, 12) respectively defining an inner fabric (12) and an outer fabric (11) when the assembly is fixed to the wall, one of the fabrics (12, 11) being free of perforations, the acoustic absorbent assembly (109 being characterised in that the outer fabric (11) is arranged at a determined distance from the inner fabric (12) and comprises micro-perforations (2) arranged so as to form an acoustic fabric.