Built-in Housing Sound-permeable Inserts Noise Reduction
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Solution Overview
Problem
Built-in housings for air inlets and outlets in buildings often act as resonance chambers, amplifying noise from supply air and exhaust air elements and air flows, which are then released into the room, leading to unwanted noise emission.
Innovation Solution
The installation housing features sound-permeable inserts in its walls, allowing sound waves to escape through recesses lined with materials like polymer film or foam, preventing resonance and maintaining airtightness without the need for additional sound-insulating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the housing opening is covered with a screen, then the visual appeal is improved, but the housing forms a resonance chamber that amplifies noise
Solution Approach 1:
The housing walls are segmented by creating recesses that are lined with sound-permeable inserts. This segmentation allows sound waves to escape through specific localized areas while maintaining the overall structure and visual appearance of the housing when covered with a screen.
Solution Approach 2:
Sound-permeable inserts are introduced as intermediary elements within the housing walls. These inserts act as mediators that allow sound waves to pass through the housing structure without requiring the removal of the screen, thus resolving the conflict between visual appeal and noise reduction.
2Object-generated harmful factors
If sound-insulating material is used for interior lining, then noise is reduced, but the housing dimensions increase
Solution Approach 1:
Instead of using sound-insulating material to block sound from escaping, the invention uses sound-permeable inserts that allow sound to escape through the housing walls. This inverted approach achieves noise reduction without requiring additional space for insulation material.
Solution Approach 2:
Sound-permeable inserts made from porous or acoustically transparent materials are used in the housing walls. These materials allow sound waves to pass through while maintaining the structural integrity and compact dimensions of the housing.
3Object-generated harmful factors
If recesses are created in housing walls for inserts, then sound waves can escape, but the rigidity of the housing may be impaired
Solution Approach 1:
The housing walls have different local qualities: areas with sound-permeable inserts allow sound escape, while other areas maintain full structural rigidity. The recesses are strategically positioned and sized to minimize impact on overall housing strength while achieving adequate noise reduction.
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 effectively reduces noise emission within the building by allowing sound waves to exit through the inserts, ensuring the ventilation function is not compromised and minimizing housing dimensions.
Implementation Method 1
The at least one sound-permeable insert (6) replaces an originally sound-reflecting area of the at least one housing wall (2). Sound waves generated by the supply air or exhaust air elements and/or an air flow can leave the installation housing (1) through the at least one recess (20) lined with a sound-permeable insert (6).
Implementation Method 2
The essentially airtight configuration of the at least one insert ensures that the ventilation function is not restricted and no air escapes from the installation housing or is sucked in via the insert.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a built-in housing for supplying or extracting air from or into a room of a building, comprising housing walls, at least one pipe connection for an air duct, a housing opening facing the room, and a cover plate arranged at the housing opening. The object of the invention is therefore to provide a built-in housing for supplying or extracting air from or into a room of a building, which reduces the emission of noise from a supply or exhaust air element integrated into the built-in housing and/or noise induced by airflows within the built-in housing into the room of the building. This object is achieved by providing at least one of the housing walls (2) with at least one recess, and by covering this recess with a sound-permeable insert (6) in a substantially airtight manner. (Fig. 1)