Soundproofing Panel Layout for Wideband Absorption in Thin Profiles
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Solution Overview
Problem
Existing soundproofing panels face challenges in effectively absorbing a wide range of sound frequencies while maintaining a reduced thickness, are difficult to address the thickness, and the need for a thin soundproofing panels with reduced thicknesses and capable of absorbing a wide spectrum of sound frequencies.
Innovation Solution
A soundproofing panel design featuring a cover with openings that passes through it, a cover with openings that connect the soundproofing panel with sound-absorbing elements arranged orthogonally to the cover openings, allowing sound waves to enter a space before reaching the absorbing elements, which are modular and can vary in cavity volume and entrance hole dimensions to optimize frequency absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the height of resonator cavities is increased to absorb a broad spectrum of sound frequencies, then the sound absorption performance is improved, but the thickness of the soundproofing panel increases
Solution Approach 1:
The patent transitions from traditional vertical cavity extension (increasing thickness) to horizontal cavity arrangement (utilizing planar area). Sound-absorbing elements are arranged in parallel rows with cavities extending horizontally along the panel surface, allowing broad frequency absorption without increasing panel thickness. This dimensional reorientation enables the panel to maintain thin profile while achieving comprehensive sound frequency absorption.
2Adaptability or versatility
If the volume of resonator cavities is increased to absorb lower frequencies, then the sound absorption performance is improved, but the overall size of the panel increases
Solution Approach 1:
The patent divides the sound absorption function into multiple independent sound-absorbing elements arranged in parallel rows. Each element contains a cavity of specific volume optimized for particular frequency ranges. This segmentation allows the panel to achieve comprehensive frequency absorption through distributed smaller cavities rather than requiring a single large cavity, thereby maintaining compact panel area while preserving low frequency absorption capability.
3Ease of manufacture
If traditional Helmholtz resonators are used with holes parallel to cover openings, then the structure is simple, but the sound absorption effectiveness is reduced
Solution Approach 1:
The patent employs asymmetric configuration where sound-absorbing elements are positioned at angular orientations relative to the cover openings. The entrance holes of the sound-absorbing elements are oriented perpendicular to the opening direction, creating an asymmetric arrangement that optimizes sound wave interaction. This asymmetric positioning enhances sound absorption effectiveness while maintaining manufacturing simplicity through standardized element designs.
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 design achieves efficient sound absorption across a wide frequency range with minimal thickness, enabling use in habitable environments and devices without increasing overall size, and is aesthetically appealing and cost-effective.
Implementation Method 1
each sound-absorbing element comprises at least one cavity and at least one entrance hole into the cavity. The axis of said entrance hole is perpendicular to said opening direction. The sound-absorbing elements thus conceived act as Helmholtz resonators.
Implementation Method 2
The sound waves enter through the holes, are reflected by the reflective wall and, returning, enter into phase with the incoming wave, dampening it. In this way, the sound waves lose energy by converting into heat.
Data Source
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AI summary
Soundproofing panel (1) comprising a cover (2) provided with at least one opening (3) that passe through it along an opening direction (D) from its external surface (4), which faces onto an environment to be soundproofed (100), to its internal surface (5); a plurality of sound-absorbing elements (6) arranged onto the internal surface (5) of the cover (2), wherein each sound-absorbing element (6) comprises at least one cavity (8) and at least one entrance hole (7) in the cavity (8); the axis (X) of said entrance hole (7) being perpendicular to said opening direction (D); the at least one opening (3) of the cover (2) fluidly connects a space (S) defined by adjacent sound-absorbing elements (6) and by the cover (2) with the environment to be soundproofed (100), so that the sound waves do not enter the sound-absorbing elements (6) directly, but indirectly through said space (S).