Tunable Wall Resonance Absorber for Multi-Wall Soundproofing
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Solution Overview
Problem
Existing construction elements fail to provide effective soundproofing across different types of walls due to the need for specific dynamic absorbers tailored to each wall type, leading to inefficiencies and increased costs.
Innovation Solution
A versatile resonance absorber designed to alternate between two distinct resonance frequencies, allowing it to be adapted for different wall types by adjusting its position, which includes a blade with a mass oscillating between fixed ends, and a support system that can be secured to the wall, optimizing sound absorption across various frequency spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dynamic absorber is designed for a specific wall type, then it can effectively attenuate the breathing frequency of that wall type, but it cannot be used for other wall types and requires multiple different absorber designs
Solution Approach 1:
The support is designed with multiple positioning configurations that allow the same dynamic absorber to be adapted to different wall types and breathing frequencies. The support can be positioned at different locations along the blade, enabling a single absorber design to serve multiple wall configurations effectively.
Solution Approach 2:
The support is made movable along the blade rather than being fixed at a single position. This dynamic positioning capability allows the resonant frequency of the absorber to be adjusted by changing the support position, enabling the same absorber to match different breathing frequencies of various wall types.
2Reliability
If different types of dynamic absorbers are used for different wall types, then each wall type can be optimized, but the device complexity and variety of components increases
Solution Approach 1:
A single dynamic absorber design with a movable support can replace multiple specialized absorber designs. The support can be positioned at different locations to match different breathing frequencies, allowing one absorber type to perform the function of what would otherwise require multiple different absorber types.
Solution Approach 2:
The resonant frequency of the dynamic absorber is adjusted by changing the position of the support along the blade rather than by designing different absorbers. This parameter change (position) allows the same physical structure to adapt to different acoustic requirements of various wall types.
3Ease of manufacture
If the support position is fixed, then the manufacturing and installation is simplified, but the absorber cannot be tuned to different breathing frequencies
Solution Approach 1:
The support is designed to be movable along the blade during installation, allowing the installer to position the support at the appropriate location to match the specific breathing frequency of the wall. Once positioned, the support can be secured to maintain the optimal configuration.
Solution Approach 2:
The blade is designed with predefined positioning features or markers that guide the support to the correct position before final securing. This preliminary positioning action simplifies the installation process by providing clear guidance on where to place the support for optimal 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 enables effective soundproofing by tuning the resonance absorber to specific breathing frequencies of different wall types, enhancing acoustic insulation while minimizing the number and cost of dynamic absorbers required.
Implementation Method 1
The blade and the mass are capable of oscillating jointly around at least one equilibrium position... the resonance absorber has a first resonance frequency and a second resonance frequency
Implementation Method 2
The blade behaves like a spring coupling the mass to the support
Implementation Method 3
Such a dynamic absorber reduces the acoustic transparency of the walls in the low frequency range by energy pumping
Implementation Method 4
the support is configured to alternately adopt at least a first position of use relative to the blade in which the resonance absorber has a first resonance frequency and a second position of use relative to the blade in which the resonance absorber has a second resonance frequency
Data Source
Figure 1
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AI summary
Resonance absorber (3) for a construction wall (2), the resonance absorber (3) comprising at least one blade (100), a support (200) and a mass (300) carried by the blade (100), the support (200) being intended to be fixed to the construction wall (2), characterized in that the support (200) is configured to adopt alternately at least a first position of use relative to the blade (100) in which the resonance absorber (3) has a first resonance frequency and a second position of use relative to the blade (100) in which the resonance absorber (3) has a second resonance frequency.