Sound Insulation Plate With Patterned Frame and Elastic Membrane
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Solution Overview
Problem
Conventional sound insulators are heavy due to high density, making them ineffective for blocking low-frequency noise, as they require increased thickness to achieve soundproofing, which further increases weight and complicates weight reduction.
Innovation Solution
A lightweight sound insulation plate with a patterned frame and elastic membrane, where the central and peripheral pattern regions have opposite displacement directions at resonant frequency, effectively converting airborne sound waves into elastic waves, thereby blocking low-frequency noise without significant weight increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sound insulators (sheet steel, synthetic rubber, drywall) are used to block low frequency noise, then sound insulation performance is improved, but weight increases significantly
Solution Approach 1:
The sound insulator is segmented into a lightweight core structure covered by elastic membranes, replacing conventional dense monolithic materials. The core is divided into cellular or laminated sections filled with sound-absorbing material, allowing effective sound blocking without requiring high overall density.
Solution Approach 2:
The invention uses composite construction combining lightweight materials (such as honeycomb structures, laminated boards, or cellular cores) with elastic membrane coverings. This composite approach provides effective sound insulation for low frequencies while maintaining low weight, overcoming the limitation of conventional single-material sound insulators.
2Reliability
If thickness of sound insulator is increased to block low frequency noise, then sound insulation performance is improved, but weight and volume increase
Solution Approach 1:
Instead of increasing overall thickness, the sound insulator uses a segmented core structure with sound-absorbing material distributed in cellular or laminated sections. This segmentation allows effective low-frequency noise blocking within a compact volume without requiring uniform thickness increase throughout the entire insulator.
Solution Approach 2:
The sound-absorbing material is concentrated in specific locations within the core structure where it is most effective, rather than uniformly distributed. The elastic membranes are tensioned specifically at critical areas to maximize sound blocking efficiency, allowing reduced overall volume while maintaining 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 sound insulation plate effectively blocks low-frequency noise while reducing system weight and volume, and can cover various frequency ranges by adjusting the patterned frame size and arrangement.
Implementation Method 1
an elastic membrane mounted on the patterned frame and blocking passage of air while converting airborne sound waves into elastic waves
Implementation Method 2
at a resonant frequency of the sound insulation plate, a direction of displacement of a portion of the elastic membrane within the central pattern region is opposite to a direction of displacement of a portion of the elastic membrane within the peripheral pattern regions
Data Source
AI summary
A sound insulation plate includes a patterned frame and an elastic membrane, wherein the patterned frame includes a central pattern region and multiple peripheral pattern regions arranged around the central pattern region, the multiple peripheral pattern regions being separated from the central pattern region by a separation bar, and wherein the elastic membrane is mounted on the patterned frame to block passage of air and converts airborne sound waves into elastic waves.