Loudspeaker Vibration Assembly With Folded Ring Resonance Control
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Solution Overview
Problem
Existing loudspeakers face challenges in achieving high sound pressure levels and wide bandwidths due to impedance mismatch and sound cancellation caused by segmented vibrations, which affect their sound output performance.
Innovation Solution
A vibration component with an elastic element and reinforcing member, featuring specific structural designs such as ring and strip structures, hollow regions, and controlled stiffness, to generate multiple resonance peaks and improve sensitivity across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vibration component uses a simple diaphragm structure, then the device complexity is reduced, but the sound pressure level and bandwidth are limited due to impedance mismatch
Solution Approach 1:
The vibration component is segmented into distinct functional regions: a central region, a folded ring region, and a fixed region. This segmentation allows each region to serve specific purposes - the central region for vibration generation, the folded ring region for impedance matching, and the fixed region for stable support - thereby achieving high sound pressure level without excessive overall complexity
Solution Approach 2:
The vibration component transitions from a traditional two-dimensional diaphragm to a three-dimensional structure by folding the ring region. This dimensional change creates additional vibration modes and resonance peaks, improving bandwidth and sound pressure level while maintaining reasonable structural complexity
2Device complexity
If the vibration component uses a simple diaphragm structure, then the device complexity is reduced, but the bandwidth is limited due to impedance mismatch
Solution Approach 1:
The folded ring region introduces dynamic characteristics to the vibration component, allowing it to adapt to different frequency ranges. The folded structure creates multiple resonance peaks across the audible spectrum, enabling the component to maintain effectiveness across a wide bandwidth rather than being optimized for a single frequency range
Solution Approach 2:
By changing the geometric parameters of the folded ring region (such as fold depth, ring diameter, and material properties), the vibration component can achieve impedance matching across different frequency ranges. This parameter optimization enables wide bandwidth performance without requiring a completely complex structure
3Power
If the vibration component uses segmented vibration structure, then the sound pressure level may be increased, but sound cancellation occurs affecting performance
Solution Approach 1:
Different regions of the vibration component are designed with locally optimized qualities: the central region is optimized for strong vibration generation, the folded ring region for impedance matching and resonance control, and the fixed region for stable support. This local quality differentiation allows each region to contribute positively to sound pressure level without creating harmful interference patterns
Solution Approach 2:
The folded ring region, which could potentially create unwanted segmented vibrations, is designed to convert these into beneficial resonance peaks. By carefully controlling the fold geometry and material properties, the segmented structure generates constructive interference patterns that enhance sound pressure level across the bandwidth rather than causing cancellation
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 enhances sound pressure level and sensitivity by controlling resonance peaks, reducing mass, and avoiding sound cancellation, resulting in a flat sound pressure level curve over a large frequency range.
Implementation Method 1
The elastic element is configured to vibrate in a direction perpendicular to the central region
Implementation Method 2
Vibrations of the reinforcing member and the elastic element generate at least two resonance peaks within an audible range of human ears
Data Source
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AI summary
One or more embodiments of the present disclosure relate to a loudspeaker, comprising a driving component configured to generate a vibration based on an electrical signal; and a vibration component configured to receive the vibration of the driving component to vibrate. The vibration component includes an elastic element and a reinforcing member. The elastic element includes a central region, a folded ring region disposed at a periphery of the central region, and a fixed region disposed at a periphery of the folded ring region. The elastic element is configured to vibrate in a direction perpendicular to the central region. The reinforcing member is connected with the central region. The reinforcing member includes a reinforcing part and a plurality of hollow parts. Vibrations of the reinforcing member and the elastic element generate at least two resonance peaks within an audible range of human ears.