Passive Radiator Module Dual-Surface Cavity Design
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Solution Overview
Problem
Existing passive radiator modules in loudspeaker systems are bulky, limited in function, and primarily improve bass without efficiently utilizing space, leading to suboptimal low-frequency performance.
Innovation Solution
A passive radiator module design featuring a cavity with two radiators on opposite surfaces, each with a hang edge and surrounding part, optimized for balanced force distribution and improved space utilization, allowing for enhanced low-frequency characteristics and compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single passive radiator is used to improve bass, then low-frequency performance is enhanced, but the module occupies large volume and has limited functionality
Solution Approach 1:
The passive radiator is divided into two separate radiators (first and second passive radiators) positioned on opposite sides of the cavity. This segmentation allows each radiator to contribute to bass output independently while sharing the volume burden, achieving enhanced low-frequency performance within a compact form factor
Solution Approach 2:
The patent transitions from a single-plane radiator configuration to a three-dimensional arrangement with radiators on both upper and lower surfaces of the cavity. This dimensional expansion utilizes vertical space efficiently, improving bass output without increasing the horizontal footprint of the module
2Power
If the resonance frequency is reduced to improve bass, then low-frequency penetration is enhanced, but the radiator structure becomes larger
Solution Approach 1:
By segmenting the passive radiator into two smaller radiators positioned on opposite sides of the cavity, each radiator can maintain smaller dimensions while collectively achieving the desired low-frequency penetration through coordinated operation and reduced resonance frequency
3Power
If the radiation area is increased to improve bass, then low-frequency output is enhanced, but the module occupies more space
Solution Approach 1:
The patent utilizes both upper and lower surfaces of the cavity for radiator placement, effectively doubling the radiation area available for bass output. This three-dimensional arrangement increases the total radiating surface without proportionally increasing the module's external dimensions
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 improves space utilization and low-frequency performance, enabling the development of ultra-thin loudspeaker systems with reduced material needs and efficient heat dissipation for components like power amplifiers and DSP chips.
Implementation Method 1
The purpose of the passive radiator in the loudspeaker system is to enhance the bass and low-frequency penetration
Data Source
AI summary
A passive radiator module includes a cavity and two passive radiators, and the two passive radiators are disposed on an upper surface and a lower surface of the cavity respectively. Each of the two passive radiators includes a hang edge, a surrounding part and a diaphragm, the surrounding part surrounds the diaphragm, and the surrounding part is positioned between the hang edge and the diaphragm. Each of the upper surface and the lower surface includes a hollow part, the hang edge of any one of the two passive radiators is connected to a corresponding one of the upper surface and the lower surface, and the diaphragm of said any one of the two passive radiators is positioned in the hollow part of the corresponding one of the upper surface and the lower surface.