Lightweight Electromagnetic Speaker Assemblies with High Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional microphones and speakers face challenges in achieving high fidelity sound output while striving for smaller size, lower weight, simpler design, lower costs, and improved manufacturing efficiencies, with limited application possibilities.
Innovation Solution
The assembly comprises a first and second surface coupled with electromagnetic/electrostatic field generating and sensitive structures, allowing relative movement between them, often with diaphragms and resilient tethers, and optionally using magnetically sensitive particles or electrically conductive structures to generate sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional voice coil or electrostatic speaker configurations are used, then sound generation is achieved, but the assemblies suffer from higher weight, greater complexity, and higher costs
Solution Approach 1:
The speaker assembly is divided into distinct functional components: a lightweight diaphragm made of thin flexible material, separate electromagnetic field generating structures (coils or electrostatic elements), and suspension elements. This segmentation allows each component to be optimized independently, reducing overall weight and complexity while maintaining functionality
Solution Approach 2:
The patent replaces traditional heavy mechanical speaker assemblies with electromagnetic or electrostatic field-based actuation systems. By using electromagnetic coils or electrostatic fields to drive the diaphragm instead of heavy mechanical mechanisms, the system achieves weight reduction and simplified structure while maintaining sound generation capability
2Volume of moving object
If speaker size is reduced, then portability and form factor are improved, but sensitivity and sound output quality deteriorate
Solution Approach 1:
The patent employs parameter changes in the electromagnetic field generating structures, such as optimizing coil winding densities, adjusting electrostatic field strengths, and tuning resonant frequencies of the diaphragm. These parameter optimizations enable small-sized speakers to achieve high sensitivity by maximizing the efficiency of field-to-mechanical energy conversion within constrained dimensions
Solution Approach 2:
The diaphragm is designed with dynamic suspension elements and flexible mounting that allow it to respond efficiently to electromagnetic or electrostatic actuation. The suspension system provides controlled compliance, enabling the small diaphragm to achieve large excursions and high sensitivity despite its reduced size, while the dynamic design allows tuning of resonant characteristics for optimal performance
3Ease of manufacture
If traditional wound coil structures are used, then magnetic field generation is achieved, but manufacturing complexity and costs increase
Solution Approach 1:
The patent replaces traditional rigid wound coil structures with flexible printed circuit board (FPCB) based electromagnetic elements or electrostatic actuators. These thin-film flexible structures can be manufactured using standard PCB fabrication processes, dramatically simplifying manufacturing compared to hand-winding coils while reducing structural complexity and enabling new form factors
Solution Approach 2:
The patent substitutes mechanical coil winding processes with automated PCB fabrication and thin-film deposition processes. This substitution eliminates the labor-intensive and complex coil winding operation while achieving the same electromagnetic field generation function through planar, manufacturable structures that are easier to produce at scale with consistent quality
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
This configuration enhances sound generation by improving sensitivity, reducing weight and complexity, lowering costs, and enabling various form factors, while allowing for multi-channel sound production and tunable acoustic responses.
Implementation Method 1
a first surface coupled with an electromagnetic/electrostatic field generating structure, and a second surface coupled with an electromagnetic/electrostatic field sensitive structure
Implementation Method 2
a first surface coupled with an electromagnetic/electrostatic field generating structure, and a second surface coupled with an electromagnetic/electrostatic field sensitive structure
Implementation Method 3
a second surface coupled with an electromagnetic/electrostatic field sensitive structure
Implementation Method 4
a second surface coupled with an electromagnetic/electrostatic field sensitive structure
Data Source
AI summary
The invention provides assemblies for production of sound using a plurality of configurations, including in one embodiment, surfaces that may be fixed or moveable relative to each other. These surfaces may be electromagnetic, electrostatic, piezoelectric, transducer implemented, thermally activated, permanently magnetized, or activated by any other arrangement, including but not limited to mechanical activation. The surfaces may in a variety of configurations be free floating, constrained, levitated or combinations thereof. The surfaces themselves may be foldable, rollable, expandable, specialized or any combinations thereof.