Speaker Magnetic Vibration Element with Dual Annular Yokes
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Solution Overview
Problem
Prior art speakers suffer from sound distortion and poor low-frequency sound quality due to a magnetic vibration element with a smaller size, which limits their ability to produce larger sounds without operating at full power and results in inadequate impact distance for lower frequencies.
Innovation Solution
A speaker design featuring a larger diameter magnetic vibration element with a longer impact length, achieved through the use of an inner and outer annular yoke configuration that allows the voice coil to have a greater pushing force without full power operation, reducing non-linear distortion in low frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetic vibration element is made smaller, then the device complexity is reduced, but the sound quality in low frequency deteriorates and the impact distance is short
Solution Approach 1:
The magnetic vibration element is divided into two separate components: an inner annular yoke and an outer annular yoke. The inner yoke is positioned above the voice coil while the outer yoke is positioned below, with a gap between them. This segmentation allows each yoke to be optimized independently for magnetic flux generation and distribution, achieving better low-frequency sound quality without increasing the overall device complexity.
Solution Approach 2:
A magnetic gap is introduced as an intermediary between the inner and outer annular yokes. This gap serves as a magnetic flux path that connects the two yokes, allowing the magnetic field to effectively interact with the voice coil while maintaining the separated structure. The gap acts as a mediator that enables the two-yoke system to function as a unified magnetic vibration element with improved low-frequency performance.
2Length of moving object
If the magnetic vibration element is made larger, then the impact distance is increased and low frequency sound quality is improved, but the device complexity increases
Solution Approach 1:
The magnetic vibration element is segmented into inner and outer annular yokes positioned on opposite sides of the voice coil. This segmentation allows the system to achieve a larger effective impact distance through the combined magnetic field of both yokes, while each individual yoke remains relatively simple in structure, thus avoiding the complexity increase that would result from a single large yoke.
Solution Approach 2:
Instead of increasing the size of a single magnetic vibration element in one dimension, the invention adds a second dimension by introducing another yoke on the opposite side of the voice coil. This dimensional expansion allows the system to achieve greater impact distance through the combined magnetic field coverage of both yokes, while keeping each individual component compact and simple.
3Power
If the speaker operates at full power to produce larger sounds, then the sound volume is increased, but sound distortion occurs and sound quality cannot be retained
Solution Approach 1:
The magnetic field distribution parameters are changed by introducing two separate annular yokes with different positions and sizes. The inner yoke has a smaller radius and is positioned closer to the voice coil, while the outer yoke has a larger radius and is positioned farther away. This parameter change allows the magnetic field to be more uniformly distributed across the vibration membrane, enabling the speaker to produce larger sounds without distortion while maintaining sound quality.
Solution Approach 2:
The magnetic vibration element is constructed as a composite structure combining two different annular yoke components with complementary magnetic properties. The inner and outer yokes work together as a composite magnetic system that provides a more uniform and controlled magnetic field distribution, allowing the speaker to operate at higher power levels without sacrificing sound quality or experiencing distortion.
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 maintains good sound quality even at higher volumes and improves low-frequency response without full power operation, reducing distortion and enhancing sound pressure while maintaining resonance frequency integrity.
Implementation Method 1
When the voice coil is conducted, it is interacted with the magnetic vibration element so that the voice coil is interacted with the magnetic vibration element. Therefore the voice coil will push the vibration membrane and thus air vibrates to emit sound.
Implementation Method 2
The inner annular yoke being a magnetic device for magnetic induction; the outer annular yoke being a magnetic device for magnetic induction
Data Source
AI summary
A voice emitting device of a speaker is provided. The magnetic vibration element is a larger diameter and thus has a greater driving force. In use, if a greater voice is needed, the structure provided may achieve the effect without operation at full power. Because even the voice emitting device is not worked in full power, the sound quality is good. Furthermore, because the magnetic vibration element of the voice emitting device is larger, a longer impact length is provided. Therefore the response in a low frequency is good and thus the sound quality in lower frequency is not affected.