Multi-Strand Voice Coil for Loudspeaker Sound Quality
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Solution Overview
Problem
Existing loudspeakers face limitations in sound quality due to distortion caused by a single enameled wire voice coil, resulting in low output power and high power consumption, which fails to meet the demands for miniaturization and high sound quality in modern electronic devices.
Innovation Solution
A multi-strand independent input-output voice coil is developed, formed by synchronizing and insulating multiple enameled wires, which are wound to create a potted coil with independent current input and output ends, controlled by an ICE chip to drive different sound frequencies separately, reducing interference and improving sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single enameled wire voice coil is used, then the structure is simple and easy to manufacture, but the sound quality is distorted and low due to inertia and frequency interference
Solution Approach 1:
The voice coil is segmented into multiple independent enameled wires (at least two) wound in parallel on the same former. Each wire operates independently to drive the vibrating diaphragm, reducing the overall inertia and minimizing frequency interference. This segmentation allows each wire to handle specific frequency ranges more effectively, improving sound quality while maintaining manufacturing simplicity through the parallel winding process.
2Device complexity
If a single enameled wire voice coil is used, then the device complexity is low, but the output power is low and power consumption is high
Solution Approach 1:
Multiple enameled wires are merged into a parallel configuration on the same voice coil former, creating a multi-strand voice coil system. This merging approach combines the electrical pathways while maintaining mechanical unity through the shared former and vibrating diaphragm connection. The parallel configuration reduces electrical resistance and increases current-carrying capacity, thereby increasing output power without significantly increasing device complexity.
Solution Approach 2:
The independent enameled wires are controlled to operate in periodic coordination through the ICE chip, with each wire potentially optimized for specific frequency ranges. This periodic action allows the voice coil system to efficiently handle different frequency components of audio signals, improving overall power utilization and reducing power consumption while maintaining high output power across the full audio spectrum.
3Volume of moving object
If a single enameled wire voice coil is used, then the structure is compact, but sound quality improvement is limited due to distortion
Solution Approach 1:
The compact voice coil structure is maintained by segmenting the winding into multiple thin enameled wires rather than using a single thick wire. This segmentation reduces the overall volume of the voice coil assembly while improving sound quality through reduced inertia and minimized frequency interference. Each thin wire contributes to the overall magnetic field generation with less mechanical resistance, enabling better sound reproduction within a compact form factor.
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 multi-strand voice coil significantly enhances sound quality by minimizing inertia and frequency interference, leading to clearer and more efficient sound production with lower power consumption, and offers greater applicability and cost-effectiveness across various environments.
Implementation Method 1
When an alternating audio current flows through the voice coil, the voice coil is enabled to generate an alternating current varying with audio, and magnetic lines are cut to generate mechanical vibration
Data Source
AI summary
Disclosed is a multi-strand independent input-output voice coil. The voice coil is a potted coil, which is formed by winding in the following steps: a. forming a multi-strand flat cable by synchronizing and juxtaposing at least two enameled wires; b. winding the multi-strand flat cable to form the potted coil, each enameled wire including independent current input and output ends; and c. under the control of an ICE chip, forming, by the enameled wires together, a multiple-input multiple-output electrical connection end to correspond to vibration drive control of sounds at different frequencies separately. During use, the independent current input and output ends of the enameled wires reduce impact of inertia in vibration of a vibrating diaphragm and impact of a frequency and current on a sound during a change in a volume or tone. Quality of a sound made by the loudspeaker is notably improved.