Dual-Speaker Earphone Layout for Better Driver Coupling
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Solution Overview
Problem
Poor coupling between speakers in multi-driver headphones leads to degradation in sound quality.
Innovation Solution
A headphone design with a first speaker and a second speaker, where the magnetic circuit systems of the speakers are arranged to repel each other, and the speakers have partially overlapping vibration directions, with separate sound outlets to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple speakers are used in a multi-driver configuration, then sound quality and auditory experience are improved, but coupling performance between speakers deteriorates leading to sound quality degradation
Solution Approach 1:
The patent applies dimensional change by arranging magnetic circuit systems in the vertical direction (thickness direction) with overlapping projections. The first magnetic circuit system is positioned closer to the ear canal, while the second magnetic circuit system is positioned farther away, creating a layered vertical arrangement that improves coupling performance without increasing horizontal space requirements.
Solution Approach 2:
The patent employs asymmetric arrangement where the first speaker and second speaker are positioned at different distances from the ear canal opening. The first speaker is closer to the ear canal while the second speaker is farther away, creating an asymmetric spatial configuration that optimizes sound coupling and frequency distribution among multiple drivers.
2Reliability
If magnetic circuit systems are arranged closer together to improve coupling, then sound quality improves, but magnetic interference between speakers increases
Solution Approach 1:
The patent converts the potentially harmful magnetic interference into a beneficial coupling effect by carefully designing the vertical arrangement and spacing of magnetic circuit systems. The overlapping projections of magnetic circuit systems in the thickness direction create controlled magnetic field interaction that enhances sound coupling while maintaining frequency separation, transforming what could be interference into a useful coupling mechanism.
Solution Approach 2:
The patent resolves magnetic interference by transitioning from horizontal to vertical arrangement of magnetic circuit systems. By positioning them at different distances from the ear canal in the thickness direction with overlapping projections, the design allows magnetic fields to interact constructively for coupling while maintaining spatial separation that prevents excessive interference.
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
Improves sound quality by enhancing sound wave propagation and reducing interference, resulting in improved auditory experience.
Implementation Method 1
The second magnetic circuit system and the first magnetic circuit system are arranged to repel each other
Data Source
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AI summary
The present disclosure relates to a headphone, and specifically relates to the technical field of electronic devices. The headphone includes a first speaker and a second speaker. A frequency band of a sound output by the first speaker is at least partially lower than a frequency band of a sound output by the second speaker. The first speaker includes a first diaphragm and a first magnetic circuit system configured to drive the first diaphragm to produce the sound. The second speaker includes a second diaphragm and a second magnetic circuit system configured to drive the second diaphragm to produce the sound. A projection of the first magnetic circuit system in a vibration direction of the first diaphragm at least partially overlaps the second magnetic circuit system. The second magnetic circuit system and the first magnetic circuit system are arranged to repel each other.