Open Earphone Sound Production Component Positioning for Acoustic Performance
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Solution Overview
Problem
Existing open earphones fail to balance output performance and wearing comfort, often blocking the ear canal and providing unstable fit due to inadequate design that accommodates individual ear shapes and sizes.
Innovation Solution
The open earphone design features a sound production component and ear hook with specific geometric ratios and projections to ensure the sound production component is positioned close to the ear canal without blocking it, using a suspension structure that fits the ear's contours, including the inferior concha, to create a cavity-like structure for improved sound leakage cancellation and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the sound production component is positioned close to the ear canal to improve output performance, then the listening volume is enhanced, but the ear canal opening may be blocked
Solution Approach 1:
The earphone design positions the sound production component to specifically target the inferior concha region with precise geometric ratios (0.35-0.6 for vertical distance ratio, 13-38mm for horizontal distance), creating localized sound delivery without blocking the ear canal opening. This localized positioning strategy enhances output performance at the target area while avoiding harmful blockage effects.
2Manufacturing precision
If a fixed earphone design is used to simplify manufacturing, then manufacturing precision is improved, but the fit stability varies for different ear shapes and sizes
Solution Approach 1:
The patent defines specific parameter ranges for the earphone geometry (vertical distance ratio 0.35-0.6, horizontal distance 13-38mm) that can accommodate variations in ear shapes and sizes. By optimizing these geometric parameters, the design achieves both manufacturing consistency and adaptability to individual user differences without requiring complex adjustable mechanisms.
3Adaptability or versatility
If the earphone structure is made more complex to accommodate individual ear variations, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The earphone design segments the positioning into two independent geometric parameters: vertical distance ratio (0.35-0.6) and horizontal distance (13-38mm). This segmentation allows the complex adaptability requirement to be broken down into manageable design dimensions, simplifying manufacturing while maintaining versatility for different ear shapes and sizes.
Data Source
AI summary
An open earphone comprising a sound production component and an ear hook is provided. The ear hook includes a first portion and a second portion. The first portion is hung between an auricle and the head of a user, the second portion extends toward a front outer side of the auricle and connects to the sound production component, and the sound production component is located close to an ear canal but does not block the ear canal opening. The open earphone and the auricle have a first projection and an eighth projection on a sagittal plane, respectively, a centroid of a portion of the first projection corresponding to the sound production component have a first distance to a highest point of the eighth projection in a vertical axis direction, and a ratio of the first distance to a height of the eighth projection is within a range of 0.35-0.6