Wearable Speaker Sidewall Opening Positioning for Sound Quality
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Solution Overview
Problem
Wearable portable electronic devices, such as smart watches, face challenges in achieving improved output sound quality due to miniaturization of internal components, leading to poor sound quality during user motion and usage.
Innovation Solution
The design incorporates a body with a speaker and a sidewall featuring an opening connected to a sound output chamber, where the orthogonal projection of the speaker on the base is separated from the orthogonal projection of the opening, and an extending region on the substrate maintains a specific distance from the opening to reduce total harmonic distortion (THD), enhancing sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the smart watch volume is reduced to make it more portable, then the device becomes more wearable and compact, but the output sound quality deteriorates due to miniaturization of internal parts
Solution Approach 1:
The patent applies dimensionality change by moving the speaker from a conventional front-facing position to a side-facing position on the watch body. This spatial reconfiguration allows the speaker to be located at the edge of the watch case, utilizing the side surface area rather than consuming internal volume, thereby maintaining compact form factor while improving acoustic performance through optimized sound wave propagation paths.
Solution Approach 2:
The patent applies local quality by creating a dedicated sound output chamber with specific acoustic characteristics at the speaker's location. The chamber is designed with particular volume, shape, and positioning relative to the speaker diaphragm to optimize sound quality in the local region where sound output occurs, while the rest of the watch maintains its compact design.
2Device complexity
If the speaker is positioned traditionally on the watch body, then the structure is simple, but the total harmonic distortion (THD) value is high resulting in poor sound quality
Solution Approach 1:
The patent introduces a sound output chamber as an intermediary structure between the speaker and the external environment. This chamber acts as an acoustic mediator that modifies and optimizes the sound waves generated by the speaker, reducing harmonic distortion through its specific acoustic characteristics while adding minimal structural complexity.
Solution Approach 2:
The patent applies parameter changes by optimizing the physical parameters of the sound output chamber, including its volume, shape, and positioning relative to the speaker. By carefully selecting these parameters, the system achieves reduced THD values and improved sound quality without requiring overly complex structural modifications.
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 effectively decreases THD values, resulting in improved output sound quality, particularly when the distance is around 3 cm, optimizing low-frequency response and overall sound quality.
Implementation Method 1
A sound wave produced by the speaker is transmitted outward through the opening
Data Source
AI summary
A wearable portable electronic device including a body and a speaker is provided. The body includes a base and a sidewall surrounding the base, wherein the sidewall has at least one opening. The speaker is disposed in the body, wherein a sound wave produced by the speaker is transmitted outward through the opening. An orthogonal projection of the speaker on the base is separated from an orthogonal projection of the opening on the base.