Rotatable Sound Adjusting Element for Earphone Acoustic Tuning
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Solution Overview
Problem
Existing earphones are limited to a single sound characteristic, failing to adapt to individual user preferences and varying environments, necessitating an adjustable frequency response.
Innovation Solution
An earphone design featuring a sound adjusting element with rotatable mode posts and sound holes, allowing adjustment of the front acoustic cavity's volume and area, enabling changes in middle and high-frequency responses to accommodate different sound styles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the earphone uses a fixed structure, then the manufacturing cost is low and the structure is simple, but the sound quality cannot be adjusted to meet different user requirements
Solution Approach 1:
The patent implements a rotatable sound adjusting element that can dynamically change the earphone's acoustic characteristics. The element features multiple sound adjusting holes arranged in different patterns, allowing users to rotate and select different hole configurations to adjust the front acoustic cavity's sound hole area and volume, thereby achieving variable sound quality without complex electronic components
Solution Approach 2:
The patent changes physical parameters of the acoustic system by providing sound adjusting holes with different cross-sectional shapes (circular, fan-shaped, racetrack-shaped) and different arrangements. Rotating the sound adjusting element selects different hole configurations, which directly changes the sound hole area and front acoustic cavity volume parameters, enabling frequency response adjustment for different sound styles
2Adaptability or versatility
If the earphone uses a fixed structure, then the device is simple to manufacture, but it cannot adapt to different user preferences and environments
Solution Approach 1:
The sound adjusting element serves multiple functions: it acts as a decorative front housing component, a mechanical adjustment mechanism, and an acoustic parameter controller. By integrating these functions into a single rotatable component with differently shaped sound holes, the patent enables the earphone to adapt to different user preferences and environments without requiring separate adjustment mechanisms for each function
3Adaptability or versatility
If the sound hole area and cavity volume are made adjustable, then different frequency responses can be achieved, but the structure becomes more complex
Solution Approach 1:
The sound adjusting element is segmented into multiple sound adjusting holes (center hole and peripheral holes) that can independently contribute to the acoustic output. By rotating the element, different combinations of these segmented holes are activated, allowing granular control over the sound hole area and frequency response characteristics without requiring a completely different acoustic chamber design
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 earphone achieves customizable sound quality by altering the sound hole area and volume, providing multiple sound styles to meet diverse user requirements with a simple and cost-effective structure.
Implementation Method 1
the mode adjustment groove is limited by different mode posts by rotating the sound adjusting element on the front housing, so as to adjust the area of a sound hole for the front acoustic cavity and the volume of the front acoustic cavity of the earphone
Data Source
AI summary
An earphone, comprising a rear housing, a front housing, and a loudspeaker unit which divides a cavity formed by the rear housing and the front housing into a front and rear acoustic cavities; wherein the earphone further comprises a sound adjusting element; the front housing is provided with a sound outlet hole and mode posts, and the sound adjusting element is provided with a sound adjusting hole corresponding to the sound outlet hole and a mode adjustment groove corresponding to the mode posts; when the sound adjusting element rotates, the mode adjustment groove may be limited by different mode posts, thus adjusting the volume of the front acoustic cavity and the area of a sound hole for the front acoustic cavity. Use of the above-described invention enables the middle and high frequency responses of the earphone to be adjusted and enables a single earphone to provide different sound characteristics.