Earphone Sound Field Tuning Through Left-Right Gain Compensation
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Solution Overview
Problem
Current methods for adjusting the sound field of earphones are inaccurate, failing to provide an optimal listening experience due to differences in user habits and hardware interactions between earphones and portable audio devices.
Innovation Solution
A method and apparatus that acquire loudness data differences between the left and right earplugs of an earphone, determine the current sound field parameter, and adjust the gain parameters of the terminal's channels to match a pre-set sound field parameter, ensuring an optimal sound field is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If audio signal processing is performed through hardware circuit of portable audio playing device, then audio signal can be processed, but sound field accuracy deteriorates due to hardware influence
Solution Approach 1:
The patent introduces a sound field parameter as an intermediary variable that mediates between the hardware circuit processing and the actual sound field effect. By measuring the sound field parameter and using it to adjust audio signal processing, the system compensates for hardware-induced deviations without requiring direct modification of the hardware circuit, thus maintaining processing capability while improving sound field accuracy.
2Device complexity
If earphone and portable audio playing device are designed under certain assumed state, then device complexity is reduced, but sound field adaptability deteriorates for different user habits
Solution Approach 1:
The patent transforms the static design assumption into a dynamic adaptation mechanism. Instead of fixing the sound field parameters during design, the system continuously measures the actual sound field parameter and dynamically adjusts the audio signal processing in real-time. This allows the system to adapt to different user habits, earphone models, and listening environments while maintaining simple device design.
Solution Approach 2:
The patent implements a feedback loop where the sound field parameter is measured, compared against expected values, and used to adjust the audio signal processing. This closed-loop feedback mechanism enables the system to automatically adapt to different conditions without requiring complex pre-programming for every possible scenario, thus improving adaptability while keeping device complexity manageable.
3Ease of operation
If virtual sound field space positioning is used, then sound field adjustment is attempted, but accuracy deteriorates due to wearing gesture influence
Solution Approach 1:
The patent enables the system to self-correct for wearing gesture variations by continuously measuring the sound field parameter and automatically adjusting the audio signal processing. Instead of requiring users to manually adjust settings or wear the earphone in a specific position, the system adapts to the actual wearing condition through self-service measurement and adjustment, thereby maintaining accuracy despite variations in wearing gestures.
Data Source
AI summary
Provided are a method and apparatus for adjusting a sound field of an earphone, a terminal, and an earphone. The method includes acquiring a loudness data difference between first and second earplugs of an earphone connected to a terminal; determining a current sound field parameter of the earphone according to the loudness data difference; judging whether the current sound field parameter is substantially the same as a pre-set sound field parameter by comparison; and when the current sound field parameter is not the same as the pre-set sound field parameter, adjusting gain parameters of first and second channels of the terminal according to the current sound field parameter and the pre-set sound field parameter, so that the current sound field parameter of the earphone reaches the pre-set sound field parameter.