Audio Playing System Personalized Channel Compensation
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Solution Overview
Problem
Audio playing systems, such as earphones and loudspeakers, often have unbalanced channel characteristics due to manufacturing limitations and individual differences in human ear sensitivity, leading to suboptimal audio experiences.
Innovation Solution
An audio playing system with a controller and equalizers that adjust modulation parameters based on user-specific parameters obtained through a test mode, ensuring balanced audio output by compensating for channel and ear differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manufacturing processes are simplified to reduce cost, then ease of manufacture is improved, but channel characteristic balance deteriorates
Solution Approach 1:
The patent applies parameter changes by measuring the actual frequency response characteristics of each earphone channel and adjusting equalizer parameters to compensate for deviations. Instead of relying on precise manufacturing to achieve balance, the system changes the electrical parameters (gain, frequency response) through software-based equalization to achieve balanced audio output.
Solution Approach 2:
The patent implements feedback by measuring the actual sound pressure level and frequency response of each channel using a reference ear, then using this measurement feedback to automatically adjust the equalizer parameters. This closed-loop feedback mechanism compensates for manufacturing variations without requiring complex manufacturing processes.
2Adaptability or versatility
If equalization adjustments are made to compensate for ear sensitivity differences, then audio experience is improved, but device complexity increases
Solution Approach 1:
The patent introduces a reference ear as an intermediary device that measures the frequency response characteristics. This intermediary serves as a bridge between the earphone and the user's actual ear, enabling the system to characterize ear sensitivity differences and compensate for them through equalization without requiring complex direct measurement of human ear physiology.
Solution Approach 2:
The system performs self-service by automatically measuring channel characteristics using a reference ear and autonomously adjusting equalizer parameters without requiring manual calibration by the user. The measurement and compensation process is automated, reducing the operational complexity for end users.
3Manufacturing precision
If channel characteristics are made identical through manufacturing, then manufacturing precision is improved, but adaptability to individual user ears deteriorates
Solution Approach 1:
The patent applies local quality by providing individualized equalization parameters for each user's ear characteristics rather than using a uniform setting for all users. The system measures and compensates for specific local deviations in each user's ear sensitivity across different frequency bands, enabling personalized audio optimization while maintaining manufacturing efficiency.
Data Source
AI summary
An audio playing system has a first channel output device, a first audio modulator and a controller. The first audio modulator is electrically coupled to the first channel output device and having a set of first modulation parameters, the first audio modulator configured to selectively modulate a first channel audio signal with the set of first modulation parameters and output the modulated first channel audio signal to the first channel output device. The controller is electrically coupled to the first channel output device and the first audio modulator, wherein in a test mode, the controller is configured to send a set of test audio signals to the first channel output device, to generate a set of first user parameters based on a plurality of pieces of first confirmation signal, and to adjust the set of first modulation parameters based on the set of first user parameters.