Screen Sound Frequency Calibration for Consistent Audio Response
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Solution Overview
Problem
The frequency response curve of sound signals produced by screen sound production components in electronic devices fluctuates significantly due to manufacturing errors and variations in screen quality, leading to inconsistent user experiences.
Innovation Solution
A frequency response consistency calibration method that involves playing a test audio signal, analyzing the frequency response, and using an equalizer calibration module with sub-band filters to adjust the frequency response curve to match a standard, ensuring consistent audio playback quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If different processing methods are used for different frequency bands, then frequency-specific optimization is achieved, but processing complexity increases
Solution Approach 1:
The patent divides the frequency spectrum into multiple frequency bands (e.g., low, mid, high frequencies) and applies different processing methods to each band. This segmentation allows optimized processing for each frequency range while maintaining overall system manageability, resolving the contradiction between frequency-specific optimization and processing complexity.
Solution Approach 2:
The system dynamically adjusts processing parameters based on the input signal's frequency characteristics. By analyzing the spectral content and adapting processing strength per band, the system achieves frequency-specific optimization without requiring fixed complex processing for all signals, thus balancing accuracy and complexity.
2Measurement precision
If frequency response calibration is performed, then audio output accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs frequency response calibration in advance during device setup or manufacturing, storing the calibration results for later use. This preliminary action ensures accurate audio output during actual operation without requiring time-consuming real-time calibration, thus resolving the contradiction between accuracy and processing time.
Solution Approach 2:
The system uses the device's own speaker and microphone to perform self-calibration by playing test tones and analyzing the captured response. This self-service approach eliminates the need for external calibration equipment and reduces calibration time, achieving accurate frequency response adjustment efficiently.
3Measurement precision
If multiple microphones are used for frequency analysis, then measurement accuracy is improved, but device structure becomes more complex
Solution Approach 1:
The patent assigns different frequency bands to different microphones, with each microphone optimized for specific frequency ranges. This segmentation allows accurate frequency analysis across the entire spectrum while maintaining a manageable number of microphones, resolving the contradiction between measurement accuracy and device structural complexity.
Data Source
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AI summary
Embodiments of this application provide a frequency response consistency calibration method and an electronic device, to solve a problem that when a screen sound production component of an electronic device plays a sound signal, a frequency response curve of the sound signal greatly fluctuates. The frequency response consistency calibration method includes: An electronic device plays a test audio signal. The electronic device stores a calibration parameter. The calibration parameter is a running parameter of an equalizer calibration module. The calibration parameter is determined based on a frequency response of a first audio signal and a standard frequency response of the test audio signal. The first audio signal is obtained by a calibration device by acquiring the test audio signal played by the electronic device. The calibration parameter is used to adjust, through the equalizer calibration module when the electronic device plays a second audio signal, a frequency response of the second audio signal played by the electronic device.