Speaker Resonance Space Detection Using Multi-Frequency Impedance
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Solution Overview
Problem
The resonance space of a speaker affects sound output characteristics, leading to variations in sound quality, and existing technologies lack effective methods to adjust audio signal processing parameters to compensate for these changes.
Innovation Solution
An electronic device transmits pilot signals at different frequencies to identify impedance changes in the speaker's space regions, allowing it to detect changes in the resonance space and adjust audio signal processing parameters accordingly to improve sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker operates in a fixed resonance space, then the sound output characteristics remain stable, but the sound quality cannot be optimized when the resonance space changes
Solution Approach 1:
The patent implements dynamic adjustment of audio signal processing parameters based on detected resonance space changes. The system continuously monitors impedance variations at different frequencies and adapts gain parameters in real-time, transforming the static audio processing into a dynamic system that responds to environmental changes, thereby maintaining sound quality optimization capability across varying resonance conditions
Solution Approach 2:
The patent employs feedback mechanisms by measuring impedance changes of the speaker at different frequencies and using this information to adjust audio signal processing parameters. The system creates a closed-loop control where the output (sound) is monitored through impedance measurement, and the input (audio signal parameters) is adjusted based on this feedback, enabling adaptive optimization of sound quality
2Device complexity
If audio signal processing parameters are fixed, then the processing method is simple, but the sound quality cannot be improved when resonance space varies
Solution Approach 1:
The patent changes audio signal processing parameters (specifically gain parameters) based on detected impedance variations. The system adjusts frequency-dependent gain parameters dynamically, transforming the audio signal characteristics according to resonance space conditions, thereby improving sound quality without requiring complex hardware modifications
Solution Approach 2:
The patent performs preliminary detection of impedance characteristics at different frequencies before adjusting audio signal parameters. By pre-measuring the resonance space characteristics through impedance analysis, the system prepares the necessary parameter adjustments in advance, enabling proactive optimization of sound quality rather than reactive correction
3Difficulty of detecting and measuring
If impedance measurement is performed at a single frequency, then the measurement process is simple, but the resonance space change detection is inaccurate
Solution Approach 1:
The patent segments the impedance measurement process into multiple frequency points. Instead of measuring impedance at a single frequency, the system performs measurements at multiple distinct frequencies (including but not limited to 20Hz, 100Hz, 1kHz, and 10kHz), dividing the broad frequency spectrum into discrete measurement points to capture comprehensive resonance space characteristics
Solution Approach 2:
The patent adds the frequency dimension to the impedance measurement process. By measuring impedance across multiple frequencies rather than at a single point, the system transforms a one-point measurement into a multi-dimensional characterization of the resonance space, enabling more accurate detection of space changes through frequency-dependent impedance variation analysis
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 method enables dynamic adjustment of audio signal gain based on impedance changes, optimizing sound quality by enhancing or reducing gain in specific frequency ranges to compensate for variations in the speaker's resonance space.
Implementation Method 1
Sound output through a speaker may resonate differently according to a resonance space of the speaker
Implementation Method 2
identify a first impedance of the speaker while the first pilot signal is transmitted through the speaker
Data Source
AI summary
An electronic device may comprise: at least one processor, comprising processing circuitry, and a speaker. At least one processor, individually and/or collectively, may be configured to cause the electronic device to: transmit a first pilot signal via the speaker using a first frequency; identify a first impedance of the speaker while the first pilot signal is being transmitted via the speaker; transmit a second pilot signal via the speaker using a second frequency different from the first frequency; identify a second impedance of the speaker while the second pilot signal is being transmitted via the speaker; detect a change in a space state of the speaker, based on the first impedance and the second impedance; identify at least one audio signal processing parameter based on the change in the space state of the speaker; and transmit an audio signal via the speaker based on the at least one audio signal processing parameter.