Audio Circuit Dynamic Speaker State Correction
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Solution Overview
Problem
Conventional audio circuit systems struggle to maintain uniform sound quality across multiple channels due to dynamic factors such as speaker vibration, temperature variations, and aging degradation, which are not effectively addressed by existing correction processing methods.
Innovation Solution
An audio circuit with a signal processing unit and amplifier that incorporates sensors to monitor and dynamically correct audio signals based on speaker state, including vibration, magnetic field, and temperature, ensuring adaptive reproduction characteristics and improved sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional correction processing is used to correct audio signals, then static characteristics such as speaker installation positions can be corrected, but dynamic factors such as vibration, temperature variation, and aging degradation cannot be corrected
Solution Approach 1:
The patent transitions from static correction processing to dynamic correction processing by continuously monitoring speaker state (vibration, temperature, impedance) in real-time and adjusting audio signals accordingly. This enables the system to adapt to changing environmental conditions and speaker degradation over time, resolving the contradiction between correction capability and sound quality consistency.
Solution Approach 2:
The patent implements a feedback mechanism where sensors continuously monitor speaker state parameters (vibration acceleration, temperature, impedance) and feed this information back to the signal processing unit. The signal processing unit then adjusts the audio signals based on this feedback, enabling continuous correction of dynamic factors and maintaining reliable sound quality.
2Reliability
If multiple sensors are added to monitor speaker state dynamically, then sound quality can be improved, but device complexity increases
Solution Approach 1:
The patent employs a single sensor unit that measures multiple speaker state parameters simultaneously (vibration acceleration, temperature, and impedance). This multi-functional approach reduces the number of separate sensors needed, thereby improving sound quality through comprehensive monitoring while minimizing the increase in device complexity.
Solution Approach 2:
The patent combines multiple measurement functions (acceleration sensing, temperature sensing, and impedance measurement) into a single integrated sensor unit and processing pipeline. This merging of functions achieves comprehensive speaker state monitoring for improved sound quality while reducing the overall complexity of the circuit structure compared to using separate dedicated sensors for each parameter.
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 solution effectively cancels out disturbance vibrations, suppresses differences in magnetic fields and temperature variations, and corrects impedance, resulting in uniform output characteristics across multiple speakers, thereby enhancing sound quality and maintaining consistent performance over time.
Implementation Method 1
at least one sensor may be a vibration sensor structured to detect the vibration of the speaker
Implementation Method 2
the signal processing unit may superimpose, on the audio signal, a signal having opposite phase to the vibration
Implementation Method 3
at least one sensor may be a magnetic sensor structured to detect the magnetic field generated by the speaker
Implementation Method 4
at least one sensor may be a temperature sensor structured to detect the temperature of the speaker
Implementation Method 5
the audio circuit may comprise a detection circuit structured to measure the current that flows through the speaker
Data Source
AI summary
An audio circuit drives a speaker. A DSP corrects an audio signal S1 according to the state of the speaker. An amplifier drives the speaker according to a corrected audio signal S3.