Vehicle Sound Augmentation Transfer Function Calibration
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Solution Overview
Problem
Sound augmentation systems in vehicles face diminished effectiveness due to changes in audio characteristics over time and lack of optimization for individual vehicle characteristics, leading to suboptimal noise cancellation.
Innovation Solution
A vehicle system that includes a sound augmentation generator, health monitor, user interface, and transfer function calibration module, which determines performance levels, triggers updates, and drives calibration sequences to determine and update transfer functions based on feedback and user requests, ensuring accurate audio output and input monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If broadly defined transfer functions are used for a group of vehicles, then stability across build variations is achieved, but optimization for individual vehicle characteristics is lost
Solution Approach 1:
The patent segments the transfer function calibration process into two distinct components: a broadly defined transfer function that provides stability across build variations, and a vehicle-specific calibration process that optimizes for individual characteristics. This segmentation allows the system to maintain both group-level consistency and individual-level optimization without conflict.
2Measurement precision
If transfer function calibration is performed frequently, then accuracy of noise cancellation is improved, but system complexity and user intervention requirements increase
Solution Approach 1:
The patent implements a feedback mechanism where the sound augmentation system health monitor continuously evaluates current performance level and compares it against expected performance level. Transfer function update prompts are triggered only when the performance difference exceeds a threshold, enabling the system to maintain accuracy while minimizing unnecessary calibration operations and reducing overall system complexity.
3Measurement precision
If transfer function calibration is performed frequently, then accuracy of noise cancellation is improved, but user intervention time increases
Solution Approach 1:
The feedback mechanism monitors performance continuously and only prompts users for calibration when the difference between current and expected performance levels exceeds a predetermined threshold. This ensures calibration is performed only when necessary to maintain accuracy, minimizing user time investment while preserving noise cancellation effectiveness.
Solution Approach 2:
The system performs self-diagnosis and self-calibration capabilities, where the health monitor automatically detects when calibration is needed and guides the user through the process only when performance degradation is detected. This reduces unnecessary user intervention while maintaining system accuracy.
Data Source
AI summary
A vehicle system is provided that includes a sound augmentation system with a sound augmentation generator that produces an augmented audio output to drive at least one audio output based on a transfer function. The vehicle system also includes a sound augmentation system health monitor that determines a current performance level of the sound augmentation system based on at least one audio input and a feedback of the augmented audio output, and triggers a transfer function update prompt based on a difference between the current performance level and an expected performance level being at a threshold level. A user interface outputs the transfer function update prompt and receives a transfer function calibration request in response to the transfer function update prompt. A transfer function calibration module drives a calibration sequence on at least one audio output and monitors at least one audio input to determine an updated transfer function.