Vehicle Noise Cancellation Controller Adaptive Acoustic State
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Solution Overview
Problem
Conventional noise cancellation systems in vehicles are resource-intensive and require significant computational power, often leading to excessive power consumption when all systems are activated simultaneously, as they operate independently without efficient management.
Innovation Solution
A system comprising an adaptive noise classifier and a controller that determines a vehicle's acoustic state based on audio signals and functional attributes, allowing for the efficient control of noise cancellation systems, including engine, road, and active noise cancellation systems, by activating or deactivating them based on the dominant noise profiles and vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all noise cancellation systems are activated simultaneously, then noise cancellation effectiveness is improved, but power consumption and resource utilization increase significantly
Solution Approach 1:
The system dynamically adjusts the operational state of each noise cancellation system based on real-time acoustic state determination. The controller receives audio signals, determines the dominant noise type (engine, road, or wind noise), and selectively activates only the necessary noise cancellation systems, transforming the static all-or-nothing activation approach into a dynamic, condition-based activation strategy that reduces power consumption while maintaining effectiveness.
Solution Approach 2:
The system changes the operational parameter (activation state) of noise cancellation systems based on the determined acoustic state. When engine noise is dominant, the engine noise cancellation system is activated; when road noise is dominant, the road noise cancellation system is activated; and when wind noise is dominant, the wind noise cancellation system is activated. This parameter change approach ensures optimal power usage by activating only the required systems rather than all systems simultaneously.
2Reliability
If multiple noise cancellation systems operate independently, then each system can function optimally, but device complexity and resource utilization increase
Solution Approach 1:
The patent merges the control functions of multiple independent noise cancellation systems into a unified control architecture. The single controller receives audio signals from microphones, determines the overall acoustic state (engine noise, road noise, or wind noise), and coordinates the activation of relevant noise cancellation systems. This merging approach reduces management complexity while maintaining the optimal performance of each individual system by centralizing the decision-making process.
3Ease of operation
If noise cancellation systems are always active, then noise comfort is maintained, but computational power and resource usage are excessive
Solution Approach 1:
The system applies partial action by activating only the necessary subset of noise cancellation systems based on the dominant noise type, rather than keeping all systems active. When engine noise is detected, only the engine noise cancellation system operates; when road noise is detected, only the road noise cancellation system operates; and when wind noise is detected, only the wind noise cancellation system operates. This partial activation approach maintains noise comfort for the prevailing condition while significantly improving computational efficiency by avoiding unnecessary processing.
Data Source
AI summary
An adaptive noise classifier and a controller for controlling various noise cancellation systems of a vehicle are provided. The adaptive noise classifier determines a first acoustic state of the vehicle based on audio signals generated by various audio-capturing devices of the vehicle. The controller receives status data indicative of one or more functional attributes of the vehicle. Based on the status data and the first acoustic state, the controller determines a second acoustic state. The second acoustic state is an updated version of the first acoustic state. Based on the second acoustic state, the controller controls an operational state of each noise cancellation system of the vehicle.