Adaptive Vehicle Noise Cancellation System
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Solution Overview
Problem
Existing noise cancellation systems in vehicles are ineffective across a wide range of operating conditions and fail to adapt to varying environmental factors, leading to inconsistent noise reduction and potential distraction for occupants.
Innovation Solution
A noise cancellation system that selects and adjusts configuration parameters based on real-time data from various vehicle operating conditions, including surface roughness, driving mode, speed, and ambient temperature, using electronic processors and noise sensing means to generate tailored noise cancellation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active noise cancellation is implemented using fixed configuration parameters, then noise reduction can be achieved in specific conditions, but the system becomes ineffective across a wide range of operating conditions
Solution Approach 1:
The patent implements dynamic adaptation by continuously monitoring vehicle operating conditions (speed, engine RPM, gear position) and automatically adjusting noise cancellation configuration parameters in real-time. The system transitions from static fixed parameters to dynamic adaptive parameters that respond to changing vehicle states, ensuring effective noise cancellation across diverse operating conditions
Solution Approach 2:
The system changes configuration parameters (such as filter coefficients, gain values, and frequency targets) based on detected operating conditions. By dynamically modifying these parameters according to vehicle speed, engine load, and gear position, the system maintains optimal noise cancellation performance across varying operational scenarios
2Object-affected harmful factors
If mechanical measures are used to reduce noise, then noise reduction is achieved, but the system becomes bulky and heavy
Solution Approach 1:
The patent replaces mechanical noise isolation measures (such as heavy soundproofing materials, bulkier dampers, and physical barriers) with an active noise cancellation system that uses electronic sensors, processors, and speakers to generate anti-phase sound waves. This substitution dramatically reduces system weight while achieving effective noise reduction
3Object-affected harmful factors
If active noise cancellation is implemented, then noise reduction is achieved, but the system may distract occupants due to inconsistent performance
Solution Approach 1:
The system incorporates feedback mechanisms that continuously monitor both the operating conditions and the actual noise levels within the vehicle cabin. This feedback loop enables the system to adjust configuration parameters in real-time, maintaining consistent and natural-sounding noise cancellation performance that does not distract occupants
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 system effectively reduces noise in vehicles by adapting to different operating conditions, improving occupant comfort and safety by providing a quieter environment that is responsive to changing circumstances.
Implementation Method 1
Active noise cancellation involves the generation of a sound wave to cancel a noise sound wave thus making the environment quieter for a listener
Data Source
AI summary
Embodiments of the present invention provide a noise cancellation system, comprising noise cancellation parameter selection means for receiving data indicative of one or more operating conditions associated with a vehicle and selecting one or more noise cancellation configuration parameters based thereon, and noise cancellation means for receiving one or more noise signals, determining an in-vehicle noise cancellation signal based on the one or more noise signals according to the one or more configuration parameters and outputting the in-vehicle noise cancellation signal for reducing noise in the vehicle.