Engine Noise Cancellation Using Speed-Based Compensation Parameters
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Solution Overview
Problem
Current vehicle denoising technologies fail to achieve ideal noise reduction, especially under high dynamics due to the rapid changes in engine noise conditions, leading to inefficiencies in adapting the cancellation signal.
Innovation Solution
A denoising method that pre-constructs a compensation parameter set for reference signals, filter coefficients, speaker signals, and microphone signals to efficiently determine optimal parameters for generating cancellation signals, adapting to rapidly changing engine speeds and improving noise reduction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional active denoising technology is used, then engine idle noise and acceleration noise can be reduced, but denoising effect deteriorates under high dynamics conditions
Solution Approach 1:
The patent implements dynamic adaptation by determining compensation parameters based on real-time engine speed feedback. The system adjusts filter coefficients and reference signals dynamically according to changing engine operating conditions, enabling effective noise cancellation across both low-speed idle and high-speed acceleration scenarios.
Solution Approach 2:
The patent changes key parameters including filter coefficients, reference signal amplitudes, and compensation factors based on engine speed. By modifying these parameters dynamically, the system maintains optimal denoising performance across varying dynamic conditions without requiring complete system redesign.
2Measurement precision
If real-time parameter adjustment is performed, then denoising accuracy improves, but computational time and processing delay increase
Solution Approach 1:
The patent pre-calculates and stores compensation parameters for different engine speed ranges before actual noise cancellation is needed. During real-time operation, the system only needs to retrieve pre-computed parameters based on current engine speed, significantly reducing computational delay while maintaining high accuracy.
Solution Approach 2:
The patent divides the engine speed range into multiple segments or zones, with distinct compensation parameters optimized for each segment. This segmentation allows the system to use simple lookup tables rather than complex real-time calculations, reducing processing time while preserving denoising accuracy across all operating conditions.
Data Source
AI summary
A denoising method, an electronic device and a storage medium are provided. The denoising method includes: determining an optimal compensation parameter from a preset compensation parameter set according to a current engine speed; and generating a cancellation signal according to the determined compensation parameter. The compensation parameter includes a parameter configured to compensate for at least one of following information: a reference signal, a filter coefficient, a speaker signal, or a microphone signal. The cancellation signal is configured to cancel current engine noise. At least it is beneficial for improving the denoising effect.