Vehicle Noise Control via External Server Extraction
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Solution Overview
Problem
Existing noise control technologies for vehicles face limitations in effectively canceling noise due to difficulties in generating sound waves with opposite phases for multiple noise forms and delayed detection analysis, leading to incomplete noise cancellation and increased costs.
Innovation Solution
A noise control apparatus that analyzes noise causes and uses an external network service to provide cancellation sound sources based on vehicle information such as GPS location, speed, and environmental conditions, including road characteristics and weather, to selectively cancel noise through a transmitter, receiver, and mixer system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If active noise control technique is used to cancel noise by generating sound waves with opposite phase, then noise cancellation effect is improved, but it becomes difficult to handle multiple forms of noise and system complexity increases
Solution Approach 1:
The patent extracts the noise analysis and cancellation sound generation functions from the vehicle-mounted system and relocates them to an external server. The vehicle terminal only performs noise detection and receives cancellation sounds, significantly reducing on-vehicle system complexity while maintaining effective noise cancellation across multiple noise forms through the external server's processing capabilities
Solution Approach 2:
The patent introduces an external server as an intermediary between noise detection and cancellation sound generation. This mediator handles the complex analysis of multiple noise forms and generates appropriate cancellation sounds, allowing the vehicle system to achieve effective noise cancellation without directly implementing complex noise control algorithms
2Object-affected harmful factors
If active noise control technique is used to detect and analyze noise and generate cancellation sound waves, then noise cancellation is achieved, but delay occurs in detection and analysis process
Solution Approach 1:
The patent implements preliminary action by having the external server pre-analyze noise characteristics and pre-generate cancellation sound waves based on predicted noise patterns. The system sends detection results to the server, which returns pre-prepared cancellation sounds, reducing the time delay between noise detection and cancellation sound delivery
3Object-affected harmful factors
If comprehensive noise cancellation system is implemented to remove entire noise, then noise removal effectiveness is improved, but costs increase significantly
Solution Approach 1:
The patent extracts the computationally intensive noise analysis and cancellation sound generation tasks from the vehicle system and places them on an external server. This allows comprehensive noise cancellation functionality to be achieved without investing in expensive on-vehicle hardware and processing capabilities, reducing overall system cost while maintaining effectiveness
Solution Approach 2:
The patent uses the external server as a virtual copy of the noise control processing system. Instead of duplicating expensive noise control infrastructure in each vehicle, the system accesses the server's processing capabilities remotely, achieving comprehensive noise cancellation at a fraction of the cost
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
This approach enhances noise cancellation efficiency by minimizing vehicle-mounted components, reducing costs, and improving economic efficiency by using external environmental information for precise noise reduction.
Implementation Method 1
The active noise control technique superposes a sound wave having the same magnitude as noise and a phase (−90°) opposite the noise on the noise such that the noise and sound wave cancel each other out, thereby generating a sound shadow area. That is, the active noise control technique uses superposition and destructive interference, which are physical properties of waves.
Implementation Method 2
The active noise control technique superposes a sound wave having the same magnitude as noise and a phase (−90°) opposite the noise on the noise such that the noise and sound wave cancel each other out
Data Source
AI summary
A noise control apparatus for vehicles includes a noise extractor for removing an output sound from an indoor sound to extract a noise, a transmitter for transmitting the noise and vehicle information, a receiver for receiving a cancellation sound corresponding to the noise and the vehicle information and a mixer for simultaneously outputting the cancellation sound and the output sound.