Agricultural Vehicle Noise Attenuation via Context-Based Frequency Segmentation
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Solution Overview
Problem
Agricultural work vehicles face challenges in noise attenuation systems that fail to distinguish between important operational noises and background noises, leading to reduced awareness of critical sounds necessary for safe operation.
Innovation Solution
A method and system that determine the operating context of the work vehicle by evaluating parameters such as control commands and sensor signals, allowing for context-based control of noise attenuation, emphasizing important frequencies while suppressing unwanted noise through active and passive noise compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noise attenuation system suppresses all external noises to improve comfort, then noise insulation is improved, but operator awareness of critical operational sounds deteriorates
Solution Approach 1:
The noise attenuation system segments the noise spectrum into different frequency ranges and applies different processing to each. Critical frequency ranges containing operational sounds are preserved or emphasized, while other noise frequencies are attenuated. This selective frequency-based segmentation allows simultaneous noise reduction and operational awareness.
Solution Approach 2:
The system applies local quality by treating different frequency ranges differently within the same noise attenuation system. Specifically, certain frequency bands associated with critical operational sounds are maintained or enhanced locally, while other frequency bands are suppressed. This creates a differentiated noise treatment that preserves important sounds while reducing overall noise pollution.
2Device complexity
If noise attenuation system uses fixed attenuation strategy, then system complexity is reduced, but adaptability to different operating contexts deteriorates
Solution Approach 1:
The noise attenuation system implements dynamics by continuously adapting its attenuation strategy based on detected operating contexts. The system transitions from static fixed attenuation to dynamic context-dependent attenuation, where attenuation levels are adjusted in real-time according to the operational state of the work vehicle and surrounding environment.
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring operating parameters and using this information to adjust noise attenuation levels. The detection unit provides feedback about the operating context, which the control unit uses to modify the attenuation strategy, creating a closed-loop system that adapts to changing conditions.
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
Enhances the operator's perception of relevant noises by differentiating between useful and background noise, improving operational safety and awareness in various working contexts.
Implementation Method 1
which serve to cancel out sound by means of destructive interference
Implementation Method 2
This involves active noise compensation and/or active noise recording
Data Source
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AI summary
The present invention relates to a method for controlling a noise reduction system (60) for an agricultural work vehicle (1, 2, 30), with at least one working unit (10, 13, 23, 34, 44, 46, 47, 48) which is controlled by at least one control device (9, 43) of the work vehicle (1, 2, 30), and with a soundproofed cabin (4, 32), characterized by the steps: - determining operating parameters of the work vehicle (1, 2, 30); - deriving an operating context of the work vehicle (1, 2, 30) based on the operating parameters; and - Control of the noise reduction system (60) depending on the derived operating context, wherein, depending on the operating context, predetermined frequency ranges are transmitted from the noise reduction system (60) to an operator of the work vehicle (1, 2, 30) located in the cabin (4, 32).