Active Noise Control Module for Power Generation Intake
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Solution Overview
Problem
Industrial machinery systems, such as power stations, generate excessive noise that needs to be controlled, especially when placed in noise-restricted areas, and existing noise control technologies are inefficient in reducing noise across a wide frequency range without causing significant space or duct pressure-loss.
Innovation Solution
The implementation of Active Noise Control (ANC) module units within the air intake or exhaust systems of power generation units, comprising a microphone to detect noise, a control board to process sound signals using pre-determined transfer functions, and speakers or shakers to produce noise-canceling sound waves that cancel out the original noise, allowing for efficient noise reduction across a wide frequency range without relying on large passive noise attenuation systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If passive noise attenuation systems are used, then noise reduction is achieved, but the system occupies significant space and causes duct pressure-loss
Solution Approach 1:
The patent replaces passive mechanical noise attenuation systems with an active electronic noise control system. The system uses microphones to detect noise, a control board to process signals using transfer functions, and speakers or shakers to generate anti-phase sound waves that cancel the original noise. This substitution eliminates the need for large passive structures while maintaining noise reduction effectiveness across a wide frequency range.
2Object-affected harmful factors
If passive noise attenuation systems are used, then noise reduction is achieved, but duct pressure-loss increases
Solution Approach 1:
The patent replaces passive mechanical noise attenuation systems with an active electronic noise control system. The system uses microphones to detect noise, a control board to process signals using transfer functions, and speakers or shakers to generate anti-phase sound waves that cancel the original noise. This substitution eliminates the need for large passive structures while maintaining noise reduction effectiveness across a wide frequency range.
3Object-affected harmful factors
If existing noise control technologies are used, then some noise reduction is achieved, but effectiveness across wide frequency range is insufficient
Solution Approach 1:
The patent employs dynamic active noise control technology that adapts to different frequency ranges. The control board processes signals from microphones and adjusts the output to speakers or shakers in real-time, allowing the system to effectively reduce noise across a wide frequency range rather than being limited to specific frequencies as in passive systems.
Solution Approach 2:
The system changes parameters dynamically by using transfer functions that characterize the acoustic path between noise sources and sensors. The control board adjusts the anti-noise signals based on these transfer functions, enabling effective noise cancellation across varying frequencies and conditions without requiring physical system changes.
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 ANC module units effectively reduce noise levels by producing sound waves opposite in phase to the original noise, achieving efficient noise cancellation without significant space or duct pressure-loss, making the system quieter and more efficient than traditional passive noise abatement methods.
Implementation Method 1
a microphone configured to detect a sound generated by the power generation unit
Implementation Method 2
a first speaker configured to deliver a first noise-canceling sound to the air intake or exhaust
Implementation Method 3
producing sound waves opposite in phase to the original noise, achieving efficient noise cancellation
Data Source
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AI summary
A system includes an Active Noise Control (ANC) module unit configured to be installed within an air intake or exhaust of a power generation unit. The ANC module unit includes an ANC housing shaped to fit within the air intake or exhaust, an ANC core configured to be secured within the ANC housing, which includes a microphone configured to detect a sound generated by the power generation unit, a control board configured to control the noise-canceling sound based on the sound signal from the microphone and a set of pre-determined noise reduction transfer functions, and a first speaker configured to deliver a first noise-canceling sound to the air intake or exhaust.