Understanding Active Noise Cancellation - Colin H. Hansen

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Understanding Active Noise Cancellation

Name: Understanding Active Noise Cancellation
Brand: ROUTLEDGE
Price: 401.5 AUD
Availability: BackOrder

By: Colin H. Hansen

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Hardcover | 28 June 2001 | Edition Number 1

At a Glance

Hardcover
176 Pages

Dimensions(cm)
23.4 x 15.6 x 1.27

Hardcover

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Understanding Active Noise Cancellation provides a concise introduction to the fundamentals and applications of active control of vibration and sound for the non-expert. It is also a useful quick reference for the specialist engineer. The book emphasises the practical applications of technology, and complex control algorithms and structures are only discussed to the extent that they aid understanding. Extensive recommendations for further reading in the subject are provided, but the text will stand alone for those seeking an overview of the key issues: fundamentals, control systems, transducers, applications and possible future directions. Key features: practical introduction to noise control for both engineers and non-experts, clearly written and well illustrated, author is highly respected in this field.

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A Little History
Introduction
Early History
Later History
The Future
Foundations of Active Control
Physical Mechanisms
Basic Structure of Active Noise Control Systems
Control System Optimisation
Influence of Control Source Output Power and Placement
Influence of Error Sensor Placement
Influence of Reference Signal Delay and Quality
The Electronic Control System
Introduction
Control Filter
Cancellation Path Transfer Function Estimation
Adaptation Algorithms
FXLMS Algorithm for Adapting the Weights of an FIR Filter
Multi-Channel and Filtered-U RLS Algorithms for IIR Filters
Genetic Algorithms
Killing Selection Instead of Survivor Selection
Weight String Instead of Binary Encoding
Mutation Probability and Amplitude
Rank-Based Selection (Killing and Breeding)
Uniform Crossover
Genetic Algorithm Parameter Adjustment
Performance Measurement
Putting it all Together
Important Practical Controller Implementation Issues
Microprocessor Selection
Converter Type and Group Delay Considerations
Digital Sampling Rate
Algorithm Considerations
Accuracy of Controller Output
Active Noise Control Sources
Acoustic Sources
Vibration Sources
Error Sensors
Microphones
Vibration Sensing and Control of Sound Radiation
Sound Intensity and Energy Density Control
Control Algorithms for Various Sensing Strategies
Shaped or Distriubtued Structural Sensors
Sound Intensity
Energy Density
Power or Intensity Squared
Applications of Active Noise Control
Some General Considerations
Application Examples
Sound Propagation in Ducts
Plan Wave Propagation
Higher Order Mode Propagation
Sound Radiation from Vibrating Structures
Physical Control Mechanisms
Control Actuators and Error Sensors
Active Headsets and Ear Muffs
Feedback Systems
Feedforward Systems
Transducer Considerations
Sound Transmission into Enclosed Spaces
Global Reduction of Low Frequency Tonal Noise in Propeller Aircraft
Reduction of Interior Noise in Diesel Engine-Driven, Mobile Mining Equipment
Local Reduction of Broadband Noise in Large Aircraft
Global Reduction of Low Frequency Road Noise in Cars
Active Vibration Isolation
Examples of Applications which are Impractical
Global Reduction of Broadband or High Frequency Tonal Noise in Large Aircraft
Global Reduction of Broadband or Transient Noise Transmitted into a Building Space
Reduction of Traffic or Aircraft Flyover Noise Transmitted into a Building
Global Reduction of Tonal or Periodic Noise in a Large Space such as a Factory which contains many Noise Sources
Global Reduction of Broadband Noise in a Large Factory
Reduction of Broadband Noise Outdoors
Reduction of Transient Noise Outdoors
Current and Future Directions
Commercial Control System Requirements
Controller Hardware
Controller Software
Acoustic System Software
Current Research Directions
Sound Sources
Error Sensors
Optimisation of Control Source and Error Sensor Locations
Control Filters and Algorithms
Coupled Systems
Hybrid Active/passive Silencers
Summary
References
Useful Websites for More Information
Table of Contents provided by Publisher. All Rights Reserved.

Understanding Active Noise Cancellation

At a Glance

Hardcover

Shipping

How to return your order

Defective items

You Can Find This Book In

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