Noise

The main purpose of this book is to provide an overview of the recent studies in this field and the applications in different research studies. The author provide a series of practical applications of their recent studies aimed at the reduction of noise in different environments. This book is a combination of theory and practice based on the latest research. The studies in this book range from evaluation methods for the perception of noise and outline forecast criteria that can be integrated with applications for acoustic mapping as well as the use of innovative techniques and materials for its abatement.

This book aims to address different aspects of noise pollution and provide guidelines, noise policies, and laws regarding environmental noise and its challenges. The book draws attention to these policies and laws, which are often neglected and not implemented. This book aims to raise awareness about noise pollution, while presenting information and knowledge about current laws and guidelines. It offers innovative solutions to noise problems and specific case scenarios of noise pollution.

This book discusses unified noise models of the broadest set of electronic components including, resistors, diodes, all types of transistors, and most types of opto-electronic devices. The noise, however, is a phenomenon which is inherent to any technology. It is omnipresent. It is obstructing every application and in many cases special actions must be undertaken to recognize the main function’s signal in the mistiness of the noise. The number of types of noise sources in electronics is almost unlimited. The book offers unique comprehensive approach to noise analysis in electronic circuits based on modified nodal analysis and the superposition theorem. It also encompasses a broadest set of low noise amplifier design procedures covering BJT, MOSET, MESFET, and HEMT technologies.

This book describes advances in the field of noise control. Chapters present different situations and case studies to better elucidate noise control approaches and applications, including noise mapping and outdoor barriers.

The articles in this volume present the state-of-the-art in noise prediction, modeling and measurement. The articles are partially based on class notes provided during the course `Noise sources in turbulent shear flows', given at CISM on April 2011. The first part contains general concepts of aero acoustics, including vortex sound theory and acoustic analogies, in the second part particular emphasis is put into arguments of interest for engineers and relevant for aircraft design: jet noise, airfoil broadband noise, boundary layer noise (including interior noise and its control) and the concept of noise sources, their theoretical modeling and identification in turbulent lows. All these arguments are treated extensively with the inclusion of many practical examples and references to engineering applications.

The first edition of Stochastic Partial Differential Equations: A Modeling, White Noise Functional Approach, gave a comprehensive introduction to SPDEs driven by space-time Brownian motion noise. In this, the second edition, the authors extend the theory to include SPDEs driven by space-time Lévy process noise, and introduce new applications of the field.

​Caused by downsizing of combustion engines, the torque fluctuation at the crankshaft induces torsional vibrations in the powertrain. Manual transmissions and dual clutch transmissions are particularly sensitive to gear-rattle noise. Gear-rattle noise arises from oscillations of loose parts with clearance, e.g. idler gears, synchronizer rings and gearshift sleeves. The aim of this research is the formulation of a gear oil for the application in a manual transmission to minimize gear rattling noise. Acoustic measurements on a gear-rattle noise test bench verify the noise reduction of the developed gear oils with commonly used low oil viscosity.