Noise refers to the various forms of unwanted signals that are considered loud, unpleasant or disruptive. It can be intended or unintended. Both sound and noise are vibrations through a medium such as air or water. They are distinguished when the brain receives and perceives a sound. It can be measured on the basis of the sound wave's amplitude and frequency. A sound level meter is used to measure sound in the air. In engineering, noise refers to undesirable residual electronic noise signals that generate acoustic noise. This kind of noise is usually measured using A-weighting or ITU-R 468 weighting techniques. This book elucidates the concepts and innovative models around prospective developments with respect to analysis and mitigation of sound. Most of the topics introduced herein cover new techniques and the applications of this field in a multidisciplinary manner. This book will help new researchers by foregrounding their knowledge in this branch.