Download or read book An Introduction to Virtual Sound Barriers written by Xiaojun Qiu and published by CRC Press. This book was released on 2019-07-09 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: A virtual sound barrier is an active noise control system that uses arrays of loudspeakers and microphones to create a useful size of quiet zone and can be used to reduce sound propagation, radiation, or transmission from noise sources or to reduce noise level around people in a noisy environment. This book introduces the history, principle, and design methods of virtual sound barriers first, and then describes recent progress in research on the systems. Two virtual sound barrier systems, i.e., planar virtual sound barrier system and three-dimensional virtual sound barrier system, are discussed including applications, limitations and future direction discussions.