Sound Field Reproduction

Chapter 6 describes the methods to reproduce a desired sound field in space and time. It is explained how an inverse problem is defined and why the problem is often ill‐posed. The possible means to reproduce sound fields of interest are then introduced, with techniques to overcome issues related to ill‐posedness. The method needs to be changed depending on what one desires to reproduce. The well‐known wave field synthesis (WFS) and mode‐matching approaches are introduced. The methods used to solve the exterior and interior problems of the Kirchhoff‐Helmholtz integral equation are also described.