Physical Properties of Local Wave Field Synthesis using Circular Loudspeaker Arrays
Invited paper
University of Rostock
Monday 1 june, 2015, 11:20 - 11:40
0.3 Copenhagen (49)
Abstract:
The reproduction accuracy of sound field synthesis techniques, like e.g. Wave Field Synthesis (WFS) or near field compensated Higher-Order Ambisonics, is
limited due to practical aspects. For the audible frequency range the desired
sound field can not be synthesized aliasing-free over an extended listening
area, which is surrounded by a discrete ensemble of individually driven
loudspeakers. However, it is suitable for certain applications to increase
reproduction accuracy inside a smaller (local) listening region while stronger
artifacts outside are permitted. A local Wave Field Synthesis method utilizes
focused sources as a distribution of virtual loudspeakers which are placed more
densely around the local listening area. These virtual loudspeakers are then
driven by WFS techniques. This paper establishes an analytical framework to
analyze the physical properties of this approach for circular loudspeaker arrays.