Non-Smooth Secondary Source Distributions in Wave Field Synthesis

S Spors, F Schultz, H Wierstorf, "Non-Smooth Secondary Source Distributions in Wave Field Synthesis," in Fortschritte der Akustik - DAGA 2015, p. 1591-1594 (2015). [ paper ]

Bibtex

@inproceedings{Spors2015,
    title     = {Non-Smooth Secondary Source Distributions in Wave Field
                 Synthesis},
    author    = {Spors, Sascha and Schultz, Frank and Wierstorf, Hagen},
    booktitle = {Fortschritte der Akustik - DAGA 2015},
    publisher = {DEGA e.V.},
    address   = {Nuremberg, Germany},
    pages     = {1591--1594},
    month     = {March},
    year      = {2015}
}

Abstract

Wave Field Synthesis (WFS) is a well-established sound field synthesis technique that uses a dense distribution of loudspeakers (aka secondary sources) arranged around an extended listening area. The physical foundations of WFS assume a smooth secondary source distribution. Practical systems are often of rectangular shape, which constitutes a non-smooth secondary source distribution. The resulting effects on the synthesized sound field are investigated in this paper. The fundamentals of sound field synthesis are briefly reviewed and extended for non-smooth secondary source distributions. It is shown that edges can result in considerable amplitude and spectral deviations. The extended foundations serve as a basis for potential countermeasures. A modification of the loudspeaker driving signal is proposed to compensate for the edge effects. It effectiveness is evaluated for practical systems.