Edited By Albrecht Schneider and Arne von Ruschkowski
Tim Ziemer: Psychoacoustic Effects in Wave Field Synthesis Applications
153 Tim Ziemer Psychoacoustic Effects in Wave Field Synthesis Applications Abstract The present article compares ideas and methods of conventional audio techniques with wave field synthesis. Considering application areas and resulting needs of the listeners, psychoacoustic deliberations are derived to improve wave field synthesis, especially for musical performances with a small number of loudspeakers. A listening test shows the potential of combining wave field synthesis with systematically involved psychoacoustic deliberations. Introduction Wave field synthesis (WFS) is an audio reproducing technique which aims to physically recreate a natural wave field in a wide listening area. So far WFS is still in a state of research and development, not many WFS systems are available on the open market1. Wave field synthesis systems have numerous potential application areas2: – Laboratories for matters of research and development – Cinema/Theatre – Clubs/Concert halls – Conference Rooms/Lecture halls – Car – Virtual reality environments/Planetaria – Home cinema/music installation To date most of these areas are served by conventional audio systems such as stereo or 5.1 surround. Functional principle of conventional audio systems Conventional audio systems like stereo and 5.1 surround are usually based on either amplitude panning or time based panning between a pair of loudspeakers. Sometimes a combination of both panning techniques is used. As a result a virtual source (“phantom source”) can be placed on the connection line between the two loudspeakers (the “loud- speaker base”). The wave field created by this technique is different from a natural wave field which would emerge from a real source at that position. But...
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