Improvement of 3-D Sound Systems by Vertical Loudspeaker Arrays
Recently we proposed a 3-D sound system using a horizontal arrangement of loudspeakers by combining the effect of HRTF and the amplitude panning method. In that system, loudspeakers are set at the height of subject's ear level and its sweet-spot is limited by the height of loudspeakers. When the listener's ear level is different from the loudspeakers, it will cause difficulty of sound localization or breakdown of sound localization. However, it is difficult to adjust properly both the height of loudspeakers and subject's ear level every time. In this paper we aimed to improve the robustness of the 3-D sound system using vertical loudspeaker arrays. As a result of experiments, we prove that the loudspeaker arrays can improve the robustness of the 3-D sound system.
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