FIG. 1.

Test setup for the localization tasks. Loudspeakers were numbered 1–12 with 30-degree spacing on the horizontal plane at the level of the listeners' ears. A circular loudspeaker array on the horizontal plane was used. As a result, the shorter angular path from the reported location to the actual location was used in error calculation. For instance, the angle between loudspeaker #12 and #1 was calculated as 30° (not 330°) since these two loudspeakers are separated by just one loudspeaker position.