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(A) dimensions of the infrared LED array and illustration of typical tracking setup: the Wii remote was placed about 1 meter above the head pointing down at the LED array mounted on top of the listener’s head. To ensure radial asymmetry, the two LEDs at the back of the array were placed closer to each other than to the one at the front. (B) Circuit diagram illustrating the components and connections used to build the infrared LED array.
