High Quality Content by WIKIPEDIA articles! Sound localization is a listener's ability to identify the location or origin of a detected sound in distance and direction or the methods in acoustical engineering to simulate the placement of an auditory cue in a virtual 3D space. There are two general methods for sound localization, binaural cues and monaural cues. Binaural localization relies on the comparison of auditory input from two separate detectors. Therefore, most auditory systems feature two ears, one on each side of the head. The primary biological binaural cue is the split-second delay between the time when sound from a single source reaches the near ear and when it reaches the far ear. This is technically referred to as the "interaural time difference" (ITD).