Computer controlled virtual humans are an increasingly important component of applications such as training, therapy, novel computer interfaces, and social research. Often virtual characters are projected onto screens that are blended into a physical setting. Stereo loudspeakers to the left and right of the screen are typically used for virtual human audio. Unfortunately, stereo pairs can produce an effect known as precedence, which causes users standing close to a particular loudspeaker to perceive a collapse of the stereo sound to that singular loudspeaker. This video highlights a study conducted at the MxR Lab where we sought to determine if this effect might degrade the presentation of a virtual character, or if this would be prevented by the ventriloquism effect and if users might express a preference for a sound source collocated with the virtual human’s mouth rather than a stereo pair.
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