Spatio-temporal unfolding of sound sequences

Distributing short sequences of sounds in space as well as in time is important for many applications, including the signaling of hot spots. In a first experiment, we show that the accuracy in the localization of one such spot is not improved by the apparent motion induced by spatial sequencing. In a second experiment, we show that increasing the number of emission points does improve the smooth- ness of spatio-temporal trajectories, even for those rapidly- repeating pulses that may induce an auditory-saltation illusion. Other indications for auditory-display designers can also be drawn from the experiments.