A system for real-time virtual auditory space
Scarpaci, Jacob W
White, John A
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The understanding of how people perceive spatially dynamic sound sources is limited, due in part to the difficulty of controlling dy- namic environmental interactions. Free field solutions require large rooms with bulky equipment for moving speakers. Virtual systems that account for head movement must balance adaptability with stability of timing characteristics (time lag and jitter). The system described here combines the flexibility and ease of use of a soft- ware system, with near-hardware stability of a real-time operating system. Hardware and software design choices are discussed and the system performance is evaluated. Preliminary psychophysics are run to validate the system and to illustrate the need to study system latencies smaller than previously considered relevant.