Dynamic parameters measurement of virtual auditory environment realtime rendering system

Dynamic information can greatly improve the realism of a virtual auditory display. System latency and update rate are two key dynamic parameters of a virtual auditory environment real time rendering system. A simple dynamic parameters measurement method is presented in this paper. Update rate measurement is implemented by measuring the interval between two consecutive sound scenes using visual C++ high accuracy timer function. An apparatus equipped with an optical switch and organic glass batten is designed to measure system latency. The output signals of both optical switch and real time rendering system are record by a computer´s recording software, and the interval between them is the system latency. The method described in this paper was used to measure dynamic parameters of our virtual auditory environment real time rendering system, and the results show that the method is feasible.