Virtual Reality Audio
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We are working with researchers in the NCSA Integrated Systems Laboratory to
develop a virtual reality audio display for the ALICE
virtual reality environment. Users of this environment wear a
headset, so that the system can easily know the position of both ears
precisely at all times. In current implementations, uses wear
headphones, and audio is played to the headphones after appropriate
HRIR convolution. Ah, but audio played through headphones sounds like
it is inside the head. In order to move the audio outside the head,
we want to use 8-16 speakers (mounted around the room) to create the
desired acoustic pressure at both ear canals. Problems to be solved:
- Measuring the room impulse response at
selected locations.
- Use measured responses to calibrate an image source model of the
speaker-to-ear impulse response.
- Invert the room response.