The purpose of
this project was to design a system that would actively direct
audio in desired directions and locations. Although there already
exist proven methods of achieving this goal, including ultrasound
modulation and sound direction by parabolic dishes, a digital signal
processing (DSP) and antenna theory approach was developed for
this system.
Although the project did not succeed, there are several
issues to be gained. The simulation software, after extensive
analysis appears
to be functioning correctly. This was verified by several individuals,
and the test patterns run on the software match the known data.
Unfortunately, the software needs to predict reflections from hard
surfaces in order
to be more useful for most indoor situations.
Read the complete report - pdf document (file
download - 52k)
click on the thumbnail below for a larger view (JPG: 640 x 480)
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diagram explaining the concept behind Audio Spotlight
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