[Surfside] Audio Spotlight

[Paul Makepeace]

http://sound.media.mit.edu/~pompei/spotlight/

``The Audio SpotlightTM, invented and developed at the MIT Media Lab, is
a device which uses subtle nonlinear properties of the air to create an
extremely narrow Sound BeamTM.  This beam of sound behaves just like a
beam of light - 'shining' it at a specific listener allows only that
person to hear it, and projecting it against a surface creates an
acoustic 'image' at the point of reflection.  It is the first device
that provides total control over both the locationand distribution of
high quality sound, something impossible to achieve with traditional
loudspeakers.''