Miniature Surround-Sound Loudspeaker
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United States of America Patent
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Issued Date -
Jul 3, 2008
app pub date -
Jul 12, 2005
filing date -
Jul 13, 2004
priority date (Note) -
Abandoned
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Abstract
A portable sound system for use in portable devices such as laptops or mobile phones is described using the principles of parametric sound generation to create a virtual headphone-like system using focusable and steerage beams of ultrasonic sound emitted from a portage phased array or similar source of ultrasonic sound beams, focused at the vicinity of the left and right ear of the user. The system being also capable of producing audible surround sound and adapted to compensate for head motion through use of an optical based tracking system.
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