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|Title:||Audio beam : a new type of loudspeaker design||Authors:||Gan, Woon Seng
Er, Meng Hwa
|Keywords:||DRNTU::Engineering::Electrical and electronic engineering::Home entertainment systems||Issue Date:||2003||Abstract:||Audio Beam is a revolutionary way of projecting audio signals in a highly directional manner to the listener. Instead of using conventional large loudspeaker arrays for projecting a narrow sound beam to the listener, this new technique creates the same narrow beam by amplitude-modulating the audio signal with a finite amplitude ultrasonic carrier wave and then transmitting the resultant signal from an array of ultrasonic transducers across the air to the listener. As a result, an audio signal is automatically produced by the self-demodulation effect of the amplitude-modulated sound wave in the air, without the aid of any hearing device. With this nonlinear interaction, we develop a new type of loudspeaker capable of controlling the direction of the transmitted audio signal.||URI:||http://hdl.handle.net/10356/2855||Rights:||Nanyang Technological University||Fulltext Permission:||restricted||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Research Reports (Staff & Graduate Students)|
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