Abstract
A parametric audio system having increased bandwidth for generating airborne audio signals with reduced distortion. The parametric audio system includes a modulator (112) for modulating an ultrasonic carrier signal with a processed audio signal, a driver amplifier (118) for amplifying the modulated carrier signal, and an array of acoustic transducers (122) for projecting the modulated and amplified carrier signal through the air along a selected projection path to regenerate the audio signal. Each of the acoustic transducers in the array (122) is a membrane-type transducer (Fig. 2a and 2b). Further, the acoustic transducer array (122) is a phased array capable of electronically steering, focusing, or shaping one or more audio beams.
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