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Audio beam system is a revolutionary way of projecting audio signal in a highly directional manner to listener. This paper focuses on the power management of audio beam system. A specific loudspeaker, which is fabricated by polyvinylidene fluoride (PVDF), is proposed according to the theory of corrugated structure for PVDF film. Based on the test and analysis results, a unique digital amplifier, Class...
Audio Beam is a revolutionary way of projecting audio signal in a highly directional manner to the listener. A high efficiency class D power amplifier is presented to drive the piezoelectric load, polyvinylidene fluoride(PVDF) ultrasonic transducer of Audio Beam, between 20 kHz and 60 kHz. The class D amplifier is composed of power MOSFETS, type IRFU2407, in a full H-Bridge configuration driven by...
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