Ultrasonic parametric multiway speaker system

摘要

A frequency splitter separates an audio signal (50) into several paths viz. deep frequencies (51), medium frequencies (52) and high frequencies (53). Signals from each of these paths are fed to corresponding FM modulators (61-63) or to amplifier stages (71-73) and to an allocated modulator. Different modulators with different modulator power characteristics (712,722,732) are used for the individual paths. An Independent claim is also included for a device for triggering/driving a parametric loudspeaker system.