Method for reproducing an audio signal with an ultrasonic loudspeaker

摘要

Method involves using ultrasonic generator, whereby audio signal to be reproduced is combined with carrier signal in ultrasonic frequency range by sideband amplitude modulation. There is arrangement for subjecting modulated ultrasonic signal to dynamic error compensation and the compensated signal can be subjected to frequency path linearization if appropriate and then fed to a loudspeaker. There is a carrier reduction arrangement. An independent claim is also included for a use of an ultrasonic reproduction device.