Process and system for directional acoustic propagation

摘要

A process and a device for producing a directed audio sound (3) on the basis of an amplitude demodulated ultrasound carrier signal (2) of high intensity. Therein, in accordance with the invention, the sound emitted by the ultrasound emitter (1) is reflected by a reflector (5) to a new direction. By appropriate shaping of the reflector surface, the audio sound (3) can be focused. The level of the ultrasound carrier signal (2) can be dampened by coating of the reflector (5) with an appropriate absorptive material, so that in the ideal case only the acoustic audio signal (3) reaches of the listener (4).