Patent ID: 7424118
Filing Date: 2008-09-09
Classification: G10L,H04R,H04S

Abstract:
1. A moving object equipped with ultra-directional speaker, said moving object comprising: a voice recognition and generation device for performing voice recognition on a voice detected by a voice detecting device, and for generating a voice signal; a modulator for modulating an ultrasonic carrier signal with the voice signal from the voice recognition and generation device so as to output a modulated voice signal; an automatic gain control device for measuring a distance between said moving object and a target and controlling gain adjustment of a sound level of said modulated voice signal based on said distance between said moving object and said target; and an emitter for emitting the modulated voice signal adjusted by the automatic gain control device, wherein when starting or ending generating said voice signal, said voice recognition and generation device sends a talk event signal to the automatic gain control device so as to respectively start measuring or stop measuring said distance between said moving object and said target.