ECHO SUPPRESSION SYSTEM, ECHO SUPPRESSION METHOD, ECHO SUPPRESSION PROGRAM, ECHO SUPPRESSOR, SOUND OUTPUT DEVICE, AUDIO SYSTEM, NAVIGATION SYSTEM, AND MOBILE BODY

摘要

An echo suppression system includes a sound output device for outputting sound based on a sound signal, a sound input device for converting an input sound to a sound signal, and an echo suppressor for suppressing echo based on the sound output from the sound output device in the sound input by the sound input device. The sound output device has a section for passing the components of different frequency bands of a plurality of sound signals, a plurality of sound output sections for outputting the sounds based on the plurality of sound signals passed through the passing section, and a section for adding the plurality of sound signals passed through the passing section to generate a reference sound signal. The echo suppressor has an input section for receiving the sound signal from the sound input device as an observation sound signal, and a section for correcting the observation sound signal in order to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal. An echo suppression method, an echo suppression program, an echo suppressor, a sound output device, an audio system, a navigation system and a mobile body are also provided.