ON-VEHICLE GUIDANCE APPARATUS

摘要

An on-vehicle guidance apparatus is characterized by having an output sound control means which acquires a set sound volume of on-vehicle apparatuses, a sound volume judgment means which judges whether the set sound volume is smaller than a predetermined threshold, and a guidance output control means which issues an instruction to carry out voice guidance when receiving a judgment signal from the sound volume judgment means at a time when the set sound volume becomes smaller than the threshold.