DRIVER ASSISTANCE APPARATUS AND COMPUTER-READABLE RECORDING MEDIUM

A driver assistance apparatus includes: one or more processors; and one or more memories communicably coupled to the one or more processors. The one or more processors set a control mode of outputting a sound, to a first or second output control mode depending on a predetermined determination condition. The first output control mode includes outputting the sound continuously during travel of a vehicle, while changing the sound with magnitude of behavior of the vehicle. The second output control mode includes outputting, each time the vehicle travels through a predetermined segment of a planned travel route of the vehicle, a reward sound corresponding to stability of the behavior of the vehicle in the predetermined segment traveled. The one or more processors carry out processing of outputting the sound in the first or second output control mode set.