A sound generator device includes an acquisition unit configured to acquire biological information on a subject user, an estimation unit configured to estimate, based on the biological information, a mind and body state relating to sleep of the subject user. The sound generator also includes a sound generator configured to output a sound signal based on a plurality of control patterns stored in advance and a sound generator control unit configured to select, based on the estimated mind and body state, at least one control pattern among the plurality of control patterns. The sound generator outputs the sound signal based on the at least one control pattern.
