Charging control systems and methods are provided for controlling noise emission levels when charging an electrified vehicle. The nose emission levels may be controlled based on one or more user-defined rules associated with a custom quiet zone. The charging control systems may include one or more user interfaces designed to allow users to establish the user-defined rules which bound the custom quiet zone.

A battery electric vehicle that uses an electric motor as a traction power unit includes one or more speakers that output sound to at least one of inside and outside of the vehicle, one or more processors, and one or more storage devices for storing usage state information of the electric vehicle and sound source data. The one or more processors estimate fitness of the battery electric vehicle based on the usage state information. The one or more processors generate, based on the sound source data, a sound in accordance with the fitness. The one or more processors are configured to output the generated sound through the one or more speakers.

A control apparatus, which controls a drive motor that drives a rotor installed in an electrical aircraft, instructs the drive motor to selectively operate in at least two motor-control modes. The at least two motor-control modes include a flying motor-control mode for causing the electrical aircraft to fly, and a cleaning motor-control mode for cleaning the rotor. The control apparatus controls, in the cleaning motor-control mode, the drive motor such that a rotational frequency of the drive motor is lower than a predetermined human-audible frequency range.