Sound control method, sound control device, and electric vehicle

A sound control device applied to an electric vehicle using an electric motor as a power unit for traveling, comprising:

• one or more memory devices configured to store information on driving environment of the electric vehicle, information on surrounding environment of the electric vehicle, and information indicating a correspondence between a specific environmental state of the electric vehicle and a sound process specification;
• and
• one or more processors configured to perform various processing,
• wherein the one or more processors are configured to:
• generate an interior sound to be output from a room speaker of the electric vehicle;
• estimate an environmental state of the electric vehicle based on at least one of information on driving environment of the electric vehicle and information on surrounding environment of the electric vehicle;
• determine whether a process condition of the interior sound is satisfied based on the estimated result of the environmental state;
• and
• process the interior sound based on information on sound process specification corresponding to the estimated result of the environmental state used for the determination of the process condition and output the interior sound to the room speaker when it is determined that the process condition of the interior sound is satisfied.

An electric vehicle using an electric motor as a power unit for traveling, comprising:

• a room speaker;
• one or more memory devices configured to store information on driving environment of the electric vehicle, information on surrounding environment of the electric vehicle, and information indicating a correspondence between a specific environmental state of the electric vehicle and a sound process specification;
• and
• one or more processors configured to perform various processing,
• wherein the one or more processors are configured to:
• generate an interior sound to be output from the room speaker;
• estimate an environmental state of the electric vehicle based on at least one of information on driving environment of the electric vehicle and information on surrounding environment of the electric vehicle;
• determine whether a process condition of the interior sound is satisfied based on the estimated result of the environmental state;
• and
• process the interior sound based on information on sound process specification corresponding to the estimated result of the environmental state used for the determination of the process condition and output the interior sound to the room speaker when it is determined that the process condition of the interior sound is satisfied.