Noise estimation device and vehicle control device

A noise estimation device, which is applied to a vehicle provided with a power source and a power transmission mechanism that transmits power output by driving the power source, the noise estimation device comprising:

• an execution unit;
• and
• a storage device, wherein:
• the storage device stores mapping data which is data defining a mapping learned by machine learning;
• when variables on an output of the power source and variables indicating a state of the power transmission mechanism are input to the mapping as input variables, the mapping outputs, as output variables, variables indicating a sensory level of noise caused when rattling sound generated by an operation of the power transmission mechanism is transmitted to a cabin of the vehicle;
• and
• the execution unit is configured to:
• acquire the variables on the output of the power source and the variables indicating the state of the power transmission mechanism as values of the input variables;
• and
• estimate the sensory level based on values of the output variables output from the mapping by inputting the values of the input variables into the mapping.