Voice processing device, operation method thereof, and vehicle control system comprising voice processing device

A voice processing device installed in a vehicle, the voice processing device comprising:

• a microphone configured to respond to a voice of a passenger in the vehicle and generate a voice signal associated with the voice of the passenger;
• a speaker configured to output a voice to the passenger in the vehicle;
• a memory;
• and
• a processor configured to load instructions stored in the memory and perform one or more operations according to an execution of the instructions,
• wherein, when a collision occurrence signal is received from a vehicle controller configured to control an operation of the vehicle, the processor outputs, as a voice, a conversation attempt message to the passenger through the speaker,
• processes response voice signals of the passenger with respect to the conversation attempt message received from the microphone, generates sound source location information indicating a sound source location of the response voice signals,
• groups the response voice signals according to the sound source location information, and
• outputs the grouped response voice signal.