Electronic device and control method thereof

An electronic device comprising:

• a microphone;
• at least one memory storing a wake-up word detection model, a wake-up word verification model, and one or more instructions;
• and
• at least one processor configured to execute the one or more instructions,
• wherein the one or more instructions, when executed by the at least one processor, cause the electronic device to:
• obtain a sound signal received through the microphone,
• input the sound signal into the wake-up word detection model,
• obtain, as an output of the wake-up word detection model, one or more first probability scores corresponding to one or more sections of the sound signal, wherein each first probability score of the one or more first probability scores represents a probability that a corresponding section of the one or more sections of the sound signal corresponds to a wake-up word,
• identify a first section of the sound signal, among the one or more sections of the sound signal, that corresponds to a first probability score, among the one or more first probability scores, that exceeds a first threshold value,
• based on identifying the first section of the sound signal, input the first section of the sound signal into the wake-up word verification model, and obtain, as an output of the wake-up word verification model, a second probability score corresponding to the first section of the sound signal and representing a probability that the first section of the sound signal corresponds to a wake-up word,
• based on the second probability score corresponding to the first section of the sound signal exceeding a second threshold value, execute a function corresponding to voice recognition, and
• based on identifying a predetermined acoustic signal in the sound signal, reduce the second threshold value.