Artificial intelligence apparatus for recognizing speech of user and method for the same

An artificial intelligence (AI) apparatus for recognizing a speech of a user, the artificial intelligence apparatus comprising:

• a memory configured to store a speech recognition model;
• and
• a processor configured to:
• obtain a speech signal for a user speech through a microphone,
• extract a data feature set including a plurality of features from the speech signal,
• determine at least one abnormal feature among the extracted data feature set by determining an abnormal degree for each plurality of first features based on an extent that each feature deviates from a normal range using an abnormal feature determination model stored in the memory, wherein the abnormal feature determination model includes information on threshold ranges for the plurality of features and rank information on a rank of the corresponding threshold range to each of the plurality of features,
• generate feedback based on the determined abnormal feature, and
• provide the feedback for a conversion corresponding the speech signal,
• wherein the processor is further configured to convert the speech signal into a text using the speech recognition model,
• measure a confidence level for the conversion of the converted text, and
• perform a control operation corresponding to the converted text based on the measured confidence level.