an ear cap at least a portion of which is configured to be inserted into a user's ear;

a data input unit to which audio data is input from an external terminal;

an output unit configured to output the input audio data;

an audio detection unit configured to detect an externally generated audio signal;

a determination unit configured to determine at least one of a class and volume of the audio signal by analyzing the audio signal detected by the audio detection unit; and

a control unit configured to control output of the audio data input from the data input unit on the basis of information determined by the determination unit,

wherein the determination unit analyzes the audio signal using an artificial intelligence algorithm that is pre-loaded into the determination unit, and

wherein the artificial intelligence algorithm monitors and records manual operations of the user in accordance with a result value of the audio signal determined by the determination unit.