FEEDBACK APPARATUS OF AUDIO SIGNAL FOR HANDPHONE AND TRANSFER METHOD OF SOUND SOURCE USING THE APPARATUS

The present invention relates to an audio signal feedback device for a mobile phone and a sound source transmitting method using the same to achieve audio signal feedback of an earphone through an ear microphone by connecting an earphone terminal and an ear microphone terminal, which are provided in an ear jack. An audio signal feedback device of the present invention includes: an ear jack connector (1) inserted into an ear jack of a mobile phone; an audio output terminal (2) to output an audio signal, whereby a left audio terminal (L) signal and a right audio terminal (R) signal of the mobile phone are combined; a conversion circuit (5) to convert the audio signal outputted from the audio output terminal (2) into an ear microphone signal; an ear microphone terminal (3) to send the audio signal converted to the ear microphone signal to an ear microphone terminal (M); and a connection line (4) to connect the audio output terminal (2) and the conversion circuit (5), and to connect an output of the conversion circuit (5) to the ear microphone input terminal (3). When the present invention having the above configuration is used, test related costs can be reduced, tests can be more convenient and accurate, and test productivity can be high. The sound source (music, sound) can also be transmitted to a counterpart in a smartphone.