DEVICE FOR CONTROLLING MICROPHONE ACCORDING TO CONNECTION OF EXTERNAL ACCESSORY, AND METHOD THEREOF

摘要

According to an embodiment of the present invention, an electronic device comprises: a housing including an opening at a part thereof; at least one microphone arranged inside the housing and exposed through the part; an earphone connector for accommodating an audio plug through the opening and including a first contact and a second contact related to sound output through the audio plug, a third contact connected to a ground terminal, and a fourth contact related to sound input through the audio plug; an audio circuit electrically connected to the earphone connector; a processor electrically connected to the microphone and the audio circuit; and a memory electrically connected to the processor. The memory may store instructions that, when executed, enable the processor to apply a bias voltage to the fourth contact through the audio circuit, to measure a voltage between the fourth contact and the third contact through the audio circuit, to measure an impedance between at least one of the first contact and the second contact and the third contact through the audio circuit, to activate the at least one microphone when the measured voltage is greater than or equal to a first threshold and the measured impedance is less than or equal to a second threshold, and to deactivate the at least one microphone when the measured voltage is greater than or equal to the first threshold and the measured impedance is greater than the second threshold. In addition, various embodiments recognized through the specification are possible.;COPYRIGHT KIPO 2019