Abstract: An electronic device according to various embodiments comprises: a communication circuit configured to communicate with an external electronic device; a memory in which one or more sound sources and one or more test sounds for tinnitus frequency testing are stored; and at least one processor, comprising processing circuitry, wherein the memory can store instructions that when executed by at least one processor, individually and/or collectively, cause the electronic device to: transmit a first control message to the external electronic device so that the one or more test sounds are output through the external electronic device corresponding to an ear with tinnitus identified from among the left ear and the right ear on the basis of a first input; determine a tinnitus frequency corresponding to a test sound selected from among the one or more test sounds on the basis of a second input; and transmit a second control message to the external electronic device so that a second sound source obtained by removing a po