Various examples of the present invention relate to an apparatus and a method for removing noise from a reception signal and a transmission signal. A method for operating a sound system for removing noise from a reception signal and a transmission signal, according to an example of the present invention comprises the steps of: receiving power through a first path from another electronic device; receiving a plurality of signals including transmission signals from a plurality of microphones; generating first data by multiplexing the plurality of received signals on the basis of the received power; and transmitting, through the first path, the generated first data to the other device. In addition, other various examples are possible.