A terminal includes: a communication unit configured to communicate with a hands-free device and an audio device provided in a place in which speech is produced; and a control unit configured to perform control such that: i) when a filter generation mode is selected, a test signal is generated, ii) when a microphone signal transmitted from the hands-free device is received, the received microphone signal and the generated test signal are mixed, and the mixed signal is transmitted to the audio device, and iii) when a feedback signal transmitted from the hands-free device is received, a sound feedback removing filter is generated based on the received feedback signal, and the generated sound feedback removing filter is transmitted to the audio device.