A portable terminal includes a breath determining unit that determines, when sounds having similar frequency components have been periodically detected in picked-up sounds, the detected sounds to be breath sounds. The portable terminal further includes a snore determining unit that determines, sound pressure of a determined breath sound has exceeded a first level threshold, the breath sound to be a snore sound. The portable terminal further includes an apnea determining unit that determines, when a silent interval has been detected between consecutive snore sounds determined, the detected silent interval to be an apnea state.
