A vital sign monitoring apparatus is configured to measure a vital sign of a subject. The vital sign monitoring apparatus includes a wireless communication section configured to transmit and to receive various data including audio data, and a determining section configured to determine whether a given condition is met and to switch the wireless communication section from a power saving mode to a high performance mode when it is determined that the given condition is met. In the power saving mode, a processing related to the audio data is partially restricted. In the high performance mode, the restriction of the processing related to the audio data is removed.
