Wireless sensor node for respiratory sounds monitoring

Development of wearable sensor node for continuous monitoring of respiratory sounds presents several research challenges. In this article we analysed power consumption of such node in scenarios of on-node signal processing, and compressive sampling with low frequency data streaming. Onset of requirements defined by each scenario, we reviewed state of the art of recent commercial off-the-shelf (COTS) components for implementation of the sensor node. Power consumption on component scale was modelled by their spreadsheet data, and on scale of sensor node by behavioural diagrams. As a result, we estimated total sensor node power consumption and compared consumption shares of each subsystem. Total power consumption was estimated to 1.2-1.4 mW for continuously operating node.