Withings Sleep AnalyserOverview Withings Sleep Analyser is a sleep sensor placed under the mattress at chest level with a one time setup. It contains two sensors: a sound sensor that identifies audio signals specific to snoring & cessation of breathing episodes, and a pneumatic sensor that measures your respiratory rate, heart beats via ballistocardiography, and body movements across the mattress. Thus, Withings Sleep Analyser is a unique and innovative combination of two