Abstract: A system for determining a set of at least one cardio-respiratory descriptor of an individual during sleep comprises a memory device having a first accelerometer for a thoracic position, a second accelerometer synchronized with the first and for an abdominal position, and an optional sensor (e.g., a photoplethysmographic sensor). The system also includes memory for recording accelerometer and optional sensor data; memory with a reference model; and a device for filtering accelerometer data and configured to extract low-, medium-, and high- frequency ranges. A computer is configured for determining, within the extracted frequency ranges, at least one characteristic representative of a cardio-respiratory and physiological state and the time of the extraction thereof; comparing the determined characteristic(s) with similar characteristics from the reference model; and deducing therefrom a set of at least one probable corresponding event the individual experienced during a predetermined period of time.

Abstract: A signal-processing method comprises storing, in memory, a first initial signal generated by a first set of at least one three-axis accelerometer positioned in a thoracic position of an individual. A second initial signal, generated by a second set of at least one three-axis accelerometer in an abdominal position of the individual, is also stored in the memory. The second initial signal is synchronised with the first initial signal. The data of the first initial signal is processed to compute a first final vector, representing thoracic forces experienced by the first set of at least one three-axis accelerometer. The data of the second initial signal is processed to compute a second final vector, representing abdominal forces experienced by the second set of at least one three-axis accelerometer.

Abstract: A system for determining a set of at least one cardio-respiratory descriptor of an individual during sleep comprises a memory device having a first accelerometer for a thoracic position, a second accelerometer synchronized with the first and for an abdominal position, and an optional sensor (e.g., a photoplethysmorgraphic sensor). The system also includes memory for recording accelerometer and optional sensor data; memory with a reference model; and a device for filtering accelerometer data and configured to extract low-, medium-, and high-frequency ranges. A computer is configured for determining, within the extracted frequency ranges, at least one characteristic representative of a cardio-respiratory and physiological state and the time of the extraction thereof; comparing the determined characteristic(s) with similar characteristics from the reference model; and deducing therefrom a set of at least one probable corresponding event the individual experienced during a predetermined period of time.