Classification of Obstructive Sleep Apnoea Severity using Snore and Breathing Sound Recordings in Adult Patients in a Home Setting – Validation with Simultaneous Home Based Polysomnography

Participants were approached by study staff and provided an explanation of the study. Eligible and willing subjects were consented, and patients were allocated a Patient Study Number (PSN). Following enrolment, subjects were required to complete standard sleep questionnaires and undergo the HBSS comprehensive sleep study (according to the standard CRS Sleep Lab protocol). Subjects completed all enrolment activities and snore/breathing recordings in a single, overnight visit. Participants were provided the smartphone Data was collected during an overnight sleep study (> 8 hours) on all consenting patients via simultaneous PSG and SleepCheck. Snore and breathing sounds via smartphone were collected via various smart devices, including an Apple iPhone 7. The smartphone was placed on the side table next to the bed. The smartphone microphone (at the base of the phone) was oriented towards the subject in the bed) and the screen faced upwards towards the ceiling. The sound recording commenced when lights were turned out and ceased when the patient woke the following morning. Where possible, ambient noise was minimised. The overnight sleep study occurred simultaneously with participants being given the questionnaires by a sleep physician and instructions on how to use the device overnight. Participants completed all enrolment activities and provided the device on a smartphone to record snore /breathing pattern overnight. The snore/breathing recordings were completed in a single, overnight visit. Data was collected during an overnight sleep study (> 8 hours) on all consenting patients via simultaneous PSG and SleepCheck. Snore and breathing sounds via smartphone were collected via various smart devices, including an Apple iPhone 7. These devices are battery operated (<5 volts) and did not have any physical contact with the subjects. The smartphone was placed on the side table next to the bed. The smartphone microphone (at the base of the phone) was oriented towards the subject in the bed)and the screen faced upwards towards the ceiling. The sound recording commenced when lights were turned out and ceased when the patient woke the following morning. Where possible,ambient noise was minimised. The study was completed overnight in the participants home environment.Overall duration of the study was overnight on a single night.