 A total number of 45 participants will be recruited from an OSA population, aged 1865. Participants will consist of male and female patients diagnosed with moderatesevere OSA Apnea Hypopnea Index AHI greater than or equal to 15 per hour. Eligible participants, according to the protocol approved by the HREC, providing written informed consent will be enrolled into the study. Patients will be enrolled sequentially according to the randomisation list. Patients will be randomised to APAP or APAP with the addition of the SensAwakeTM modification. The investigator and study staff will be blinded to the treatment of any participant. 