It is the objective of this study to collect scientific data of sleep apnoea syndrome patients´ cardiac and respiratory function by additional sensors.

Inclusion Criteria:

• patients with supected sleep apnoea syndrome and scheduled diagnosis at a sleep laboratory
• male and female patients aged at least 18 years
• persons who understand and follow the instructions of the study staff
• singed informed consent

Exclusion Criteria:

• persons being housed in an institution by court or governmental order
• pregnancy or breastfeeding
• patients who are not able to consent
• acute or chronic inflammations of the external and middle auditory canal
• abnormal anatomic proportionsof the external and middle auditory canal which are pathological or congenital, for example limitation of the auditory canal
• persons in a dependence or in an employment contract to the investigator
• participation in another study at the same time

Patients with or with supected sleep apnoea syndrome