Catathrenia - The rare sleep disorder you've never heard of

Living with Catathrenia:

His wife finally recorded his rare sleep disorder and showed him what having Catathrenia actually sounded like and also what he's put her through on a regular basis. He's had Catathrenia since birth and is intrigued at how many other people out there have it, if they make the same groaning noises and how it has affected their lives.

Sources:
http://www.britishsnoring.co.uk/catathrenia.php
https://www.sleepassociation.org/patients-general-public/catathrenia/
http://www.nosleeplessnights.com/catathrenia-are-you-making-strange-noises-while-sleeping/