Corpse Husband suffers from Gastroesophageal reflux disease (GERD), which results in stomach acid coming up to the esophagus which in turn can irritate the vocal chords and cause the person's voice to get deeper or raspier over time.

Why does corpse husband have such a deep voice?

Personal life. Corpse is chronically ill, and has conditions such as fibromyalgia, thoracic outlet syndrome and GERD, the latter of which has partially caused his voice to become deeper.

Is corpses voice fake?

For one thing, many of his fans have questioned whether his voice is real or altered in some way. The truth, however, is that his voice is completely his own, and is not aided by any kind of editing or hardware.