If someone is born completely deaf, they would b incapable of going loopy this way bcos the brain hasnt developed the hearing skill.
Therefore, unable to find something to listen to (such as generating tinnitus tones or listening to the heartbeat)
"What they've found is that when all outside noise is removed from an enclosure, human hearing will do its best to find something to listen to. In a room where almost 100% of sound is muted, people begin to hear things like their own heartbeat at a greatly amplified volume. As the minutes tick by in absolute quiet, the human mind begins to lose its grip, causing test subjects to hallucinate." Quoted from the article