In addition to Vadim's answer. It is also subjective.
If a person is deaf from birth, then this state is familiar to him. And if a person loses hearing at a conscious age due to trauma? After all, being in a noise-canceling chamber, a person deliberately also does not expect sounds, since he understands what kind of place it is, but at the same time he also goes crazy (or rather, no one has gone there mentally, but most likely this is what should happen during a long stay ).
Your question is slightly wrong. Rather, it is built correctly, but there is one important caveat - in fact, a person goes crazy not from silence , but in silence . Panic attacks themselves occur due to the fact that the brain does not hear the surrounding sounds, but at the same time hears what it does itself. That is, if you fidget on a chair in a noise canceling chamber, you will hear a sound, but at the same time, no matter how hard you try, you will not hear the sound of wind, birds, cars, people, grass and all that. It is because of this that the brain does not understand what is happening. Then the sensitivity to sound increases and you begin to hear your own heart beating, and a long, rhythmic monotonous sound is one of the types of torture, by the way.
Therefore, there is little difference between completely deaf people and those who are isolated from external sounds. Maybe we should dig a little deeper into neurophysiology and psychology, but I'm not an expert in this. Try adding the tag "psychology" and submitting your question to the experts.
I think that in complete silence they also go crazy.
If there is external sound, then the body may well perceive sound waves (vibration) without a hearing aid. This does not mean that you will perfectly hear and perceive everything that happens, but there will be an effect of presence. Also, a deaf person who knows he is deaf does not expect to hear anything. His brain remains in a calm state.
A person who hears perfectly and is in complete silence may think that something is wrong either with him or with the environment. The brain will be in an agitated, anxious state. If you stay in this state for a long time, it is quite possible to go crazy.