Sounds in the night: the hum, schizophrenia and genius
Hearing sounds that no one else can hear is worrying. It is akin to hearing voices or feeling that there is someone sitting on your shoulder inspecting and criticising all that you do. In other words - a sign of madness.
The rumbling sound I heard then I still hear, but it disturbs me less. It was worrying me, and it was that anxiety rather than the noise itself that was keeping me awake. I felt that if I made an effort not to hear it, and to concentrate on the sounds that I knew were there, then it would fade, and so it has. If I listen for it, I know I will hear it, so I don't and it goes - or at least vanishes from my consciousness.
It is what we all do, I think. The buzz of a faulty piece of apparatus, the flashing light at the peripheral of our vision, the irritating chatter - we filter them all out. The inability to filter really is a sign of madness. It is thought by some that schizophrenics, for example, have a faulty filter. In fact it is used as a test for the condition. Schizophrenics take in everything, and are consequently perpetually overstimulated. But being stimulated like this, from many different sources, and then putting all those sources together to make something new is also the ability of the genius.
I think, given the choice, I would choose sanity.