I often hear voices and other noises while drifting into sleep. I also see faces of people I don't recognise while laying in bed at night prior to sleep.
I believe that we move our awareness into other dimensions/worlds/planes of existance. And that we live life there as we do here only using different bodies.
In this world, I sometimes hear noises that others don't...inner noises such as an electrical hum. I've heard this noise ever since I can remember.
There are many other experiences that I've had over the years, but due to listening to others say they stopped happening, I've been regaining what I had lost.