That's very interesting. I experience something similar when tired. Hypnogogia is a hallucinatory state experienced related to sleep and tiredness and I have

That's very interesting. I experience something similar when tired. Hypnogogia is a hallucinatory state experienced related to sleep and tiredness and I have experienced a wide variety of things in that state. Eg. half-opened eyes, seeing my room perfectly with a clock that showed the correct time but when i open my eyes fully there was no clock. Also auditory things as you describe. Replays of other sound.