Kuma wrote:
It is the brain making patterns out of chaos. The same thing happens out at sea. The random sounds make patterns that can be made out to be voices or music. Many a sailor of olden days believed to have heard sirens and such. I have heard many a voice from the ocean and many a song from random noise.
i sometimes hear "music" as well f.ex. from engines, hoovers etc., but i have to be relaxed or not really listening to it, the music kind of emerges from the original noise and detaches itself from it, do i make sense,
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i wonder whether it has to do with overtones:
http://www.overtone.cc/video/what-are-overtones
here is an interesting demonstration, bear with it until he starts to sing, it's in german, but the english subtitles are of good quality.