What you hear is the sound of an old mystic engine, or something else, i donßt know. I made it with audacity. Use it if you want, you don´t have to ask me to. But i would be nice if you tell me, that you used it in something.
Switching on an old melitta coffee maker and letting it work for about three minutes until it finishes. Switch on / hiss / dripping / gurgling / switch off.