i just saw - all prizes still in Deutsche Mark, a bit out of time... i got a vague feeling this could be somekind of forgotten satirical project ...???
but no, if you read this http://www.bpes.de/en/wir_e.html ...
I think it's something like "pleasing tones" or ambient music. You know how one can buy a "white noise" machine that just plays sounds of surf or jungle or rain? Over and over so your body and mind relaxes so you can get a good nights sleep?
It's gotta be better than the sounds of traffic or sirens or your neighbours TV. Right?
One of the disadvantages of living in a big city, I guess....