In this recording you’ll hear an old air compressor in use. Air compressors are devices that convert power into energy. Usually they are powered by either...

The sound of the hot air pump, manufactured by Sanyo in 1995, can be heard alongside with the wall clock. Photo and recording by Helena Törnqvist.

In the audio you can hear the start up sound of an old air compressor. Air compressors are devices that convert power into energy. Usually they are powered...

Stuttgart 21 is one of the biggest construction projects in Germany. It includes the underground construction of a new central station for the city of...