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...

This is the sound a hammer hammering down a nail into a plank, and also breaking the plank. Photo and recording by Erik Pålsson.

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...