InMono, public sound-amplifier

Submitted by: Jonas Ersland

The InMono by Jonas Ersland is a small contact-microphone-amplifier intended to be permanently placed on metal objects in public space. The very simple electronic circuit (only six components are used in total) generates soundwaves from vibrations naturally occurring in public objects like steel-constructions, fences and bridges.  Passer-bys can plug in their own headphones and experience  sounds in their surroundings that they didn’t know of. I built five InMonos which I attached to especially nice-sounding spots around Oslo. The sounds vary between the different locations, but it’s basically a deep and dry sound, like the song of a mechanical whale.