‘Untitled (headphones)’ (2007) by Dave Dyment.
A pair of headphones is altered so that one earpiece becomes a microphone, picking up its own sound from the speaker and creating a continuous feedback loop, which is disrupted by attempts to listen closer.
Mark Shanley and Paddy Treacy
From the series ‘Sharp Suits’ (2013) by Mark Shanley and Paddy Treacy
Annoyed by the ridiculous client comments that come with the territory of being a graphic designer, Shanley and Treacy decided to turn their feedback into posters.