Interactive art from 1970 - a 15ft hydraulic ‘cybernetic sculpture’ by Edward Ihnatowicz that reacted to nearby sound due to fitted sensors:
His ground-breaking sculptures explored the interaction between his robotic works and the audience, and reached their height with The Senster, a large (15 feet long), hydraulic robot commissioned by the electronics giant, Philips, in Eindhoven in 1970. The sculpture used sound and movement sensors to react to the behaviour of the visitors. It was one of the first computer controlled interactive robotic works of art.
There is a website dedicated to the project, where you can find out more here
