posting an UBU link just to see how it shows up on here - and also to share awesome art of course. Nancy Holt & Richard Serra - Boomerang:

...'is a tape which analyzes its own discourse and processes as it is being formulated. The language of Boomerang, and the relation between the description and what is being described, is not arbitrary. Language and image are being formed and revealed as they are organized.'

https://ubu.com/film/serra_boomerang.html

UbuWeb Film & Video: Richard Serra - Boomerang (with Nancy Holt) (1974)

@rpmr Perfected to a useful speech jamming appliance by Kazutaka Kurihara (winning an #Ignobel in 2012) 😊

By popular demand, they released a free app that lets you experience the speech-inhibiting effect using your own computer.

https://sites.google.com/site/qurihara/top-english/speechjammer

Kazutaka Kurihara - SpeechJammer

SpeechJammer: A System Utilizing Artificial Speech Disturbance with Delayed Auditory Feedback