Electroencephalophone

An electroencephalophone or encephalophone is an experimental musical instrument and diagnostic tool which uses brain waves (measured in the same way as an EEG) to generate or modulate sounds.

Dr. R. Furth, a mathematical physicist, and Dr. E.A. Bevers, a physiologist, invented the encephalophone in the early 1940s at the University of Edinburgh. The cross between an electroencephalograph (EEG) and sonar technology, it was meant to be a way for ordinary physicians to diagnose neuropathologies.