All dead. All immortal.
'Maryanne Amacher (February 25, 1938, Kane, Pennsylvania – October 22, 2009, Rhinebeck, New York) was an American composer and installation artist. She is known for working extensively with a family of psychoacoustic phenomena called auditory distortion products (also known as distortion product otoacoustic emissions and combination tones), in which the ears themselves produce audible sound.'
For (much) more information go to: The Maryanne Amacher Archive