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1937 - for practice, the students can hear themselves through the earphones and be inaudible to others, except the instructor

HAMMOND ELECTRIC ORGAN

E&MP 88.015

Music Recording - Electronic

June 1937

Hammond organ school in operation.

For practice, the students can hear themselves through the earphones and be inaudible to others, except the instructor, who also hears through earphones, switching to the various students at will.

He can talk to them through the microphone.


Original Caption by Science Service
© Dr. W. E. Danforth, Bartol Research Foundation



National Museum of American History

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