Voice of Thomas Edison's talking doll is heard again after 123 years as scientists crack the code of mysterious metal ring | Mail Online

Voice of Thomas Edison's talking doll is heard again after 123 years as scientists crack the code of mysterious metal ring  Mail Online

Hidden secret: The 2.5 inch around and half an inch wide ring was bent and damaged so the tune could no longer be played.

Digital sound: The recording was converted onto a computer

Listen to the audio recording.