Early recordings by Alexander Graham Bell are played for the first time.

The Lawrence Berkeley National
Laboratories says it has reconstructed sounds recorded in Alexander Graham Bell’s laboratory in the late 19th century.
Rather than trying to construct a machine to play the recordings, stored at the Smithsonian Institute, the researchers have
recovered what has to be described as muddy and difficult- to-understand audio using a 3D optical scanning technique.
According to Physorg.com, the LBNL scientists worked with digital capture specialists and museum curators to capture the samples using a system called
IRENE/3 D. This takes high-resolution images of the disks, which are then processed to minimize the noise caused by
damage and deterioration in the century and a quarter since the recordings were made.
The IRENE/3 D system then mimics a stylus moving across the disk to play back the recorded voices – without actually touching the disks.
The recordings had never been played, due to Bell’s paranoia. While working to improve the sound quality of Edison’s phonograph, he made the recordings and sent copies to the Smithsonian for storage – but since Bell didn’t want to risk his competitors having access to his work, he didn’t give the Smithsonian a device to play the recordings.
While it’s not known whether any of the recovered voices are those of Bell himself, the researchers say only three people worked in Bell’s Volta laboratory when the
disks were made: Bell, his cousin
Chichester Bell, and Charles Sumner Tainter.
The LBNL work is posted online along with samples of the recovered recordings. ®

Full credit for article – Richard Chirgwin @theregister.co.uk

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