| Playlist: | Documentary |
| Category: | General |
| Added By: | playman |
| Date Added: | January 14, 2010 |
| Video description: Thomas Alva Edison was deaf, but that didn’t stop him inventing in 1877, the phonograph, a machine for recording and reproducing sound waves. | |
| Rating: |
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| Tags: | music waves wave sound milestones edison engineering phonograph thomas alva edison |
| Views: | 129 |




























































































































































































































