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SCIENCE STUDIES THE NEGRO SPIRITUAL FACIAL EXPRESSION

E&MP 89.006

Music Recording

no date

Legend - Another film record of a singer's voice.

record of the singer's voice, are made by a tuning fork vibrating a hundred times a second and the line with the longest undulations represents his breathing

The longer waves are made by the tuning fork, vibrating a hundred times a second, so that the waves of the irregular voice record between the same part of two successive waves of the fork, as between C and D, show what happened in a hundredth of a second.

This was a more complicated sound than the voice wave in the other record, which showed almost a pure note.


Original Caption by Science Service



National Museum of American History

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