Edison's phonometer which measured the mechanical force of sound waves produced by the human voice. From George Bartlett Prescott The electric telephone, New York, 1890.

Edison's phonometer which measured the mechanical force of sound waves produced by the human voice. From George Bartlett Prescott The electric telephone, New York, 1890.
SuperStock offers millions of photos, videos, and stock assets to creatives around the world. This image of Edison's phonometer which measured the mechanical force of sound waves produced by the human voice. From George Bartlett Prescott The electric telephone, New York, 1890. by World History Archive/Image Asset Management is available for licensing today.
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DETAILS
Image Number: 1746-28992806Rights ManagedCredit Line:World History Archive/Image Asset Management/SuperStockCollection:Image Asset ManagementContributor:World History ArchiveModel Release:NoProperty Release:NoResolution:5401×3883
1890
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