![](https://coimages.sciencemuseumgroup.org.uk/64/17/large_thumbnail_2014_0044__0003_.jpg)
granular microphone in glass tube, 1878-1890
Granular microphone in glass tube, probably made by David Edward Hughes, England, 1878-1890
Details
- Category:
- Telecommunications
- Object Number:
- 1922-224/2
- Materials:
- glass, metal (unknown), wax and carbon
- type:
- microphone
- credit:
- Executors of the late Anna C. Hughes