1034 - How the telephone works

Object Type: Asset

Expand to show object metadata

1034 - How the telephone works

The principle of sound transmission and an examination of the component parts of the microphone and receiver of a modern telephone. The principles of sound transmission are explained by means of animated diagrams and a boy's model telephone. The film then goes on to show the component parts of the microphone and receiver of a modern telephone and to show how the apparatus works.

Catalogue

Finding Number: FILM/42

Date: 1938

Period: 1930s

Level: Item

Distribution: Theatrical distribution

Film function: Informational (public)

Film subject: Telecommunications technology and history

Year: 1938

Repository: BT Archives (ARCHON 1814)

Show more ▼