Hydrophone, 20th century

Hydrophone, 20th century

C036/0819

Rights Managed

Caption

Hydrophone. British ships during World War I (1914-1918) and in later conflicts to detect the sound of a submarine's engines. The headphones (upper right) would be used to listen, while the microphone was lowered into the water. For a hydrophone, see image C036/0819.

Release details

Model release not required. Property release not required.

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