Hydrophone. 20th-century hydrophone (underwater microphone) as used on 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.
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Details
Creative#:
TOP20028278
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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