hydrophone

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hy·dro·phone

 (hī′drə-fōn′)
n.
An electrical instrument for detecting or monitoring sound under water.

hydrophone

(ˈhaɪdrəˌfəʊn)
n
(Electronics) an electroacoustic transducer that converts sound or ultrasonic waves travelling through water into electrical oscillations

hy•dro•phone

(ˈhaɪ drəˌfoʊn)

n.
a device for detecting sounds transmitted through water, as for locating submarines or measuring the flow of water through a pipe.
[1855–60]
Translations