acoustic mine

mine that reacts to the sound of nearby ships and submarines

An acoustic mine is a type of naval mine which monitors audio activity in its vicinity. Depending on its design, it will either actively send out audio pulses, not unlike a sonar, listening to the speed at which the echo returns to it or passively listen to its environment, depending only on the noise that is made without its interference.
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A mine with an acoustic circuit which responds to the acoustic field of a ship or sweep. See also mine. 1/8/76

Mine dont la mise de feu est actionnée par l'influence acoustique d'un bâtiment ou d'une drague. Voir aussi mine. 1/8/76

MINA ACUSTICA

Eng: acoustic mine
Urdu: جَہاز کے اِنجَنوں دھُرے اور دھَکیلچوں وَغیرَہ سے زیرِ آب پھَٹ جانے والی سُرُنگ ۔