acoustic torpedo

noun

1. a torpedo guided by sound that either emanates from the target or is emitted by the torpedo and bounces off the target.

Example Sentences

An acoustic torpedo hit the ship with devastating force.

From Washington Times

This acoustic torpedo was equipped with a 500-watt speaker that popped out of its nose and played “tactical sounds” to decoy enemy ships, and then, like all the rest, self-destructed.

From Slate

A helo dropped a Bloodhound�a practice acoustic torpedo of a type that would carry a nuclear warhead in battles.

From Time Magazine Archive