WordNet
acoustic device
n. a device for amplifying or transmitting sound
Usage examples of "acoustic device".
Captain Mackey once again gave the orders to prepare for a possible torpedo hit, and also to take evasive action by launching two ADC (Acoustic Device Countermeasure) Mk 2 decoys.
Since he did not know whether the search instrument was coupled with an acoustic device, he pulled the helmet of his special suit over his head and spoke into the mike: 'I can see you clearly!