Before she dived, experts used microphones to listen to her acoustic signal to check for signs of stress.

Air bubbles interfere with acoustic signal detection, as do the engines of seafaring vessels and the whir and blip of other monitoring equipment.

These authors also showed that certain physical properties of the acoustic signal facilitated the development of the illusion.

The technology within the telephone increased how acoustic signal could be altered.

The charges are detonated by acoustic signal from the ship.