https://www.lubell.com/

Lubell underwater loudspeakers and systems are ideal for synchronized swimming practice or competition, competitive swimming, lap swimming, diver recall, sub-bottom profiling systems (SBP), acoustic tomography, oceanography studies, research in underwater acoustics, acoustic soliton modeling, SCUBA instruction, commercial and military diver recall, cave exploration, marine biology, underwater music festivals, underwater movie production, NASA NBL and RKA Neutral Buoyancy Labs, music therapy, dive boats, dolphin and whale communication, accelerating plant growth in hydroponic facilities, reducing degassing times in breweries, repelling fish and waterfowl from contaminated waters and hydroelectric facilities, and installation in residential, hotel, and university swimming pools.

Lubell Underwater Loudspeakers have been used in the production of many movies with water or underwater scenes including: James Bond Skyfall, Benji, Flipper, Free Willy, Seaquest DSV, The Abyss, Titanic, Waterworld, Event Horizon, Saving Private Ryan, Entrapment, The Mummy, The World Is Not Enough, Jason and the Argonauts, 102 Dalmatians, Harry Potter, and more.