Underwater acoustic wireless communication using TCP/IP

https://techxplore.com/news/2023-03-underwater-acoustic-wireless-communication-tcpip.html

"Arduino controllers... piezo-electric transducer speaker produce low-frequency... same type piezo-electric transducer receiver microphone detects incoming signal... transmit and receive information within 1 to 3 kHz band 200 bps acoustically through water and send information from web page converted into Morse code through water, then decoded and display on computer at receiving end. TCP/IP internet protocol... 25m... could be run from... simple wireless telemetry and remote control of underwater devices"

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