Underwater acoustic communication

Underwater acoustic communication is like talking to fish friends with singing. When fish want to talk to each other, they use sound waves to send messages. This is like when you shout across the playground to talk to your friends. But in the water, sound travels much faster and can be heard from very far away.

So, people who work underwater like scientists, divers, and engineers, also want to talk to each other or to machines in the water. But they can't use normal radios or phones because those signals can't travel through water.

Instead, they use special equipment that can create sound waves and send them through the water like a song. This special equipment is called a speaker and it is connected to a device that can turn messages into sound waves. This is like when you sing a song to remember a phone number or important information.

But the sound waves have to be very specific so that fish friends or machines can understand them. So scientists and engineers have to use special codes and signals to send their messages. They have to make sure the messages don't get mixed up with other sounds in the water, like waves, boats, or other sea creatures.

When the messages are received, they are turned back into messages that people can understand. This is like when you hear a song on the radio that you like and you sing it back to your friends.

Overall, underwater acoustic communication is like a special singing language that helps people talk to each other and their machines underwater.