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MIT researchers have built a battery-free pinpointing system dubbed Underwater Backscatter Localization (UBL).

"Robertina Šebjanič is one of those rare artists who brings as much attention to the aesthetics and concepts behind her artworks as to the meticulous scientific research that sustains them. Her installations, sound experiments and performances invite us to reflect upon our relationship as human beings with the rest of the world. Over the past few years, she has been collaborating with scientists, hackers, thinkers and other artists to explore themes such as interspecies communication, underwater sound pollution, the possible coexistence of animals and machines, chemical processes, the origin of life, etc. "

"The Discovery of Sound in the Sea website will introduce you to the science and uses of Sound in the Sea. There are several major sections on the site such as The Science of Sound in the Sea, People and Sound in the Sea, and Animals and Sound in the Sea. You will find the site's Audio Gallery a fascinating place to visit where you can listen to underwater sounds created by marine animals, human activities, and natural phenomena such as lightning, earthquakes, and rain. Check out the Technology Gallery and discover a variety of equipment that uses sound to investigate the ocean. Watch video interviews with scientists that study how marine animals produce and hear sounds. Investigate how scientists use underwater acoustics to track ocean currents, identify potential obstacles, and quantify fish distributions. There are also resources for many specialized audiences, including teachers, students, the media, and decision makers."

"[ Michel Redolfi ] Trailer HD concert "Sonic Waters" (Bruxelles, 25 11 2018)" See also Max Neuhaus Underwater Music

Journal articles focused on underwater listening.

"The ocean might seem like a quiet place, but listen carefully and you might just hear the sounds of the fish choir. Most of this underwater music comes from soloist fish, repeating the same calls over and over. But when the calls of different fish overlap, they form a chorus."

The Underground Sound Project is a collection of underground sound recordings made by artist Nikki Lindt over the course of the past year. They were made in Prospect Park, other parks in the five boroughs of NYC and in rural Cherry Valley, NY. The recordings are made by placing microphones underground, underwater and even inside trees. So put on your headphones and come explore the melodic, resonant, and otherworldly sonic ecosystem right beneath our feet!!

"Some people prefer utter silence as they kayak down a river. The ambient sounds of birds flapping their wings or water whooshing beneath them is sufficient. Others, however, might opt for a little music. Or how about some eerie, underwater sounds that can help scientists track pollution and climate change?"

"Artist Jana Winderen transports us underwater, to listen to the sonic wonders of the sea."

"Researchers in Indonesia have developed an innovative way to remove microplastics from water without the need for expensive filters. It works, says Dhany Arifianto, an engineer at the Institut Teknologi Sepuluh Nopember in Surabaya, Indonesia, by passing contaminated water through a pipe, while underwater speakers make the pipe vibrate like the sound board of a guitar."

"What do you hear when you think of the Arctic and Antarctic? "Singing" ice, a seal that sounds like it is in space, and a seismic airgun thundering like a bomb are some of the noises released by two marine acoustic labs. The project introduces the public to 50 rarely heard sounds recorded underwater in the polar regions. It highlights how noisy oceans are becoming due to increased human activity that also disrupts sea life."

"You can look across a vast expanse of ice, all white and blue and cold, and see nothing. The lead is choked with pack ice or sealed over with newly formed ice, and there is no movement or sound. With few birds, no whales and no bears, one might mistake the Arctic for a desert. But if you go down to the ice edge, pick a hole in the new ice deep enough to reach water and drop in a hydrophone (an underwater microphone), the cacophony is astonishing. "

"Artist Jana Winderen transports us underwater, to listen to the sonic wonders of the sea."

"Some of the most challenging, rewarding, and fun sounds to record are those within the vast spectrum of fluids. Wet, sticky, viscous, mushy; the tactful use of fluid sounds can reinforce the realism and impact of a scene, or just be the punchline of a joke. In order to effectively communicate an idea to an audience, there are a few challenges in recording fluids to consider before dipping your toes in. While most of these considerations are technical in application, they all serve to realize an idea and bolster the narrative. For live-action projects, capturing the complexity of fluid sounds on location can often range from impractical to impossible, which is where foley steps in."

Build a Hydrophone - Tutorial"