Multiphysics Modeling Helps SONAR “Listen” to Material

SONAR (SOund NAvigation Ranging) has been in use for decades to detect submerged objects, but researchers are finding how to extract new information from its echoes. With the help of multiphysics modeling software, a group of researchers at the NATO Undersea Research Centre in La Spezia, Italy, are studying how lowfrequency echoes can determine what an object is made of.