ocean acoustic tomography

Ocean acoustic tomography is a technique used to study the ocean by measuring how long it takes sound to travel through the water. This method can determine various physical qualities of seawater, such as its salinity, pressure, and temperature (when it's called acoustic thermometry).1

This technique is part of broader acoustic and satellite sensing methods used in oceanographic research, offering a wide view of ocean processes that are not accessible to ships alone. By monitoring the travel time of sound pulses with an array of systems, ocean acoustic tomography can gather significant data on averaged oceanic properties efficiently. Sound travels very well through water, and its speed is influenced by temperature, salinity, and pressure, making it a useful tool for understanding these ocean characteristics.23