Underwater sound refers to the transmission of sound waves through water. Unlike in air, sound travels faster in water, reaching speeds of about 1,500 meters per second. This phenomenon is crucial for marine life, as many species, such as whales and dolphins, rely on sound for communication, navigation, and hunting. The study of underwater sound is important for various fields, including marine biology and oceanography. Scientists use specialized equipment to measure sound levels and analyze how sound interacts with the underwater environment. Understanding underwater acoustics helps in monitoring marine ecosystems and assessing the impact of human activities, such as shipping and sonar use.