Cats use their sense of hearing to communicate, hunt, and navigate their surroundings in a number of ways. Cats use vocalizations such as meowing, purring, and growling to communicate with other cats and humans. They also use their hearing to detect potential prey or threats, which helps them to hunt effectively. Additionally, cats use their hearing to orient themselves in their environment and to detect changes in their environment, such as the presence of other cats or predators.