What sound does a dolphin make?

Dolphins produce whistles, clicks, and sounds that resemble moans, trills, grunts and squeaks. They primarily use lower frequency vocalizations for communication and higher-frequency sounds in echolocation, to seek out food and other objects. read more

Dolphins can make a large range of different sounds using a unique part of their anatomy called nasal air sacs. Such air sacs are located just behind their blowhole. They produce three different varieties of sounds. Whistles. Modulated in frequency and usually used for communication. Burst-pulsed sounds. Also used for communication. Clicks. read more