How do dolphins hear underwater?
Answers
Dolphins use small ear openings on both sides of their heads to listen to or hear sounds. ... To hear sounds underwater, they make use of their lower jawbone, that conducts sounds to their middle ear. Dolphin sounds are used for communication between dolphins as well as to locate objects and organisms underwater.
Answer:
Dolphins use small ear openings on both sides of their heads to listen to or hear sounds. These small openings are what they would usually use for hearing when they are not underwater. To hear sounds underwater, they make use of their lower jawbone, that conducts sounds to their middle ear.
Dolphin sounds are used for communication between dolphins as well as to locate objects and organisms underwater. There's even evidence that dolphins "talk" to each other assigning certain sounds as names.
Echolocation
Dolphins use echolocation underwater, much like whales do. Echolocation allows dolphins to locate objects underwater by transmitting sound waves. They generate a high-pitched sound pulse or click in their foreheads that send sound signals into the water. The echo produced by the sound bouncing off objects helps the dolphins in locating the objects, even determining how far away the objects are located.
The dolphins sense the returning sound vibration by feeling the pulses on their jaws. Each object or animal underwater sends off different echoes, which the dolphins can differentiate. Echolocation helps dolphins determine not only the distance of an object but also the texture, shape and size of the object. It works because water is an excellent sound transmitter, which can transmit sound five times faster compared to air.
Dolphins use this in order to communicate with each other, understand the location of predators and find/capture food.
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