How Noise Pollution Interferes with Echolocation
In fact, this world of sound is so important to whales and dolphins that they rely on it to navigate the waters, to hunt and feet, to communicate with others, to mate, and form bonds with their offspring. This sensitivity to sound, and the fact that it is such an intricate part of their lives, is why the use of sonar testing and other acoustic pollution created by humans is having such a devastating effect on cetaceans resulting in confusion, loss of communication ability, and even death in many animals. (To learn more about the harmful effects of sonar and noise pollution on marine life, check out Detrimental Effects from Anthropogenic Noise on Marine Life.)
The issue of sound is also one of the reasons why keeping dolphins in captivity is so harmful to the marine mammals. The small enclosed nature of most tanks creates a constant reverberation of sound that can be disorienting, even maddening, for a dolphin that has been captured and forced into a tank.
This issue is such a problem that many, such as the UK, have taken steps to abolish marine mammals captivity all together. Several conservationist and animal rights groups are calling for the same type of measures in the US. As we have learned more about the biology and behavior of dolphins and other marine mammals including their reliance on sound, we have learned that keeping a dolphin in a tank is not a healthy situation...dolphins belong in the ocean where they can swim and communicate properly.