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Gentler sonar

  • June 26, 2022
  • Posted by: OptimizeIAS Team
  • Category: DPN Topics
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Gentler sonar

Subject: Science

  • Scientists at the Defense Advanced Research Projects Agency in the United States are working to replace whale-harming sonar with the ambient sounds made by aquatic creatures.
  • The low-frequency booms of giant goliath groupers (Epinephelus itajara) and the super-loud snaps of pistol shrimp are among the sounds being considered.

Sonar and Whales

  • Active sonar, the transmission equipment used on some ships to assist with navigation, is detrimental to the health and livelihood of some marine animals.
  • Research has recently shown that beaked and blue whales are sensitive to mid-frequency active sonar and move rapidly away from the source of the sonar, a response that disrupts their feeding and can cause mass strandings.
  • Some marine animals, such as whales and dolphins, use echolocation or “biosonar” systems to locate predators and prey.
  • It is conjectured that active sonar transmitters could confuse these animals and interfere with basic biological functions such as feeding and mating.
  • The study has shown whales experience decompression sickness, a disease that forces nitrogen into gas bubbles in the tissues and is caused by rapid and prolonged surfacing.
  • Although whales were originally thought to be immune to this disease, sonar has been implicated in causing behavioral changes that can lead to decompression sickness.
Gentler sonar Science
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