{"id":262,"date":"2019-03-21T18:11:08","date_gmt":"2019-03-21T18:11:08","guid":{"rendered":"http:\/\/roch.sdsu.edu\/?page_id=262"},"modified":"2019-07-20T17:53:09","modified_gmt":"2019-07-20T17:53:09","slug":"k12","status":"publish","type":"page","link":"https:\/\/roch.sdsu.edu\/index.php\/k12\/","title":{"rendered":"Whales and AI for children"},"content":{"rendered":"

For kids from ages 5 to 92…<\/h2>\n
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Dolphins, whales, seals and sea lions, oh-my!<\/h1>\n

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Visit this interactive museum exhibit designed by our friends at The Scripps Institution of Oceanography Whale Acoustics Lab.\u00a0 You can hear the sounds produced by many of the animals that we study in MAR lab as well as play games and watch short videos about the various ways we study these animals.<\/p>\n

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How do animals produce sound?<\/h1>\n

Many animals, including us, squeeze their lungs to force air up their throat and out of their mouths.\u00a0 The air particles bounce against one another, a bit like a bumper cars.\u00a0 One particle bounces into another, it rebounds and hits another, and so on.\u00a0 We can see how this works below.\u00a0 Pay close attention to the particles marked in red.\u00a0 They go back and forth as they hit other particles.\u00a0 Even though each particle just moves back and forth, it looks like the particles are traveling across the screen.\u00a0 You hear when the last set of particles hit your ear.<\/p>\n

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Areas where there are lots of particles have high pressure and we see “waves” of high pressure regions.\u00a0 The more closely spaced the waves are, the higher we hear the pitch.<\/p>\n

Not all animals squeeze air out of their lungs.\u00a0 Dolphins for example, cannot breathe underwater and have a system near their blow hole that moves air around that area and across their sound producing “monkey lips,” the dolphin equivalent of your vocal folds (voice box).<\/p>\n

Some animals do not use air in their bodies at all to produce sound.\u00a0 Many insects rub two body parts together to create sounds.\u00a0 As an example, crickets have a saw-like structure on the bottom of their upper wings called a file.\u00a0 On the top of the lower wing, a scraper called the plectrum sticks out.\u00a0 When they rub the wings across each other, it produces sound, much like if you run your fingernail across a comb.<\/p>\n

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File on a cricket wing (Montealegre 2008 J Exp Biol)<\/p><\/div>\n

You can see a video of a cricket doing this at full speed and then slowed down here:<\/p>\n

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