Masters Swimming name many reasons for continuing to swim. But no reason is more pure than Wayde Mulhern's, which he often implements after a bad day at work. Mulhern, a software engineer from Blaine, was one of about 30 swimmers who competed Sunday in the swimming portion of the Star of the North State Games at the Rochester-Olmsted Recreation Center.
Eight Rochester swimmers competed. About 40 people in the Rochester area are registered in the masters swimming program, which involves men and women ages 19 and older. There are about in Minnesota, 37, nationally. Swimmers join the masters program to compete and for camaraderie. Part of the organization's purpose is to help members learn about aging. Mulhern, 40, who was once ranked in the top 10 swimmers in the nation, said he's seen some remarkably spry swimmers at masters competitions.
And some have made him feel remarkably slow. He once lost a race to several swimmers who were in their 70s and 80s. Why would this happen? Switch roles. Have your helper listen while you make the sounds. Discuss the findings you gathered. Do patterns appear? Can you conclude something about how humans perceive sounds when submerged in water?
Extra : Test with more types of sounds: soft as well as loud sounds, high- as well as low-pitched sounds. Can you find more patterns? Extra: To investigate what picks up the sound wave when you are submerged, use your fingers to close your ears or use earbuds when submerging your head.
How does the sound change when you close off your ear canal underwater? Does the same happen when you close off your ear canal when you are above water? If not, why would this be different? Extra: Go to the swimming pool and listen to the sound of someone jumping into the water.
Compare your perception of the sound when you are submerged with when your head is above the water. How does your perception change? Close your eyes. Can you tell where the person jumped into the water when submerged? Can you tell when you have your head above the water?
Extra: Research ocean sounds and how sounds caused by human activity impact aquatic animals. Build a Cooler. Holes That Do Not Leak! Lift a Large Load Using Liquids. Get smart. Sign up for our email newsletter. Sign Up. Support science journalism. Knowledge awaits. See Subscription Options Already a subscriber?
Create Account See Subscription Options. Continue reading with a Scientific American subscription. Subscribe Now You may cancel at any time. It automatically vibrates the skull, and from that, your ears. To maximize those sounds in the Wet Sounds performances, Cahen uses powerful underwater speakers, not unlike the ones the military use to communicate with divers.
They were hearing insane noise. The idea for Wet Sounds materialized nearly ten years ago, when Cahen became intrigued by the idea of underwater speakers, and the fascinating relationship between sound and water.
In , Cahen commissioned a selection of immersive underwater sounds from all around the world for the first iteration of Wet Sounds. What began as a brief tour to several pools in the UK has since evolved into worldwide operation involving visual installations, aquatic therapy for special needs children and adults, water instruments, scuba performance art, and music both above the surface and underwater.
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