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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Used to be, if you happened on a great tune on the radio, you might miss hearing what it was.
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3 .Of course, now you can just Shazam it.
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4 .let your smartphone listen, and a few seconds later, the song and performer pop up.
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5 .Now scientists have developed a similar tool, for identifying dolphins.
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6 .Every dolphin has a unique whistle.
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7 .Like this: Dolphin whistle.
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8 .Or this: Different dolphin whistle.
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9 .They use their signature whistles like names: to introduce themselves, or keep track of each other.
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10 .Mothers, for example, call a stray offspring by whistling the calf's ID.
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11 .To tease apart who's saying what, researchers devised an algorithm based on the Parsons code,
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12 .the software that mammals, I mean that fishes songs from music databases, by tracking changes in pitch over time.
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13 .They tested the program on 400 whistles from 20 dolphins.
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14 .Once a database of dolphin sounds was created, the program identified subsequent dolphins by their sounds nearly as well as humans who eyeballed the whistles' spectrograms.
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15 .The findings appear in the journal PLoS ONE.
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16 .Seems that in noisy waters, just small bits of key frequency change information may be enough to help Flipper find a friend.
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17 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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