Anglais example sentences with "ultrasonic"

Scientists at the Oak Ridge National Laboratory have invented an ultrasonic dryer that can dry clothes without heating them.
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A group of scientists at Bristol University, led by senior lecturer Anthony Croxford, discovered that sending hundreds of different ultrasonic waves into a structure, and then listening and analyzing their echoes can be used to detect the tiniest cracks.
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Bats can hear at among the highest frequencies of any mammal, up to 120,000 Hz. They use ultrasonic vocalizations as sonar, allowing them to pursue tiny insects in the dark without bumping into objects.
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When your dog tilts his head to listen to seemingly imaginary sounds, he is tuning in to ultrasonic frequencies, as high as 45,000 Hz.
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