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Science & Technology General Knowledge Quiz
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The whistle used to train dog is not audible to human ear.
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A
because they are ultra-sonic whistle specially made for dog
💡 Explanation:
Dog whistles produce ultrasonic sounds (above 20 kHz) which are beyond the range of human hearing but within dogs' hearing range. Dogs can hear frequencies up to about 45-65 kHz, much higher than humans. Infrasound (below 20 Hz) would not be useful for dog training as dogs also have limited sensitivity there.