Waves: Sound
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Last updated 12:02 PM on 4/1/26
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7 Terms
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Human hearing range
Frequencies between 20 Hz and 20,000 Hz
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Ultrasound
Sound waves with frequencies above 20,000 Hz
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Infrasound
Sound waves with frequencies below 20 Hz
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Sound in a vacuum
Sound cannot travel in a vacuum as there are no particles to vibrate
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Uses of ultrasound
Breaking kidney stones, cleaning jewelry, and scanning for unborn babies
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Oscilloscope function
Displays longitudinal sound waves as transverse waves on a screen
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Oscilloscope time-base
Controls the speed at which the dot moves across the screen (time axis scale)
