noun
EXAMPLES FROM CORPUS
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The most bothersome and fatiguing noise, these low-pitched hums, are usually from 30 to 1, 500 hertz .
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The most powerful vibrations from a quake range from 0.5 hertz to about 5 hertz.
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The variation is tiny: just one hertz in a billion.
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To get to 40 hertz and beyond requires a subwoofer.