Summary
The average human can detect sound in the range of 20Hz to 20kHz, and the ear is most sensitive to frequencies around 1,000-3,500 Hz.
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As we age, our hearing range typically decreases and most people can only hear sounds up to 15-17 kHz.
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Sensitivity to sound also varies with frequency.
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Routine investigation for hearing loss usually involves an audiogram which shows threshold levels relative to a normal.
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According to
