NEAL GRUNDY / SCIENCE PHOTO LIBRARY NEAL GRUNDY / SCIENCE PHOTO LIBRARY
Hearing. Conceptual image showing sound waves and a woman's ear. This represents the sound waves that are heard when listening to sounds with the ears. The human ear can hear sounds in a frequency range of 20 Hertz to 20,000 Hertz, and sound levels from 0 to 130 decibels.
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