helps students learn how audio and visual cues can help communication, how loudness is measured, how changes in the "hearing pathway" may affect hearing, and how to prevent hearing loss. Animations (under "student activities") show an ear hearing the Gettysburg Address in 5 languages, a graphic display of pitch and volume, and how sounds are converted into electrical impulses and sent to the brain. (National Institutes of Health)
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Source: U.S. Department of Education