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Lecture 3a - Lecture 3 A Children with hearing impairments...

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Lecture 3. A) Children with hearing impairments – Introduction - In North America, we pay less attention to hearing loss than to almost any other medical condition - Affects development of speech and language (the most important components of interpersonal communication) - For children, hearing impairments pose a serious threat because hearing is imperative for learning The human ear - Impairments are caused by interference with any part of the ear’s transmission system - Impairment takes many forms o Restriction of frequencies received o Distortions along the frequency spectrum o Failure to perceive sounds - External ear o Visible cartilage part o Referred to as pinna o Least complex and least important part of ear o Consists of the external canal and runs from the pinna to the eardrum o Tympanic membrane (eardrum): a tough, tightly stretched tissue that separates the outer from the middle ear o Pinna collects sound waves and filters them into the meatus o Eardrum is concave and vibrates freely when struck by sound waves
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Lecture 3a - Lecture 3 A Children with hearing impairments...

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