To prepare for this assignment:
• Review the information about hearing in Chapter 9, paying special attention to the structures in the middle and inner ear as well as how sound is transmitted and processed.
• Review the NIDCD Web site for more specific information about the causes and consequences of presbycusis.
• Think about the implications of having presbycusis.
The assignment: (1–2 pages)
• First, explain how normal hearing occurs. Include in your discussion the following points:
o How is sound transmitted from the environment outside the body to the inner ear? What structures are involved, and how do they transmit sound?
o What happens in the inner ear (cochlea) when sound waves are converted to neural signals? How is sound frequency (pitch) processed?
• Next, summarize the causes of presbycusis and explain how they will interfere with the normal processing of sound as outlined above.
o Discuss one source of presbycusis involving a problem with the outer/middle ear.
o Discuss one source of presbycusis involving a problem with the inner ear.
• Finally, describe what it might be like to have presbycusis. Include the following points:
o If you have normal hearing now, how would your ability to converse with others be affected?
o What activities that you now enjoy would be limited by this condition?
o How would such a condition affect your work life?
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