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GRADE 11 PHYSICS:
HOW THE EAR WORKS
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1. Go to aekoivu.tripod.com and click on this link in the "recent updates" section: Website Link: How the Ear Works.


Alternatively, you can go directly to the assignment using this link:


(http://www.ndt-ed.org/EducationResources/HighSchool/Sound/humanear.htm)

2.Answer the following questions:

A.Write down the function of each of the parts of the ear shown in the diagram.   In your answer, be sure you carefully trace the path of the sound wave and then the vibration as it makes its way through the various parts.

ear flap_____________________________________________

ear drum_____________________________________________

ear canal_____________________________________________

hammer_____________________________________________

anvil_____________________________________________

stirrup_____________________________________________

cochlea_____________________________________________

auditory nerve_____________________________________________

Eustachian tube_____________________________________________

B. What is a fundamental frequency, harmonic and overtone?_____________________________________________ _____________________________________________ _____________________________________________



C. What is the difference between intensity, pitch and tone? _____________________________________________ _____________________________________________ _____________________________________________



D. What is the difference between music and noise? _____________________________________________ _____________________________________________ _____________________________________________





E. Skip forward a couple of pages on the website to The Doppler Effect.   Observe the animation provided on this page.   If an object is making a noise
as it drives along (such as a police car with siren), briefly explain WHY the pitch frequency) is higher as it
(approaches a stopped listener, and the pitch is lower as it moves away from a stopped listener.

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