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Health Science and Medical Technology

Activity Originally Created By: Mike Morris

How we hear: the ear, bones and brain.

Part of Lesson Plan: Hearing Tests Using Tuning Forks **

Activity Overview / Details

Sound comes into the ear through the air at a speed of 768 mph. It is measured in Decibels (dB).  A whisper is about 30 dB, an alarm clock is 80 dB.

Hearing loss could be due to a block in the external ear such as too much ear-wax or something stuck in there, or swelling from external otitis (swimmers ear) ,

Conductive hearing loss in the middle ear, could be caused by  fluid,  otitis media or other infection or a perforated ear drum.

Sensorineural hearing loss  is damage to the  the inner ear bones or nerves.  It could be caused by  congenital defects or damage from loud noise or infections.