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Understanding Human Hearing and the Anatomy of the Ear

Human hearing is a complex process involving different parts of the ear, each playing a crucial role in sound perception. The audible range for humans extends from 20 Hz to 20 kHz, with sensitivity highest between 1 kHz and 5.5 kHz. The outer ear collects sound, channeling it to the middle ear, which consists of the eardrum and three small bones (hammer, anvil, stirrup) that amplify sound vibrations. The inner ear transforms these vibrations into electrical signals via the cochlea, which are then sent to the brain through the auditory nerve. Understanding this process can help identify common ear infections and their impact on hearing.

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Understanding Human Hearing and the Anatomy of the Ear

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  1. Human Hearing

  2. The Human Ear

  3. Some highlights: Frequency range • The audible human hearing range is from 20 Hz to 20 kHz • Most people can comfortably hear between 1000Hz to 5500 Hz

  4. The Outer Ear • The outer ear gathers sound and channels it into the auditory canal toward the middle ear

  5. The Middle Ear • The middle ear consists of the eardrum and three small bones: the hammer, anvil and the stirrup • The eardrum vibrates when it encounters sound waves • The bones transmit and magnify the vibrations

  6. Middle Ear

  7. The Inner Ear • The inner ear contains the cochlea and the auditory nerve • Vibrations are transformed into electrical impulses in the cochlea • The cochlea sends the impulses through the auditory nerve to the brain

  8. Inner Ear

  9. Infection in the Middle Ear and location of the ear components

  10. DID YOU HEAR THAT????

  11. Your Turn…. • MHR Read pg. 408-416 • Do pg. 416# 1-15

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