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HEARING - Coggle Diagram

- - - - Nerve deafness
    - - Caused by damage to the mechanical system that conducts sound waves to cochlea
    - - Stimulating the auditory nerve through electrodes threaded into the cochlea
  - - - Loud sound can activate hair cells but hair cells easily lost their sensitivity after listen to loud sound for too long
    - - Place theory
        
        Different pitches = Different sound waves trigger activity
      - Georg von Bekesy research
        
        High frequency produced large vibrations near the beginning of the cochleach's membrane
        
        Low frequency vibrate more of the membrane including near the end
      - Frequency theory
        
        The brain reads pitch by monitoring the frequency of neural impulses traveling up the auditory nerve
      - The volley principle
        
        Neural cells can alternate firing. By that, they can achieve a combined frequency above 1000 waves per second