Types of hearing loss

Types of hearing loss 150 150 Tony Guo

Types of hearing loss

  • Conductive hearing loss 
    • Sound transmission to inner ear impaired
      • Patients actually hear better in noisy environments
      • Patient often speaks softly
      • Identify and treat cause
      • Suggest hearing aid
    • Caused by 
      • Otitis media with effusion
      • Impacted cerumen
      • Perforation of TM
      • Otosclerosis
      • Narrowing of the external auditory canal
  • Sensorineural hearing loss  
    • Results in ability to hear sound but  inability to understand speech
      • Can lead to misunderstanding by others 
      • Hearing aids make sounds louder but not clearer
    • Caused by
      • Impairment of the inner ear
      • Vestibulocochlear nerve (CN VIII) damage
      • Congenital and hereditary factors
      • Noise trauma
      • Aging (presbycusis)
      • Meniere’s disease
    • Ototoxic drugs
      • Aspirin
      • NSAIDs
      • Antibiotics
      • Loop diuretics
      • Chemotherapy drugs
  • Mixed hearing loss
    • Central and functional hearing loss
      • Deafness in other family members often present
      • Can be psychologically or emotionally related
  • Sudden hearing loss
    • Sudden deafness
      • Unexplained, rapid loss of hearing
      • Usually affects just one ear
      • Medical emergency
  • Tinnitus
    • Perception of noise without an actual source of sound
    • “Ringing in the ears”
    • May be first symptom of hearing loss
      • Most commonly caused by noise
      • More than 200 drugs cause tinnitus

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