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Physiology Of Hearing

  • Sound waves collected by the outer ear travel along the ear canal to the Eardrum
  • The Sound waves hit the eardrum and cause vibrations which are transmitted via 3 small bone in the middle ear to the inner ear
  • Inside the inner ear is the cochlea and semicircular canals (responsible only for the balance system)
  • There are receptor hair cells & fluid inside the cochlea. The vibrations from the middle ear cause the fluid to move which in turn moves the receptor hair cells causing nerve impulses that the brain decodes as sound

Hearing loss can be of three types:

  • Conductive Hearing Loss: Disorder of the outer and / or middle ear which results in difficulty in hearing. This is commonly treated medically or through ear surgery
  • Sensorineural Hearing Loss(Commonly called nerve deafness): Disorder of the inner ear and / or auditory nerve. Such hearing loss is irreversible. Tremendous advances in hearing instrument technology enable most patients to be significantly rehabilitated
  • Mixed hearing loss: Contains elements of both Conductive & Sensorineural hearing loss

Hearing loss can happen at any age and can be due to:

  • Natural Ageing Process
  • Exposure to loud or constant noise
  • Illness or complications at birth
  • Heredity / congential
  • Toxic medication
  • Ear Infection
  • Tumour
  • Trauma
  •  Injury

Sensorineural Hearing loss may occur due to:

  • Ageing
  • Alcohol
  • Stress
  • Constant noise at work
  • Loud music, rock concerts, radio headphones
  • Hobbies like shooting
  • Ototoxic medication
  • Degeneration of the nerves leading from the inner ear to the brain

Hearing Loss May result in:

  • Misunderstanding conversation, missing the punch line of jokes
  • Loss of confidence
  • Avoiding group meetings, social occasions or family gatherings where listening may be difficult
  • Asking others to repeat themselves
  • Difficulty hearing T.V / Radio (Need to increase volume) and telephone
  • Difficulty hearing in public gatherings, concert halls – distant sound sources
  • Difficulty in understanding in noisy situations

Over a period of time, the science and technology is improved in finding solution for hearing loss and to its causes, as a result the below listed devices are introduced which can provide us the best results against hearing loss difficulties.

The devices are classified into five types:

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Malleshwaram Branch    # 17, 4th Main Road,
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