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  • Pallavaram + 91 9940068405, Velachery + 91 99622 67333, Purasawalkam + 91 91767 19494 , Urapakkam +91-77086 70353, Porur +91-7550028064, W-Tambaram +91-91767 78660

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Quick-Knowledge

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Quick-Knowledge

Parts of the Ear

  • Outer Ear
  • Middle Ear
  • Inner Ear

Outer Ear consists of

  • Pinna/Auricle
  • Ear Canal/Auditory Canal

Middle Ear consists of

  • Eardrum
  • Tympanic Cavity
  • Ossicles (malleus, incus, stapes)

Inner Ear consists of

  • Oval window
  • Semicircular ducts
  • Cochlea
  • Auditory Tube

Image - Anatomy of the Ear

Types of Hearing Loss

  • Conductive Hearing Loss
  • Sensorineural Hearing Loss
  • Mixed Hearing Loss

Causes for Conductive hearing loss

  • Deformation of outer ear, ear canal, or middle ear structures
  • Fluid in middle ear due to cold

conductive-hearing-loss-2

  • Ear infection
  • Allergies
  • Poor Eustachian tube function
  • Perforated eardrum
  • Benign tumors
  • Impacted earwax
  • Infection in the ear canal
  • Foreign body in the ear
  • Otosclerosis

Causes for Sensorineural hearing loss

  • Exposure to loud noise
  • Deformation of the inner ear
  • Head trauma
  • Virus or disease
  • Autoimmune inner ear disease
  • Hearing loss that runs in the family
  • Aging (presbycusis)
  • Meniere’s Disease
  • Tumors
  • Otosclerosis

Sensorineural-Hearing-Loss-676x381

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Degree of Hearing Loss

  • Normal – (-) 10 dB to 15dB
  • Slight             – 16dB to 25dB
  • Mild             – 26dB to 40dB
  • Moderate             – 41dB to 55dB
  • Moderately Severe – 56dB to 70dB
  • Severe             – 71dB to 90dB
  • Profound             – 91+dB

Causes for Sensorineural hearing loss

  • Exposure to loud noise
  • Deformation of the inner ear
  • Head trauma
  • Virus or disease
  • Autoimmune inner ear disease
  • Hearing loss that runs in the family
  • Aging (presbycusis)
  • Meniere’s Disease
  • Tumors
  • Otosclerosis

audbinillust

Child Hearing Test

Types of Hearing Tests

  • Pure Tone Audiometry
  • Speech Testing
  • Middle Ear Analysis
  • Auditory Brainstem Response
  • Oto-acoustic Emission

Steps in Audiologic (hearing) Evaluation:

  • To check whether there is hearing loss
  • To analyze the cause of hearing loss
  • To determine the degree & config. Of hearing loss
  • To provide best treatment options

Types of Hearing Aid

  • Analog
  • Digital

Different Styles of Hearing Aid

  • IIC – Invisible In Canal
  • CIC – Completely In Canal
  • ITC – In The Canal
  • ITE – In The Ear
  • BTE – Behind The Ear
  • RIE – Receiver In the Ear
  • Pocket Models

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