Conductive vs sensorineural hearing loss (1)

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Conductive vs Sensorineural Hearing Loss

• Source - Hearing solutions

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Conductive Hearing Loss

• A conductive hearing loss happens when sounds
  cannot get through the outer and middle ear. It
  may be hard to hear soft sounds.
• The main cause of conductive hearing loss is any
  kind of blockage in the outer ear. Almost there
  are many objects blocking the ear canal which
  fails sound signals to reach the nerve center.

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Common Causes

• Foreign bodies in the external ear
• Allergies
• Otitis externa
• Tumors
• Abnormal growth of the bone near or in the middle
  ear
• Ear infections and head colds
• Perforated eardrum
• Exostosis
• An unequal pressure in the middle and the
  external ear
• Poor Eustachian tube function.

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Sensorineural Hearing Loss
Sensorineural hearing loss is a type of hearing
loss in which the root cause lies in the inner
ear or sensory organ. It is also called Nerve
Deafness.It results from damaging of nerve or
inner ear. Usually, it occurs in the cochlea or
anywhere leading to the brain.If the sensory
cells are destroyed in the cochlea then sound
waves cant reach to the brain.
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Common Causes

• Genetics
• Loud Noise
• Ageing
• Head trauma
• Menieres Disease
• Disease and Infections
• Tumors
• Medication
• Otosclerosis

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Conductive vs Sensorineural Hearing Loss
Differences
Conductive Hearing loss
Sensorineural Hearing loss
Short Duration hearing loss It can be treated Usually mild and moderate hearing deficiency Rinne test is negative Any kind of blockage in outer ear preventing conduction of sound into the inner ear. Absolute bone conduction is normal Permanent hearing loss Cannot be treated by managed by hearing aids. Absence or damage of sensory hair cells in the middle ear Rinne test is positive Can be mild, moderate, profound and severe. Absolute bone conduction
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The measurement of Hearing deficiency
20-50 dB reduction at 4000 Hz Mild Clear sound with slight noise in the background
51-70 dB reduction at 4000 Hz Moderate Low-frequency sound with increased background noise
71-90 dB reduction at 4000 Hz Severe The Hearing is hard with low sound and loud noise
90 dB reduction at 4000 Hz Profound Murmuring sound with louder noise. Hearing is harder
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