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Signs & Symptoms of Hearing Loss

Signs & Symptoms
of Hearing Loss

Signs & Symptoms of Hearing Loss

Depending on what part of the auditory chain is impaired, signs and symptoms differ greatly.

Conductive Hearing Loss affects signal intensity. Sounds are perceived less loud but clear as sounds or mechanical energy are not accurately conveyed to the liquid in the cochlea.

Causes include the effects of various infections and/or genetic/hereditary malformations, but may also be caused by accidents and traumas especially to the eardrum or middle ear structures or tissue hardening and abnormal and bone growth.

Sensory Hearing Loss affects loudness and clarity. Sounds are perceived less loud, less clear and distorted. The mechanical energy is not accurately and completely converted into electrical impulses in the cochlea mostly due to missing or malfunctioning hair cells and/or not conducted completely or accurately via the cochlea nerve to the brain.

Causes include the effects of various infections and/or genetic/hereditary malformations but may also be caused by prolonged unprotected exposure to loud sounds.

It is the most common form of hearing loss, and describes a combination of Sensory and Central hearing loss. Causes include genetic/hereditary causes but in the elderly it is mostly cause by auditory deprivation. Cochlea sends less signal to the brain and overtime due to reduce demand, forgets how to use the signal resulting in slower processing and in some cases brain shrinkage has even been reported.


Central (Neural) Hearing Loss

Central Hearing Loss affects clearness and speech discrimination. Sounds are perceived distorted and speech intelligibility is impaired. No effect on loudness.

Causes include genetic/hereditary effects but most often is the result of auditory deprivation. The brain is unable to decode the signal it receives, cannot or not fast enough decoded or can’t find appropriate matching images in memory or cant store/access such auditory pictures, or as the case in children has never received input and hence not built up an auditory picture memory.

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