By: Anastasiya Romanchukevych

Identify the parts of the human ear and explain how each part contributes to how humans hear.

EAR STRUCTURE

Identify and explain the different types of hearing loss. Explain how hearing aids work.

Conductive Hearing Loss

Conductive hearing loss occurs when sound is not conducted efficiently through the outer ear canal to the eardrum and the tiny bones of the middle ear. Conductive hearing loss usually involves a reduction in sound level or the ability to hear faint sounds. This type of hearing loss can often be corrected medically or surgically.

Possible causesFluid in the middle ear from colds Ear infectionAllergiesPerforated eardrum Benign tumors Impacted earwaxInfection in the ear canal

Sensorineural Hearing Loss SNHL occurs when there is damage to the

inner ear (cochlea), or to the nerve pathways from the inner ear to the brain. Most of the time, SNHL cannot be medically or surgically corrected. This is the most common type of permanent hearing loss.

Possible causesIllnessesDrugs that are toxic to hearingHearing loss that runs in the family (genetic

or hereditary)AgingHead traumaMalformation of the inner earExposure to loud noise

Sometimes a conductive hearing loss occurs in combination with a Sensorineual hearing loss (SNHL). In other words, there may be damage in the outer or middle ear and in the inner ear (cochlea) or auditory nerve. When this occurs, the hearing loss is referred to as a mixed hearing loss.

Identify possible causes of Beethoven becoming deaf based on current medical research.

He was not always deaf but he started going deaf in his late 20s. At this stage, the deafness began to be manifested in the constant ringing in his ears (tinnitus) which eventually became "intolerable", in Beethoven's own words. All the music of his late period was composed when he was totally deaf, which is incredible.

There are also various theories circulating today regarding Beethoven’s health and hearing loss. It has been suggested that Beethoven was suffering from Syphilis or that he was poisoned.

???What is coonductive hearing loss?Name tree possible causes.

???What is sensorineural hearing loss?Name tree possible causes.

???How did Beethoven become deaf?