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International Day of Deafness: why this day, symptoms and treatment

Every last Sunday in September, coinciding with this September 26, the International Day of Deafness. A date set by the World Federation of the Deaf. Let’s see what it consists of, why this day, the symptoms and the established treatments.

This day began to be celebrated on September 28, 1958 in order to commemorate the first World Congress of the World Federation of the Deaf which took place in 1951. The main objective of this day is to give visibility to this condition, as well as the problems that derive from it and that deaf people experience every day.

What is deafness?

We are talking about a degree of hearing loss: normal hearing: there would be hearing below 20 dB, mild hearing impairment: threshold between 20 and 40 dB, average hearing impairment: hearing threshold between 40 and 70 dB, severe hearing impairment: threshold between 70 and 90 dB and deep loss: threshold greater than 90 dB.

The World Health Organization (WHO) advises that exposure to noise does not exceed 65 decibels, although in Europe the limit is above 87 decibels.


In the world there are more than 45 million people over 3 years of age suffer from some type of hearing loss.

Classification of deafness

FIAPAS, the Spanish Confederation of Families of Deaf People, makes various classifications of this. Well, according to the moment of acquisition, it distinguishes between prelingual deafness: hearing loss is present before language has developed; and Post-lingual deafness: hearing loss appears when there is already language.

Depending on the location of the injury: there is conduction or transmission: they present alterations in the transmission of sound through the outer and middle ear. Perceptual or sensorineural: they are due to injuries to the inner ear or the auditory nerve pathway. And mixed: the cause is conductive and perceptual.


There are various treatments. The Hospital Clinic de Barcelona announces, that within the non-pharmacological, we talk about the hearing aids such as hearing aids, whose function is to provide the sound with these quantitative and qualitative qualities so that it is audible. Hearing aids are recommended for mild to severe hearing loss.

There are also implantable devices, created to alleviate hearing loss and can be partially or totally implanted through surgical intervention; bone conduction implant, which are anchored to the parietal bone; and the cochlear implant, a device that performs cochlear function and transforms sound. It is usually recommended in severe or profound hearing loss.

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