INCLUSIVE EDUCATION

                                     HEARING  IMPAIRMENT

 

 

          

You already know that hearing is one of the five senses that allows  us to perceive sound Hearing impairment, or hearing loss, occurs when you lose part or all of your ability to  hear .Other terms that are used to refer to hearing impairment are deaf and hard of hearing.

      Hearing impairment are classified in terms of the severity and type of hearing impairment. The severity of the hearing impairment is categorized based on the minimum sound that can be heard with your better ear. The higher the decibel(db), the louder the sound.            

              

       With mild hearing impairment, the minimum sound that can be heard is between 25 and 40 dB. People at this level cannot hear soft noice and may have trouble following conversations in noisy settings.

      With moderate hearing impairment, the minimum sound that can be heard is between 40 and  70dB. People at this level cannot hear soft or moderately loud noises and may have trouble hearing unless they use a hearing aid.

    With severe hearing impairment , the minimum sound that can be heard is between 70 and 95 dB. People at this level are unable to hear most noises and may rely on lip reading and/ or sign language, even with the use of a hearing aid.

 With profound hearing impairment, the minimum sound heard is 95dB and over.People at this level may only hear very loud noises and rely solely on lip reading and/or sign language. Hearing aids are not effective.

 

                                                               

                                        Types of Hearing Impairment 

 

       Conductive hearing loss is when a hearing impairment is due to problems in the outer ear, middle ear, ear canal,ear drum,or the Ossicles,which are the tiny bones in the middle ear.

      Sensorineural hearing loss (SNHL), also referred to as  nerve hearing loss, occurs when there is damage to either the auditory nerve or the  Cochlea, which is the inner ear.

 

 

       When conductive hearing loss and SNHL occur at the same time, it is reffered to as Mixed hearing loss. Mixed hearing loss occurs when there is both damage to the outer or middle ear and damage to the inner ear.






 

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