balance. The vestibular apparatus contains semicircular canals which in turn balance you. Any movement by the head, and this apparatus
The ear in humans consist three parts: The outer, the middle, and the inner portions. The outer ear, or pinna, is the structure that we
call the ear. It is the skin covered flap of elastic cartilage, that sticks out from the side of the head. It acts like a funnel catching sound
and sending it to the middle portion of the ear. The middle portion contains the ear drum and the connection between the pharynx and
the drum, the Eustachian tube. The inner ear contains the sensory receptors for hearing which are enclosed in a fluid filled chamber
30 and 20,000 waves or cycles per second. High pitch sounds produce more of a trebly sound, while low pitch sounds produce a rumbling
trauma, or an inherited disorder. Those causes can be classified as conductive, sensorineural, or both.
A conductive hearing loss results from damage to those parts of the ear which transmit sound vibrations in the air to the fluids of the
the cochlea. They cannot perform such an action if the eardrum is perforated, if the middle ear cavity is filled with fluid, or if the bones
become separated, are destroyed by disease, or are overgrown by a spongy bone ( a disorder called otosclerosis). In conductive hearing
loss, sound intensity is reduced, but sound isn?t distorted.
which is located in the cochlea. Sensorineural hearing loss has to do with both distortion of sound and loss of sound intensity. The
closer the damaged tissue is to the auditory cortex, the more complex and subtle are the types of distortions. The hair cells of the organ
of Corti cannot grow once they are damaged. Sensorineural hearing loss is rarely reversible.
The hearing losses caused by salicylates such as asprin and the early stages of Meniere?s Disease are reversible, however. The latter
Hearing loss is usually measured by an instrument called an audiometer which measures the weakest intensity at which a person can
at each frequency, according to an international standard. Audiometry can determine the amount of hearing loss-whether it is conductive
or sensorineural in nature, and how much of each type of damage has occurred.
blind, deaf, and mentally retarded in nearly every state in the US.
and dining halls that enroll children on a 24 hour a day basis. These schools are designed to serve children who do not have access to
normal services or whose handicap makes it difficult to for them to adapt to a regular school. Residential schools are the most common
although occasionally there may be a school in a hospital.
Hearing devices are also available. Hearing Aids operate on battery. They amplify the sound waves that the ear would normally
receive. They range from $500 to $6000.
Answer: I was born with a hearing disability
Q: When we talk, what exactly do you hear?
A: The sound volume is lower but no distortion
Q: Would you consider yourself hard on hearing?
sometimes, I can see their lips moving which signals me to listen closely.
Q: Did you ever go for any treatment?
A: No, I didn?t feel that it was necessary since it was just a matter of paying attention.
Q: Do you wear any hearing devices?
Q: Do you know what your overall score was on an audiometer?
A: No, I was never tested