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Mild sensorineural hearing loss in left ear with tinnitus,what does it mean when you have ringing in your left ear itching,jewellery stand for long necklaces vintage - For Begninners

Author: admin | 16.02.2014 | Category: Tinnitus Hearing Loss

An audiogram shows the softest sounds a person can hear at different frequencies (pitches).
The frequencies displayed on the horizontal axis of the audiogram are those most crucial to hearing and understanding conversation, with low frequencies on the left and higher frequencies on the right. Information on audiograms is encoded using symbols, each of which represents a different test condition. Audiologists present stimuli via bone and air conduction to determine the type of hearing loss.
When the outer or middle ear is blocked or damaged, bone conduction thresholds will be better than air conduction hearing levels.
Sensorineural hearing loss occurs when there is damage to the cochlea or to the auditory nerve pathways.
Test method and desired patient response is determined by patient age and developmental level. As children approach age 2 ? years, VRA is no longer effective because it cannot hold the child’s interest for the duration of the test.
Preschool: At 2 ? years of age, most children learn games used in conditioned play audiometry (CPA). School-aged Children: At around age 4 years, children are ready to respond in a more adult-like manner known as a voluntary response. Normal young, healthy human ears can actually hear frequencies as low as 20Hz and as high as 20,000Hz.
Bone conduction thresholds are marked on the audiogram as P (better ear), [(right ear) or] (left ear). If the hearing thresholds obtained by bone conduction are the same as the air conduction thresholds, this indicates that there is nothing stopping the sound from traveling through the outer or middle ear to the cochlea. If the bone conduction hearing thresholds are normal, but there is a loss of hearing for air conduction sounds, this is called a conductive hearing loss.
Conductive hearing losses occur when the "outer" or "middle" portions of the ear fail to work properly.

The hearing threshold is determined to be the lowest intensity (dBHL) at which multiple presentations of a frequency specific tone were detected 50% of the time. For example, the sound “sss” presents at a high frequency, while an “ooo” presents at a lower frequency.
Air conduction testing involves the use of headphones, insert earphones, or speakers to deliver sounds to the ear canal through the middle ear and into the inner ear. Conductive hearing loss is defined as air conduction thresholds greater than 15 dB (outside the normal range) with bone conduction thresholds within the normal range.
Consistent, reliable behavioral threshold testing is possible with children as young as 6 months developmental age. However, we test hearing in the range 250Hz to 8000Hz, as most of the sounds of speech occur in this frequency range. It indicates how much hearing varies from normal and, if there is a hearing loss, where the problem might be located in the hearing pathway.
This means that the cochlea is normal, but there is some blockage to sound in the middle or outer ears. Middle ear conditions caused by Otitis Media can be corrected by medical or surgical treatment. The white area represents the sounds that the person would not hear (softer then their thresholds) and the tan area indicates all of the sounds that the person would be able to hear (louder then their thresholds). The shaded region on the audiogram shows the range where most conversational speech occurs. In general, a red “O” is used to represent the right ear while a blue “X” represents the left ear.
To the right is an audiogram of an individual with conductive hearing loss in the left ear.
Traditionally, the test setting involves the child and the audiologist sitting at a small table in a sound booth. For example, 250 Hertz (250Hz) sounds like middle C on the piano, while the high pitched ringing of the telephone is about 3000Hz.

Conversational voice level is around 65 decibels, and 120 decibels (120dB) is very, very loud – about as loud as a jet taking off if you are standing 25 metres away!
In bone conduction testing a bone oscillator is placed behind the ear on the mastoid bone to deliver sounds directly to the inner ear by vibration, bypassing the outer and middle ear.
Notice that air conduction results show a moderate hearing loss while bone conduction results show that the cochlea and sensorineural pathway are responding within the range of normal hearing sensitivity.
The child is trained to respond to a stimulus by performing a task such as putting block in a bucket or a peg in a board.
Common causes of conductive hearing loss are fluid build up in the middle ear or wax blockage in the ear canal.
Normal hearing is defined as having threshold at an intensity greater than or equal to 15dB HL.
Comparing air conduction and bone conduction thresholds helps determine whether a hearing loss is classified conductive, sensorineural, or mixed. In a sound-treated room, an audiologist can quickly train a child to look towards something interesting like a puppet or video when a sound is heard (i.e.
Children are more likely to have a conductive hearing loss than a sensorineural hearing loss. In cases where a child will not or cannot wear earphones for ear-specific threshold testing, sounds may be presented via speakers (in the “soundfield”).
This technique enables audiologists to draw general conclusions about a child’s hearing but does not give any ear-specific information.
Arrows connected to audiogram symbols indicate a no response value, indicating that at the specified frequency no response was detected.
The Guidelines for Audiometric Symbols can be found on the website of the American Speech-Language-Hearing Association (ASHA).

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