Types of Hearing Loss |
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Conductive |
Cochlear functions correctly, but something is blocking the sound from getting there |
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Mixed |
Loss is part conductive, part sensorineural |
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Sensorineural |
Cochlea is not functioning correctly |
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Microtia/Atresia |
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Aural Atresia |
Missing ear canal |
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BMA |
Bilateral Microtia and Atresia (i.e. both sides) |
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Canal Stenosis |
Incomplete atresia, narrow ear canal |
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LMA |
Left microtia and atresia (ie. unilateral on left side) |
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Microtia |
Missing or deformed outer ear |
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RMA |
Right microtia and atresia (ie. unilateral on right side) |
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Stapes Fixation / Malformation |
Congenital malformation or fusion of the stapes (one of the three bones of the middle ear) |
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UMA |
Unilateral microtia and atresia |
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Medical Tests |
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ABR |
Auditory Brainstem Response (same as BAER) |
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Audiogram |
Hearing Test |
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BAER |
Brainstem Auditory Evoked Response (same as ABR) |
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CT Scan |
Computerized Tomography Scan |
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HINT |
Hearing In Noise Test |
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NBHS |
Newborn Hearing Screening |
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MRI |
Magnetic Resonance Imaging |
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Tympanogram |
Test of pressure on ear drum |
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Audiogram Abbreviations |
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AC |
Air Conduction |
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BC |
Bone Conduction |
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CNT |
Could Not Test |
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Cookie Bite |
A loss that is exclusively (or worse) in the speech frequencies, the audiogram picture looks like a cookie with a bite taken out of it, hence the ter, |
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dB |
Decibel, measure of hearing (logorythmic) |
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DNT |
Did Not Test |
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Hz |
Herz, a measurement of the frequency of the sound being tested |
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KHz |
Kilo Herz 4000 Hz == 4KHz |
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Mild Hearing Loss |
21-40 dB in children, 26-40 dB in adults |
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Moderate Hearing loss |
41-60 dB |
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Normal Hearing |
anything under 20 dB in children, 25 dB in adults |
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Profound Hearing Loss |
81 dB or higher |
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PTA |
Pure Tone Average, the average of the 3 speech frequencies where the person reliably responds to tones |
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Severe Hearing Loss |
61-80 dB |
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SLT |
Speech Language Threshhold |
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SNHL |
Sensineural Hearing Loss |
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Speech Frequencies |
1K to 4K Hz |
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SRT |
Speech Reception Threshhold (SLT and SRT are pretty much interchangeable) |
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WNL |
Within Normal Limits |
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Devices |
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BAHA |
Bone Anchored Hearing Appliance |
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BCHA |
Bone Conduction Hearing Aid |
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HA |
Hearing Aid |
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FM System |
Uses FM radio signal to send sound from person wearing microphone directly to hearing impaired individual |
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Sound Field System |
Like FM, but uses "boom box" or amplifiers rather than headphones or hearing aids |
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Surgeries |
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Atresia Repair |
Creation of an ear canal |
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Medpor Microtia Repair |
Creation of an outer ear using a piece of high tech plastic |
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PORP |
Partial Ossicular Replacement Prosthesis |
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Rib Graft Microtia Repair |
Creation of an outer ear using a rib |
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Stapedotomy |
Removal of stapes bone |
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TORP |
Total Ossicular Replacement Prosthesis |
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Tympanostomy |
ear "tubes" (sometimes called PE [Pressure Equalization] tubes) |
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VORP |
Vibrating Ossicular Replacement Prosthesis |
