Recognizing Types of Loss on Audiograms
In this module we check your understanding of the basic types of hearing
loss as they appear on the audiogram. You will learn to recognize the
basic, uncomplicated forms of conductive, sensorineural and mixed hearing loss.
What are the audiometric symbols that are used for
hearing testing (assuming that we are not masking the non-test ear)?
How are these symbols placed relative to one of the frequency lines?
Can you envision where you would place these symbols if
both air and bone conduction thresholds are at
0 dB HL for the right ear, and 15 dB HL for the left ear?
What are common ways of remembering where
the symbols go, what colors are used, etc.?
Describe this audiogram. What ear was tested?
POP4 Describe this audiogram. What ear was tested?
Describe this audiogram. What ear was tested?
pop6 Describe this audiogram. What ear was tested?
Describe this audiogram. What ear was tested?
POP8 Complete this table
| Conductive Loss | Sensori- neural Loss |
Mixed Loss | |
| Air conduction thresholds(normal or loss?) | |||
| Bone conduction thresholds (normal or loss?) | |||
| Air-bone gap (significant or not significant) | |||
| Location of problem |
Is there ever a case when you might not be testing
the ear you think you are testing?
Could you ever present the sound to the right ear
and have the left ear hear it?
What is masking?
Why is it used?
POP11What are the symbols that are used to note that
masking noise was presented in the non-test ear?
This loss shows both ears on one audiogram.
What is the type of loss and extent of loss for each ear?
Again, you are looking at test results for both ears
on one audiogram, which is the most common format.
What is the
type of loss and extent of loss for each ear?
What is a “vibrotactile” threshold?
Are vibrotactile thresholds more common when
doing air-conduction or bone-conduction testing?
Are vibrotactile thresholds found more often in the
low frequencies or the high frequencies?
What if the air conduction threshold were found to be
70 dB HL, and the bone conduction threshold were
found to be 35 dB HL, but there was a “VT?” notation
by the bone conduction symbol. Would you:
a. Conclude that the loss is mixed
b. Conclude that the bone conduction
threshold
is higher than 35 dB HL and call
the loss sensorineural
c. Be unable to determine if the loss is mixed or
sensorineural.
How would you interpret this audiogram?
What does a “no-response” symbol mean,
and what do they look like?
Interpret this audiogram.
Describe the right ear’s hearing.
Give careful consideration to the left ear now,
with special note to the bone conduction score at 4k Hz.
Describe this audiogram.
Discuss testing of interoctave frequencies.
When is it needed, and has it been done correctly?
Should 3000 Hz be tested routinely?
POP23Describe this audiogram
POP24 Interpret this last audiogram.
