Audiogram Symbols
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32 Terms
Right Ear AC unmasked: Earphones
What does this symbol stand for?
Right Ear AC masked: Earphones
What does this symbol stand for?
Right Ear BC unmasked: Mastoid
What does this symbol stand for?
Right Ear BC masked: Mastoid
What does this symbol stand for?
Right Ear No response
What does this symbol stand for?
Left Ear AC Unmasked: Earphones
What does this symbol stand for?
Left Ear AC Masked: Earphones
What does this symbol stand for?
Left Ear BC Unmasked: Mastoid
What does this symbol stand for?
Left Ear BC Masked: Mastoid
What does this symbol stand for?
Left Ear No Response
What does this symbol stand for?
What is this symbol
Right Ear Masked: Forehead
What is this symbol?
Left Ear Masked: Forehead
A bone conduction oscillator placed on the right mastoid could result in the tone being heard in
both ears (or either ear)
A hearing loss by bone conduction with even greater hearing loss by air conduction signifies
mixed hearing loss
An audiogram indicating a sensorineural hearing loss will show
impaired air and bone conduction with no air-bone gap
When you test using the BONE CONDUCTION pathway, you are testing the
inner ear, auditory nerve
The air conduction pathway includes
the outer ear, middle ear, inner ear, and auditory nerve
Conductive hearing loss originates from disorders in the
outer ear and middle ear
A false negative response in pure-tone audiometry is
when a patient fails to indicate that they have heard the tone
In the presence of a unilateral conductive hearing loss, the Weber test will result in
lateralization to the poorer ear (the one with a conductive hearing loss)
Air conduction thresholds reveal
the degree of hearing loss
Severe sensorineural hearing losses may be misdiagnosed as mixed losses when the bone-conduction responses are
tactile responses
Calculate the three-frequency pure tone average for the following thresholds from a client: 250 Hz = 25, 500 Hz = 25, 1000 Hz = 20, 2000 Hz = 15, 4000 Hz = 40, 8000 Hz = 45
20 hz
Traditionally, pure-tone thresholds are obtained by decreasing the intensity of the signal in ______ dB steps and increasing it in ______ dB steps.
10,5
An audiometric threshold is defined as the softest intensity a person can hear 100% of the time.
false
Most conductive hearing losses are temporary and can be resolved medically.
true
Bone conduction testing is routinely performed at the frequencies 250-8000 Hz.
false
What frequencies are bone conduction routineley performed at
500 hz - 4,000 hz
A false positive response in pure tone audiometry is when a patient signals that they have heard a tone when no signal was presented.
True
Air conduction thresholds reveal the type of hearing loss.
false
When performing pure tone audiometry you should begin by testing the better ear first.
True
Which ear should be tested first during a hearing evaluation?
the better hearing ear. If there is no better ear, start with the right ear