Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
68 Cards in this Set
- Front
- Back
What is an audiogram?
|
graphic display of hearing test results
|
|
What is amplitude(intensity)?
|
distance from the baseline to the point of maximum displacement on the wave
-measured in dB |
|
What term does this definition represent: ratio between sound and reference SP?
|
dB logarithmic measure
|
|
What is a threshold?
|
levels at which an individual barely hears a sound for a variety of frequencies
|
|
On an audiogram, the decibel range is...
|
-10 to 120 dB HL
|
|
What dB does the audiometer represent threshold at?
|
0dB HL regardless of hertz; which represents different levels of sound pressure
|
|
What dB HL is conversational speech at?
|
50 dB HL
|
|
What is the pathway of sound in air conduction?
|
Sound enters the outer ear, middle ear, and inner ear
|
|
Most common problems that affect hearing by air conduction are...
|
otitis media, cerumen, noise trauma
|
|
What is the pathway of sound in bone conduction?
|
Sound does not travel through outer ear or middle ear
-goes directly to inner ear |
|
What is a common problem that can affect bone conduction?
|
noise trauma
|
|
Why do audiologists compare results of air and bone conduction testing?
|
to determine whether the loss is in the outer/middle ear system or in the inner ear system
|
|
What are the two symbols used in air conduction to represent the right and left ear?
|
red circle and a blue cross
|
|
What is the sensation level?
|
signal relative to client's own threshold
|
|
If a client has a threshold of 15 dB and the input signal is 50 dB, what is the sensation level?
|
35 dB SL
|
|
If an adult has 41-55dB HL, what degree of hearing loss is this?
|
Moderate hearing loss
|
|
If an adult has 26-40 db HL, what degree of hearing loss is this?
|
mild hearing loss
|
|
If an adult has 90+ db HL, what degree of hearing loss is this?
|
profound hearing loss
|
|
If an adult has 71-90 dB HL, what degree of hearing loss is this?
|
severe hearing loss
|
|
If an adult has 56-70 dB HL, what degree of hearing loss is this?
|
moderately severe hearing loss
|
|
If an adult has -10 to 25 dB HL, what degree of hearing loss is this?
|
normal
|
|
If a child has 16 to 25 dB HL, what degree of hearing loss is this?
|
slight
|
|
What dB is considered normal for a child?
|
-10 to 15 dB HL
|
|
What symbols are used for bone conduction results?
|
Carats
> for left < for right |
|
What are the three types of hearing losses?
|
1. conductive
2. sensorineural 3. mixed |
|
Adults have slight hearing loss...true or false?
|
False...only children have slight hearing loss
|
|
In a conductive hearing loss, the audiogram shows these results regarding AC, BC, and air bone gap...
|
abnormal AC
normal BC air bone gap |
|
What is an air bone gap?
|
difference,in decibels, between thresholds obtained by air conduction and thresholds obtained by bone conduction at a particular frequency in an ear
|
|
What part of the ear is the conductive hearing loss?
|
outer and middle ear
|
|
What is the management of a conductive hearing loss?
|
medical attention or otological management
|
|
What kind of results do you see on an audiogram showing a sensorineural hearing loss?
|
abnormal AC
abnormal BC no air bone gap |
|
If the air bone gap is over 10 dB, is it significant?
|
Yes, if it equals 10 or is less than 10 then it is not significant
|
|
What type of management is considered for SNHL?
|
amplification or aural rehabilitation
|
|
What kind of results do you see on an audiogram showing a mixed hearing loss?
|
AC abnormal
BC abnormal AB gap |
|
What type of management is considered for mixed hearing loss?
|
refer for medical attention, amplification or aural rehab
|
|
What kind of configuration is worst in the mid frequencies and gets better at high and low frequency?
|
trough
|
|
What kind of configuration has thresholds 20 dB across range?
|
flat
|
|
What kind of configuration has high frequencies that are 20 dB poorer than low frequencies?
|
sloping
|
|
What kind of configuration has low frequencies that are 20 dB poorer than high frequencies?
|
rising
|
|
What kind of configuration is 20 dB or more per octave in high frequency?
|
precipitous sloping
|
|
When do you provide masking?
|
when a hearing loss is asymmetrical
|
|
What does masking assure?
|
That the threshold is response of the test ear and not the non test ear
|
|
What is the symbol for AC masking for right ear?
|
triangle
|
|
What is the symbol for AC masking for left ear?
|
square
|
|
What are the BC symbols for masking?
|
[ for the right ear
] for the left ear |
|
What does this statement refer to..."speech is a succession of sounds varying in time in intensity and frequency"?
|
average speech spectrum
|
|
In order for listeners to understand a speech signal, the signal must reach the ear with ...
|
sufficient intensity
|
|
Are vowels low or high in frequency?
|
low
|
|
Are vowels low or high in intensity?
|
high
|
|
Are consonants low or high in frequency?
|
high
|
|
Are consonants high or low in intensity?
|
low
|
|
What is the audibility index (AI)?
|
contribution of frequency band illustrated with 100 dots to determine total speech signal that is audible to listener
|
|
What is the number range for AI?
|
0.0-1.0
|
|
Does noise contain high or low frequency energy?
|
low frequency
|
|
What device do you use to measure noise in the environment?
|
sound level meter
|
|
What are three reasons (or scales) a SL meter is used for?
|
1. noise harmful for hearing
2. determine if location is suitable for screening 3. amount of noise in classroom |
|
Sound to noise ratio is the difference between....
|
levels of signal (speech) relative to the background noise
|
|
If the level of the signal is 60dB and the level of noise is 50 dB, what is the signal to noise ratio?
|
10 dB
|
|
If the level of signal is 50 dB and the noise if 60 dB, what is the signal to noise ratio?
|
-10 dB
|
|
Signal to noise ratio usually depends on what 5 factors?
|
1. language level
2. first language and background knowledge 3. language impairment 4. hearing loss 5. age |
|
What law states that as the distance between the speaker and listener is doubled, the sound pressure level is decreased by 6 dB?
|
inverse square law
|
|
If the signal to noise ratio is 6 dB at 3 ft, what would it be at 6 ft?
|
0 dB
|
|
What does this define, "amount of time it takes for a sound to decrease by 60 dB"?
|
reverberation time
|
|
The.....the reverberation time, the longer the sound lingers in acoustic environment
|
greater
|
|
Do you want short or long reverberation time for children in the classroom?
|
short
|
|
What is the RT for normal hearing children?
|
should not exceed <0.6 sec
|
|
What is the RT for children with hearing loss?
|
should not exceed <0.5 sec.
|
|
What RT does ASHA recommend?
|
should not exceed <.4 sec
|