Exam 1 Flashcards
If your headphones stop working, can you plug in headphones of the same type and still have a valid test? Why or why not?
No, you cannot. This is because the headphones are calibrated based on the audiogram that they are plugged into. If you move those headphones to an audiogram that it wasn’t calibrated to, the test would not be valid.
When describing a tympanic membrane perforation, what two features with regards to the perforation itself need to be reported?
The size of the perforation and the location of the perforation should be reported when describing a tympanic membrane perforation.
all the frequencies that are to be routinely tested via air conduction in a standard audiogram per ASHA 2005 guidelines.
250, 500, 1000, 2000, 3000, 4000, 6000, 8000
Which frequencies are averaged in the typical pure tone average? (3-frequency)
500, 1000, and 2000 Hz
What is the difference between the speech recognition threshold (SRT) and the speech awareness threshold (SAT, also referred to as the speech detection threshold, SDT)? What is considered good agreement between the pure tone average the SRT? What is considered good agreement between the pure tone average and the SAT?
SRT is when they are able to repeat the spondee words back correctly 50% of the time at their absolute threshold. SAT is the ability to detect the spondee stimuli 50% of the time at their absolute threshold.
Good agreement for the SRT is 10dB above or below the PTA and for SAT is should be 15-20 dB better only.
Define each of the following dB types: dB SPL, dB HL, and dB SL. Make sure to include the definition and not just what the letters stand for.
dB SL is the difference between the threshold and the presentation level.
dB SPL is the hearing thresholds in humans and dB HL takes those hearing thresholds and makes them so they all equal 0dB and are represented by a straight line instead of the hearing thresholds curves shown for dB SPL. For example, 20 dB SPL equals 0 dB HL.
What is the dB SL if the presentation level is 65 dB HL and threshold is 45 dB HL?
20
1) Why do we calibrate for speech testing, even though our audiometers are already calibrated for pure tones?
2) Why do we calibrate each time we use a different CD?
We calibrate for speech testing because we have to tell the audiometer about the amplitude that is being inputted. For example, MLV that was calibrated in the morning fluctuates and changes as the day goes on so it is important to always monitor during the entire MLV. Another example is because my voice calibration for an audiometer will not be the same as it would be for one of my classmates so it is important to make sure the speech stimuli we are presenting is what we want to be presenting.
We calibrate each time we use a different CD because the CD’s are different.
Imagine you were teaching someone how to seat a patient for sound field testing. What would you tell them? Include two important considerations for how you would seat a patient in the booth for sound field testing.
When seating a patient for sound field testing, it is important to have the chair situated under the place where the speakers were calibrated to for that sound field testing. For us, we have to make sure that they are correctly situated under the stickers in our booths. We also have to make sure they are seated at the correct azimuth that the seat was calibrated to in relation to the speakers. Another important consideration to note is to determine where the sound is coming from in relation to the patient. For example, is the right speaker the patient’s right or the audiologist’s right where the sound is being presented from?
What are two key ingredients to correct differential diagnosis?
an excellent case history and a thorough physical examination.
List two advantages to taking at least part of a case history orally.
One advantage is that you are able to build a rapport with the patient. A second advantage is that you are able to have a better understanding as to how well they are able to communicate and how well they are hearing you during conversations.
If you were tasked with designing a case history form to be used as a written form that the patient fills out before the appointment, what important considerations would you make sure to implement? Name 3.
One important consideration is making sure you have the form available in the languages that are relevant to your area that you practice in. Another important consideration is keeping it at a simple reading level. The third consideration is keeping it concise.
What are the RETSPL values for speech for supra-aural headphones and for inserts?
20
13
Why are RETSPL values different for different transducers?
They are different because the ear canal size and volume differs with each transducer type and they are calibrated to represent this difference.
What is the name of the organization that creates standards used in audiology?
ANSI
