Audiology Exam #2.txt

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nikkigloudeman
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181605
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Audiology Exam #2.txt
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2012-11-05 20:16:05
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Audiology Exam
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Auditory Evoked Potentials
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  1. what are otoacoustic emissions?
    Low intensity sounds that are emitted as a result of basilar membrane movement in response to sounds
  2. Otoacoustic Emissions are typically in the range of _____?
    -10 to 20 dB SPL
  3. what is "Transient Evoked ?"
    • Emissions elicited in response to short “transient” sounds.
    • “Click” sound that elicits a broad frequency response from      the cochlea.
  4. what is "Distortion Product?"
    Emissions that occur in response to multiple pure tone inputs
  5. what is distortion?
    When something is present in the ouput that was not present in the input.
  6. what frequencies is transient (TE) measured?
    1-4kHz
  7. is TE better in low-frequencies or high frequencies?
    low frequencies
  8. which kind of hearing loss is TE more sensitive to?
    cochlear hearing loss
  9. what frequencies is Distortion Product (DPOAES) measured from?
    1-6kHz
  10. Is the Distortion Product better is high-frequencies or low-frequencies?
    high-frequencies
  11. which two things are needed to indicate the presence of an emission?
    • Signal to Noise
    • Reproductibility
  12. what range is Signal to Noise typically in?
    3-6 dB SNR
  13. what is the lowest percentage and ideal percentage for reproductibility?
    >50%, closer to 100% is ideal
  14. what are OAEs a relatively sensitive indicator of?
    cochlear status
  15. TEOAEs are typically absent for SNHL greater than ____?
    35 dB HL
  16. DPOAEs are ____ (less/more) sensitive, may be present, but reduced up to ______ dB of SNHL
    • less
    • 50-60 dB of SNHL
  17. Otoacoustic emissions are useful as a screening tool for the following reasons: (6 reasons)
    • Relatively inexpensive
    • Physiological response – does not require patient input
    • Present at birth
    • Can quickly rule out many forms of hearing loss
    • Present in 99% of ears with threshold  20 dB HL
    • Rules out CHL (OE/ME)
  18. what is Auditory Evoked Potential ?
    Electrophysiological response to auditory input.
  19. what are some benefits to Auditory Evoked Potential?
    • Does not require patient response
    • Requires good neural synchrony to obtain an adequate reading
    • Response is a direct correlate of lower central auditory nervous system function
  20. what is Transient Stimuli?
    • wide-frequency spectrum.
    • Elicits a large neural response that mostly represents neural responses to 1-4 kHz sounds.
  21. ABR occurs between ______ after stimulus onset in normal hearing adults.
    2-10 mS
  22. As intensity decreases the latency of the response_______ (increases/decreases) due to the number of neural fibers that are “recruited” by the amplitude of the input stimulus.
    decreases
  23. what auditory structure does Wave I correspond to?
    Distal Auditory Nerve Fibers
  24. what auditory structure does Wave II correspond to?
    Proximal Auditory Nerve
  25. what auditory structure does Wave III correspond to?
    Cochlear Nucleus
  26. what auditory structure does Wave IV correspond to?
    Superior Olivary Complex/Lateral Lemniscus
  27. what auditory structure does Wave IV correspond to?
    Inferior Colliculus
  28. Why is ABR useful?
    • Objective measure of auditory system function in difficult to test patients
    • Evaluation of VIII CN disorders
    • Screening for newborns, including follow-up when NBHS is performed with otoacoustic emissions
  29. what is speech audiometry?
    Audiometric assessment tool that uses speech as the stimulus(i)
  30. what is monitored live voice?
    the presentation of speech stimuli using the tester’s voice via a microphone.
  31. whats a spondee?
     Two-syllable, equal stress word
  32. what is Speech Recognition Threshold (SRT)?
     The softest level speech stimulus that a patient can identify at least 50% of the time.
  33. what is "phonetically balanced?"
    suggests that a given word list is an adequate representation of the speech sounds as they would occur in the language.
  34. what is PBmax?
    Maximum obtainable word score for an individual.
  35. what is the cross-check principle?
    The concept that using multiple tests that provide similar information may improve the validity of the overall test battery.
  36. what is the dynamic range?
     The range of usable hearing.
  37. what is Uncomfortable Loudness Level/Loudness Discomfort Level?
    The sound level (dB HL) that is described as being undesirable to listen to because it causes discomfort.
  38. Most Comfortable Loudness (level, MCL) ?
    The most desirable level to listen to speech. 
  39. waht is the Best correlation to pure-tone audiometry?
    between 300-6000 Hz
  40. what are some response techniques?
    • Picture Identification
    • Recitation
    • Response similar to VRA/Standard audiometry
    • Open/Closed Set
    • Whole Word/Phoneme

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