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25 Multiple choice questions

  1. -If you listen/use the microphone, it has to be calibrated through your voice. Strive to be right at 0.
    -Works for your voice and external inputs
    -Check EVERYTIME
  2. -A DLC is when the clinician checks all the audiological equipment before testing a patient.
    -Should be performed on all patients
  3. my voice; make sure it's not turned up all the way; so pt. hears you
  4. •Standard (regular headphones)
    •Inserts (makes sound louder so you have to adjust for that)
    •High freq. or Supra-aural headphones (whole ear is inside & lets us test 8K Hz)
    •Sound field (height, distance, and locations matter in terms of calibration)
    •Bone oscillator (calibrated on forehead or mastoid)
  5. •Microphone
    •External inputs
    •VU meter
    •Talk over/talk back
  6. •International Organization for Standardization (ISO)
    •International Electrotechnical Commission (IEC): showing electronically it won't hurt anyone
    •American National Standard Specification for Audiometers (ANSI): depending on the class of audiometers they are putting out the same thing
    •Acoustical Society of America (ASA)
    •ASHA: require that if we take out a portable audiometer we fill out checklist and it needs to be completed before you screen (ANSI and licensure board require the same)
    •Texas Requirements: fill out green cards
    •On the General Audiometer Checklist (Ideally all should be checked "no" but #12 should be checked "yes.")
    •Required to check the Audiometers.
  7. Check BOTH ears!

    • Make sure you can hear sounds playing out of each ear.
    • If you have normal hearing you should have present OAEs
  8. •Probe (3 holes)- mic, pressure, sound generator
    •Daily Check- cavities (if volume off, could be holes), shelf-check
  9. -You will need a partner to be in the sound booth. --First check, air conduction testing while using the headphones.
    -The person in the booth should be able to hear the signal at each frequency (250-8000 Hz).
    -Next, use the bone oscillator and to the same.
    -Finally check sound field speakers.
    -There is a checklist in the booths
  10. always perform a listening check on the screening audiometer before taking it out of the clinic
  11. Has to be calibrated to each voice, use VU meter and strive for 0. Adjust while giving instructions
  12. •Attenuator- intensity dial
    •Frequency selector- lets you change the Hz you're testing
    •Talk over dial
    •Talk back dial
    •VU meter- for speech
  13. • 1. You can check your own ear and should see normal
    • 2. Use a 2 cc. Coupler that is in the clinic. You should see a volume of 2ml.
  14. pt's voice; to hear them
  15. -Internal components that let you take a particular signal, specifically pure tone, control the frequency and you can handle ears separately with 2 channels
    -1 Channel: can only use one transducer at a time
    -1 ½ Channels: let's you do some things at the same time; just can't do two different transducers
    -2 Channel: very expensive; handles ears complete separately
  16. • Save time
    • If there is problem with the equipment, we would like to fix it or find a solution BEFORE the patient is seen
    • Ensure that test results obtained are accurate
    • Is the person not responding because they have a HL or is it
    because our equipment isn't functioning?
    • RED FLAGS: Asymmetrical HL, No response in soundbooth but patient can hear just fine in person.
    • Professionalism
  17. 4,1,C
  18. • Tympanometry
    • Acoustic Reflexes
    • Acoustic Reflex Decay
    • Eustachian Tube Function
  19. -Type A: (the best) let's you do anything (i.e. microphone, CD) for speech testing.
    -Type C: limited options (maybe a tape); least amount of speech ability
  20. Device that measures the immittance of the middle ear system, or how well the middle ear is functioning.
  21. -Tape players, CDs, iPods, MP3s.
    -Must be calibrated daily.
    -Tones usually played at a 1000 Hz, but you need to adjust the tone at 0 on the VU meter.
  22. -1 is the best for diagnostics. Has all inputs
    -4 is pure tones. NO speech, best for hearing screenings.
    -Some may be able to turn up louder than they are calibrated for, so always check
  23. Device that tests the outer hair cell function of a person. You put a probe that plays an sound into each ear.
    • Can be software installed on a computer
    • Can be a handheld screener
  24. •To ANSI standards
    •Annually → most people hire a company to calibrate
    •Quarterly →only if we test in noisy environments, only for OSHA
    •Monthly→ booths
    •Daily checks → we do this if we are the 1st person in the clinic
  25. • Immittance Bridge or the "Box" - holds the probe and stimulus tubes
    • Probe tips - placed on the end of the probe, come in different sizes (adult - pediatric)