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  1. Talk back
  2. VU meter calibration
  3. A Tympanometer includes...
  4. Tympanometer
  5. Types of Audiometer: channels
  6. Otoacoustic Emmission (OAEs)
  7. External inputs calibration
  8. Purpose of Daily Listen Checks?
  9. Types of Audiometers: 1-4
  10. How do we run a daily listening check?
  11. How do we run a daily listening check on a tympanometer?
  12. What type of audiometer do we usually take to schools?
  13. Standards
  14. Calibration of audiometers
  15. Microphone caliration
  16. Talk over
  17. Types of Audiometers: A-C
  18. Parts of speech audiometer
  19. Basic parts of a Tympanometer
  20. Daily listen checks for hearing screenings
  22. Parts of an Immittance Bridge
  23. Types of Transducers
  24. How do we run a daily listening check on a OAEs?
  25. Parts of an audiometer
  1. a -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
  2. b • 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)
  3. c •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
  4. d 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
  5. e -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
  6. f always perform a listening check on the screening audiometer before taking it out of the clinic
  7. g Has to be calibrated to each voice, use VU meter and strive for 0. Adjust while giving instructions
  8. h •Attenuator- intensity dial
    •Frequency selector- lets you change the Hz you're testing
    •Talk over dial
    •Talk back dial
    •VU meter- for speech
  9. i -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. j • Tympanometry
    • Acoustic Reflexes
    • Acoustic Reflex Decay
    • Eustachian Tube Function
  11. k •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.
  12. l •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)
  13. m -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.
  14. n •Probe (3 holes)- mic, pressure, sound generator
    •Daily Check- cavities (if volume off, could be holes), shelf-check
  15. o -A DLC is when the clinician checks all the audiological equipment before testing a patient.
    -Should be performed on all patients
  16. p • 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.
  17. q -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
  18. r Check BOTH ears!

    • Make sure you can hear sounds playing out of each ear.
    • If you have normal hearing you should have present OAEs
  19. s -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
  20. t • 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
  21. u Device that measures the immittance of the middle ear system, or how well the middle ear is functioning.
  22. v pt's voice; to hear them
  23. w •Microphone
    •External inputs
    •VU meter
    •Talk over/talk back
  24. x my voice; make sure it's not turned up all the way; so pt. hears you
  25. y 4,1,C