Masking

Card Set Information

Author:
jacwill
ID:
259648
Filename:
Masking
Updated:
2014-02-01 15:05:59
Tags:
355 aud
Folders:

Description:
aud
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  1. most difficult task for an audiologist
    • masking
    • validity of many aud tests is dependent on the proper use of masking
  2. what is the need for masking
    • to determine which ear is really responding
    • due to interaural attenuation
  3. at what db does masking cross the skull
    • at 40 db for ac
    • at 0 db for bc
  4. how does it work
    • one ear is masked with white noise while the other is given the stimulus
    • narrowband noise is the most efficient
  5. narrowband width
    • critical band width
    • max masking with min sound pressure
  6. central masking
    • small shift is seen in the threshold of a pure tone when a masking noise is introduced to the opposite ear
    • avg about 5 db
    • produced by inhibition that is sent down from the auditory centers in the brain

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