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21 Cards in this Set
- Front
- Back
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Auricle or Pinna
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– Cartilaginous structure – Collects and directs sound waves into external auditory canal |
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External Auditory Canal
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– Directs airborne sound waves towards the tympanic membrane (eardrum) – Resonates sound waves and increases the loudness of the sound in the 3000-4000 Hz range |
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Tympantic membrane
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Vibrates back and forth as the sound waves strike
– Transmits from the outer to the middle ear |
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Word Recognition Test:
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Assesses how well the client is able to identify one-syllable words presented at some level above threshold
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Speech Recognition Threshold
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The lowest intensity where a person can recognize 50% of the words presented
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Behavioral Observation Audiometry:
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Audiologist presents a stimulus through a loud speaker and observes a child’s reaction
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Visual Reinforcement Audiometry (VRA)
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A child is rewarded for a head-turn response to sound by an animated or lighted toy
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Tympanometry:
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To determine the status of the tympanic membrane and middle ear
– Changes in middle ear immittance is measured while air pressure is varied in the ear canal |
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An acoustic reflex:
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Measures contraction of the muscles is middle ear connected to stapes in response to higher intensity sounds.
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Otoacoustic emission testing:
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Recording of sounds generated by the cochlea
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Auditory brainstem response (ABR):
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A test of auditory brain stem function in response to auditory (click) stimuli.
– is performed by fixing electrodes on the head and recording brain wave activity |
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Personal Hearing Aids
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A small electronic device that makes sounds louder
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Cochlear Implants
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Electronic device that provides a sense of sound to a person who is profoundly deaf or severely hard-of-hearing
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Hearing Assistive Technology
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Used to overcome problems hearing in various situations
Personal frequency modulation (FM) systems – Can be used in classrooms, theaters, museums, large areas for gathering. |
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Normal hearing |
-10 -+15 dB HL |
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Profound |
91 dB HL and higher |
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Severe |
71-90 dB HL |
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Moderate to severe |
56-70 dB HL |
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Moderate |
41-55 dB HL |
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Mild |
20-40 dB HL |
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Minimal |
16-25 dB HL |
