Term
| Objective Physiological Measures |
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Definition
| Don't require clients cooperation, allow testing of each ear individually, directly assesses the physiological integrity of the lower portions of the auditory system |
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Term
| Objective Physiological Measure Tests |
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Definition
| Acoustic immittance, auditory brain stem response (ABR), otoacoustic emissions (OAE) |
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Term
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Definition
| Measures how well sound is accepted into the middle ear, non-audiological technique |
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Term
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Definition
| Measure of difficulty with which energy flows through a system, unit ohm |
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Term
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Definition
| Measure of ease with which energy flows through a system, unit mho |
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Term
| Primary Purpose of Acoustic Immittance Testing |
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Definition
| Determine the status of the tympanic membrane and middle ear |
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Term
| Secondary Purpose of Acoustic Immittance Testing |
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Definition
| Determine acoustic reflex threshold and evaluate acoustic reflex pathways |
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Term
| Components of an Acoustic Immittance Meter (Tympanometer) |
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Definition
1. Oscillator to generate a pure tone (226hz, 85dBSPL)
2. Air pump and manometer for varying air pressure
3. Microphone to measure the reflected sound way |
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Term
| Basic Measures of Acoustic Immittance |
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Definition
| Tympanometery, static acoustic compliance (SAC), acoustic reflex threshold (ART) |
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Term
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Definition
| Measurement of the middle ear pressure, determined by the mobility of the tympanic membrane as a function of positive and negative air pressure in the external ear canal |
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Term
| Normal Tympanometery Range |
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Definition
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Term
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Definition
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Term
| Static Acoustic Compliance (SAC) |
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Definition
| Mobility of the tympanic membrane with a given value of air pressure in the external ear canal |
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Term
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Definition
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Term
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Definition
1-2.5 (adults)
.5-2 (kids) |
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Term
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Definition
| Could be perforation in middle ear |
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Term
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Definition
| Ear wax or some other substance taking up space in the ear canal |
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Term
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Definition
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Term
| Typanogram Width or Gradient |
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Definition
| Calculated by determining the daPa corresponding to 50% of peak static immittance |
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Term
| Acoustic Reflex Threshold |
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Definition
| Contraction of the middle ear muscles in response to intense sounds, the lowest possible intensity needed to elicit contraction |
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Term
| Normal Acoustic Reflex Threshold |
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Definition
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Term
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Definition
| Low level sounds that come from the ear, by product of amplification from the outer hair cells, spontaneous and evoked |
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Term
| Auditory Brain Stem Response (ABR) |
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Definition
| Measure of electrical activity coursing through the auditory pathway, uses tone bursts or clicks, when intensity decreases latency becomes longer and peaks decrease |
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Term
| Auditory Brain Stem Latency |
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Definition
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Term
| Cerebral Cortex/Auditory Event Latency |
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Definition
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