CSDS 131 Exam 3 Study Guide

Acoustic Immittance

Objective measure of middle ear function, includes impedance and admittance measurements to assess how well the middle ear system is working and detect abnormalities.

Peak Compliance

Measures mobility of the tympanic membrane in response to air pressure changes, indicating the compliance or stiffness of the middle ear system.

Tympanometry

Measures middle ear pressure and tympanic membrane compliance, providing a graph (tympanogram) that shows changes in stiffness or compliance of the middle ear system.

Ear Canal Volume

Measures the volume from the probe tip to the tympanic membrane, assessing the admittance of the outer ear and detecting abnormalities like a hole in the eardrum.

Acoustic Reflex

Involves contraction of middle ear muscles in response to high-intensity sounds, indicating an increase in middle ear stiffness associated with muscle contraction.

Point of Maximum Compliance

When pressure on both sides of the tympanic membrane is equal, used in peak static acoustic compliance testing.

Static Acoustic Admittance

Typical values range from 0.25-1.7 mmho, with values outside the normal range indicating issues like stiffness or excessive compliance in the middle ear system.

Jerger’s Classification System

Categorizes tympanograms into types A, As, Ad, B, and C, each suggesting different middle ear conditions based on compliance and pressure measurements.

Ear Canal Volume

Provides normative values for different age groups, with values outside the normal range indicating issues like blockage or perforation.

Acoustic Reflex Arc Pathway

Involves ipsilateral and contralateral pathways of the acoustic reflex, with specific findings for conductive and sensorineural hearing losses.

Acoustic Reflex Decay

Optional test to identify retrocochlear pathologies, assessing the decay of the acoustic reflex response over time.

Speech Tests

Include SRT, SDT, and WRT to evaluate speech recognition thresholds, detection thresholds, and word recognition abilities in individuals.

Relationship between SRT, SAT, and PTA

Describes the expected differences between speech recognition thresholds, speech detection thresholds, and pure-tone audiometry results.

Methods for Presenting Speech Material

Discusses the advantages and disadvantages of using CD, digital speech, and live voice with VU meter for speech testing.

Word Recognition Testing

Evaluates an individual's ability to understand speech stimuli presented above threshold levels, aiding in diagnosis and treatment planning.

Performance Intensity

Determines the intensity level at which an individual performs maximum speech understanding, with rollover indicating possible retrocochlear pathology.

Word Recognition Scores

Interpretations of scores ranging from normal limits to very poor recognition, providing insights into speech recognition difficulties and treatment prognosis.

Evoked OAE

A type of otoacoustic emission that is elicited by an external stimulus.

CHL (Conductive Hearing Loss)

A type of hearing loss where the sound is not conducted efficiently through the outer or middle ear.

Retrocochlear Pathology

Pathology beyond the cochlea that affects hearing, such as issues with the auditory nerve or brainstem.

Refer or Pass (EOAE)

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Indicates no significant hearing loss that could affect communication.

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Suggests a risk for hearing loss that may impact communication.

ABR Test (Auditory Brainstem Response)

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PTA (Pure Tone Average)

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Average of thresholds at 500, 1k, and 2k Hz frequencies.

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