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Effect of click polarity on ABR threshold
1Electrophysiology Laboratory, House Ear Institute, Los Angeles, California.
Ear and Hearing
|June 1, 1990
Summary
Click polarity does not impact auditory brain stem response (ABR) detection in normally hearing adults. This finding suggests that rarefaction and condensation clicks yield similar threshold detectability for ABR testing in this population.
Area of Science:
- Audiology
- Neuroscience
- Hearing Science
Background:
- The auditory brain stem response (ABR) is a key electrophysiological measure for assessing auditory pathway function.
- Understanding factors influencing ABR threshold detectability is crucial for accurate hearing assessment.
Purpose of the Study:
- To determine if click polarity (rarefaction vs. condensation) affects the threshold detectability of the auditory brain stem response (ABR).
- To evaluate the influence of click polarity on the objective signal-to-noise estimator (Fsp) in ABR measurements.
Main Methods:
- Auditory brain stem responses (ABRs) were recorded from 10 normally hearing adults.
- Rarefaction and condensation clicks were presented at levels from 0 to 10 dB SL in 2 dB steps.
- The Fsp metric served as the dependent variable to assess response detectability.
Main Results:
- Auditory brain stem response (ABR) detectability functions, plotted as Fsp by dB SL, showed no significant difference based on click polarity.
- The objective response signal-to-noise estimator (Fsp) was not significantly influenced by whether rarefaction or condensation clicks were used.
Conclusions:
- For normally hearing adults, click polarity does not significantly affect auditory brain stem response (ABR) threshold detection.
- These findings are specific to the tested population and may not generalize to individuals with hearing impairments.