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Improving the frequency specificity of the auditory brain stem response.
T C Robier1, D A Fabry, M R Leek
1Army Audiology and Speech Center, Walter Reed Army Medical Center, Washington, DC.
Ear and Hearing
|August 1, 1992
Summary
Nonlinear windowing functions effectively improve auditory brain stem response (ABR) frequency specificity. This study found no significant differences in ABR wave V latency across various windowing functions for normal-hearing and hearing-impaired adults.
Area of Science:
- Audiology
- Neuroscience
- Signal Processing
Background:
- Auditory brain stem response (ABR) is crucial for assessing auditory function.
- Nonlinear windowing functions are proposed to enhance ABR frequency specificity.
- High-frequency hearing loss can impact click-evoked ABR results.
Purpose of the Study:
- To investigate the impact of different windowing functions on ABR.
- To compare ABR outcomes in normal-hearing versus high-frequency hearing-impaired adults.
- To evaluate the effectiveness of nonlinear windowing for tonal stimuli.
Main Methods:
- 30 normal-hearing and 30 high-frequency hearing-impaired adults participated.
- Subjects underwent ABR testing with click and 500 Hz tone burst stimuli.
- Five windowing functions (one linear, four nonlinear) were applied to the tone burst.
Main Results:
- No significant differences in wave V latency were observed between groups for any windowed tone burst.
- All tested windowing functions yielded comparable results for 500 Hz tonal ABRs.
- This suggests robustness of the 500 Hz tonal ABR across different windowing methods in this population.
Conclusions:
- The choice of windowing function does not significantly alter 500 Hz tonal ABR wave V latency in normal-hearing or high-frequency hearing-impaired adults.
- Nonlinear windowing functions are effective for 500 Hz tonal ABRs in this population.
- These findings support the use of various windowing functions for assessing auditory function in individuals with high-frequency hearing loss.