Measurement of signal and noise characteristics in ongoing auditory brainstem response averaging |
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Authors: | Özcan Özdamar Rafael E Delgado |
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Institution: | (1) Intelligent Hearing Systems Corporation, Miami, FL;(2) Department of Biomedical Engineering, University of Miami, P.O. Box. 248294, 33124 Coral Gables, FL, U.S.A. |
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Abstract: | Although diagnostic testing with auditory evoked potentials (EPs) has become routine, quantitative measurements of signal
and noise are still lacking. In this study, current signal, power, noise power, and signal-to-noise ratio (SNR) estimation
formulas are reviewed and applied to auditory brainstem response averaging. Single-sweep responses to individual sound stimuli
are recorded and estimation formulas are evaluated during off-line averaging under various sound level and noise conditions.
The results show that the quality of the averaged EP can be quantitatively assessed by the continuous display of the SNR and
residual noise estimates during the averaging process. This method also allows the study of different types of averaging techniques
to improve EP response acquisition. |
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Keywords: | SNR Auditory brainstem response Averaging Evoked potential Artifact rejection |
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