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Updated: Apr 20, 2026
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Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
Published on: May 10, 2019
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Background noise can enhance cortical auditory evoked potentials under certain conditions
Melissa A Papesh1, Curtis J Billings2, Lucas S Baltzell1
1National Center for Rehabilitative Auditory Research, Portland VA Medical Center, 3710 SW US Veterans Hospital Road, Portland, OR 97207, USA.
Summary
Background noise can enhance negative cortical auditory evoked potential (CAEP) peaks, while binaural presentation boosts positive peaks. Understanding these effects is crucial for interpreting CAEPs in noisy environments.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Signal Processing
Background:
- Cortical auditory evoked potentials (CAEPs) reflect neural processing of sound.
- Understanding neural encoding in noise is vital for auditory perception.
- The impact of noise and presentation methods on CAEPs requires clarification.
Purpose of the Study:
- To investigate how background noise affects neural encoding using CAEPs.
- To determine conditions under which noise enhances CAEP responses.
- To examine the influence of binaural versus monaural presentation on CAEPs.
Main Methods:
- Recorded CAEPs from 16 normal-hearing listeners.
- Presented the speech syllable /ba/ in quiet and speech-shaped noise (SNRs 10 and 30 dB).
- Used binaural and monaural presentation at two rates.
Main Results:
- Negative peaks (N1, N2) were often enhanced by low-level noise.
- Positive peaks (P1, P2) amplitudes were reduced in noise.
- Positive peaks were larger in binaural compared to monaural presentations; negative peaks were similar.
Conclusions:
- Methodological choices significantly influence CAEPs in quiet and noise.
- Negative CAEP peaks can be enhanced by noise under specific conditions.
- Positive CAEP peaks are generally enhanced by binaural presentation.
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